kernel/linux.git/drivers/soc/imx, branch v6.19.11

soc: imx8m: Fix error handling for clk_prepare_enable()

2026-03-04T12:19:47+00:00

[ Upstream commit f6ef3d9ff81240e9bcc030f2da132eb0f8a761d7 ] imx8m_soc_prepare() directly returns the result of clk_prepare_enable(), which skips proper cleanup if the clock enable fails. Check the return value of clk_prepare_enable() and release resources if failure. Reported-by: kernel test robot Reported-by: Dan Carpenter Closes: https://lore.kernel.org/r/202601111406.ZVV3YaiU-lkp@intel.com/ Signed-off-by: Peng Fan Reviewed-by: Marco Felsch Reviewed-by: Daniel Baluta Signed-off-by: Shawn Guo Signed-off-by: Sasha Levin

soc: imx8m: Dump higher 64bits UID

2025-05-09T10:16:28+00:00

i.MX8MP UID is actually 128bits and partitioned into two parts. The 1st 64bits are at 0x410 and 0x420, and 2nd 64bits are at 0xE00 and 0xE10. Dump the whole 128bits for i.MX8MP, by set soc_uid as an array with two u64. Signed-off-by: Peng Fan Reviewed-by: Marco Felsch Signed-off-by: Shawn Guo

soc: imx8m: Introduce soc_uid hook

2025-05-09T10:16:28+00:00

Cleanup code by introducing soc_uid hook, i.MX8MQ/M/N could reuse one function imx8m_soc_uid, i.MX8MP could have its own one. With this patch, it will easy to add 128bits UID support for i.MX8MP. Signed-off-by: Peng Fan Reviewed-by: Marco Felsch Signed-off-by: Shawn Guo

soc: imx8m: Cleanup with adding imx8m_soc_[un]prepare

2025-05-09T10:16:28+00:00

There is a common flow to i.MX8M family, map OCOTP register base and enable ocotp clk first before read Unique ID from OCOTP. So introduce imx8m_soc_prepare to do ioremap and enable the ocotp clk, and introduce imx8m_soc_unprepare to disable the clk and do iounmap. With this patch, no need to spread the ioremap and clk handling in each soc_revision hook. Signed-off-by: Peng Fan Reviewed-by: Marco Felsch Signed-off-by: Shawn Guo

soc: imx8m: Unregister cpufreq and soc dev in cleanup path

2025-02-23T07:56:10+00:00

Unregister the cpufreq device and soc device when resource unwinding, otherwise there will be warning when do removing test: sysfs: cannot create duplicate filename '/devices/platform/imx-cpufreq-dt' CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.13.0-rc1-next-20241204 Hardware name: NXP i.MX8MPlus EVK board (DT) Fixes: 9cc832d37799 ("soc: imx8m: Probe the SoC driver as platform driver") Cc: Marco Felsch Signed-off-by: Peng Fan Reviewed-by: Marco Felsch Signed-off-by: Shawn Guo

soc: imx: Add SoC device register for i.MX9

2024-12-09T12:31:39+00:00

i.MX9 SoCs have SoC ID, SoC revision number and chip unique identifier which are provided by the corresponding ARM trusted firmware API. This patch intends to use SMC call to obtain these information and then register i.MX9 SoC as a device. Signed-off-by: Alice Guo Tested-by: Alexander Stein Reviewed-by: Stefan Wahren Signed-off-by: Shawn Guo

soc: imx8m: Use devm_* to simplify probe failure handling

2024-10-18T03:13:53+00:00

Use device managed functions to simplify handling of failures during probe. Remove fail paths which are no longer necessary. Signed-off-by: Marek Vasut Signed-off-by: Shawn Guo

soc: imx8m: Remove global soc_uid

2024-10-18T03:13:53+00:00

The static global soc_uid is only ever used as kasprintf() parameter in imx8m_soc_probe(). Pass pointer to local u64 variable to .soc_revision() callback instead and let the .soc_revision() callback fill in the content. Remove the unnecessary static global variable. Signed-off-by: Marek Vasut Signed-off-by: Shawn Guo

soc: imx8m: Probe the SoC driver as platform driver

2024-10-18T03:13:53+00:00

With driver_async_probe=* on kernel command line, the following trace is produced because on i.MX8M Plus hardware because the soc-imx8m.c driver calls of_clk_get_by_name() which returns -EPROBE_DEFER because the clock driver is not yet probed. This was not detected during regular testing without driver_async_probe. Convert the SoC code to platform driver and instantiate a platform device in its current device_initcall() to probe the platform driver. Rework .soc_revision callback to always return valid error code and return SoC revision via parameter. This way, if anything in the .soc_revision callback return -EPROBE_DEFER, it gets propagated to .probe and the .probe will get retried later. " ------------[ cut here ]------------ WARNING: CPU: 1 PID: 1 at drivers/soc/imx/soc-imx8m.c:115 imx8mm_soc_revision+0xdc/0x180 CPU: 1 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.11.0-next-20240924-00002-g2062bb554dea #603 Hardware name: DH electronics i.MX8M Plus DHCOM Premium Developer Kit (3) (DT) pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : imx8mm_soc_revision+0xdc/0x180 lr : imx8mm_soc_revision+0xd0/0x180 sp : ffff8000821fbcc0 x29: ffff8000821fbce0 x28: 0000000000000000 x27: ffff800081810120 x26: ffff8000818a9970 x25: 0000000000000006 x24: 0000000000824311 x23: ffff8000817f42c8 x22: ffff0000df8be210 x21: fffffffffffffdfb x20: ffff800082780000 x19: 0000000000000001 x18: ffffffffffffffff x17: ffff800081fff418 x16: ffff8000823e1000 x15: ffff0000c03b65e8 x14: ffff0000c00051b0 x13: ffff800082790000 x12: 0000000000000801 x11: ffff80008278ffff x10: ffff80008209d3a6 x9 : ffff80008062e95c x8 : ffff8000821fb9a0 x7 : 0000000000000000 x6 : 00000000000080e3 x5 : ffff0000df8c03d8 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : fffffffffffffdfb x0 : fffffffffffffdfb Call trace: imx8mm_soc_revision+0xdc/0x180 imx8_soc_init+0xb0/0x1e0 do_one_initcall+0x94/0x1a8 kernel_init_freeable+0x240/0x2a8 kernel_init+0x28/0x140 ret_from_fork+0x10/0x20 ---[ end trace 0000000000000000 ]--- SoC: i.MX8MP revision 1.1 " Signed-off-by: Marek Vasut Signed-off-by: Shawn Guo

soc: add missing MODULE_DESCRIPTION() macros

2024-06-27T14:42:50+00:00

With ARCH=x86, make allmodconfig && make W=1 C=1 reports: WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/soc/imx/soc-imx8m.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/soc/ixp4xx/ixp4xx-qmgr.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/soc/ixp4xx/ixp4xx-npe.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/soc/mediatek/mtk-cmdq-helper.o WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/soc/amlogic/meson-clk-measure.o Add the missing invocations of the MODULE_DESCRIPTION() macro. Reviewed-by: Linus Walleij Acked-by: Shawn Guo Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: Neil Armstrong # for amlogic/meson-clk-measure.c Signed-off-by: Jeff Johnson Link: https://lore.kernel.org/r/20240625-md-drivers-soc-v2-1-8bc7c03e3e69@quicinc.com Signed-off-by: Arnd Bergmann