linux-kernel - [PATCH v2 06/10] pinctrl: axp209: add support for AXP813 GPIOs

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Date:   Tue, 26 Sep 2017 14:17:16 +0200
From:   Quentin Schulz <quentin.schulz@...e-electrons.com>
To:     linus.walleij@...aro.org, robh+dt@...nel.org, mark.rutland@....com,
        wens@...e.org, linux@...linux.org.uk,
        maxime.ripard@...e-electrons.com, lee.jones@...aro.org
Cc:     linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-sunxi@...glegroups.com, thomas.petazzoni@...e-electrons.com,
        Quentin Schulz <quentin.schulz@...e-electrons.com>
Subject: [PATCH v2 06/10] pinctrl: axp209: add support for AXP813 GPIOs

The AXP813 has only two GPIOs. GPIO0 can either be used as a GPIO, an
LDO regulator or an ADC. GPIO1 can be used either as a GPIO or an LDO
regulator.

Moreover, the status bit of the GPIOs when in input mode is not offset
by 4 unlike the AXP209.

Signed-off-by: Quentin Schulz <quentin.schulz@...e-electrons.com>
---
 Documentation/devicetree/bindings/pinctrl/pinctrl-axp209.txt | 13 ++-
 drivers/pinctrl/pinctrl-axp209.c                             | 30 ++++++-
 2 files changed, 39 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/pinctrl/pinctrl-axp209.txt b/Documentation/devicetree/bindings/pinctrl/pinctrl-axp209.txt
index a5bfe87..a1d5dec 100644
--- a/Documentation/devicetree/bindings/pinctrl/pinctrl-axp209.txt
+++ b/Documentation/devicetree/bindings/pinctrl/pinctrl-axp209.txt
@@ -4,7 +4,9 @@ This driver follows the usual GPIO bindings found in
 Documentation/devicetree/bindings/gpio/gpio.txt
 
 Required properties:
-- compatible: Should be "x-powers,axp209-gpio"
+- compatible: Should be one of:
+	- "x-powers,axp209-gpio"
+	- "x-powers,axp813-pctl"
 - #gpio-cells: Should be two. The first cell is the pin number and the
   second is the GPIO flags.
 - gpio-controller: Marks the device node as a GPIO controller.
@@ -49,8 +51,17 @@ Example:
 GPIOs and their functions
 -------------------------
 
+axp209
+------
 GPIO	|	Functions
 ------------------------
 GPIO0	|	gpio_in, gpio_out, ldo, adc
 GPIO1	|	gpio_in, gpio_out, ldo, adc
 GPIO2	|	gpio_in, gpio_out
+
+axp813
+------
+GPIO	|	Functions
+------------------------
+GPIO0	|	gpio_in, gpio_out, ldo, adc
+GPIO1	|	gpio_in, gpio_out, ldo
diff --git a/drivers/pinctrl/pinctrl-axp209.c b/drivers/pinctrl/pinctrl-axp209.c
index 11f871e..500862b 100644
--- a/drivers/pinctrl/pinctrl-axp209.c
+++ b/drivers/pinctrl/pinctrl-axp209.c
@@ -108,11 +108,28 @@ static const struct axp20x_desc_pin axp209_pins[] = {
 		   AXP20X_FUNCTION(0x2, "gpio_in")),
 };
 
+static const struct axp20x_desc_pin axp813_pins[] = {
+	AXP20X_PIN(AXP20X_PINCTRL_PIN(0, "GPIO0", (void *)AXP20X_GPIO0_CTRL),
+		   AXP20X_FUNCTION(0x0, "gpio_out"),
+		   AXP20X_FUNCTION(0x2, "gpio_in"),
+		   AXP20X_FUNCTION(0x3, "ldo"),
+		   AXP20X_FUNCTION(0x4, "adc")),
+	AXP20X_PIN(AXP20X_PINCTRL_PIN(1, "GPIO1", (void *)AXP20X_GPIO1_CTRL),
+		   AXP20X_FUNCTION(0x0, "gpio_out"),
+		   AXP20X_FUNCTION(0x2, "gpio_in"),
+		   AXP20X_FUNCTION(0x3, "ldo")),
+};
+
 static const struct axp20x_pinctrl_desc axp20x_pinctrl_data = {
 	.pins	= axp209_pins,
 	.npins	= ARRAY_SIZE(axp209_pins),
 };
 
+static const struct axp20x_pinctrl_desc axp813_pinctrl_data = {
+	.pins	= axp813_pins,
+	.npins	= ARRAY_SIZE(axp813_pins),
+};
+
 static int axp20x_gpio_input(struct gpio_chip *chip, unsigned offset)
 {
 	return pinctrl_gpio_direction_input(chip->base + offset);
@@ -479,6 +496,7 @@ static int axp20x_pctl_probe(struct platform_device *pdev)
 	struct axp20x_pctl *pctl;
 	struct pinctrl_desc *pctrl_desc;
 	struct pinctrl_pin_desc *pins;
+	struct device_node *np = pdev->dev.of_node;
 	int ret, i;
 
 	if (!of_device_is_available(pdev->dev.of_node))
@@ -505,13 +523,18 @@ static int axp20x_pctl_probe(struct platform_device *pdev)
 	pctl->chip.set			= axp20x_gpio_set;
 	pctl->chip.direction_input	= axp20x_gpio_input;
 	pctl->chip.direction_output	= axp20x_gpio_output;
-	pctl->chip.ngpio		= 3;
 
 	pctl->regmap = axp20x->regmap;
 
-	pctl->desc = &axp20x_pinctrl_data;
-	pctl->gpio_status_offset = 4;
+	if (of_device_is_compatible(np, "x-powers,axp209-gpio")) {
+		pctl->desc = &axp20x_pinctrl_data;
+		pctl->gpio_status_offset = 4;
+	} else {
+		pctl->desc = &axp813_pinctrl_data;
+		pctl->gpio_status_offset = 0;
+	}
 	pctl->dev = &pdev->dev;
+	pctl->chip.ngpio = pctl->desc->npins;
 
 	platform_set_drvdata(pdev, pctl);
 
@@ -566,6 +589,7 @@ static int axp20x_pctl_probe(struct platform_device *pdev)
 
 static const struct of_device_id axp20x_pctl_match[] = {
 	{ .compatible = "x-powers,axp209-gpio" },
+	{ .compatible = "x-powers,axp813-pctl" },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, axp20x_pctl_match);
-- 
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