linux-kernel - [PATCH v2 3/5] pinctrl: renesas: pinctrl-rzg2l: Add support to get/set pin config for GPIO port pins

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Date:   Fri, 29 Oct 2021 13:44:35 +0100
From:   Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
To:     Geert Uytterhoeven <geert+renesas@...der.be>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh+dt@...nel.org>, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>,
        Biju Das <biju.das.jz@...renesas.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH v2 3/5] pinctrl: renesas: pinctrl-rzg2l: Add support to get/set pin config for GPIO port pins

Add support to get/set pin config for GPIO port pins.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Reviewed-by: Biju Das <biju.das.jz@...renesas.com>
---
 drivers/pinctrl/renesas/pinctrl-rzg2l.c | 33 +++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index f294ae7b8b5a..bc34c63bbb36 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -426,6 +426,23 @@ static int rzg2l_dt_node_to_map(struct pinctrl_dev *pctldev,
 	return ret;
 }
 
+static int rzg2l_validate_gpio_pin(struct rzg2l_pinctrl *pctrl,
+				   u32 cfg, u32 port, u8 bit)
+{
+	u8 pincount = RZG2L_GPIO_PORT_GET_PINCNT(cfg);
+	u32 port_index = RZG2L_GPIO_PORT_GET_INDEX(cfg);
+	u32 data;
+
+	if (bit >= pincount || port >= pctrl->data->n_port_pins)
+		return -EINVAL;
+
+	data = pctrl->data->port_pin_configs[port];
+	if (port_index != RZG2L_GPIO_PORT_GET_INDEX(data))
+		return -EINVAL;
+
+	return 0;
+}
+
 static u32 rzg2l_read_pin_config(struct rzg2l_pinctrl *pctrl, bool port_pin,
 				 u32 offset, u8 bit, u32 mask)
 {
@@ -495,6 +512,14 @@ static int rzg2l_pinctrl_pinconf_get(struct pinctrl_dev *pctldev,
 		port = RZG2L_SINGLE_PIN_GET_PORT(*pin_data);
 		cfg = RZG2L_SINGLE_PIN_GET_CFGS(*pin_data);
 		bit = RZG2L_SINGLE_PIN_GET_BIT(*pin_data);
+	} else {
+		cfg = RZG2L_GPIO_PORT_GET_CFGS(*pin_data);
+		port = RZG2L_PIN_ID_TO_PORT(_pin);
+		bit = RZG2L_PIN_ID_TO_PIN(_pin);
+		port_pin = true;
+
+		if (rzg2l_validate_gpio_pin(pctrl, *pin_data, port, bit))
+			return -EINVAL;
 	}
 
 	switch (param) {
@@ -557,6 +582,14 @@ static int rzg2l_pinctrl_pinconf_set(struct pinctrl_dev *pctldev,
 		port = RZG2L_SINGLE_PIN_GET_PORT(*pin_data);
 		cfg = RZG2L_SINGLE_PIN_GET_CFGS(*pin_data);
 		bit = RZG2L_SINGLE_PIN_GET_BIT(*pin_data);
+	} else {
+		cfg = RZG2L_GPIO_PORT_GET_CFGS(*pin_data);
+		port = RZG2L_PIN_ID_TO_PORT(_pin);
+		bit = RZG2L_PIN_ID_TO_PIN(_pin);
+		port_pin = true;
+
+		if (rzg2l_validate_gpio_pin(pctrl, *pin_data, port, bit))
+			return -EINVAL;
 	}
 
 	for (i = 0; i < num_configs; i++) {
-- 
2.17.1