| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20230201054815.4112632-1-dmitry.torokhov@gmail.com>
Date: Tue, 31 Jan 2023 21:48:13 -0800
From: Dmitry Torokhov <dmitry.torokhov@...il.com>
To: Alessandro Zummo <a.zummo@...ertech.it>,
Alexandre Belloni <alexandre.belloni@...tlin.com>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc: Arnd Bergmann <arnd@...db.de>, linux-rtc@...r.kernel.org,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: [PATCH 1/3] rtc: moxart: switch to using gpiod API
Switch the driver from legacy gpio API that is deprecated to the newer
gpiod API that respects line polarities described in ACPI/DT.
This makes driver use standard property name for its gpios
("rtc-*-gpios" vs "gpios-rtc-*"), however there is a quirk in gpiolib
to also recognize legacy names and keep compatibility with older DTSes:
eaf1a29665cd ("gpiolib: of: add a quirk for legacy names in MOXA ART
RTC").
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
---
drivers/rtc/rtc-moxart.c | 89 ++++++++++++++++------------------------
1 file changed, 36 insertions(+), 53 deletions(-)
diff --git a/drivers/rtc/rtc-moxart.c b/drivers/rtc/rtc-moxart.c
index 6b24ac9e1cfa..2247dd39ee4b 100644
--- a/drivers/rtc/rtc-moxart.c
+++ b/drivers/rtc/rtc-moxart.c
@@ -10,14 +10,15 @@
* Moxa Technology Co., Ltd. <www.moxa.com>
*/
+#include <linux/err.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/rtc.h>
#include <linux/platform_device.h>
#include <linux/module.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
+#include <linux/mod_devicetable.h>
+#include <linux/gpio/consumer.h>
#define GPIO_RTC_RESERVED 0x0C
#define GPIO_RTC_DATA_SET 0x10
@@ -55,7 +56,9 @@
struct moxart_rtc {
struct rtc_device *rtc;
spinlock_t rtc_lock;
- int gpio_data, gpio_sclk, gpio_reset;
+ struct gpio_desc *gpio_data;
+ struct gpio_desc *gpio_sclk;
+ struct gpio_desc *gpio_reset;
};
static int day_of_year[12] = { 0, 31, 59, 90, 120, 151, 181,
@@ -67,10 +70,10 @@ 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 +85,11 @@ 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 +104,15 @@ 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 +127,13 @@ 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);
@@ -247,53 +250,33 @@ static int moxart_rtc_probe(struct platform_device *pdev)
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;
- }
-
- 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");
+ moxart_rtc->gpio_data = devm_gpiod_get(&pdev->dev, "rtc-data",
+ GPIOD_IN);
+ ret = PTR_ERR_OR_ZERO(moxart_rtc->gpio_data);
if (ret) {
- dev_err(&pdev->dev, "can't get rtc_data gpio\n");
+ dev_err(&pdev->dev, "can't get rtc data gpio: %d\n", ret);
return ret;
}
- ret = devm_gpio_request_one(&pdev->dev, moxart_rtc->gpio_sclk,
- GPIOF_DIR_OUT, "rtc_sclk");
+ moxart_rtc->gpio_sclk = devm_gpiod_get(&pdev->dev, "rtc-sclk",
+ GPIOD_ASIS);
+ ret = PTR_ERR_OR_ZERO(moxart_rtc->gpio_sclk);
if (ret) {
- dev_err(&pdev->dev, "can't get rtc_sclk gpio\n");
+ dev_err(&pdev->dev, "can't get rtc sclk gpio: %d\n", ret);
return ret;
}
- ret = devm_gpio_request_one(&pdev->dev, moxart_rtc->gpio_reset,
- GPIOF_DIR_OUT, "rtc_reset");
+ moxart_rtc->gpio_reset = devm_gpiod_get(&pdev->dev, "rtc-reset",
+ GPIOD_ASIS);
+ ret = PTR_ERR_OR_ZERO(moxart_rtc->gpio_reset);
if (ret) {
- dev_err(&pdev->dev, "can't get rtc_reset gpio\n");
+ dev_err(&pdev->dev, "can't get rtc reset gpio: %d\n", ret);
return ret;
}
+ spin_lock_init(&moxart_rtc->rtc_lock);
+ platform_set_drvdata(pdev, moxart_rtc);
+
moxart_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
&moxart_rtc_ops,
THIS_MODULE);
--
2.39.1.456.gfc5497dd1b-goog
Powered by blists - more mailing lists