[PATCH 0/2] pinctrl: pinctrl-zynqmp: Revert output-enable and bias-high-impedance support

[PATCH 0/2] pinctrl: pinctrl-zynqmp: Revert output-enable and bias-high-impedance support

[Sai Krishna Potthuri]

Having support for output-enable and bias-high-impedance properties
causing system hang with older Xilinx ZynqMP Platform Management Firmware
because there is missing autodetection feature.
When this feature is implemented, support for these two properties should
bring back.

Sai Krishna Potthuri (2):
  Revert "pinctrl: pinctrl-zynqmp: Add support for output-enable and
    bias-high-impedance"
  Revert "dt-bindings: pinctrl-zynqmp: Add output-enable configuration"

 .../devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml | 4 ----
 drivers/pinctrl/pinctrl-zynqmp.c                         | 9 ---------
 2 files changed, 13 deletions(-)

-- 
2.17.1

[PATCH 1/2] Revert "pinctrl: pinctrl-zynqmp: Add support for output-enable and bias-high-impedance"

[Sai Krishna Potthuri]

This reverts commit ad2bea79ef0144043721d4893eef719c907e2e63.

On systems with older PMUFW (Xilinx ZynqMP Platform Management Firmware)
using these pinctrl properties can cause system hang because there is
missing feature autodetection.
When this feature is implemented in the PMUFW, support for these two
properties should bring back.

Signed-off-by: Sai Krishna Potthuri <sai.krishna.potthuri@amd.com>
---
 drivers/pinctrl/pinctrl-zynqmp.c | 9 ---------
 1 file changed, 9 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-zynqmp.c b/drivers/pinctrl/pinctrl-zynqmp.c
index 7d2fbf8a02cd..c98f35ad8921 100644
--- a/drivers/pinctrl/pinctrl-zynqmp.c
+++ b/drivers/pinctrl/pinctrl-zynqmp.c
@@ -412,10 +412,6 @@ static int zynqmp_pinconf_cfg_set(struct pinctrl_dev *pctldev,
 
 			break;
 		case PIN_CONFIG_BIAS_HIGH_IMPEDANCE:
-			param = PM_PINCTRL_CONFIG_TRI_STATE;
-			arg = PM_PINCTRL_TRI_STATE_ENABLE;
-			ret = zynqmp_pm_pinctrl_set_config(pin, param, arg);
-			break;
 		case PIN_CONFIG_MODE_LOW_POWER:
 			/*
 			 * These cases are mentioned in dts but configurable
@@ -424,11 +420,6 @@ static int zynqmp_pinconf_cfg_set(struct pinctrl_dev *pctldev,
 			 */
 			ret = 0;
 			break;
-		case PIN_CONFIG_OUTPUT_ENABLE:
-			param = PM_PINCTRL_CONFIG_TRI_STATE;
-			arg = PM_PINCTRL_TRI_STATE_DISABLE;
-			ret = zynqmp_pm_pinctrl_set_config(pin, param, arg);
-			break;
 		default:
 			dev_warn(pctldev->dev,
 				 "unsupported configuration parameter '%u'\n",
-- 
2.17.1

[PATCH 2/2] Revert "dt-bindings: pinctrl-zynqmp: Add output-enable configuration"

[Sai Krishna Potthuri]

This reverts commit 133ad0d9af99bdca90705dadd8d31c20bfc9919f.

On systems with older PMUFW (Xilinx ZynqMP Platform Management Firmware)
using these pinctrl properties can cause system hang because there is
missing feature autodetection.
When this feature is implemented, support for these two properties should
bring back.

Signed-off-by: Sai Krishna Potthuri <sai.krishna.potthuri@amd.com>
---
 .../devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml      | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
index 1e2b9b627b12..2722dc7bb03d 100644
--- a/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
+++ b/Documentation/devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml
@@ -274,10 +274,6 @@ patternProperties:
           slew-rate:
             enum: [0, 1]
 
-          output-enable:
-            description:
-              This will internally disable the tri-state for MIO pins.
-
           drive-strength:
             description:
               Selects the drive strength for MIO pins, in mA.
-- 
2.17.1

Re: [PATCH 0/2] pinctrl: pinctrl-zynqmp: Revert output-enable and bias-high-impedance support

[Michal Simek]

On 10/17/22 14:00, Sai Krishna Potthuri wrote:
> Having support for output-enable and bias-high-impedance properties
> causing system hang with older Xilinx ZynqMP Platform Management Firmware
> because there is missing autodetection feature.
> When this feature is implemented, support for these two properties should
> bring back.
> 
> Sai Krishna Potthuri (2):
>    Revert "pinctrl: pinctrl-zynqmp: Add support for output-enable and
>      bias-high-impedance"
>    Revert "dt-bindings: pinctrl-zynqmp: Add output-enable configuration"
> 
>   .../devicetree/bindings/pinctrl/xlnx,zynqmp-pinctrl.yaml | 4 ----
>   drivers/pinctrl/pinctrl-zynqmp.c                         | 9 ---------
>   2 files changed, 13 deletions(-)
> 

You should CC stable to get it to stable kernels too.

Thanks,
Michal