scmi: pinctrl: add pinctrl driver for SCMI

This driver adds the base support of pinctrl over SCMI.  The driver
does two main things.  First, it allows you to configure the initial
pin states.  Secondly, it's used a base to build a GPIO driver on
top of it.

To configure the states then add a pinmux config to the scmi_pinctrl
section:

        scmi_pinctrl: protocol@19 {
                reg = <0x19>;
                pinmux1: pinmux_test {
                        pinmux = <0 1 0xFFFFFFFF 18 1
                                  0 2 0xFFFFFFFF 18 1
                                  0 3 0xFFFFFFFF 18 1>;
                        function = "f_gpio1";
                        groups = "grp_1", "grp_3";
                };
        };

Under linux the pinctrl subsystem will parse the function and group
properties and use that to handle muxing.  However, under u-boot the
pin muxing is done using the "pinmux" property, which feeds raw SCMI
pinctrl PINCTRL_SETTINGS_CONFIGURE commands to the server.  The
numbers are: selector, identifier, function_id, config_type, and
config_value.  In the example above, it sets pins 1, 2, and 3 to 1.
The linux-kernel ignores this pinmux property.

Signed-off-by: Dan Carpenter <[email protected]>
Reviewed-by: Peng Fan <[email protected]>
Signed-off-by: Peng Fan <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/scmi_agent-uclass.h b/include/scmi_agent-uclass.h
index 9b36d3ae67b..c40b448bcba 100644
--- a/include/scmi_agent-uclass.h
+++ b/include/scmi_agent-uclass.h
@@ -52,7 +52,7 @@ struct scmi_agent_priv {
 #if IS_ENABLED(CONFIG_DM_REGULATOR_SCMI)
 	struct udevice *voltagedom_dev;
 #endif
-#if IS_ENABLED(CONFIG_PINCTRL_IMX_SCMI)
+#if IS_ENABLED(CONFIG_PINCTRL_SCMI) || IS_ENABLED(CONFIG_PINCTRL_IMX_SCMI)
 	struct udevice *pinctrl_dev;
 #endif
 #if IS_ENABLED(CONFIG_SCMI_ID_VENDOR_80)