kernel/linux.git/drivers/power/reset, branch v5.15.209

power: reset: nvmem-reboot-mode: respect cell size for nvmem_cell_write

2026-03-04T12:19:40+00:00

[ Upstream commit 36b05629226413836cfbb3fbe6689cd188bca156 ] Some platforms expose reboot mode cells that are smaller than an unsigned int, in which cases lead to write failures. Read the cell first to determine actual size and only write the number of bytes the cell can hold. Fixes: 7a78a7f7695b ("power: reset: nvmem-reboot-mode: use NVMEM as reboot mode write interface") Signed-off-by: Alexander Koskovich Link: https://patch.msgid.link/20251214191529.2470580-1-akoskovich@pm.me Signed-off-by: Sebastian Reichel Signed-off-by: Sasha Levin

power: reset: at91-reset: Optimize at91_reset()

2025-06-27T10:05:10+00:00

[ Upstream commit 62d48983f215bf1dd48665913318101fa3414dcf ] This patch adds a small optimization to the low-level at91_reset() function, which includes: - Removes the extra branch, since the following store operations already have proper condition checks. - Removes the definition of the clobber register r4, since it is no longer used in the code. Fixes: fcd0532fac2a ("power: reset: at91-reset: make at91sam9g45_restart() generic") Signed-off-by: Alexander Shiyan Reviewed-by: Alexandre Belloni Link: https://lore.kernel.org/r/20250307053809.20245-1-eagle.alexander923@gmail.com Signed-off-by: Sebastian Reichel Signed-off-by: Sasha Levin

power: reset: brcmstb: Do not go into infinite loop if reset fails

2024-10-17T13:11:29+00:00

[ Upstream commit cf8c39b00e982fa506b16f9d76657838c09150cb ] There may be other backup reset methods available, do not halt here so that other reset methods can be tried. Signed-off-by: Andrew Davis Reviewed-by: Dhruva Gole Acked-by: Florian Fainelli Link: https://lore.kernel.org/r/20240610142836.168603-5-afd@ti.com Signed-off-by: Sebastian Reichel Signed-off-by: Sasha Levin

power/reset: arm-versatile: Fix refcount leak in versatile_reboot_probe

2022-07-29T15:25:10+00:00

[ Upstream commit 80192eff64eee9b3bc0594a47381937b94b9d65a ] of_find_matching_node_and_match() returns a node pointer with refcount incremented, we should use of_node_put() on it when not need anymore. Add missing of_node_put() to avoid refcount leak. Fixes: 0e545f57b708 ("power: reset: driver for the Versatile syscon reboot") Signed-off-by: Miaoqian Lin Reviewed-by: Linus Walleij Signed-off-by: Sebastian Reichel Signed-off-by: Sasha Levin

power: reset: gemini-poweroff: Fix IRQ check in gemini_poweroff_probe

2022-04-08T12:23:27+00:00

[ Upstream commit ba18dad0fb880cd29aa97b6b75560ef14d1061ba ] platform_get_irq() returns negative error number instead 0 on failure. And the doc of platform_get_irq() provides a usage example: int irq = platform_get_irq(pdev, 0); if (irq < 0) return irq; Fix the check of return value to catch errors correctly. Fixes: f7a388d6cd1c ("power: reset: Add a driver for the Gemini poweroff") Signed-off-by: Miaoqian Lin Reviewed-by: Linus Walleij Signed-off-by: Sebastian Reichel Signed-off-by: Sasha Levin

power: reset: mt6397: Check for null res pointer

2022-01-27T10:03:49+00:00

[ Upstream commit 1c1348bf056dee665760a3bd1cd30b0be7554fc2 ] The return value of platform_get_resource() needs to be checked. To avoid use of error pointer in case that there is no suitable resource. Fixes: d28c74c10751 ("power: reset: add driver for mt6323 poweroff") Signed-off-by: Jiasheng Jiang Signed-off-by: Sebastian Reichel Signed-off-by: Sasha Levin

power: reset: ltc2952: Fix use of floating point literals

2022-01-11T14:35:16+00:00

commit 644106cdb89844be2496b21175b7c0c2e0fab381 upstream. A new commit in LLVM causes an error on the use of 'long double' when '-mno-x87' is used, which the kernel does through an alias, '-mno-80387' (see the LLVM commit below for more details around why it does this). drivers/power/reset/ltc2952-poweroff.c:162:28: error: expression requires 'long double' type support, but target 'x86_64-unknown-linux-gnu' does not support it data->wde_interval = 300L * 1E6L; ^ drivers/power/reset/ltc2952-poweroff.c:162:21: error: expression requires 'long double' type support, but target 'x86_64-unknown-linux-gnu' does not support it data->wde_interval = 300L * 1E6L; ^ drivers/power/reset/ltc2952-poweroff.c:163:41: error: expression requires 'long double' type support, but target 'x86_64-unknown-linux-gnu' does not support it data->trigger_delay = ktime_set(2, 500L*1E6L); ^ 3 errors generated. This happens due to the use of a 'long double' literal. The 'E6' part of '1E6L' causes the literal to be a 'double' then the 'L' suffix promotes it to 'long double'. There is no visible reason for floating point values in this driver, as the values are only assigned to integer types. Use NSEC_PER_MSEC, which is the same integer value as '1E6L', to avoid changing functionality but fix the error. Fixes: 6647156c00cc ("power: reset: add LTC2952 poweroff driver") Link: https://github.com/ClangBuiltLinux/linux/issues/1497 Link: https://github.com/llvm/llvm-project/commit/a8083d42b1c346e21623a1d36d1f0cadd7801d83 Signed-off-by: Nathan Chancellor Reviewed-by: Nick Desaulniers Signed-off-by: Sebastian Reichel Signed-off-by: Greg Kroah-Hartman

power: reset: at91-reset: check properly the return value of devm_of_iomap

2021-11-18T18:16:49+00:00

[ Upstream commit f558c8072c3461b65c12c0068b108f78cebc8246 ] devm_of_iomap() returns error code or valid pointer. Check its return value with IS_ERR(). Fixes: bd3127733f2c ("power: reset: at91-reset: use devm_of_iomap") Reported-by: Cristian Birsan Signed-off-by: Claudiu Beznea Signed-off-by: Sebastian Reichel Signed-off-by: Sasha Levin

power: reset: Add TPS65086 restart driver

2021-08-16T12:48:51+00:00

The only way to reset the BeagleV Starlight v0.9 board[1] properly is to tell the PMIC to reset itself which will then assert the external reset lines of the SoC, USB hub and ethernet phy. This adds a driver to register a reset handler to do just that. [1] https://github.com/beagleboard/beaglev-starlight Signed-off-by: Emil Renner Berthing Signed-off-by: Sebastian Reichel

power: reset: linkstation-poweroff: add new device

2021-08-13T17:16:41+00:00

This commit introduces support for NETGEAR ReadyNAS Duo v2. This device use bit 4 of LED[2:0] Polarity Control Register to indicate AC Power loss. For more details about AC loss detection in NETGEAR ReadyNAS Duo v2, please look at the file: RND_5.3.13_WW.src/u-boot/board/mv_feroceon/mv_hal/usibootup/usibootup.c from Netgear GPL sources. Signed-off-by: Pawel Dembicki Signed-off-by: Sebastian Reichel