[PATCH v2 00/12] clk: qcom: Add PDM GP_MN fractional clock divider driver and DT support

[PATCH v2 00/12] clk: qcom: Add PDM GP_MN fractional clock divider driver and DT support

[Taniya Das]

The Peripheral Web PDM block on several Qualcomm SoCs contains a GP_MN
fractional divider that generates a clock output from the PDM XO4 clock.
The output can be routed to a dedicated GPIO pin for use as an external
reference clock.

This series adds the binding, a runtime PM-aware GP_MN divider driver,
and the GCC, pinctrl, and DT support needed on QCS615, QCS8300, SA8775P,
and SC7280. GP_MN controller nodes are disabled by default so boards must
explicitly opt in before the output pin is muxed.

Changes in v2:
- Add SoC-specific compatible strings with a qcom,sc7280-gp-mnd
  fallback, map the 0x1000-byte register region, and document the PDM
  source rates. [#Konrad Dybcio]
- Use runtime PM and pm_clk for AHB register-access clock management,
  rely on the pinctrl core's default-state selection, and generate the
  output-clock name. [#Dmitry Baryshkov]
- Enforce valid GP_MN duty-cycle constraints and report high-phase duty
  cycles through the common clock framework.
- Add and register configurable PDM XO4 divider clocks and their public
  IDs for all supported SoCs, allowing the source rate to be configured.
- Split the pinctrl changes by SoC, retain Reviewed-by tags, and combine
  each SoC's pin state and controller node into one DTS patch.
  [#Konrad Dybcio]
- Correct the SC7280 output to gpio60 and disable every GP_MN controller
  node by default. Add QCS615 support as well. [#Luca Weiss]
- Link[v1]: https://lore.kernel.org/lkml/20260602-pdm_clk_gp_mnd_v1-v1-0-1522662b6c53@oss.qualcomm.com/

The series is organized as follows:

  1. DT binding for the PDM GP_MN divider
  2. GCC PDM XO4 divider clock IDs
  3. PDM GP_MN divider driver
  4. GCC PDM XO4 divider clocks
  5-8. GP_MN pin mux support for QCS8300, SA8775P, SC7280, and QCS615
  9-12. GP_MN DT support for QCS8300, SA8775P, SC7280, and QCS615

Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
---
Taniya Das (12):
      dt-bindings: clock: qcom: Add bindings for PDM GP_MN clock divider
      dt-bindings: clock: qcom: Add PDM XO4 divider clock IDs
      clk: qcom: Add a driver for PDM GP_MN fractional clock divider
      clk: qcom: gcc: Add configurable PDM XO4 div clocks across targets
      pinctrl: qcom: qcs8300: Add gp_mn mux function
      pinctrl: qcom: sa8775p: Add gp_mn mux function
      pinctrl: qcom: sc7280: Add gp_mn mux function
      pinctrl: qcom: qcs615: Add gp_mn mux function
      arm64: dts: qcom: qcs8300: Add GP M/N clock controller
      arm64: dts: qcom: sa8775p: Add GP M/N clock controller
      arm64: dts: qcom: sc7280: Add GP M/N clock controller
      arm64: dts: qcom: qcs615: Add GP M/N clock controller

 .../devicetree/bindings/clock/qcom,clk-gp-mnd.yaml |  98 ++++++
 arch/arm64/boot/dts/qcom/kodiak.dtsi               |  21 ++
 arch/arm64/boot/dts/qcom/lemans.dtsi               |  21 ++
 arch/arm64/boot/dts/qcom/monaco.dtsi               |  21 ++
 arch/arm64/boot/dts/qcom/talos.dtsi                |  21 ++
 drivers/clk/qcom/Kconfig                           |  15 +
 drivers/clk/qcom/Makefile                          |   1 +
 drivers/clk/qcom/clk-gp-mnd.c                      | 333 +++++++++++++++++++++
 drivers/clk/qcom/gcc-qcs615.c                      |  20 ++
 drivers/clk/qcom/gcc-qcs8300.c                     |  20 ++
 drivers/clk/qcom/gcc-sa8775p.c                     |  20 ++
 drivers/clk/qcom/gcc-sc7280.c                      |  20 ++
 drivers/pinctrl/qcom/pinctrl-qcs615.c              |   8 +-
 drivers/pinctrl/qcom/pinctrl-qcs8300.c             |   9 +-
 drivers/pinctrl/qcom/pinctrl-sa8775p.c             |   8 +-
 drivers/pinctrl/qcom/pinctrl-sc7280.c              |   8 +-
 include/dt-bindings/clock/qcom,gcc-sc7280.h        |   1 +
 include/dt-bindings/clock/qcom,qcs615-gcc.h        |   2 +
 include/dt-bindings/clock/qcom,qcs8300-gcc.h       |   1 +
 include/dt-bindings/clock/qcom,sa8775p-gcc.h       |   1 +
 20 files changed, 645 insertions(+), 4 deletions(-)
---
base-commit: 4eb2586bd40db27d77cc5b724ca9386ed0c71d53
change-id: 20261013-b4-pdm_clk_gp_mnd_v2-993396fc6cac

Best regards,
-- 
Taniya Das <taniya.das@oss.qualcomm.com>

[PATCH v2 01/12] dt-bindings: clock: qcom: Add bindings for PDM GP_MN clock divider

[Taniya Das]

Add device tree bindings for the Qualcomm Peripheral Web's PDM GP_MN
clock divider. The hardware generates a fractional output frequency
from a fixed input clock (typically TCXO4) using the relation
Fout = Fin * (M / N), with duty cycle controlled by a separate D
register. The clock output is routed over a gpio controlled pin.

Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
---
 .../devicetree/bindings/clock/qcom,clk-gp-mnd.yaml | 98 ++++++++++++++++++++++
 1 file changed, 98 insertions(+)

diff --git a/Documentation/devicetree/bindings/clock/qcom,clk-gp-mnd.yaml b/Documentation/devicetree/bindings/clock/qcom,clk-gp-mnd.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..8141f392c5d70acfc42cf1ff4b1722e1eff23afa
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/qcom,clk-gp-mnd.yaml
@@ -0,0 +1,98 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/clock/qcom,clk-gp-mnd.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm Peripheral Web's PDM GP_MN Clock Divider
+
+maintainers:
+  - Taniya Das <taniya.das@oss.qualcomm.com>
+
+description: |
+  The Peripheral Web's PDM GP_MN clock divider receives an input clock
+  (TCXO4) with frequency Fin and generates an output clock with
+  frequency Fout = Fin * (M / N) and a duty cycle controlled by D
+  and routed over a gpio pin.
+
+  The divider is configured using three registers:
+
+  - GP_MN_CLK_MDIV: holds the M value.
+  - GP_MN_CLK_NDIV: holds the ones complement of (N - M).
+  - GP_MN_CLK_DUTY: holds the D value.
+
+  For every N input clock cycles the GP_MN produces M output clock
+  cycles. D is the number of native clock cycles in which the GP_MN
+  output is low, counted over 2^13 native clock cycles.
+
+  Hardware constraints:
+
+    M <= 511
+    N <= 8191
+    N > 2 * M
+    M < D < (N - M)
+    M and N must be coprime (no common divisor)
+
+properties:
+  compatible:
+    oneOf:
+      - const: qcom,sc7280-gp-mnd
+      - items:
+          - enum:
+              - qcom,sa8775p-gp-mnd
+              - qcom,qcs8300-gp-mnd
+              - qcom,qcs615-gp-mnd
+          - const: qcom,sc7280-gp-mnd
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: PDM XO4 source clock
+      - description: PDM AHB bus clock for register access
+
+  clock-names:
+    items:
+      - const: pdm_clk
+      - const: ahb_clk
+
+  '#clock-cells':
+    const: 0
+
+  assigned-clocks:
+    maxItems: 1
+    description: Parent clock phandle used to set the input frequency.
+
+  assigned-clock-rates:
+    maxItems: 1
+    description: |
+      Rate for the parent clock in Hz.
+      Supported rates: 19200000, 9600000, 6400000, 4800000.
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - '#clock-cells'
+  - assigned-clocks
+  - assigned-clock-rates
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/qcom,gcc-sc7280.h>
+    gp_mn: clock-controller@88d3000 {
+        compatible = "qcom,sc7280-gp-mnd";
+        reg = <0x88d3000 0x1000>;
+        clocks = <&gcc GCC_PDM_XO4_CLK>,
+                 <&gcc GCC_PDM_AHB_CLK>;
+        clock-names = "pdm_clk", "ahb_clk";
+        pinctrl-0 = <&gp_mn_pin_active>;
+        pinctrl-names = "default";
+        assigned-clocks = <&gcc GCC_PDM_XO4_CLK>;
+        assigned-clock-rates = <4800000>;
+        #clock-cells = <0>;
+    };

-- 
2.34.1

[PATCH v2 02/12] dt-bindings: clock: qcom: Add PDM XO4 divider clock IDs

[Taniya Das]

Add clock IDs for the PDM XO4 divider sources on QCS615, QCS8300,
SA8775P, and SC7280. The corresponding GCC drivers use these IDs to
register the divider clocks.

Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
---
 include/dt-bindings/clock/qcom,gcc-sc7280.h  | 1 +
 include/dt-bindings/clock/qcom,qcs615-gcc.h  | 2 ++
 include/dt-bindings/clock/qcom,qcs8300-gcc.h | 1 +
 include/dt-bindings/clock/qcom,sa8775p-gcc.h | 1 +
 4 files changed, 5 insertions(+)

diff --git a/include/dt-bindings/clock/qcom,gcc-sc7280.h b/include/dt-bindings/clock/qcom,gcc-sc7280.h
index 3d5724b79bff18a858bdbb5c1654c5174e8cb23b..68dfd6616ce4b1c1e41f11603be639685301129f 100644
--- a/include/dt-bindings/clock/qcom,gcc-sc7280.h
+++ b/include/dt-bindings/clock/qcom,gcc-sc7280.h
@@ -192,6 +192,7 @@
 #define GCC_WPSS_RSCP_CLK				182
 #define GCC_EDP_CLKREF_EN				183
 #define GCC_SEC_CTRL_CLK_SRC				184
+#define GCC_PDM_XO4_DIV_CLK_SRC				185
 
 /* GCC power domains */
 #define GCC_PCIE_0_GDSC					0
diff --git a/include/dt-bindings/clock/qcom,qcs615-gcc.h b/include/dt-bindings/clock/qcom,qcs615-gcc.h
index 9704091636b87108a2a8c5ccc4a6b293829d8272..cddf21466a96a2990f1aaaf7c655fa6a4369ccbd 100644
--- a/include/dt-bindings/clock/qcom,qcs615-gcc.h
+++ b/include/dt-bindings/clock/qcom,qcs615-gcc.h
@@ -175,6 +175,8 @@
 #define GCC_UFS_PHY_PHY_AUX_HW_CTL_CLK				165
 #define GCC_UFS_PHY_UNIPRO_CORE_HW_CTL_CLK			166
 
+#define GCC_PDM_XO4_DIV_CLK_SRC					167
+
 /* GCC Resets */
 #define GCC_EMAC_BCR                                            0
 #define GCC_QUSB2PHY_PRIM_BCR                                   1
diff --git a/include/dt-bindings/clock/qcom,qcs8300-gcc.h b/include/dt-bindings/clock/qcom,qcs8300-gcc.h
index 3c674c7baaba91815b13450e647b41053bd7330d..cee26f50092044f4a0b4cead6f669f0ccf7343c0 100644
--- a/include/dt-bindings/clock/qcom,qcs8300-gcc.h
+++ b/include/dt-bindings/clock/qcom,qcs8300-gcc.h
@@ -196,6 +196,7 @@
 #define GCC_TSCSS_CNTR_CLK_SRC					186
 #define GCC_TSCSS_ETU_CLK					187
 #define GCC_TSCSS_GLOBAL_CNTR_CLK				188
+#define GCC_PDM_XO4_DIV_CLK_SRC				189
 
 /* GCC power domains */
 #define GCC_EMAC0_GDSC						0
diff --git a/include/dt-bindings/clock/qcom,sa8775p-gcc.h b/include/dt-bindings/clock/qcom,sa8775p-gcc.h
index 01f54234963d6a531926103f8658307d4e0662f2..e101c9b565d650495e63f5f97b3458375d0e85ec 100644
--- a/include/dt-bindings/clock/qcom,sa8775p-gcc.h
+++ b/include/dt-bindings/clock/qcom,sa8775p-gcc.h
@@ -257,6 +257,7 @@
 #define GCC_UFS_PHY_ICE_CORE_HW_CTL_CLK			246
 #define GCC_UFS_PHY_PHY_AUX_HW_CTL_CLK			247
 #define GCC_UFS_PHY_UNIPRO_CORE_HW_CTL_CLK		248
+#define GCC_PDM_XO4_DIV_CLK_SRC				249
 
 /* GCC resets */
 #define GCC_CAMERA_BCR					0

-- 
2.34.1

[PATCH v2 03/12] clk: qcom: Add a driver for PDM GP_MN fractional clock divider

[Taniya Das]

The PDM (Pulse Density Modulation) hardware block on Qualcomm SoCs
contains a GP_MN clock divider that produces a fractional output
frequency from a fixed input clock (typically TCXO4):

  Fout = Fin * (M / N)

The hardware encodes the period in the NDIV register as the 1's
complement of (N - M), and controls the duty cycle via a separate
DUTY register that counts the number of low-phase native clock
cycles over the period N.

Add a standalone platform driver for this block that uses
rational_best_approximation() to find the closest M/N pair within
the 9-bit M and 13-bit N hardware limits. Reject ratios which cannot
support a valid duty cycle, and program the MDIV, NDIV, and DUTY
registers via regmap. Implement determine_rate, set_rate,
recalc_rate, get_duty_cycle, and set_duty_cycle operations. The PDM
AHB bus clock is gated around every register access.

Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
---
 drivers/clk/qcom/Kconfig      |  15 ++
 drivers/clk/qcom/Makefile     |   1 +
 drivers/clk/qcom/clk-gp-mnd.c | 333 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 349 insertions(+)

