pinctrl: zynqmp: Add version check for TRISTATE configuration

Support for configuring TRISTATE parameter is added in ZYNQMP PMUFW(Xilinx
ZynqMP Platform Management Firmware) Configuration Param Set version 2.0.
If the requested configuration is TRISTATE then check the version before
requesting Xilinx firmware to set the configuration.

Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma@amd.com>
Link: https://lore.kernel.org/r/20230811054829.13162-3-ashok.reddy.soma@amd.com
Signed-off-by: Michal Simek <michal.simek@amd.com>

diff --git a/drivers/pinctrl/pinctrl-zynqmp.c b/drivers/pinctrl/pinctrl-zynqmp.c
index 02626a7..e9857f5 100644 (file)
--- a/drivers/pinctrl/pinctrl-zynqmp.c
+++ b/drivers/pinctrl/pinctrl-zynqmp.c
@@ -158,6 +158,12 @@ static int zynqmp_pm_pinctrl_set_config(const u32 pin, const u32 param, u32 valu
 {
        int ret;
 
+       if (param == PM_PINCTRL_CONFIG_TRI_STATE) {
+               ret = zynqmp_pm_feature(PM_PINCTRL_CONFIG_PARAM_SET);
+               if (ret < PM_PINCTRL_PARAM_SET_VERSION)
+                       return -EOPNOTSUPP;
+       }
+
        /* Request the pin first */
        ret = xilinx_pm_request(PM_PINCTRL_REQUEST, pin, 0, 0, 0, NULL);
        if (ret) {