pinctrl: renesas: rzg2l: Add support to configure slew-rate

Add support to configure slew-rate property of the pin.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20240530173857.164073-11-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index 1daed684930c7aa5eff18705681f77c1b86bfd29..0cebcb5fc7bedfb2f76101f47c4fae0f0bd0829a 100644 (file)
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -127,6 +127,7 @@
 #define PFC(off)               (0x0400 + (off) * 4)
 #define PIN(off)               (0x0800 + (off))
 #define IOLH(off)              (0x1000 + (off) * 8)
+#define SR(off)                        (0x1400 + (off) * 8)
 #define IEN(off)               (0x1800 + (off) * 8)
 #define ISEL(off)              (0x2C00 + (off) * 8)
 #define SD_CH(off, ch)         ((off) + (ch) * 4)
@@ -145,6 +146,7 @@
 #define PFC_MASK               0x07
 #define IEN_MASK               0x01
 #define IOLH_MASK              0x03
+#define SR_MASK                        0x01
 
 #define PM_INPUT               0x1
 #define PM_OUTPUT              0x2
@@ -1049,6 +1051,13 @@ static int rzg2l_pinctrl_pinconf_get(struct pinctrl_dev *pctldev,
                arg = ret;
                break;
 
+       case PIN_CONFIG_SLEW_RATE:
+               if (!(cfg & PIN_CFG_SR))
+                       return -EINVAL;
+
+               arg = rzg2l_read_pin_config(pctrl, SR(off), bit, SR_MASK);
+               break;
+
        case PIN_CONFIG_DRIVE_STRENGTH: {
                unsigned int index;
 
@@ -1155,6 +1164,15 @@ static int rzg2l_pinctrl_pinconf_set(struct pinctrl_dev *pctldev,
                        settings.power_source = pinconf_to_config_argument(_configs[i]);
                        break;
 
+               case PIN_CONFIG_SLEW_RATE:
+                       arg = pinconf_to_config_argument(_configs[i]);
+
+                       if (!(cfg & PIN_CFG_SR) || arg > 1)
+                               return -EINVAL;
+
+                       rzg2l_rmw_pin_config(pctrl, SR(off), bit, SR_MASK, arg);
+                       break;
+
                case PIN_CONFIG_DRIVE_STRENGTH:
                        arg = pinconf_to_config_argument(_configs[i]);