diff --git a/drivers/clk/qcom/Kconfig b/drivers/clk/qcom/Kconfig
index 27d0ab24d50a4ca5587ed8d6085c4d6fcd57eb8c..d9f1df77b715b08a32c164a6d25d88fc545f59cb 100644
--- a/drivers/clk/qcom/Kconfig
+++ b/drivers/clk/qcom/Kconfig
@@ -2148,4 +2148,19 @@ config SM_VIDEOCC_8450
 	  SM8450 or SM8475 devices.
 	  Say Y if you want to support video devices and functionality such as
 	  video encode/decode.
+
+config QCOM_CLK_GP_MND
+	tristate "Qualcomm PDM GP_MN clock divider"
+	depends on ARM64 || COMPILE_TEST
+	help
+	  Support for the Qualcomm PDM GP_MN clock divider found in PDM
+	  (Pulse Density Modulation) hardware blocks.
+	  Given an input clock of frequency Fin (TCXO4), the output
+	  frequency is Fout = Fin * (M / N).  For every N input cycles
+	  the divider produces M output cycles.  D controls the duty
+	  cycle: it is the number of native clock cycles in which the
+	  GP_MN output is low, counted over 8192 native clock cycles.
+
+	  Say Y or M if you want to support GP_MN-based frequency and
+	  duty-cycle configuration on Qualcomm SoCs.
 endif
diff --git a/drivers/clk/qcom/Makefile b/drivers/clk/qcom/Makefile
index 6affb5073f269d18f1b78d6c7f92e14baeade1e5..4e8563be8e1b99aef48b227ff0c5dc04dc092d0a 100644
--- a/drivers/clk/qcom/Makefile
+++ b/drivers/clk/qcom/Makefile
@@ -227,6 +227,7 @@ obj-$(CONFIG_SM_VIDEOCC_8550) += videocc-sm8550.o
 obj-$(CONFIG_SM_VIDEOCC_8750) += videocc-sm8750.o
 obj-$(CONFIG_SM_VIDEOCC_MILOS) += videocc-milos.o
 obj-$(CONFIG_SPMI_PMIC_CLKDIV) += clk-spmi-pmic-div.o
+obj-$(CONFIG_QCOM_CLK_GP_MND) += clk-gp-mnd.o
 obj-$(CONFIG_KPSS_XCC) += kpss-xcc.o
 obj-$(CONFIG_QCOM_HFPLL) += hfpll.o
 obj-$(CONFIG_KRAITCC) += krait-cc.o
diff --git a/drivers/clk/qcom/clk-gp-mnd.c b/drivers/clk/qcom/clk-gp-mnd.c
new file mode 100644
index 0000000000000000000000000000000000000000..818726c02b615689928cf09b4b34f0889d4246d8
--- /dev/null
+++ b/drivers/clk/qcom/clk-gp-mnd.c
@@ -0,0 +1,333 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_clock.h>
+#include <linux/pm_runtime.h>
+#include <linux/rational.h>
+#include <linux/regmap.h>
+
+/*
+ * PDM GP_MND clock divider register offsets.
+ *
+ * The hardware computes:
+ *   Fout = Fin * (M / N)
+ *
+ * with duty cycle controlled by D, where M < D < (N - M).
+ *
+ * Register encoding:
+ *   MDIV  = M
+ *   NDIV  = ~(N - M)  [1's complement of (N - M), masked to N_REG_WIDTH bits]
+ *   DUTY  = D
+ */
+#define GP_MND_MDIV_REG		0x0
+#define GP_MND_NDIV_REG		0x4
+#define GP_MND_DUTY_REG		0x8
+
+#define GP_MND_M_WIDTH		9
+#define GP_MND_N_WIDTH		13
+
+#define GP_MND_MAX_M		GENMASK(GP_MND_M_WIDTH - 1, 0)
+#define GP_MND_MAX_N		GENMASK(GP_MND_N_WIDTH - 1, 0)
+
+/**
+ * struct clk_gp_mnd - GP_MND fractional clock divider
+ * @dev:		device for runtime PM
+ * @regmap:		register map for the PDM block
+ * @hw:			handle between common and hardware-specific interfaces
+ * @m_val:		M value (numerator)
+ * @n_val:		N value (period)
+ */
+struct clk_gp_mnd {
+	struct device		*dev;
+	struct regmap		*regmap;
+	struct clk_hw		hw;
+	unsigned int		m_val;
+	unsigned int		n_val;
+};
+
+#define to_clk_gp_mnd(_hw) container_of(_hw, struct clk_gp_mnd, hw)
+
+static int gp_mnd_clk_runtime_resume(struct clk_gp_mnd *gp)
+{
+	return pm_runtime_resume_and_get(gp->dev);
+}
+
+static void gp_mnd_clk_runtime_put(struct clk_gp_mnd *gp)
+{
+	pm_runtime_put(gp->dev);
+}
+
+static int gp_mnd_clk_determine_rate(struct clk_hw *hw,
+				     struct clk_rate_request *req)
+{
+	unsigned long m = 0, n = 0;
+
+	rational_best_approximation(req->rate, req->best_parent_rate,
+				    (unsigned long)GP_MND_MAX_M,
+				    (unsigned long)GP_MND_MAX_N,
+				    &m, &n);
+	if (!m || !n)
+		return -EINVAL;
+
+	if (n <= 2 * m + 1)
+		return -EINVAL;
+
+	req->rate = DIV_ROUND_CLOSEST_ULL((u64)req->best_parent_rate * m, n);
+
+	return 0;
+}
+
+static int gp_mnd_clk_set_rate(struct clk_hw *hw, unsigned long rate,
+			       unsigned long parent_rate)
+{
+	struct clk_gp_mnd *gp = to_clk_gp_mnd(hw);
+	unsigned long m = 0, n = 0;
+	unsigned int d_val, n_val;
+	int ret;
+
+	rational_best_approximation(rate, parent_rate,
+				    (unsigned long)GP_MND_MAX_M,
+				    (unsigned long)GP_MND_MAX_N,
+				    &m, &n);
+	if (!m || !n)
+		return -EINVAL;
+
+	if (n <= 2 * m + 1)
+		return -EINVAL;
+
+	ret = gp_mnd_clk_runtime_resume(gp);
+	if (ret)
+		return ret;
+
+	ret = regmap_write(gp->regmap, GP_MND_MDIV_REG, m);
+	if (ret)
+		goto err_runtime_put;
+
+	/* N divider holds the 1's complement of (N - M), N_WIDTH bits wide */
+	n_val = ~(n - m) & GP_MND_MAX_N;
+	ret = regmap_write(gp->regmap, GP_MND_NDIV_REG, n_val);
+	if (ret)
+		goto err_runtime_put;
+
+	/* Program the closest-to-50% duty cycle. */
+	d_val = n / 2;
+	ret = regmap_write(gp->regmap, GP_MND_DUTY_REG, d_val);
+	if (ret)
+		goto err_runtime_put;
+
+	gp->m_val = m;
+	gp->n_val = n;
+
+err_runtime_put:
+	gp_mnd_clk_runtime_put(gp);
+
+	return ret;
+}
+
+static unsigned long gp_mnd_clk_recalc_rate(struct clk_hw *hw,
+					    unsigned long parent_rate)
+{
+	struct clk_gp_mnd *gp = to_clk_gp_mnd(hw);
+	unsigned int m_val, n_val;
+	int ret;
+
+	ret = gp_mnd_clk_runtime_resume(gp);
+	if (ret)
+		return 0;
+
+	ret = regmap_read(gp->regmap, GP_MND_MDIV_REG, &m_val);
+	if (ret)
+		goto out_runtime_put;
+
+	m_val &= GP_MND_MAX_M;
+
+	ret = regmap_read(gp->regmap, GP_MND_NDIV_REG, &n_val);
+	if (ret)
+		goto out_runtime_put;
+
+	/* Reverse the 1's complement encoding: N = ~NDIV_REG + M */
+	n_val = (~n_val & GP_MND_MAX_N) + m_val;
+
+out_runtime_put:
+	gp_mnd_clk_runtime_put(gp);
+
+	if (ret)
+		return 0;
+
+	if (!n_val)
+		return 0;
+
+	gp->m_val = m_val;
+	gp->n_val = n_val;
+
+	return DIV_ROUND_CLOSEST_ULL((u64)parent_rate * m_val, n_val);
+}
+
+static int gp_mnd_clk_get_duty_cycle(struct clk_hw *hw, struct clk_duty *duty)
+{
+	struct clk_gp_mnd *gp = to_clk_gp_mnd(hw);
+	unsigned int d_val;
+	int ret;
+
+	if (!gp->n_val) {
+		duty->num = 1;
+		duty->den = 2;
+		return 0;
+	}
+
+	ret = gp_mnd_clk_runtime_resume(gp);
+	if (ret)
+		return ret;
+
+	ret = regmap_read(gp->regmap, GP_MND_DUTY_REG, &d_val);
+
+	gp_mnd_clk_runtime_put(gp);
+
+	if (ret)
+		return ret;
+
+	if (d_val >= gp->n_val)
+		return -EINVAL;
+
+	/* DUTY stores the low-phase count; report the high-phase duty cycle. */
+	duty->num = gp->n_val - d_val;
+	duty->den = gp->n_val;
+
+	return 0;
+}
+
+static int gp_mnd_clk_set_duty_cycle(struct clk_hw *hw, struct clk_duty *duty)
+{
+	struct clk_gp_mnd *gp = to_clk_gp_mnd(hw);
+	unsigned int d_val;
+	int ret;
+
+	if (!gp->n_val || !gp->m_val || !duty->den || duty->num > duty->den)
+		return -EINVAL;
+
+	/* D = (1 - duty) * N, giving the low-phase count */
+	d_val = DIV_ROUND_UP((u64)(duty->den - duty->num) * gp->n_val, duty->den);
+
+	/* Hardware constraint: M < D < (N - M) */
+	if (d_val <= gp->m_val || d_val >= (gp->n_val - gp->m_val))
+		return -EINVAL;
+
+	ret = gp_mnd_clk_runtime_resume(gp);
+	if (ret)
+		return ret;
+
+	ret = regmap_write(gp->regmap, GP_MND_DUTY_REG, d_val);
+
+	gp_mnd_clk_runtime_put(gp);
+
+	return ret;
+}
+
+static const struct clk_ops clk_gp_mnd_ops = {
+	.determine_rate	= gp_mnd_clk_determine_rate,
+	.set_rate	= gp_mnd_clk_set_rate,
+	.recalc_rate	= gp_mnd_clk_recalc_rate,
+	.get_duty_cycle	= gp_mnd_clk_get_duty_cycle,
+	.set_duty_cycle	= gp_mnd_clk_set_duty_cycle,
+};
+
+static const struct regmap_config gp_mnd_regmap_config = {
+	.reg_bits	= 32,
+	.reg_stride	= 4,
+	.val_bits	= 32,
+	.fast_io	= true,
+};
+
+static int clk_gp_mnd_probe(struct platform_device *pdev)
+{
+	struct clk_parent_data parent_data = { .index = 0 };
+	struct clk_init_data init = {
+		.name		= "gp_mn_clk",
+		.ops		= &clk_gp_mnd_ops,
+		.parent_data	= &parent_data,
+		.num_parents	= 1,
+		.flags		= CLK_GET_RATE_NOCACHE,
+	};
+	struct device *dev = &pdev->dev;
+	struct clk_gp_mnd *gp;
+	struct clk *clk;
+	void __iomem *base;
+	int ret;
+
+	gp = devm_kzalloc(dev, sizeof(*gp), GFP_KERNEL);
+	if (!gp)
+		return -ENOMEM;
+
+	gp->dev = dev;
+
+	ret = devm_pm_runtime_enable(dev);
+	if (ret)
+		return ret;
+
+	ret = devm_pm_clk_create(dev);
+	if (ret)
+		return ret;
+
+	ret = pm_clk_add(dev, "ahb_clk");
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to get ahb_clk\n");
+
+	clk = devm_clk_get(dev, "pdm_clk");
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	/* Set default rate if not already configured */
+	if (!clk_get_rate(clk)) {
+		ret = clk_set_rate(clk, 19200000);
+		if (ret)
+			dev_warn(dev, "failed to set default pdm_clk rate\n");
+	}
+
+	base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(base))
+		return dev_err_probe(dev, PTR_ERR(base),
+				     "failed to map PDM registers\n");
+
+	gp->regmap = devm_regmap_init_mmio(dev, base, &gp_mnd_regmap_config);
+	if (IS_ERR(gp->regmap))
+		return dev_err_probe(dev, PTR_ERR(gp->regmap),
+				     "failed to init regmap\n");
+
+	gp->hw.init = &init;
+
+	ret = devm_clk_hw_register(dev, &gp->hw);
+	if (ret)
+		return dev_err_probe(dev, ret,
+				     "failed to register gp_mnd clock\n");
+
+	return devm_of_clk_add_hw_provider(dev, of_clk_hw_simple_get, &gp->hw);
+}
+
+static const struct of_device_id clk_gp_mnd_match_table[] = {
+	{ .compatible = "qcom,sc7280-gp-mnd" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, clk_gp_mnd_match_table);
+
+static const struct dev_pm_ops clk_gp_mnd_pm_ops = {
+	SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL)
+};
+
+static struct platform_driver clk_gp_mnd_driver = {
+	.probe  = clk_gp_mnd_probe,
+	.driver = {
+		.name		= "qcom-clk-gp-mnd",
+		.of_match_table	= clk_gp_mnd_match_table,
+		.pm		= pm_ptr(&clk_gp_mnd_pm_ops),
+	},
+};
+module_platform_driver(clk_gp_mnd_driver);
+
+MODULE_DESCRIPTION("Qualcomm PDM GP_MND clock divider driver");
+MODULE_LICENSE("GPL");

