kernel/git/stable/linux.git/drivers/soc/microchip, branch linux-6.19.y

soc: microchip: mpfs-mss-top-sysreg: Fix resource leak on driver unbind

2026-04-22T11:30:35+00:00

[ Upstream commit 3bfc213d4675736567a4e263c51c25144d565949 ] Use devm_mfd_add_devices() instead of mfd_add_devices() to ensure child devices are properly removed when the driver unbinds. Fixes: 4aac11c9a6e7 ("soc: microchip: add mfd drivers for two syscon regions on PolarFire SoC") Signed-off-by: Felix Gu Signed-off-by: Conor Dooley Signed-off-by: Sasha Levin

soc: microchip: mpfs-control-scb: Fix resource leak on driver unbind

2026-04-22T11:30:35+00:00

[ Upstream commit 27459f86a43792d5c29f267a41dbd387601e772b ] Use devm_mfd_add_devices() instead of mfd_add_devices() to ensure child devices are properly removed when the driver unbinds. Fixes: 4aac11c9a6e7 ("soc: microchip: add mfd drivers for two syscon regions on PolarFire SoC") Signed-off-by: Felix Gu Signed-off-by: Conor Dooley Signed-off-by: Sasha Levin

soc: microchip: mpfs: Fix memory leak in mpfs_sys_controller_probe()

2026-03-25T10:13:23+00:00

[ Upstream commit 5a741f8cc6fe62542f955cd8d24933a1b6589cbd ] In mpfs_sys_controller_probe(), if of_get_mtd_device_by_node() fails, the function returns immediately without freeing the allocated memory for sys_controller, leading to a memory leak. Fix this by jumping to the out_free label to ensure the memory is properly freed. Also, consolidate the error handling for the mbox_request_channel() failure case to use the same label. Fixes: 742aa6c563d2 ("soc: microchip: mpfs: enable access to the system controller's flash") Co-developed-by: Jianhao Xu Signed-off-by: Jianhao Xu Signed-off-by: Zilin Guan Signed-off-by: Conor Dooley Signed-off-by: Sasha Levin

soc: microchip: add mfd drivers for two syscon regions on PolarFire SoC

2025-10-29T16:22:37+00:00

The control-scb and mss-top-sysreg regions on PolarFire SoC both fulfill multiple purposes. The former is used for mailbox functions in addition to the temperature & voltage sensor while the latter is used for clocks, resets, interrupt muxing and pinctrl. Signed-off-by: Conor Dooley

soc: Switch back to struct platform_driver::remove()

2024-11-01T16:08:57+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/soc 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. On the way do a few whitespace changes to make indention consistent. Signed-off-by: Uwe Kleine-König Acked-by: Heiko Stuebner Acked-by: Herve Codina # for fsl/qe/{qmc,tsa}.c Acked-by: Bjorn Andersson # qcom parts Acked-by: Gabriel Somlo Acked-by: Andrew Jeffery # aspeed Link: https://lore.kernel.org/r/20241029074859.509587-2-u.kleine-koenig@baylibre.com Signed-off-by: Arnd Bergmann

soc: microchip: Fix POLARFIRE_SOC_SYS_CTRL input prompt

2024-01-22T16:39:40+00:00

The symbol's prompt should be a one-line description, instead of just duplicating the symbol name. Signed-off-by: Geert Uytterhoeven Signed-off-by: Conor Dooley

soc: microchip: mpfs: add auto-update subdev to system controller

2023-12-06T12:06:18+00:00

The PolarFire SoC's system controller offers the ability to re-program the FPGA from a user application via two, related, mechanisms. In-Application Programming (IAP) is not ideal for use in Linux, as it will immediately take down the system when requested. Auto Update is preferred, as it will only take affect at device power up*, allowing the OS (and potential applications in AMP) to be shut down gracefully. * Auto Update occurs at device initialisation, which can also be triggered by device reset - possible with the v2023.02 version of the Hart Software Services (HSS) and reference design. Signed-off-by: Conor Dooley

soc: microchip: mpfs: print service status in warning message

2023-12-06T12:06:18+00:00

Now that resp_status is set for failed services, print the status in the error path's warning. Signed-off-by: Conor Dooley

soc: microchip: mpfs: enable access to the system controller's flash

2023-12-06T12:06:18+00:00

The system controller has a flash that contains images used to reprogram the FPGA using IAP (In-Application Programming). Introduce a function that allows a driver with a reference to the system controller to get one to a flash device attached to it. Signed-off-by: Conor Dooley

soc/microchip: mpfs-sys-controller: Convert to platform remove callback returning void

2023-09-25T10:17:09+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 Signed-off-by: Conor Dooley