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Date: Mon, 30 Jan 2023 14:10:20 +0100
From: Arnd Bergmann <arnd@...nel.org>
To: Alessandro Zummo <a.zummo@...ertech.it>,
Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc: Arnd Bergmann <arnd@...db.de>, linux-rtc@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] rtc: moxart: convert to gpio descriptors
From: Arnd Bergmann <arnd@...db.de>
The conversion is fairly simple as the driver only has DT based
probing, and all the gpio calls have a direct replacement.
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
drivers/rtc/rtc-moxart.c | 100 +++++++++++++++------------------------
1 file changed, 38 insertions(+), 62 deletions(-)
diff --git a/drivers/rtc/rtc-moxart.c b/drivers/rtc/rtc-moxart.c
index 6b24ac9e1cfa..6537351c5dad 100644
--- a/drivers/rtc/rtc-moxart.c
+++ b/drivers/rtc/rtc-moxart.c
@@ -16,8 +16,8 @@
#include <linux/rtc.h>
#include <linux/platform_device.h>
#include <linux/module.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/of.h>
#define GPIO_RTC_RESERVED 0x0C
#define GPIO_RTC_DATA_SET 0x10
@@ -55,7 +55,7 @@
struct moxart_rtc {
struct rtc_device *rtc;
spinlock_t rtc_lock;
- int gpio_data, gpio_sclk, gpio_reset;
+ struct gpio_desc *gpio_data, *gpio_sclk, *gpio_reset;
};
static int day_of_year[12] = { 0, 31, 59, 90, 120, 151, 181,
@@ -67,10 +67,10 @@ static void moxart_rtc_write_byte(struct device *dev, u8 data)
int i;
for (i = 0; i < 8; i++, data >>= 1) {
- gpio_set_value(moxart_rtc->gpio_sclk, 0);
- gpio_set_value(moxart_rtc->gpio_data, ((data & 1) == 1));
+ gpiod_set_value(moxart_rtc->gpio_sclk, 0);
+ gpiod_set_value(moxart_rtc->gpio_data, ((data & 1) == 1));
udelay(GPIO_RTC_DELAY_TIME);
- gpio_set_value(moxart_rtc->gpio_sclk, 1);
+ gpiod_set_value(moxart_rtc->gpio_sclk, 1);
udelay(GPIO_RTC_DELAY_TIME);
}
}
@@ -82,11 +82,11 @@ static u8 moxart_rtc_read_byte(struct device *dev)
u8 data = 0;
for (i = 0; i < 8; i++) {
- gpio_set_value(moxart_rtc->gpio_sclk, 0);
+ gpiod_set_value(moxart_rtc->gpio_sclk, 0);
udelay(GPIO_RTC_DELAY_TIME);
- gpio_set_value(moxart_rtc->gpio_sclk, 1);
+ gpiod_set_value(moxart_rtc->gpio_sclk, 1);
udelay(GPIO_RTC_DELAY_TIME);
- if (gpio_get_value(moxart_rtc->gpio_data))
+ if (gpiod_get_value(moxart_rtc->gpio_data))
data |= (1 << i);
udelay(GPIO_RTC_DELAY_TIME);
}
@@ -101,15 +101,15 @@ static u8 moxart_rtc_read_register(struct device *dev, u8 cmd)
local_irq_save(flags);
- gpio_direction_output(moxart_rtc->gpio_data, 0);
- gpio_set_value(moxart_rtc->gpio_reset, 1);
+ gpiod_direction_output(moxart_rtc->gpio_data, 0);
+ gpiod_set_value(moxart_rtc->gpio_reset, 1);
udelay(GPIO_RTC_DELAY_TIME);
moxart_rtc_write_byte(dev, cmd);
- gpio_direction_input(moxart_rtc->gpio_data);
+ gpiod_direction_input(moxart_rtc->gpio_data);
udelay(GPIO_RTC_DELAY_TIME);
data = moxart_rtc_read_byte(dev);
- gpio_set_value(moxart_rtc->gpio_sclk, 0);
- gpio_set_value(moxart_rtc->gpio_reset, 0);
+ gpiod_set_value(moxart_rtc->gpio_sclk, 0);
+ gpiod_set_value(moxart_rtc->gpio_reset, 0);
udelay(GPIO_RTC_DELAY_TIME);
local_irq_restore(flags);