-- 
2.34.1

[PATCH v2 04/12] clk: qcom: gcc: Add configurable PDM XO4 div clocks across targets

[Taniya Das]

Add PDM XO4 divider clocks and make the PDM XO4 branches propagate rate
requests to them on QCS615, QCS8300, SA8775P, and SC7280. This lets
GP_MND select the supported PDM source clock rates.

Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
---
 drivers/clk/qcom/gcc-qcs615.c  | 20 ++++++++++++++++++++
 drivers/clk/qcom/gcc-qcs8300.c | 20 ++++++++++++++++++++
 drivers/clk/qcom/gcc-sa8775p.c | 20 ++++++++++++++++++++
 drivers/clk/qcom/gcc-sc7280.c  | 20 ++++++++++++++++++++
 4 files changed, 80 insertions(+)

diff --git a/drivers/clk/qcom/gcc-qcs615.c b/drivers/clk/qcom/gcc-qcs615.c
index e096af7d82bf558bedf524eb2ca959f3e9e5c22e..9b558ea023ad62e6d465155e21c54376d7b99732 100644
--- a/drivers/clk/qcom/gcc-qcs615.c
+++ b/drivers/clk/qcom/gcc-qcs615.c
@@ -1654,6 +1654,20 @@ static struct clk_branch gcc_pdm_ahb_clk = {
 	},
 };
 
+static struct clk_regmap_div gcc_pdm_xo4_div_clk_src = {
+	.reg = 0x33028,
+	.shift = 0,
+	.width = 4,
+	.clkr.hw.init = &(const struct clk_init_data) {
+		.name = "gcc_pdm_xo4_div_clk_src",
+		.parent_data = &(const struct clk_parent_data){
+			.index = DT_BI_TCXO,
+		},
+		.num_parents = 1,
+		.ops = &clk_regmap_div_ops,
+	},
+};
+
 static struct clk_branch gcc_pdm_xo4_clk = {
 	.halt_reg = 0x33008,
 	.halt_check = BRANCH_HALT,
@@ -1662,6 +1676,11 @@ static struct clk_branch gcc_pdm_xo4_clk = {
 		.enable_mask = BIT(0),
 		.hw.init = &(const struct clk_init_data) {
 			.name = "gcc_pdm_xo4_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&gcc_pdm_xo4_div_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
 			.ops = &clk_branch2_ops,
 		},
 	},
@@ -2802,6 +2821,7 @@ static struct clk_regmap *gcc_qcs615_clocks[] = {
 	[GCC_PDM2_CLK_SRC] = &gcc_pdm2_clk_src.clkr,
 	[GCC_PDM_AHB_CLK] = &gcc_pdm_ahb_clk.clkr,
 	[GCC_PDM_XO4_CLK] = &gcc_pdm_xo4_clk.clkr,
+	[GCC_PDM_XO4_DIV_CLK_SRC] = &gcc_pdm_xo4_div_clk_src.clkr,
 	[GCC_PRNG_AHB_CLK] = &gcc_prng_ahb_clk.clkr,
 	[GCC_QMIP_CAMERA_NRT_AHB_CLK] = &gcc_qmip_camera_nrt_ahb_clk.clkr,
 	[GCC_QMIP_DISP_AHB_CLK] = &gcc_qmip_disp_ahb_clk.clkr,
diff --git a/drivers/clk/qcom/gcc-qcs8300.c b/drivers/clk/qcom/gcc-qcs8300.c
index 916617a001c854c1a0349c1793a427a2822acfab..4a152e95aa997bdcc7ec56a6ae96c61b3575cd88 100644
--- a/drivers/clk/qcom/gcc-qcs8300.c
+++ b/drivers/clk/qcom/gcc-qcs8300.c
@@ -2280,6 +2280,20 @@ static struct clk_branch gcc_pdm_ahb_clk = {
 	},
 };
 
+static struct clk_regmap_div gcc_pdm_xo4_div_clk_src = {
+	.reg = 0x3f028,
+	.shift = 0,
+	.width = 4,
+	.clkr.hw.init = &(const struct clk_init_data) {
+		.name = "gcc_pdm_xo4_div_clk_src",
+		.parent_data = &(const struct clk_parent_data){
+			.index = DT_BI_TCXO,
+		},
+		.num_parents = 1,
+		.ops = &clk_regmap_div_ops,
+	},
+};
+
 static struct clk_branch gcc_pdm_xo4_clk = {
 	.halt_reg = 0x3f008,
 	.halt_check = BRANCH_HALT,
@@ -2288,6 +2302,11 @@ static struct clk_branch gcc_pdm_xo4_clk = {
 		.enable_mask = BIT(0),
 		.hw.init = &(const struct clk_init_data) {
 			.name = "gcc_pdm_xo4_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&gcc_pdm_xo4_div_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
 			.ops = &clk_branch2_ops,
 		},
 	},
@@ -3501,6 +3520,7 @@ static struct clk_regmap *gcc_qcs8300_clocks[] = {
 	[GCC_PDM2_CLK_SRC] = &gcc_pdm2_clk_src.clkr,
 	[GCC_PDM_AHB_CLK] = &gcc_pdm_ahb_clk.clkr,
 	[GCC_PDM_XO4_CLK] = &gcc_pdm_xo4_clk.clkr,
+	[GCC_PDM_XO4_DIV_CLK_SRC] = &gcc_pdm_xo4_div_clk_src.clkr,
 	[GCC_QMIP_CAMERA_NRT_AHB_CLK] = &gcc_qmip_camera_nrt_ahb_clk.clkr,
 	[GCC_QMIP_CAMERA_RT_AHB_CLK] = &gcc_qmip_camera_rt_ahb_clk.clkr,
 	[GCC_QMIP_DISP_AHB_CLK] = &gcc_qmip_disp_ahb_clk.clkr,
diff --git a/drivers/clk/qcom/gcc-sa8775p.c b/drivers/clk/qcom/gcc-sa8775p.c
index 0e02af686614162dd7d5d9ab9f3a20c390ed0512..5ed3ec74b210807813f97120a4a19773f3f67d0d 100644
--- a/drivers/clk/qcom/gcc-sa8775p.c
+++ b/drivers/clk/qcom/gcc-sa8775p.c
@@ -2712,6 +2712,20 @@ static struct clk_branch gcc_pdm_ahb_clk = {
 	},
 };
 
