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Date: Fri, 14 Jun 2024 12:04:29 +0200
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Thomas Weißschuh <thomas@...ssschuh.net>,
Pavel Machek <pavel@....cz>, Lee Jones <lee@...nel.org>,
Benson Leung <bleung@...omium.org>, Guenter Roeck <groeck@...omium.org>
Cc: linux-leds@...r.kernel.org, chrome-platform@...ts.linux.dev,
linux-kernel@...r.kernel.org,
Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH] leds: cros_ec: Implement review comments from Lee
Implement review comments from Lee as requested in [0] for
"leds: Add ChromeOS EC driver".
Changes:
* Inline DRV_NAME string constant.
* Use dev_err() instead of dev_warn() to report errors.
* Rename cros_ec_led_probe_led() to cros_ec_led_probe_one().
* Make loop variable "int" where they belong.
* Move "Unknown LED" comment to where it belongs.
* Register trigger during _probe().
* Use module_platform_driver() and drop all the custom boilerplate.
[0] https://lore.kernel.org/lkml/20240614093445.GF3029315@google.com/T/#m8750abdef6a968ace765645189170814196c9ce9
Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
drivers/leds/leds-cros_ec.c | 50 +++++++++++++--------------------------------
1 file changed, 14 insertions(+), 36 deletions(-)
diff --git a/drivers/leds/leds-cros_ec.c b/drivers/leds/leds-cros_ec.c
index 7bb21a587713..275522b81ea5 100644
--- a/drivers/leds/leds-cros_ec.c
+++ b/drivers/leds/leds-cros_ec.c
@@ -14,8 +14,6 @@
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
-#define DRV_NAME "cros-ec-led"
-
static const char * const cros_ec_led_functions[] = {
[EC_LED_ID_BATTERY_LED] = LED_FUNCTION_CHARGING,
[EC_LED_ID_POWER_LED] = LED_FUNCTION_POWER,
@@ -152,7 +150,7 @@ static int cros_ec_led_count_subleds(struct device *dev,
if (common_range != range) {
/* The multicolor LED API expects a uniform max_brightness */
- dev_warn(dev, "Inconsistent LED brightness values\n");
+ dev_err(dev, "Inconsistent LED brightness values\n");
return -EINVAL;
}
}
@@ -176,22 +174,21 @@ static const char *cros_ec_led_get_color_name(struct led_classdev_mc *led_mc_cde
return led_get_color_name(color);
}
-static int cros_ec_led_probe_led(struct device *dev, struct cros_ec_device *cros_ec,
+static int cros_ec_led_probe_one(struct device *dev, struct cros_ec_device *cros_ec,
enum ec_led_id id)
{
union cros_ec_led_cmd_data arg = {};
struct cros_ec_led_priv *priv;
struct led_classdev *led_cdev;
struct mc_subled *subleds;
- int ret, num_subleds;
- size_t i, subled;
+ int i, ret, num_subleds;
+ size_t subled;
arg.req.led_id = id;
arg.req.flags = EC_LED_FLAGS_QUERY;
ret = cros_ec_led_send_cmd(cros_ec, &arg);
- /* Unknown LED, skip */
if (ret == -EINVAL)
- return 0;
+ return 0; /* Unknown LED, skip */
if (ret == -EOPNOTSUPP)
return -ENODEV;
if (ret < 0)
@@ -247,11 +244,14 @@ static int cros_ec_led_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct cros_ec_dev *ec_dev = dev_get_drvdata(dev->parent);
struct cros_ec_device *cros_ec = ec_dev->ec_dev;
- int ret = 0;
- size_t i;
+ int i, ret = 0;
+
+ ret = devm_led_trigger_register(dev, &cros_ec_led_trigger);
+ if (ret)
+ return ret;
for (i = 0; i < EC_LED_ID_COUNT; i++) {
- ret = cros_ec_led_probe_led(dev, cros_ec, i);
+ ret = cros_ec_led_probe_one(dev, cros_ec, i);
if (ret)
break;
}
@@ -260,38 +260,16 @@ static int cros_ec_led_probe(struct platform_device *pdev)
}
static const struct platform_device_id cros_ec_led_id[] = {
- { DRV_NAME, 0 },
+ { "cros-ec-led", 0 },
{}
};
static struct platform_driver cros_ec_led_driver = {
- .driver.name = DRV_NAME,
+ .driver.name = "cros-ec-led",
.probe = cros_ec_led_probe,
.id_table = cros_ec_led_id,
};
-
-static int __init cros_ec_led_init(void)
-{
- int ret;
-
- ret = led_trigger_register(&cros_ec_led_trigger);
- if (ret)
- return ret;
-
- ret = platform_driver_register(&cros_ec_led_driver);
- if (ret)
- led_trigger_unregister(&cros_ec_led_trigger);
-
- return ret;
-};
-module_init(cros_ec_led_init);
-
-static void __exit cros_ec_led_exit(void)
-{
- platform_driver_unregister(&cros_ec_led_driver);
- led_trigger_unregister(&cros_ec_led_trigger);
-};
-module_exit(cros_ec_led_exit);
+module_platform_driver(cros_ec_led_driver);
MODULE_DEVICE_TABLE(platform, cros_ec_led_id);
MODULE_DESCRIPTION("ChromeOS EC LED Driver");
---
base-commit: b6774dd948171c478c7aa19318b1d7ae9cf6d7a4
change-id: 20240614-cros_ec-led-review-ec93abc65933
Best regards,
--
Thomas Weißschuh <linux@...ssschuh.net>
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