pinctrl: pinctrl-zynqmp: Add support for output-enable and bias-high impedance

Add support to handle 'output-enable' and 'bias-high-impedance'
configurations.

Using these pinctrl properties observed hang issues with older PMUFW(Xilinx
ZynqMP Platform Management Firmware), hence reverted the patch.
Commit 9989bc33c4894e075167 ("Revert "pinctrl: pinctrl-zynqmp: Add support
for output-enable and bias-high-impedance"").

Support for configuring these properties added in PMUFW Configuration Set
version 2.0. When there is a request for these configurations from pinctrl
driver for ZynqMP platform, xilinx firmware driver checks for this version
before configuring these properties to avoid the hang issue and proceeds
further only when firmware version is >=2 otherwise it returns error.

Signed-off-by: Sai Krishna Potthuri <sai.krishna.potthuri@amd.com>
Reviewed-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/20230731095026.3766675-5-sai.krishna.potthuri@amd.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/pinctrl/pinctrl-zynqmp.c b/drivers/pinctrl/pinctrl-zynqmp.c
index 8d2cb0999f2ffd9ae7c2b8aee6fd7fce92406ce7..f2be341f73e13ebe1e49d7599272d6e285c3fdb3 100644 (file)
--- a/drivers/pinctrl/pinctrl-zynqmp.c
+++ b/drivers/pinctrl/pinctrl-zynqmp.c
@@ -415,6 +415,10 @@ 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
@@ -423,6 +427,11 @@ 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",