+static struct clk_regmap_div gcc_pdm_xo4_div_clk_src = {
+	.reg = 0x3f028,
+	.shift = 0,
+	.width = 4,
+	.clkr.hw.init = &(const struct clk_init_data) {
+		.name = "gcc_pdm_xo4_div_clk_src",
+		.parent_data = &(const struct clk_parent_data){
+			.index = DT_BI_TCXO,
+		},
+		.num_parents = 1,
+		.ops = &clk_regmap_div_ops,
+	},
+};
+
 static struct clk_branch gcc_pdm_xo4_clk = {
 	.halt_reg = 0x3f008,
 	.halt_check = BRANCH_HALT,
@@ -2720,6 +2734,11 @@ static struct clk_branch gcc_pdm_xo4_clk = {
 		.enable_mask = BIT(0),
 		.hw.init = &(const struct clk_init_data){
 			.name = "gcc_pdm_xo4_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&gcc_pdm_xo4_div_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
 			.ops = &clk_branch2_ops,
 		},
 	},
@@ -4406,6 +4425,7 @@ static struct clk_regmap *gcc_sa8775p_clocks[] = {
 	[GCC_PDM2_CLK_SRC] = &gcc_pdm2_clk_src.clkr,
 	[GCC_PDM_AHB_CLK] = &gcc_pdm_ahb_clk.clkr,
 	[GCC_PDM_XO4_CLK] = &gcc_pdm_xo4_clk.clkr,
+	[GCC_PDM_XO4_DIV_CLK_SRC] = &gcc_pdm_xo4_div_clk_src.clkr,
 	[GCC_QMIP_CAMERA_NRT_AHB_CLK] = &gcc_qmip_camera_nrt_ahb_clk.clkr,
 	[GCC_QMIP_CAMERA_RT_AHB_CLK] = &gcc_qmip_camera_rt_ahb_clk.clkr,
 	[GCC_QMIP_DISP1_AHB_CLK] = &gcc_qmip_disp1_ahb_clk.clkr,
diff --git a/drivers/clk/qcom/gcc-sc7280.c b/drivers/clk/qcom/gcc-sc7280.c
index 78399993cdcee225d2f21f39844b056193bdfca3..dc7a855be0234f6135d461175099862f2d486d9a 100644
--- a/drivers/clk/qcom/gcc-sc7280.c
+++ b/drivers/clk/qcom/gcc-sc7280.c
@@ -1913,6 +1913,20 @@ static struct clk_branch gcc_pdm_ahb_clk = {
 	},
 };
 
+static struct clk_regmap_div gcc_pdm_xo4_div_clk_src = {
+	.reg = 0x33028,
+	.shift = 0,
+	.width = 4,
+	.clkr.hw.init = &(const struct clk_init_data) {
+		.name = "gcc_pdm_xo4_div_clk_src",
+		.parent_data = &(const struct clk_parent_data){
+			.fw_name = "bi_tcxo",
+		},
+		.num_parents = 1,
+		.ops = &clk_regmap_div_ops,
+	},
+};
+
 static struct clk_branch gcc_pdm_xo4_clk = {
 	.halt_reg = 0x33008,
 	.halt_check = BRANCH_HALT,
@@ -1921,6 +1935,11 @@ static struct clk_branch gcc_pdm_xo4_clk = {
 		.enable_mask = BIT(0),
 		.hw.init = &(struct clk_init_data){
 			.name = "gcc_pdm_xo4_clk",
+			.parent_hws = (const struct clk_hw*[]) {
+				&gcc_pdm_xo4_div_clk_src.clkr.hw,
+			},
+			.num_parents = 1,
+			.flags = CLK_SET_RATE_PARENT,
 			.ops = &clk_branch2_ops,
 		},
 	},
@@ -3250,6 +3269,7 @@ static struct clk_regmap *gcc_sc7280_clocks[] = {
 	[GCC_PDM2_CLK_SRC] = &gcc_pdm2_clk_src.clkr,
 	[GCC_PDM_AHB_CLK] = &gcc_pdm_ahb_clk.clkr,
 	[GCC_PDM_XO4_CLK] = &gcc_pdm_xo4_clk.clkr,
+	[GCC_PDM_XO4_DIV_CLK_SRC] = &gcc_pdm_xo4_div_clk_src.clkr,
 	[GCC_QMIP_CAMERA_NRT_AHB_CLK] = &gcc_qmip_camera_nrt_ahb_clk.clkr,
 	[GCC_QMIP_CAMERA_RT_AHB_CLK] = &gcc_qmip_camera_rt_ahb_clk.clkr,
 	[GCC_QMIP_DISP_AHB_CLK] = &gcc_qmip_disp_ahb_clk.clkr,

-- 
2.34.1

[PATCH v2 05/12] pinctrl: qcom: qcs8300: Add gp_mn mux function

[Taniya Das]

Add the gp_mn pin mux function on gpio32 of QCS8300. This exposes the
GP M/N divider clock output on the dedicated GPIO pin.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
---
 drivers/pinctrl/qcom/pinctrl-qcs8300.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-qcs8300.c b/drivers/pinctrl/qcom/pinctrl-qcs8300.c
index fec86818c51188a0949e268382fb0c5de3f66f1a..349369fcdf18342b27067b91414eacbe378224e7 100644
--- a/drivers/pinctrl/qcom/pinctrl-qcs8300.c
+++ b/drivers/pinctrl/qcom/pinctrl-qcs8300.c
@@ -424,6 +424,7 @@ enum qcs8300_functions {
 	msm_mux_gcc_gp3,
 	msm_mux_gcc_gp4,
 	msm_mux_gcc_gp5,
+	msm_mux_gp_mn,
 	msm_mux_hs0_mi2s,
 	msm_mux_hs1_mi2s,
 	msm_mux_hs2_mi2s,
@@ -651,6 +652,10 @@ static const char *const gcc_gp5_groups[] = {
 	"gpio76", "gpio77",
 };
 
+static const char *const gp_mn_groups[] = {
+	"gpio32",
+};
+
 static const char * const hs0_mi2s_groups[] = {
 	"gpio106", "gpio107", "gpio108", "gpio109",
 };
@@ -955,6 +960,7 @@ static const struct pinfunction qcs8300_functions[] = {
 	MSM_PIN_FUNCTION(gcc_gp3),
 	MSM_PIN_FUNCTION(gcc_gp4),
 	MSM_PIN_FUNCTION(gcc_gp5),
+	MSM_PIN_FUNCTION(gp_mn),
 	MSM_PIN_FUNCTION(hs0_mi2s),
 	MSM_PIN_FUNCTION(hs1_mi2s),
 	MSM_PIN_FUNCTION(hs2_mi2s),
@@ -1062,7 +1068,8 @@ static const struct msm_pingroup qcs8300_groups[] = {
 	[30] = PINGROUP(30, qup0_se4, cci_i2c_scl, cci_async, emac0_ptp_pps,
 			tgu_ch3, _, _, _, _, _, _),
 	[31] = PINGROUP(31, qup0_se4, cci_i2c_sda, cci_async, emac0_ptp_aux, _, _, _, _, _, _, _),
-	[32] = PINGROUP(32, qup0_se4, cci_i2c_scl, emac0_ptp_aux, mdp_vsync, _, _, _, _, _, _, _),
+	[32] = PINGROUP(32, qup0_se4, cci_i2c_scl, emac0_ptp_aux, mdp_vsync, gp_mn, _, _, _, _,
+			_, _),
 	[33] = PINGROUP(33, qup0_se2, qdss_gpio, _, _, _, _, _, _, _, _, _),
 	[34] = PINGROUP(34, qup0_se2, qdss_gpio, _, _, _, _, _, _, _, _, _),
 	[35] = PINGROUP(35, qup0_se2, gcc_gp1, _, _, _, _, _, _, _, _, _),

-- 
2.34.1

[PATCH v2 06/12] pinctrl: qcom: sa8775p: Add gp_mn mux function

[Taniya Das]

Add the gp_mn pin mux function on gpio35 of SA8775P. This exposes the
GP M/N divider clock output on the dedicated GPIO pin.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
---
 drivers/pinctrl/qcom/pinctrl-sa8775p.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-sa8775p.c b/drivers/pinctrl/qcom/pinctrl-sa8775p.c
index 5dbaa50cbff008a2605876eb329496d305735700..d299f47a0bd4ab1a0cd0e553ba50f9ec1e035686 100644
--- a/drivers/pinctrl/qcom/pinctrl-sa8775p.c
+++ b/drivers/pinctrl/qcom/pinctrl-sa8775p.c
@@ -480,6 +480,7 @@ enum sa8775p_functions {
 	msm_mux_gcc_gp3,
 	msm_mux_gcc_gp4,
 	msm_mux_gcc_gp5,
+	msm_mux_gp_mn,
 	msm_mux_hs0_mi2s,
 	msm_mux_hs1_mi2s,
 	msm_mux_hs2_mi2s,
@@ -828,6 +829,10 @@ static const char * const gcc_gp5_groups[] = {
 	"gpio34", "gpio42",
 };
 
