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Subject[PATCH 11/14] MIPS: ath79: Add OF support to the GPIO driver
Date
Replace the simple GPIO chip registration by a platform driver
and make ath79_gpio_init() just register the device.

Signed-off-by: Alban Bedel <albeu@free.fr>
---
arch/mips/ath79/dev-common.c | 13 ++++++++
arch/mips/ath79/gpio.c | 73 +++++++++++++++++++++++++++++++++++++++++---
2 files changed, 81 insertions(+), 5 deletions(-)

diff --git a/arch/mips/ath79/dev-common.c b/arch/mips/ath79/dev-common.c
index 516225d..4f397cb 100644
--- a/arch/mips/ath79/dev-common.c
+++ b/arch/mips/ath79/dev-common.c
@@ -106,3 +106,16 @@ void __init ath79_register_wdt(void)

platform_device_register_simple("ath79-wdt", -1, &res, 1);
}
+
+void __init ath79_gpio_init(void)
+{
+ struct resource res;
+
+ memset(&res, 0, sizeof(res));
+
+ res.flags = IORESOURCE_MEM;
+ res.start = AR71XX_GPIO_BASE;
+ res.end = res.start + AR71XX_GPIO_SIZE - 1;
+
+ platform_device_register_simple("ath79-gpio", -1, &res, 1);
+}
diff --git a/arch/mips/ath79/gpio.c b/arch/mips/ath79/gpio.c
index 8d025b0..ce1a61d 100644
--- a/arch/mips/ath79/gpio.c
+++ b/arch/mips/ath79/gpio.c
@@ -20,6 +20,7 @@
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/gpio.h>
+#include <linux/of_device.h>

#include <asm/mach-ath79/ar71xx_regs.h>
#include <asm/mach-ath79/ath79.h>
@@ -178,11 +179,52 @@ 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",
+ .data = (void *)AR71XX_GPIO_COUNT,
+ },
+ {
+ .compatible = "qca,ar7240-gpio",
+ .data = (void *)AR7240_GPIO_COUNT,
+ },
+ {
+ .compatible = "qca,ar7241-gpio",
+ .data = (void *)AR7241_GPIO_COUNT,
+ },
+ {
+ .compatible = "qca,ar9130-gpio",
+ .data = (void *)AR913X_GPIO_COUNT,
+ },
+ {
+ .compatible = "qca,ar9330-gpio",
+ .data = (void *)AR933X_GPIO_COUNT,
+ },
+ {
+ .compatible = "qca,ar9340-gpio",
+ .data = (void *)AR934X_GPIO_COUNT,
+ },
+ {
+ .compatible = "qca,qca9550-gpio",
+ .data = (void *)QCA955X_GPIO_COUNT,
+ },
+ {},
+};
+
+static int ath79_gpio_probe(struct platform_device *pdev)
{
+ struct resource *res;
int err;

- if (soc_is_ar71xx())
+ if (pdev->dev.of_node) {
+ const struct of_device_id *of_id =
+ of_match_device(ath79_gpio_of_match, &pdev->dev);
+ if (!of_id) {
+ dev_err(&pdev->dev, "Error: No device match found\n");
+ return -ENODEV;
+ }
+ ath79_gpio_count = (unsigned long)of_id->data;
+ } else if (soc_is_ar71xx())
ath79_gpio_count = AR71XX_GPIO_COUNT;
else if (soc_is_ar7240())
ath79_gpio_count = AR7240_GPIO_COUNT;
@@ -199,7 +241,13 @@ void __init ath79_gpio_init(void)
else
BUG();

- ath79_gpio_base = ioremap_nocache(AR71XX_GPIO_BASE, AR71XX_GPIO_SIZE);
+ 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_chip.dev = &pdev->dev;
ath79_gpio_chip.ngpio = ath79_gpio_count;
if (soc_is_ar934x() || soc_is_qca955x()) {
ath79_gpio_chip.direction_input = ar934x_gpio_direction_input;
@@ -207,10 +255,25 @@ void __init ath79_gpio_init(void)
}

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)
--
2.0.0


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