[PATCH v2 2/3] pinctrl: renesas: rzg2l: Add support for enabling/disabling open-drain outputs

From: Prabhakar
Date: Fri Oct 04 2024 - 08:38:03 EST


From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>

Add support for enabling and disabling open-drain outputs.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
---
v1->v2
- Implemented PIN_CONFIG_DRIVE_OPEN_DRAIN to disable open drain
---
drivers/pinctrl/renesas/pinctrl-rzg2l.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)

diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index b2d309f742af..8d576cc74003 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -139,6 +139,7 @@
#define IEN(off) (0x1800 + (off) * 8)
#define PUPD(off) (0x1C00 + (off) * 8)
#define ISEL(off) (0x2C00 + (off) * 8)
+#define NOD(off) (0x3000 + (off) * 8)
#define SD_CH(off, ch) ((off) + (ch) * 4)
#define ETH_POC(off, ch) ((off) + (ch) * 4)
#define QSPI (0x3008)
@@ -160,6 +161,7 @@
#define IOLH_MASK 0x03
#define SR_MASK 0x01
#define PUPD_MASK 0x03
+#define NOD_MASK 0x01

#define PM_INPUT 0x1
#define PM_OUTPUT 0x2
@@ -1337,6 +1339,18 @@ static int rzg2l_pinctrl_pinconf_get(struct pinctrl_dev *pctldev,
break;
}

+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ if (!(cfg & PIN_CFG_NOD))
+ return -EINVAL;
+
+ arg = rzg2l_read_pin_config(pctrl, NOD(off), bit, NOD_MASK);
+ if (!arg && param != PIN_CONFIG_DRIVE_PUSH_PULL)
+ return -EINVAL;
+ if (arg && param != PIN_CONFIG_DRIVE_OPEN_DRAIN)
+ return -EINVAL;
+ break;
+
case RENESAS_RZV2H_PIN_CONFIG_OUTPUT_IMPEDANCE:
if (!(cfg & PIN_CFG_IOLH_RZV2H))
return -EINVAL;
@@ -1466,6 +1480,15 @@ static int rzg2l_pinctrl_pinconf_set(struct pinctrl_dev *pctldev,
rzg2l_rmw_pin_config(pctrl, IOLH(off), bit, IOLH_MASK, index);
break;

+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ if (!(cfg & PIN_CFG_NOD))
+ return -EINVAL;
+
+ rzg2l_rmw_pin_config(pctrl, NOD(off), bit, NOD_MASK,
+ param == PIN_CONFIG_DRIVE_OPEN_DRAIN ? 1 : 0);
+ break;
+
case RENESAS_RZV2H_PIN_CONFIG_OUTPUT_IMPEDANCE:
if (!(cfg & PIN_CFG_IOLH_RZV2H))
return -EINVAL;
--
2.43.0