linux-stable.git/drivers/power/reset, branch linux-5.10.y

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

2026-03-04T12:19:37+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()

2025-06-27T10:04:01+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

2024-10-17T13:08:14+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

2022-07-29T15:19:10+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

2022-04-08T12:40:14+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

2022-01-27T09:54:00+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

2022-01-11T14:25:01+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: gpio-poweroff: add missing MODULE_DEVICE_TABLE

2021-07-20T14:05:47+00:00

[ Upstream commit ed3443fb4df4e140a22f65144546c8a8e1e27f4e ]

This patch adds missing MODULE_DEVICE_TABLE definition which generates
correct modalias for automatic loading of this driver when it is built
as an external module.

Reported-by: Hulk Robot 
Signed-off-by: Bixuan Cui 
Signed-off-by: Sebastian Reichel 
Signed-off-by: Sasha Levin

power: reset: at91-sama5d2_shdwc: fix wkupdbc mask

2021-03-04T10:37:57+00:00

[ Upstream commit 95aa21a3f1183260db1b0395e03df5bebc5ed641 ]

According to datasheet WKUPDBC mask is b/w bits 26..24.

Fixes: f80cb48843987 ("power: reset: at91-shdwc: add new shutdown controller driver")
Signed-off-by: Claudiu Beznea 
Reviewed-by: Alexandre Belloni 
Signed-off-by: Sebastian Reichel 
Signed-off-by: Sasha Levin

power: reset: POWER_RESET_OCELOT_RESET should depend on Ocelot or Sparx5

2020-10-15T19:37:59+00:00

To add support for Sparx5, the dependency on MSCC_OCELOT was removed.
However, this increases exposure of the driver question not only to
Sparx5 platforms, but to everyone.  Hence re-add the dependency on
MSCC_OCELOT, and extend it with ARCH_SPARX5, to prevent asking the user
about this driver when configuring a kernel without Ocelot and Sparx5
support.

Fixes: ec871696b7776767 ("power: reset: ocelot: Add support for Sparx5")
Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Sebastian Reichel