[PATCH 6.1.y-cip 59/85] pinctrl: renesas: rzg2l: Add support for configuring schmitt-trigger

Tommaso Merciai
2025-03-13T01:33:15Z

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

commit 725933a54f718af5362ec39971b2933d8bdf6994 upstream.

Add support for configuring the multiplexed pins as schmitt-trigger
inputs.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Link: https://lore.kernel.org/20241004123658.764557-4-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 834fac5db21e..36f1a82352fb 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -139,6 +139,7 @@
#define PUPD(off) (0x1C00 + (off) * 8)
#define ISEL(off) (0x2C00 + (off) * 8)
#define NOD(off) (0x3000 + (off) * 8)
+#define SMT(off) (0x3400 + (off) * 8)
#define SD_CH(off, ch) ((off) + (ch) * 4)
#define ETH_POC(off, ch) ((off) + (ch) * 4)
#define QSPI (0x3008)
@@ -161,6 +162,7 @@
#define SR_MASK 0x01
#define PUPD_MASK 0x03
#define NOD_MASK 0x01
+#define SMT_MASK 0x01

#define PM_INPUT 0x1
#define PM_OUTPUT 0x2
@@ -1352,6 +1354,15 @@ static int rzg2l_pinctrl_pinconf_get(struct pinctrl_dev *pctldev,
return -EINVAL;
break;

+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ if (!(cfg & PIN_CFG_SMT))
+ return -EINVAL;
+
+ arg = rzg2l_read_pin_config(pctrl, SMT(off), bit, SMT_MASK);
+ if (!arg)
+ return -EINVAL;
+ break;
+
case RENESAS_RZV2H_PIN_CONFIG_OUTPUT_IMPEDANCE:
if (!(cfg & PIN_CFG_IOLH_RZV2H))
return -EINVAL;
@@ -1490,6 +1501,13 @@ static int rzg2l_pinctrl_pinconf_set(struct pinctrl_dev *pctldev,
param == PIN_CONFIG_DRIVE_OPEN_DRAIN ? 1 : 0);
break;

+ case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
+ if (!(cfg & PIN_CFG_SMT))
+ return -EINVAL;
+
+ rzg2l_rmw_pin_config(pctrl, SMT(off), bit, SMT_MASK, arg);
+ break;
+
case RENESAS_RZV2H_PIN_CONFIG_OUTPUT_IMPEDANCE:
if (!(cfg & PIN_CFG_IOLH_RZV2H))
return -EINVAL;
--
2.43.0