[PATCH 6.1.y-cip 36/85] pinctrl: renesas: rzg2l: Add support to configure slew-rate

Tommaso Merciai
2025-03-13T01:33:05Z

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

commit b588b53b2c474bdebbac0a663e0a6a0390db2fdf upstream.

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>
---
drivers/pinctrl/renesas/pinctrl-rzg2l.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index 430a7638a9d3..596e101f5b2d 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -126,6 +126,7 @@
#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)
@@ -144,6 +145,7 @@
#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]);

--
2.43.0