+static const char * const gp_mn_groups[] = {
+	"gpio35",
+};
+
 static const char * const hs0_mi2s_groups[] = {
 	"gpio114", "gpio115", "gpio116", "gpio117",
 };
@@ -1230,6 +1235,7 @@ static const struct pinfunction sa8775p_functions[] = {
 	MSM_PIN_FUNCTION(gcc_gp3),
 	MSM_PIN_FUNCTION(gcc_gp4),
 	MSM_PIN_FUNCTION(gcc_gp5),
+	MSM_PIN_FUNCTION(gp_mn),
 	MSM_PIN_FUNCTION(hs0_mi2s),
 	MSM_PIN_FUNCTION(hs1_mi2s),
 	MSM_PIN_FUNCTION(hs2_mi2s),
@@ -1361,7 +1367,7 @@ static const struct msm_pingroup sa8775p_groups[] = {
 	[32] = PINGROUP(32, qup0_se4, phase_flag, _, _, _, _, _, _, _),
 	[33] = PINGROUP(33, qup0_se4, gcc_gp4, _, ddr_pxi0, _, _, _, _,	_),
 	[34] = PINGROUP(34, qup0_se4, gcc_gp5, _, ddr_pxi0, _, _, _, _,	_),
-	[35] = PINGROUP(35, qup0_se4, phase_flag, _, _, _, _, _, _, _),
+	[35] = PINGROUP(35, qup0_se4, phase_flag, gp_mn, _, _, _, _, _, _),
 	[36] = PINGROUP(36, qup0_se2, qup0_se5, phase_flag, tgu_ch2, _, _, _, _, _),
 	[37] = PINGROUP(37, qup0_se2, qup0_se5, phase_flag, tgu_ch3, _, _, _, _, _),
 	[38] = PINGROUP(38, qup0_se5, qup0_se2, qdss_cti, phase_flag, tgu_ch4, _, _, _, _),

-- 
2.34.1

[PATCH v2 07/12] pinctrl: qcom: sc7280: Add gp_mn mux function

[Taniya Das]

Add the gp_mn pin mux function on gpio60 of SC7280. This exposes the
GP M/N divider clock output on the dedicated GPIO pin.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
---
 drivers/pinctrl/qcom/pinctrl-sc7280.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-sc7280.c b/drivers/pinctrl/qcom/pinctrl-sc7280.c
index bb32a56649df6faf1aecd470435d74558c20db27..5e210b399f88f5beb68e511bca9c0dd93a1b75dc 100644
--- a/drivers/pinctrl/qcom/pinctrl-sc7280.c
+++ b/drivers/pinctrl/qcom/pinctrl-sc7280.c
@@ -515,6 +515,7 @@ enum sc7280_functions {
 	msm_mux_gcc_gp1,
 	msm_mux_gcc_gp2,
 	msm_mux_gcc_gp3,
+	msm_mux_gp_mn,
 	msm_mux_gpio,
 	msm_mux_host2wlan_sol,
 	msm_mux_ibi_i3c,
@@ -788,6 +789,10 @@ static const char * const gcc_gp2_groups[] = {
 static const char * const gcc_gp3_groups[] = {
 	"gpio78", "gpio107",
 };
+
+static const char *const gp_mn_groups[] = {
+	"gpio60",
+};
 static const char * const host2wlan_sol_groups[] = {
 	"gpio26",
 };
@@ -1154,6 +1159,7 @@ static const struct pinfunction sc7280_functions[] = {
 	MSM_PIN_FUNCTION(gcc_gp1),
 	MSM_PIN_FUNCTION(gcc_gp2),
 	MSM_PIN_FUNCTION(gcc_gp3),
+	MSM_PIN_FUNCTION(gp_mn),
 	MSM_GPIO_PIN_FUNCTION(gpio),
 	MSM_PIN_FUNCTION(host2wlan_sol),
 	MSM_PIN_FUNCTION(ibi_i3c),
@@ -1325,7 +1331,7 @@ static const struct msm_pingroup sc7280_groups[] = {
 	[57] = PINGROUP(57, qup16, ddr_bist, phase_flag, _, _, _, _, _, _),
 	[58] = PINGROUP(58, qup16, ddr_bist, phase_flag, qdss, _, _, _, _, _),
 	[59] = PINGROUP(59, qup16, ddr_bist, phase_flag, qdss, _, _, _, _, _),
-	[60] = PINGROUP(60, qup17, edp_hot, _, phase_flag, _, _, _, _, _),
+	[60] = PINGROUP(60, qup17, edp_hot, gp_mn, phase_flag, _, _, _, _, _),
 	[61] = PINGROUP(61, qup17, sd_write, phase_flag, tsense_pwm1, tsense_pwm2, _, _, _, _),
 	[62] = PINGROUP(62, qup17, qup16, phase_flag, _, _, _, _, _, _),
 	[63] = PINGROUP(63, qup17, qup16, phase_flag, _, _, _, _, _, _),

-- 
2.34.1

[PATCH v2 08/12] pinctrl: qcom: qcs615: Add gp_mn mux function

[Taniya Das]

Add the gp_mn pin mux function on gpio29 of QCS615. This exposes the
GP M/N divider clock output on the dedicated GPIO pin.

Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
---
 drivers/pinctrl/qcom/pinctrl-qcs615.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/pinctrl/qcom/pinctrl-qcs615.c b/drivers/pinctrl/qcom/pinctrl-qcs615.c
index 0e7df184122b5b94756a233a009ec0dd3675816f..169323635d39a7c3441560feb002e9e03a577515 100644
--- a/drivers/pinctrl/qcom/pinctrl-qcs615.c
+++ b/drivers/pinctrl/qcom/pinctrl-qcs615.c
@@ -404,6 +404,7 @@ enum qcs615_functions {
 	msm_mux_emac_phy_intr,
 	msm_mux_forced_usb,
 	msm_mux_gcc_gp,
+	msm_mux_gp_mn,
 	msm_mux_gp_pdm,
 	msm_mux_gps_tx,
 	msm_mux_hs0_mi2s,
@@ -581,6 +582,10 @@ static const char *const gcc_gp_groups[] = {
 	"gpio59", "gpio78",
 };
 
+static const char *const gp_mn_groups[] = {
+	"gpio29",
+};
+
 static const char *const gp_pdm_groups[] = {
 	"gpio8", "gpio54", "gpio63", "gpio66",
 	"gpio79", "gpio95",
@@ -840,6 +845,7 @@ static const struct pinfunction qcs615_functions[] = {
 	MSM_PIN_FUNCTION(emac_phy_intr),
 	MSM_PIN_FUNCTION(forced_usb),
 	MSM_PIN_FUNCTION(gcc_gp),
+	MSM_PIN_FUNCTION(gp_mn),
 	MSM_PIN_FUNCTION(gp_pdm),
 	MSM_PIN_FUNCTION(gps_tx),
 	MSM_PIN_FUNCTION(hs0_mi2s),
@@ -929,7 +935,7 @@ static const struct msm_pingroup qcs615_groups[] = {
 	[26] = PINGROUP(26, EAST, cci_async, hs1_mi2s, jitter_bist, _, _, _, _, _, _),
 	[27] = PINGROUP(27, EAST, hs1_mi2s, pll_bist, _, _, _, _, _, _, _),
 	[28] = PINGROUP(28, EAST, cam_mclk, agera_pll, qdss_gpio, _, _, _, _, _, _),
-	[29] = PINGROUP(29, EAST, cam_mclk, _, qdss_gpio, atest_tsens, _, _, _, _, _),
+	[29] = PINGROUP(29, EAST, cam_mclk, gp_mn, qdss_gpio, atest_tsens, _, _, _, _, _),
 	[30] = PINGROUP(30, EAST, cam_mclk, qdss_gpio, _, _, _, _, _, _, _),
 	[31] = PINGROUP(31, EAST, cam_mclk, _, qdss_gpio, _, _, _, _, _, _),
 	[32] = PINGROUP(32, EAST, cci_i2c, _, qdss_gpio, _, _, _, _, _, _),

-- 
2.34.1

[PATCH v2 09/12] arm64: dts: qcom: qcs8300: Add GP M/N clock controller

[Taniya Das]

Add the GP M/N clock controller and its pin configuration for QCS8300.
The controller uses the PDM XO4 and AHB clocks from GCC and routes its
output to gpio32.

Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/monaco.dtsi | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/monaco.dtsi b/arch/arm64/boot/dts/qcom/monaco.dtsi
index 35fbee63d4c652005dae9b93bbb8f6a28b48be3b..e122f70eaf20c65df5854e644887ad16da94a7ec 100644
--- a/arch/arm64/boot/dts/qcom/monaco.dtsi
+++ b/arch/arm64/boot/dts/qcom/monaco.dtsi
@@ -4891,6 +4891,20 @@ sdhc_ice: crypto@87c8000 {
 			power-domains = <&rpmhpd RPMHPD_CX>;
 		};
 
+		gp_mn: clock-controller@88d3000 {
+			compatible = "qcom,qcs8300-gp-mnd", "qcom,sc7280-gp-mnd";
+			reg = <0x0 0x088d3000 0x0 0x1000>;
+			clocks = <&gcc GCC_PDM_XO4_CLK>,
+				 <&gcc GCC_PDM_AHB_CLK>;
+			clock-names = "pdm_clk", "ahb_clk";
+			#clock-cells = <0>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&gp_mn_active>;
+			assigned-clocks = <&gcc GCC_PDM_XO4_CLK>;
+			assigned-clock-rates = <4800000>;
+			status = "disabled";
+		};
+
 		usb_1_hsphy: phy@8904000 {
 			compatible = "qcom,qcs8300-usb-hs-phy",
 				     "qcom,usb-snps-hs-7nm-phy";
@@ -6457,6 +6471,13 @@ dp_hot_plug_det: dp-hot-plug-det-state {
 				bias-disable;
 			};
 
+			gp_mn_active: gp-mn-active-state {
+				pins = "gpio32";
+				function = "gp_mn";
+				drive-strength = <2>;
+				bias-disable;
+			};
+
 			hs0_mi2s_active: hs0-mi2s-active-state {
 				pins = "gpio106", "gpio107", "gpio108", "gpio109";
 				function = "hs0_mi2s";

-- 
2.34.1

[PATCH v2 10/12] arm64: dts: qcom: sa8775p: Add GP M/N clock controller

[Taniya Das]

Add the GP M/N clock controller and its pin configuration for SA8775P.
The controller uses the PDM XO4 and AHB clocks from GCC and routes its
output to gpio35.

Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/lemans.dtsi | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/lemans.dtsi b/arch/arm64/boot/dts/qcom/lemans.dtsi
index 1fdb72fa5518446ba2ea582e8362e86bba75c379..4132d288e3a16ab0a6d8b6d0816e85671bd25c73 100644
--- a/arch/arm64/boot/dts/qcom/lemans.dtsi
+++ b/arch/arm64/boot/dts/qcom/lemans.dtsi
@@ -4348,6 +4348,20 @@ opp-384000000 {
 			};
 		};
 
+		gp_mn: clock-controller@88d3000 {
+			compatible = "qcom,sa8775p-gp-mnd", "qcom,sc7280-gp-mnd";
+			reg = <0x0 0x088d3000 0x0 0x1000>;
+			clocks = <&gcc GCC_PDM_XO4_CLK>,
+				 <&gcc GCC_PDM_AHB_CLK>;
+			clock-names = "pdm_clk", "ahb_clk";
+			#clock-cells = <0>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&gp_mn_active>;
+			assigned-clocks = <&gcc GCC_PDM_XO4_CLK>;
+			assigned-clock-rates = <4800000>;
+			status = "disabled";
+		};
+
 		usb_0_hsphy: phy@88e4000 {
 			compatible = "qcom,sa8775p-usb-hs-phy",
 				     "qcom,usb-snps-hs-5nm-phy";
@@ -6017,6 +6031,13 @@ dp1_hot_plug_det: dp1-hot-plug-det-state {
 				bias-disable;
 			};
 
+			gp_mn_active: gp-mn-active-state {
+				pins = "gpio35";
+				function = "gp_mn";
+				drive-strength = <2>;
+				bias-disable;
+			};
+
 			hs0_mi2s_active: hs0-mi2s-active-state {
 				pins = "gpio114", "gpio115", "gpio116", "gpio117";
 				function = "hs0_mi2s";

-- 
2.34.1

[PATCH v2 11/12] arm64: dts: qcom: sc7280: Add GP M/N clock controller

[Taniya Das]

Add the GP M/N clock controller and its pin configuration for SC7280.
The controller uses the PDM XO4 and AHB clocks from GCC and routes its
output to gpio60.

Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/kodiak.dtsi | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/kodiak.dtsi b/arch/arm64/boot/dts/qcom/kodiak.dtsi
index 8c7523602d2719775b8f5c6a8cef138a93292721..de27a051ee3b0e9046ff97b8e6fe0164985d7b17 100644
--- a/arch/arm64/boot/dts/qcom/kodiak.dtsi
+++ b/arch/arm64/boot/dts/qcom/kodiak.dtsi
@@ -4442,6 +4442,20 @@ usb2_role_switch: endpoint {
 			};
 		};
 
+		gp_mn: clock-controller@88d3000 {
+			compatible = "qcom,sc7280-gp-mnd";
+			reg = <0x0 0x088d3000 0x0 0x1000>;
+			clocks = <&gcc GCC_PDM_XO4_CLK>,
+				 <&gcc GCC_PDM_AHB_CLK>;
+			clock-names = "pdm_clk", "ahb_clk";
+			#clock-cells = <0>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&gp_mn_active>;
+			assigned-clocks = <&gcc GCC_PDM_XO4_CLK>;
+			assigned-clock-rates = <4800000>;
+			status = "disabled";
+		};
+
 		qspi: spi@88dc000 {
 			compatible = "qcom,sc7280-qspi", "qcom,qspi-v1";
 			reg = <0 0x088dc000 0 0x1000>;
@@ -6653,6 +6667,13 @@ mi2s0_sclk: mi2s0-sclk-state {
 				function = "mi2s0_sck";
 			};
 
+			gp_mn_active: gp-mn-active-state {
+				pins = "gpio60";
+				function = "gp_mn";
+				drive-strength = <2>;
+				bias-disable;
+			};
+
 			mi2s0_data0: mi2s0-data0-state {
 				pins = "gpio98";
 				function = "mi2s0_data0";

-- 
2.34.1

[PATCH v2 12/12] arm64: dts: qcom: qcs615: Add GP M/N clock controller

[Taniya Das]

Add the GP M/N clock controller and its pin configuration for QCS615.
The controller uses the PDM XO4 and AHB clocks from GCC and routes its
output to gpio29.

Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/talos.dtsi | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/talos.dtsi b/arch/arm64/boot/dts/qcom/talos.dtsi
index 8ed6f2755705c38796698747dfe7bba1afd1859e..c415e782804ca8c9d09670cb8c8cd2353d796b23 100644
--- a/arch/arm64/boot/dts/qcom/talos.dtsi
+++ b/arch/arm64/boot/dts/qcom/talos.dtsi
@@ -1611,6 +1611,13 @@ cam_mclk1_default: cam-mclk1-default-state {
 				bias-disable;
 			};
 
+			gp_mn_active: gp-mn-active-state {
+				pins = "gpio29";
+				function = "gp_mn";
+				drive-strength = <2>;
+				bias-disable;
+			};
+
 			cam_mclk2_default: cam-mclk2-default-state {
 				pins = "gpio30";
 				function = "cam_mclk";
@@ -4028,6 +4035,20 @@ opp-202000000 {
 			};
 		};
 
+		gp_mn: clock-controller@88d3000 {
+			compatible = "qcom,qcs615-gp-mnd", "qcom,sc7280-gp-mnd";
+			reg = <0x0 0x088d3000 0x0 0x1000>;
+			clocks = <&gcc GCC_PDM_XO4_CLK>,
+				 <&gcc GCC_PDM_AHB_CLK>;
+			clock-names = "pdm_clk", "ahb_clk";
+			#clock-cells = <0>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&gp_mn_active>;
+			assigned-clocks = <&gcc GCC_PDM_XO4_CLK>;
+			assigned-clock-rates = <19200000>;
+			status = "disabled";
+		};
+
 		qspi: spi@88df000 {
 			compatible = "qcom,qcs615-qspi",
 				     "qcom,qspi-v1";

-- 
2.34.1

Re: [PATCH v2 04/12] clk: qcom: gcc: Add configurable PDM XO4 div clocks across targets

[Abel Vesa]

