kernel/linux.git/drivers/platform/chrome/cros_ec_sysfs.c, branch linux-7.1.y

platform/chrome: cros_ec_sysfs: Expose AP_MODE_ENTRY feature state

2025-02-05T04:03:31+00:00

This adds sysfs attribute /sys/class/chromeos/cros_ec/ap_mode_entry to expose the status of the AP_MODE_ENTRY feature. This attribute indicate whether the EC requires direction from the Application Processor (AP) before entering Type-C alternate modes or USB4 mode. This allows user-space applications to easily determine if the AP needs to be involved in mode entry. Signed-off-by: Andrei Kuchynski Link: https://lore.kernel.org/r/20250203125947.2701106-3-akuchynski@chromium.org Signed-off-by: Tzung-Bi Shih

platform/chrome: cros_ec_sysfs: Expose PD mux status

2025-02-05T04:02:27+00:00

This adds sysfs attribute /sys/class/chromeos/cros_ec/usbpdmuxinfo to expose the PD mux status for each Type-C port. This allows user-space applications to easily determine the current mux state without using ioctls. Signed-off-by: Andrei Kuchynski Link: https://lore.kernel.org/r/20250203125947.2701106-2-akuchynski@chromium.org Signed-off-by: Tzung-Bi Shih

platform/chrome: Switch back to struct platform_driver::remove()

2024-10-28T08:48:34+00:00

After commit 0edb555a65d1 ("platform: Make platform_driver::remove() return void") .remove() is (again) the right callback to implement for platform drivers. Convert all platform drivers below drivers/platform/chrome to use .remove(), with the eventual goal to drop struct platform_driver::remove_new(). As .remove() and .remove_new() have the same prototypes, conversion is done by just changing the structure member name in the driver initializer. Signed-off-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20241028082611.431723-2-u.kleine-koenig@baylibre.com Signed-off-by: Tzung-Bi Shih

platform/chrome: cros_ec_sysfs: provide ID table for avoiding fallback match

2024-04-24T08:45:57+00:00

Instead of using fallback driver name match, provide ID table[1] for the primary match. [1]: https://elixir.bootlin.com/linux/v6.8/source/drivers/base/platform.c#L1353 Reviewed-by: Benson Leung Reviewed-by: Krzysztof Kozlowski Link: https://lore.kernel.org/r/20240329075630.2069474-11-tzungbi@kernel.org Signed-off-by: Tzung-Bi Shih

platform/chrome: cros_ec_sysfs: Convert to platform remove callback returning void

2023-09-28T05:18:06+00:00

The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new(), which already returns void. Eventually after all drivers are converted, .remove_new() will be renamed to .remove(). Trivially convert this driver from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König Link: https://lore.kernel.org/r/20230927081040.2198742-6-u.kleine-koenig@pengutronix.de Signed-off-by: Tzung-Bi Shih

platform/chrome: use sysfs_emit_at() instead of scnprintf()

2022-12-26T08:14:53+00:00

Follow the advice in Documentation/filesystems/sysfs.rst: show() should only use sysfs_emit() or sysfs_emit_at() when formatting the value to be returned to user space. Signed-off-by: Tzung-Bi Shih Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20221205061042.1774769-1-tzungbi@kernel.org

platform/chrome: use sysfs_emit() instead of scnprintf()

2022-12-26T03:14:34+00:00

Follow the advice in Documentation/filesystems/sysfs.rst: show() should only use sysfs_emit() or sysfs_emit_at() when formatting the value to be returned to user space. Signed-off-by: ye xingchen Link: https://lore.kernel.org/r/202212021656040995199@zte.com.cn [tzungbi: fixed the commit message.] Signed-off-by: Tzung-Bi Shih

platform/chrome: cros_ec_sysfs: Add cold-ap-off to sysfs reboot.

2021-01-20T15:19:17+00:00

Add cold-ap-off to ChromeOS EC sysfs reboot file option, corresponds to the EC_REBOOT_COLD_AP_OFF flag, that will reset EC and keep AP off. Signed-off-by: Pi-Hsun Shih Signed-off-by: Enric Balletbo i Serra Link: https://lore.kernel.org/r/20201221041231.14516-2-pihsun@chromium.org

platform/chrome: Constify static attribute_group structs

2021-01-20T15:19:17+00:00

The only usage of these is to print their name in a dev_err-message, and to pass their address to sysfs_create_group() and sysfs_remove_group(), both which takes pointers to const. Make them const to allow the compiler to put them in read-only memory. Signed-off-by: Rikard Falkeborn Signed-off-by: Enric Balletbo i Serra Link: https://lore.kernel.org/r/20210109001748.58036-1-rikard.falkeborn@gmail.com

platform/chrome: Use kobj_to_dev() instead of container_of()

2020-09-29T08:08:44+00:00

Use kobj_to_dev() instead of container_of(). Signed-off-by: Wang Qing Reviewed-by: Guenter Roeck Signed-off-by: Enric Balletbo i Serra