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authorLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>2013-11-29 14:48:00 +0100
committerLinus Walleij <linus.walleij@linaro.org>2013-12-03 11:26:07 +0100
commit850dfe17e3c467f50a0b9a527a65831873740c23 (patch)
treef897f083a75fbce72fc2cc0fe041be27f17a11a9 /drivers/gpio/gpio-rcar.c
parentd463c6ff88108d187c73396280f5dae8b4a78e65 (diff)
downloadop-kernel-dev-850dfe17e3c467f50a0b9a527a65831873740c23.zip
op-kernel-dev-850dfe17e3c467f50a0b9a527a65831873740c23.tar.gz
gpio: rcar: Support both edge trigger with DT
Some versions of the R-Car GPIO controller support triggering on both edges of the input signal. Whether this capability is supported is currently specified in platform data. R-Car GPIO devices instantiated from the device tree have the capability turned off even when the hardware supports it. To fix this, add DT match data support to the driver, initialize both edge trigger support from match data and enable both edge trigger in r8a7790 and r8a7791 match data. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Acked-by: Magnus Damm <damm@opensource.se> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-rcar.c')
-rw-r--r--drivers/gpio/gpio-rcar.c56
1 files changed, 43 insertions, 13 deletions
diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
index d2c34da..28fa94a 100644
--- a/drivers/gpio/gpio-rcar.c
+++ b/drivers/gpio/gpio-rcar.c
@@ -284,7 +284,34 @@ static struct irq_domain_ops gpio_rcar_irq_domain_ops = {
.map = gpio_rcar_irq_domain_map,
};
-static void gpio_rcar_parse_pdata(struct gpio_rcar_priv *p)
+struct gpio_rcar_info {
+ bool has_both_edge_trigger;
+};
+
+static const struct of_device_id gpio_rcar_of_table[] = {
+ {
+ .compatible = "renesas,gpio-r8a7790",
+ .data = (void *)&(const struct gpio_rcar_info) {
+ .has_both_edge_trigger = true,
+ },
+ }, {
+ .compatible = "renesas,gpio-r8a7791",
+ .data = (void *)&(const struct gpio_rcar_info) {
+ .has_both_edge_trigger = true,
+ },
+ }, {
+ .compatible = "renesas,gpio-rcar",
+ .data = (void *)&(const struct gpio_rcar_info) {
+ .has_both_edge_trigger = false,
+ },
+ }, {
+ /* Terminator */
+ },
+};
+
+MODULE_DEVICE_TABLE(of, gpio_rcar_of_table);
+
+static int gpio_rcar_parse_pdata(struct gpio_rcar_priv *p)
{
struct gpio_rcar_config *pdata = dev_get_platdata(&p->pdev->dev);
struct device_node *np = p->pdev->dev.of_node;
@@ -294,11 +321,21 @@ static void gpio_rcar_parse_pdata(struct gpio_rcar_priv *p)
if (pdata) {
p->config = *pdata;
} else if (IS_ENABLED(CONFIG_OF) && np) {
+ const struct of_device_id *match;
+ const struct gpio_rcar_info *info;
+
+ match = of_match_node(gpio_rcar_of_table, np);
+ if (!match)
+ return -EINVAL;
+
+ info = match->data;
+
ret = of_parse_phandle_with_fixed_args(np, "gpio-ranges", 3, 0,
&args);
p->config.number_of_pins = ret == 0 ? args.args[2]
: RCAR_MAX_GPIO_PER_BANK;
p->config.gpio_base = -1;
+ p->config.has_both_edge_trigger = info->has_both_edge_trigger;
}
if (p->config.number_of_pins == 0 ||
@@ -308,6 +345,8 @@ static void gpio_rcar_parse_pdata(struct gpio_rcar_priv *p)
p->config.number_of_pins, RCAR_MAX_GPIO_PER_BANK);
p->config.number_of_pins = RCAR_MAX_GPIO_PER_BANK;
}
+
+ return 0;
}
static int gpio_rcar_probe(struct platform_device *pdev)
@@ -330,7 +369,9 @@ static int gpio_rcar_probe(struct platform_device *pdev)
spin_lock_init(&p->lock);
/* Get device configuration from DT node or platform data. */
- gpio_rcar_parse_pdata(p);
+ ret = gpio_rcar_parse_pdata(p);
+ if (ret < 0)
+ return ret;
platform_set_drvdata(pdev, p);
@@ -434,17 +475,6 @@ static int gpio_rcar_remove(struct platform_device *pdev)
return 0;
}
-#ifdef CONFIG_OF
-static const struct of_device_id gpio_rcar_of_table[] = {
- {
- .compatible = "renesas,gpio-rcar",
- },
- { },
-};
-
-MODULE_DEVICE_TABLE(of, gpio_rcar_of_table);
-#endif
-
static struct platform_driver gpio_rcar_device_driver = {
.probe = gpio_rcar_probe,
.remove = gpio_rcar_remove,
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