This patch switches the driver from legacy gpio API to the newer
gpiod API.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
Note that the original version was using "gpio-reset" to look up gpio,
while this one will be using "reset-gpios" and "reset-gpio". However I
do not see any users of this driver in mainline kernel that are using
reset gpio functionality, so maybe it is OK?
If compatibility with existing DTSes is absolutely necessary I can make
a patch that will add needed quirk to drivers/gpio/gpiolib-of.c.
Please let me know.
arch/mips/pci/pci-lantiq.c | 27 ++++++++++++---------------
1 file changed, 12 insertions(+), 15 deletions(-)
diff --git a/arch/mips/pci/pci-lantiq.c b/arch/mips/pci/pci-lantiq.c
index 1ca42f482130..377b4a2577e1 100644
--- a/arch/mips/pci/pci-lantiq.c
+++ b/arch/mips/pci/pci-lantiq.c
@@ -9,11 +9,11 @@
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
#include <linux/mm.h>
#include <linux/vmalloc.h>
#include <linux/clk.h>
#include <linux/of_platform.h>
-#include <linux/of_gpio.h>
#include <linux/of_irq.h>
#include <linux/of_pci.h>
@@ -62,7 +62,7 @@
__iomem void *ltq_pci_mapped_cfg;
static __iomem void *ltq_pci_membase;
-static int reset_gpio;
+static gpio_desc *reset_gpio;
static struct clk *clk_pci, *clk_external;
static struct resource pci_io_resource;
static struct resource pci_mem_resource;
@@ -123,17 +123,14 @@ static int ltq_pci_startup(struct platform_device *pdev)
clk_disable(clk_external);
/* setup reset gpio used by pci */
- reset_gpio = of_get_named_gpio(node, "gpio-reset", 0);
- if (gpio_is_valid(reset_gpio)) {
- int ret = devm_gpio_request(&pdev->dev,
- reset_gpio, "pci-reset");
- if (ret) {
- dev_err(&pdev->dev,
- "failed to request gpio %d\n", reset_gpio);
- return ret;
- }
- gpio_direction_output(reset_gpio, 1);
+ reset_gpio = devm_gpiod_get_optional(&pdev->dev, "reset",
+ GPIOD_OUT_LOW);
+ ret = PTR_ERR_OR_ZERO(reset_gpio);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request gpio: %d\n", ret);
+ return ret;
}
+ gpiod_set_consumer_name(reset_gpio, "pci_reset");
/* enable auto-switching between PCI and EBU */
ltq_pci_w32(0xa, PCI_CR_CLK_CTRL);
@@ -195,11 +192,11 @@ static int ltq_pci_startup(struct platform_device *pdev)
ltq_ebu_w32(ltq_ebu_r32(LTQ_EBU_PCC_IEN) | 0x10, LTQ_EBU_PCC_IEN);
/* toggle reset pin */
- if (gpio_is_valid(reset_gpio)) {
- __gpio_set_value(reset_gpio, 0);
+ if (reset_gpio) {
+ gpiod_set_value_cansleep(reset_gpio, 1);
wmb();
mdelay(1);
- __gpio_set_value(reset_gpio, 1);
+ gpiod_set_value_cansleep(reset_gpio, 0);
}
return 0;
}
--
2.37.3.998.g577e59143f-goog
--
Dmitry