On 26-10-26 16:59:30, Taniya Das wrote:
> Add PDM XO4 divider clocks and make the PDM XO4 branches propagate rate
> requests to them on QCS615, QCS8300, SA8775P, and SC7280. This lets
> GP_MND select the supported PDM source clock rates.
> 
> Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>

Reviewed-by: Abel Vesa <abel.vesa@oss.qualcomm.com>

Re: [PATCH v2 12/12] arm64: dts: qcom: qcs615: Add GP M/N clock controller

[Abel Vesa]

On 26-10-26 16:59:38, Taniya Das wrote:
> Add the GP M/N clock controller and its pin configuration for QCS615.
> The controller uses the PDM XO4 and AHB clocks from GCC and routes its
> output to gpio29.
> 
> Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/talos.dtsi | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/talos.dtsi b/arch/arm64/boot/dts/qcom/talos.dtsi
> index 8ed6f2755705c38796698747dfe7bba1afd1859e..c415e782804ca8c9d09670cb8c8cd2353d796b23 100644
> --- a/arch/arm64/boot/dts/qcom/talos.dtsi
> +++ b/arch/arm64/boot/dts/qcom/talos.dtsi
> @@ -1611,6 +1611,13 @@ cam_mclk1_default: cam-mclk1-default-state {
>  				bias-disable;
>  			};
>  
> +			gp_mn_active: gp-mn-active-state {
> +				pins = "gpio29";
> +				function = "gp_mn";
> +				drive-strength = <2>;
> +				bias-disable;
> +			};
> +
>  			cam_mclk2_default: cam-mclk2-default-state {
>  				pins = "gpio30";
>  				function = "cam_mclk";
> @@ -4028,6 +4035,20 @@ opp-202000000 {
>  			};
>  		};
>  
> +		gp_mn: clock-controller@88d3000 {
> +			compatible = "qcom,qcs615-gp-mnd", "qcom,sc7280-gp-mnd";
> +			reg = <0x0 0x088d3000 0x0 0x1000>;
> +			clocks = <&gcc GCC_PDM_XO4_CLK>,
> +				 <&gcc GCC_PDM_AHB_CLK>;
> +			clock-names = "pdm_clk", "ahb_clk";
> +			#clock-cells = <0>;
> +			pinctrl-names = "default";
> +			pinctrl-0 = <&gp_mn_active>;

pinctrl-0
pinctrl-names

> +			assigned-clocks = <&gcc GCC_PDM_XO4_CLK>;
> +			assigned-clock-rates = <19200000>;
> +			status = "disabled";
> +		};
> +
>  		qspi: spi@88df000 {
>  			compatible = "qcom,qcs615-qspi",
>  				     "qcom,qspi-v1";
> 
> -- 
> 2.34.1
> 

Re: [PATCH v2 11/12] arm64: dts: qcom: sc7280: Add GP M/N clock controller

[Abel Vesa]

On 26-10-26 16:59:37, Taniya Das wrote:
> Add the GP M/N clock controller and its pin configuration for SC7280.
> The controller uses the PDM XO4 and AHB clocks from GCC and routes its
> output to gpio60.
> 
> Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
> ---
>  arch/arm64/boot/dts/qcom/kodiak.dtsi | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/kodiak.dtsi b/arch/arm64/boot/dts/qcom/kodiak.dtsi
> index 8c7523602d2719775b8f5c6a8cef138a93292721..de27a051ee3b0e9046ff97b8e6fe0164985d7b17 100644
> --- a/arch/arm64/boot/dts/qcom/kodiak.dtsi
> +++ b/arch/arm64/boot/dts/qcom/kodiak.dtsi
> @@ -4442,6 +4442,20 @@ usb2_role_switch: endpoint {
>  			};
>  		};
>  
> +		gp_mn: clock-controller@88d3000 {
> +			compatible = "qcom,sc7280-gp-mnd";
> +			reg = <0x0 0x088d3000 0x0 0x1000>;
> +			clocks = <&gcc GCC_PDM_XO4_CLK>,
> +				 <&gcc GCC_PDM_AHB_CLK>;
> +			clock-names = "pdm_clk", "ahb_clk";
> +			#clock-cells = <0>;
> +			pinctrl-names = "default";
> +			pinctrl-0 = <&gp_mn_active>;

pinctrl-0
pinctrl-names

Same for all other patches.

> +			assigned-clocks = <&gcc GCC_PDM_XO4_CLK>;
> +			assigned-clock-rates = <4800000>;
> +			status = "disabled";
> +		};
> +
>  		qspi: spi@88dc000 {
>  			compatible = "qcom,sc7280-qspi", "qcom,qspi-v1";
>  			reg = <0 0x088dc000 0 0x1000>;
> @@ -6653,6 +6667,13 @@ mi2s0_sclk: mi2s0-sclk-state {
>  				function = "mi2s0_sck";
>  			};
>  
> +			gp_mn_active: gp-mn-active-state {
> +				pins = "gpio60";
> +				function = "gp_mn";
> +				drive-strength = <2>;
> +				bias-disable;
> +			};
> +
>  			mi2s0_data0: mi2s0-data0-state {
>  				pins = "gpio98";
>  				function = "mi2s0_data0";
> 
> -- 
> 2.34.1
> 

Re: [PATCH v2 01/12] dt-bindings: clock: qcom: Add bindings for PDM GP_MN clock divider

[Krzysztof Kozlowski]

On Mon, Oct 26, 2026 at 04:59:27PM +0530, Taniya Das wrote:
> Add device tree bindings for the Qualcomm Peripheral Web's PDM GP_MN
> clock divider. The hardware generates a fractional output frequency
> from a fixed input clock (typically TCXO4) using the relation
> Fout = Fin * (M / N), with duty cycle controlled by a separate D
> register. The clock output is routed over a gpio controlled pin.
> 
> Signed-off-by: Taniya Das <taniya.das@oss.qualcomm.com>
> ---
>  .../devicetree/bindings/clock/qcom,clk-gp-mnd.yaml | 98 ++++++++++++++++++++++
>  1 file changed, 98 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/clock/qcom,clk-gp-mnd.yaml b/Documentation/devicetree/bindings/clock/qcom,clk-gp-mnd.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..8141f392c5d70acfc42cf1ff4b1722e1eff23afa
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/qcom,clk-gp-mnd.yaml

Use fallback as filename, so qcom,sc7280-gp-mnd.yaml

> @@ -0,0 +1,98 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/qcom,clk-gp-mnd.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm Peripheral Web's PDM GP_MN Clock Divider
> +
> +maintainers:
> +  - Taniya Das <taniya.das@oss.qualcomm.com>
> +
> +description: |
> +  The Peripheral Web's PDM GP_MN clock divider receives an input clock
> +  (TCXO4) with frequency Fin and generates an output clock with
> +  frequency Fout = Fin * (M / N) and a duty cycle controlled by D
> +  and routed over a gpio pin.
> +
> +  The divider is configured using three registers:
> +
> +  - GP_MN_CLK_MDIV: holds the M value.
> +  - GP_MN_CLK_NDIV: holds the ones complement of (N - M).
> +  - GP_MN_CLK_DUTY: holds the D value.
> +
> +  For every N input clock cycles the GP_MN produces M output clock
> +  cycles. D is the number of native clock cycles in which the GP_MN
> +  output is low, counted over 2^13 native clock cycles.
> +
> +  Hardware constraints:
> +
> +    M <= 511
> +    N <= 8191
> +    N > 2 * M
> +    M < D < (N - M)
> +    M and N must be coprime (no common divisor)
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - const: qcom,sc7280-gp-mnd
> +      - items:
> +          - enum:
> +              - qcom,sa8775p-gp-mnd
> +              - qcom,qcs8300-gp-mnd
> +              - qcom,qcs615-gp-mnd
> +          - const: qcom,sc7280-gp-mnd
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: PDM XO4 source clock
> +      - description: PDM AHB bus clock for register access
> +
> +  clock-names:
> +    items:
> +      - const: pdm_clk

pdm

> +      - const: ahb_clk

ahb

> +
> +  '#clock-cells':
> +    const: 0
> +
> +  assigned-clocks:
> +    maxItems: 1
> +    description: Parent clock phandle used to set the input frequency.
> +
> +  assigned-clock-rates:
> +    maxItems: 1
> +    description: |
> +      Rate for the parent clock in Hz.
> +      Supported rates: 19200000, 9600000, 6400000, 4800000.

Neither assigned-clocks nor assigned-clock-rates should be needed.
Parent clock is outside of scope of this binding.


> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - '#clock-cells'
> +  - assigned-clocks
> +  - assigned-clock-rates

And these two should not be required, either.

Best regards,
Krzysztof