linux-kernel - [PATCH 3/3] pinctrl: renesas: rzg2l: Add support for configuring schmitt-trigger

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Message-Id: <20240918120909.284930-4-prabhakar.mahadev-lad.rj@bp.renesas.com>
Date: Wed, 18 Sep 2024 13:09:09 +0100
From: Prabhakar <prabhakar.csengg@...il.com>
To: Geert Uytterhoeven <geert+renesas@...der.be>,
	Linus Walleij <linus.walleij@...aro.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Magnus Damm <magnus.damm@...il.com>
Cc: linux-renesas-soc@...r.kernel.org,
	linux-gpio@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Prabhakar <prabhakar.csengg@...il.com>,
	Biju Das <biju.das.jz@...renesas.com>,
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH 3/3] pinctrl: renesas: rzg2l: Add support for configuring schmitt-trigger

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

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

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
 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 42181cc877fe..60ef20ca3ccf 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -140,6 +140,7 @@
 #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)
@@ -162,6 +163,7 @@
 #define SR_MASK			0x01
 #define PUPD_MASK		0x03
 #define NOD_MASK		0x01
+#define SMT_MASK		0x01
 
 #define PM_INPUT		0x1
 #define PM_OUTPUT		0x2
@@ -1348,6 +1350,15 @@ 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;
@@ -1484,6 +1495,13 @@ static int rzg2l_pinctrl_pinconf_set(struct pinctrl_dev *pctldev,
 			rzg2l_rmw_pin_config(pctrl, NOD(off), bit, NOD_MASK, 1);
 			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;
-- 
2.34.1