* [PATCH v7 1/2] dt-bindings: can: m_can: add ti,am62-mcan compatible
2026-09-24 21:54 [PATCH v7 0/2] can: m_can: introduce ti,am62-mcan compatible for out-of-band wakeup Kendall Willis
@ 2026-09-24 21:54 ` Kendall Willis
2026-09-24 21:54 ` [PATCH v7 2/2] can: m_can: add ti,am62-mcan compatible with out-of-band wakeup support Kendall Willis
1 sibling, 0 replies; 3+ messages in thread
From: Kendall Willis @ 2026-09-24 21:54 UTC (permalink / raw)
To: Markus Schneider-Pargmann, Marc Kleine-Budde, Vincent Mailhol,
Rob Herring, Krzysztof Kozlowski, Conor Dooley,
Chandrasekar Ramakrishnan
Cc: s-kochidanadu, a-kaur, s-tripathi1, vishalm, k-willis, linux-can,
devicetree, linux-kernel, Krzysztof Kozlowski
Add "ti,am62-mcan" device. Device is fully compatible with Bosch.
The device supports out-of-band wakeup capability.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Kendall Willis <k-willis@ti.com>
---
Documentation/devicetree/bindings/net/can/bosch,m_can.yaml | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
index 2c9d37975bedd652b3060ab11ba75c37565edaad..b1d77b57cb75d8c0b48491f2376d8e186a3ad27c 100644
--- a/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
+++ b/Documentation/devicetree/bindings/net/can/bosch,m_can.yaml
@@ -16,7 +16,11 @@ allOf:
properties:
compatible:
- const: bosch,m_can
+ oneOf:
+ - const: bosch,m_can
+ - items:
+ - const: ti,am62-mcan
+ - const: bosch,m_can
reg:
items:
--
2.34.1
^ permalink raw reply [flat|nested] 3+ messages in thread* [PATCH v7 2/2] can: m_can: add ti,am62-mcan compatible with out-of-band wakeup support
2026-09-24 21:54 [PATCH v7 0/2] can: m_can: introduce ti,am62-mcan compatible for out-of-band wakeup Kendall Willis
2026-09-24 21:54 ` [PATCH v7 1/2] dt-bindings: can: m_can: add ti,am62-mcan compatible Kendall Willis
@ 2026-09-24 21:54 ` Kendall Willis
1 sibling, 0 replies; 3+ messages in thread
From: Kendall Willis @ 2026-09-24 21:54 UTC (permalink / raw)
To: Markus Schneider-Pargmann, Marc Kleine-Budde, Vincent Mailhol,
Rob Herring, Krzysztof Kozlowski, Conor Dooley,
Chandrasekar Ramakrishnan
Cc: s-kochidanadu, a-kaur, s-tripathi1, vishalm, k-willis, linux-can,
devicetree, linux-kernel
In TI K3 AM62 SoCs, the M_CAN controllers are in power domains which are
OFF in the deepest low power states. However, the m_can pins are able to
wakeup the system from states where the power domain is OFF through its
out-of-band wakeup functionality.
Introduce the ti,am62-mcan compatible with match data to identify the
out-of-band wakeup capability for TI AM62 SoCs. During suspend, set the
out-of-band wakeup flag when the device is configured as a wakeup
source, the "wakeup" pinctrl state is present, and the match data
indicates out-of-band wakeup support.
Signed-off-by: Kendall Willis <k-willis@ti.com>
---
drivers/net/can/m_can/m_can.c | 10 ++++++++--
drivers/net/can/m_can/m_can.h | 6 ++++++
drivers/net/can/m_can/m_can_platform.c | 9 +++++++++
3 files changed, 23 insertions(+), 2 deletions(-)
diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
index 91a0c5eca260c19fa97c6f5724341cad0c1c95b8..815a11531ff47b8460aa3efa3075804b4f769848 100644
--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -2628,8 +2628,14 @@ int m_can_class_suspend(struct device *dev)
cdev->can.state = CAN_STATE_SLEEPING;
}
- if (!m_can_class_wakeup_pinctrl_enabled(cdev))
- pinctrl_pm_select_sleep_state(dev);
+ if (!ret) {
+ if (m_can_class_wakeup_pinctrl_enabled(cdev)) {
+ if (cdev->out_band_wakeup)
+ device_set_out_band_wakeup(dev);
+ } else {
+ pinctrl_pm_select_sleep_state(dev);
+ }
+ }
return 0;
diff --git a/drivers/net/can/m_can/m_can.h b/drivers/net/can/m_can/m_can.h
index 4743342b2fba3823819b9e2bc5b085cc0fe6d1e2..da64e6bbcef2a721a330e67fd852ca4a703c5794 100644
--- a/drivers/net/can/m_can/m_can.h
+++ b/drivers/net/can/m_can/m_can.h
@@ -132,6 +132,12 @@ struct m_can_classdev {
struct pinctrl *pinctrl;
struct pinctrl_state *pinctrl_state_wakeup;
+
+ bool out_band_wakeup;
+};
+
+struct m_can_of_data {
+ bool out_band_wakeup;
};
struct m_can_classdev *m_can_class_allocate_dev(struct device *dev, int sizeof_priv);
diff --git a/drivers/net/can/m_can/m_can_platform.c b/drivers/net/can/m_can/m_can_platform.c
index 51dd41dbf2c9a971295994946e190ec0187addd5..dbd59730c0bc16f519cb2c40bcd8093ca1bcb369 100644
--- a/drivers/net/can/m_can/m_can_platform.c
+++ b/drivers/net/can/m_can/m_can_platform.c
@@ -83,6 +83,7 @@ static int m_can_plat_probe(struct platform_device *pdev)
void __iomem *addr;
void __iomem *mram_addr;
struct phy *transceiver;
+ const struct m_can_of_data *of_data;
int irq = 0, ret = 0;
mcan_class = m_can_class_allocate_dev(&pdev->dev,
@@ -148,6 +149,9 @@ static int m_can_plat_probe(struct platform_device *pdev)
mcan_class->is_peripheral = false;
+ of_data = of_device_get_match_data(&pdev->dev);
+ mcan_class->out_band_wakeup = of_data && of_data->out_band_wakeup;
+
platform_set_drvdata(pdev, mcan_class);
pm_runtime_enable(mcan_class->dev);
@@ -218,8 +222,13 @@ static const struct dev_pm_ops m_can_pmops = {
SET_SYSTEM_SLEEP_PM_OPS(m_can_suspend, m_can_resume)
};
+static const struct m_can_of_data m_can_plat_am62 = {
+ .out_band_wakeup = true,
+};
+
static const struct of_device_id m_can_of_table[] = {
{ .compatible = "bosch,m_can", .data = NULL },
+ { .compatible = "ti,am62-mcan", .data = &m_can_plat_am62 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, m_can_of_table);
--
2.34.1
^ permalink raw reply [flat|nested] 3+ messages in thread