summaryrefslogtreecommitdiffstats
path: root/arch/mips/ath79/gpio.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/ath79/gpio.c')
-rw-r--r--arch/mips/ath79/gpio.c79
1 files changed, 57 insertions, 22 deletions
diff --git a/arch/mips/ath79/gpio.c b/arch/mips/ath79/gpio.c
index 8d025b028bb1..f59ccb26520a 100644
--- a/arch/mips/ath79/gpio.c
+++ b/arch/mips/ath79/gpio.c
@@ -20,13 +20,15 @@
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/gpio.h>
+#include <linux/platform_data/gpio-ath79.h>
+#include <linux/of_device.h>
#include <asm/mach-ath79/ar71xx_regs.h>
#include <asm/mach-ath79/ath79.h>
#include "common.h"
static void __iomem *ath79_gpio_base;
-static unsigned long ath79_gpio_count;
+static u32 ath79_gpio_count;
static DEFINE_SPINLOCK(ath79_gpio_lock);
static void __ath79_gpio_set_value(unsigned gpio, int value)
@@ -178,39 +180,72 @@ void ath79_gpio_function_disable(u32 mask)
ath79_gpio_function_setup(0, mask);
}
-void __init ath79_gpio_init(void)
+static const struct of_device_id ath79_gpio_of_match[] = {
+ { .compatible = "qca,ar7100-gpio" },
+ { .compatible = "qca,ar9340-gpio" },
+ {},
+};
+
+static int ath79_gpio_probe(struct platform_device *pdev)
{
+ struct ath79_gpio_platform_data *pdata = pdev->dev.platform_data;
+ struct device_node *np = pdev->dev.of_node;
+ struct resource *res;
+ bool oe_inverted;
int err;
- if (soc_is_ar71xx())
- ath79_gpio_count = AR71XX_GPIO_COUNT;
- else if (soc_is_ar7240())
- ath79_gpio_count = AR7240_GPIO_COUNT;
- else if (soc_is_ar7241() || soc_is_ar7242())
- ath79_gpio_count = AR7241_GPIO_COUNT;
- else if (soc_is_ar913x())
- ath79_gpio_count = AR913X_GPIO_COUNT;
- else if (soc_is_ar933x())
- ath79_gpio_count = AR933X_GPIO_COUNT;
- else if (soc_is_ar934x())
- ath79_gpio_count = AR934X_GPIO_COUNT;
- else if (soc_is_qca955x())
- ath79_gpio_count = QCA955X_GPIO_COUNT;
- else
- BUG();
+ if (np) {
+ err = of_property_read_u32(np, "ngpios", &ath79_gpio_count);
+ if (err) {
+ dev_err(&pdev->dev, "ngpios property is not valid\n");
+ return err;
+ }
+ if (ath79_gpio_count >= 32) {
+ dev_err(&pdev->dev, "ngpios must be less than 32\n");
+ return -EINVAL;
+ }
+ oe_inverted = of_device_is_compatible(np, "qca,ar9340-gpio");
+ } else if (pdata) {
+ ath79_gpio_count = pdata->ngpios;
+ oe_inverted = pdata->oe_inverted;
+ } else {
+ dev_err(&pdev->dev, "No DT node or platform data found\n");
+ return -EINVAL;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ ath79_gpio_base = devm_ioremap_nocache(
+ &pdev->dev, res->start, resource_size(res));
+ if (!ath79_gpio_base)
+ return -ENOMEM;
- ath79_gpio_base = ioremap_nocache(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE);
+ ath79_gpio_chip.dev = &pdev->dev;
ath79_gpio_chip.ngpio = ath79_gpio_count;
- if (soc_is_ar934x() || soc_is_qca955x()) {
+ if (oe_inverted) {
ath79_gpio_chip.direction_input = ar934x_gpio_direction_input;
ath79_gpio_chip.direction_output = ar934x_gpio_direction_output;
}
err = gpiochip_add(&ath79_gpio_chip);
- if (err)
- panic("cannot add AR71xx GPIO chip, error=%d", err);
+ if (err) {
+ dev_err(&pdev->dev,
+ "cannot add AR71xx GPIO chip, error=%d", err);
+ return err;
+ }
+
+ return 0;
}
+static struct platform_driver ath79_gpio_driver = {
+ .driver = {
+ .name = "ath79-gpio",
+ .of_match_table = ath79_gpio_of_match,
+ },
+ .probe = ath79_gpio_probe,
+};
+
+module_platform_driver(ath79_gpio_driver);
+
int gpio_get_value(unsigned gpio)
{
if (gpio < ath79_gpio_count)
OpenPOWER on IntegriCloud