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Date: Thu, 10 Nov 2022 17:20:38 +0100 From: Ricardo Ribalda <ribalda@...omium.org> To: Wolfram Sang <wsa@...nel.org>, Tomasz Figa <tfiga@...omium.org>, "Rafael J. Wysocki" <rafael.j.wysocki@...el.com> Cc: Hidenori Kobayashi <hidenorik@...gle.com>, stable@...r.kernel.org, linux-i2c@...r.kernel.org, Ricardo Ribalda <ribalda@...omium.org>, Sergey Senozhatsky <senozhatsky@...omium.org>, Sakari Ailus <sakari.ailus@...ux.intel.com>, linux-kernel@...r.kernel.org Subject: [PATCH v5 0/1] i2c: Restore power status of device if probe fail or device is removed We have discovered that some power lines were always on even if the devices on that power line was not used. This happens because we failed to probe a device on the i2c bus, and the ACPI Power Resource were never turned off. This patch tries to fix this issue. To: Wolfram Sang <wsa@...nel.org> To: Sakari Ailus <sakari.ailus@...ux.intel.com> To: Tomasz Figa <tfiga@...omium.org> To: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com> Cc: Hidenori Kobayashi <hidenorik@...gle.com> Cc: Sergey Senozhatsky <senozhatsky@...omium.org> Cc: linux-i2c@...r.kernel.org Cc: linux-kernel@...r.kernel.org Cc: stable@...r.kernel.org Signed-off-by: Ricardo Ribalda <ribalda@...omium.org> --- Changes in v5: - Add Cc: stable - Add Reviewed-by Sakary (Thanks!) - Renamed turn-off as power-off, in the name of consistency (Thanks Sergey!) - Link to v4: https://lore.kernel.org/r/20221109-i2c-waive-v4-0-e4496462833b@chromium.org Changes in v4: - Rename full_power to do_power_on - Link to v3: https://lore.kernel.org/r/20221109-i2c-waive-v3-0-d8651cb4b88d@chromium.org Changes in v3: - Introduce full_power variable to make more clear what we are doing. - Link to v2: https://lore.kernel.org/r/20221109-i2c-waive-v2-0-07550bf2dacc@chromium.org Changes in v2: - Cover also device remove - Link to v1: https://lore.kernel.org/r/20221109-i2c-waive-v1-0-ed70a99b990d@chromium.org --- Ricardo Ribalda (1): i2c: Restore initial power state when we are done. drivers/i2c/i2c-core-base.c | 11 +++++++---- include/linux/i2c.h | 4 ++++ 2 files changed, 11 insertions(+), 4 deletions(-) --- base-commit: f141df371335645ce29a87d9683a3f79fba7fd67 change-id: 20221109-i2c-waive-ae97fea1f1b5 Best regards, -- Ricardo Ribalda <ribalda@...omium.org>
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