@@ -124,13 +124,13 @@ static void moxart_rtc_write_register(struct device *dev, u8 cmd, u8 data)
local_irq_save(flags);
- gpio_direction_output(moxart_rtc->gpio_data, 0);
- gpio_set_value(moxart_rtc->gpio_reset, 1);
+ gpiod_direction_output(moxart_rtc->gpio_data, 0);
+ gpiod_set_value(moxart_rtc->gpio_reset, 1);
udelay(GPIO_RTC_DELAY_TIME);
moxart_rtc_write_byte(dev, cmd);
moxart_rtc_write_byte(dev, data);
- gpio_set_value(moxart_rtc->gpio_sclk, 0);
- gpio_set_value(moxart_rtc->gpio_reset, 0);
+ gpiod_set_value(moxart_rtc->gpio_sclk, 0);
+ gpiod_set_value(moxart_rtc->gpio_reset, 0);
udelay(GPIO_RTC_DELAY_TIME);
local_irq_restore(flags);
@@ -241,59 +241,35 @@ static const struct rtc_class_ops moxart_rtc_ops = {
static int moxart_rtc_probe(struct platform_device *pdev)
{
struct moxart_rtc *moxart_rtc;
- int ret = 0;
moxart_rtc = devm_kzalloc(&pdev->dev, sizeof(*moxart_rtc), GFP_KERNEL);
if (!moxart_rtc)
return -ENOMEM;
- moxart_rtc->gpio_data = of_get_named_gpio(pdev->dev.of_node,
- "gpio-rtc-data", 0);
- if (!gpio_is_valid(moxart_rtc->gpio_data)) {
- dev_err(&pdev->dev, "invalid gpio (data): %d\n",
- moxart_rtc->gpio_data);
- return moxart_rtc->gpio_data;
- }
-
- moxart_rtc->gpio_sclk = of_get_named_gpio(pdev->dev.of_node,
- "gpio-rtc-sclk", 0);
- if (!gpio_is_valid(moxart_rtc->gpio_sclk)) {
- dev_err(&pdev->dev, "invalid gpio (sclk): %d\n",
- moxart_rtc->gpio_sclk);
- return moxart_rtc->gpio_sclk;
- }
-
- moxart_rtc->gpio_reset = of_get_named_gpio(pdev->dev.of_node,
- "gpio-rtc-reset", 0);
- if (!gpio_is_valid(moxart_rtc->gpio_reset)) {
- dev_err(&pdev->dev, "invalid gpio (reset): %d\n",
- moxart_rtc->gpio_reset);
- return moxart_rtc->gpio_reset;
- }
+ moxart_rtc->gpio_data = devm_gpiod_get(&pdev->dev, "gpio-rtc-data",
+ GPIOD_IN);
+ if (IS_ERR(moxart_rtc->gpio_data))
+ return dev_err_probe(&pdev->dev,
+ PTR_ERR(moxart_rtc->gpio_data),
+ "invalid gpio (data)");
+
+ moxart_rtc->gpio_sclk = devm_gpiod_get(&pdev->dev, "gpio-rtc-sclk",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(moxart_rtc->gpio_sclk))
+ return dev_err_probe(&pdev->dev,
+ PTR_ERR(moxart_rtc->gpio_sclk),
+ "invalid gpio (sclk)");
+
+ moxart_rtc->gpio_reset = devm_gpiod_get(&pdev->dev, "gpio-rtc-reset",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(moxart_rtc->gpio_reset))
+ return dev_err_probe(&pdev->dev,
+ PTR_ERR(moxart_rtc->gpio_reset),
+ "invalid gpio (reset)\n");
spin_lock_init(&moxart_rtc->rtc_lock);
platform_set_drvdata(pdev, moxart_rtc);
- ret = devm_gpio_request(&pdev->dev, moxart_rtc->gpio_data, "rtc_data");
- if (ret) {
- dev_err(&pdev->dev, "can't get rtc_data gpio\n");
- return ret;
- }
-
- ret = devm_gpio_request_one(&pdev->dev, moxart_rtc->gpio_sclk,
- GPIOF_DIR_OUT, "rtc_sclk");
- if (ret) {
- dev_err(&pdev->dev, "can't get rtc_sclk gpio\n");
- return ret;
- }
-
- ret = devm_gpio_request_one(&pdev->dev, moxart_rtc->gpio_reset,
- GPIOF_DIR_OUT, "rtc_reset");
- if (ret) {
- dev_err(&pdev->dev, "can't get rtc_reset gpio\n");
- return ret;
- }
-
moxart_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
&moxart_rtc_ops,
THIS_MODULE);
--
2.39.0
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