kernel/linux.git/drivers/soc/samsung, branch v6.18.22

soc: samsung: exynos-pmu: fix device leak on regmap lookup

2026-01-02T11:57:28+00:00

commit 990eb9a8eb4540ab90c7b34bb07b87ff13881cad upstream. Make sure to drop the reference taken when looking up the PMU device and its regmap. Note that holding a reference to a device does not prevent its regmap from going away so there is no point in keeping the reference. Fixes: 0b7c6075022c ("soc: samsung: exynos-pmu: Add regmap support for SoCs that protect PMU regs") Cc: stable@vger.kernel.org # 6.9 Cc: Peter Griffin Signed-off-by: Johan Hovold Link: https://patch.msgid.link/20251121121852.16825-1-johan@kernel.org Signed-off-by: Krzysztof Kozlowski Signed-off-by: Greg Kroah-Hartman

soc: samsung: exynos-pmu: Fix structure initialization

2025-12-18T13:03:25+00:00

[ Upstream commit 2224ea67c75d0a0b9eaf803d0dfdab8d0c601c35 ] Commit 78b72897a5c8 ("soc: samsung: exynos-pmu: Enable CPU Idle for gs101") added system wide suspend/resume callbacks to Exynos PMU driver, but some items used by these callbacks are initialized only on GS101-compatible boards. Move that initialization to exynos_pmu_probe() to avoid potential lockdep warnings like below observed during system suspend/resume cycle: INFO: trying to register non-static key. The code is fine but needs lockdep annotation, or maybe you didn't initialize this object before use? turning off the locking correctness validator. CPU: 0 UID: 0 PID: 2134 Comm: rtcwake Not tainted 6.18.0-rc7-next-20251126-00039-g1d656a1af243 #11794 PREEMPT Hardware name: Samsung Exynos (Flattened Device Tree) Call trace: unwind_backtrace from show_stack+0x10/0x14 show_stack from dump_stack_lvl+0x68/0x88 dump_stack_lvl from register_lock_class+0x970/0x988 register_lock_class from __lock_acquire+0xc8/0x29ec __lock_acquire from lock_acquire+0x134/0x39c lock_acquire from _raw_spin_lock+0x38/0x48 _raw_spin_lock from exynos_cpupm_suspend_noirq+0x18/0x34 exynos_cpupm_suspend_noirq from dpm_run_callback+0x98/0x2b8 dpm_run_callback from device_suspend_noirq+0x8c/0x310 Fixes: 78b72897a5c8 ("soc: samsung: exynos-pmu: Enable CPU Idle for gs101") Signed-off-by: Marek Szyprowski Link: https://patch.msgid.link/20251126110038.3326768-1-m.szyprowski@samsung.com [krzk: include calltrace into commit msg] Signed-off-by: Krzysztof Kozlowski Signed-off-by: Sasha Levin

soc: samsung: exynos-pmu: Enable CPU Idle for gs101

2025-08-11T07:04:54+00:00

Register cpu pm notifiers for gs101 which call the gs101_cpu_pmu_online/offline callbacks which in turn program the ACPM C2 hint. This hint is required to actually enter the C2 idle state in addition to the PSCI calls due to limitations in the el3mon/ACPM firmware. A couple of corner cases are handled, namely when the system is rebooting or suspending we ignore the request. Additionally the request is ignored if the CPU is in CPU hot plug. Some common code is refactored so that it can be called from both the CPU hot plug callbacks and CPU PM notifier taking into account that CPU PM notifiers are called with IRQs disabled whereas CPU hotplug callbacks are not. Additionally due to CPU PM notifiers using raw_spinlock the locking is updated to use raw_spinlock variants, this includes updating the pmu_regs regmap to use .use_raw_spinlock = true and additionally creating and registering a custom pmu-intr-gen regmap instead of using the regmap provided by syscon. Note: this patch has a runtime dependency on adding 'local-timer-stop' dt property to the CPU nodes. This informs the time framework to switch to a broadcast timer as the local timer will be shutdown. Without that DT property specified the system hangs in early boot with this patch applied. Signed-off-by: Peter Griffin Link: https://lore.kernel.org/r/20250717-gs101-cpuidle-v7-1-33d51770114b@linaro.org Signed-off-by: Krzysztof Kozlowski

Merge tag 'soc-drivers-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

2025-05-31T14:53:30+00:00

Pull SoC driver updates from Arnd Bergmann: "Updates are across the usual driver subsystems with SoC specific drivers: - added soc specicific drivers for sophgo cv1800 and sg2044, qualcomm sm8750, and amlogic c3 and s4 chips. - cache controller updates for sifive chips, plus binding changes for other cache descriptions. - memory controller drivers for mediatek mt6893, stm32 and cleanups for a few more drivers - reset controller drivers for T-Head TH1502, Sophgo sg2044 and Renesas RZ/V2H(P) - SCMI firmware updates to better deal with buggy firmware, plus better support for Qualcomm X1E and NXP i.MX specific interfaces - a new platform driver for the crypto firmware on Cznic Turris Omnia/MOX - cleanups for the TEE firmware subsystem and amdtee driver - minor updates and fixes for freescale/nxp, qualcomm, google, aspeed, wondermedia, ti, nxp, renesas, hisilicon, mediatek, broadcom and samsung SoCs" * tag 'soc-drivers-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (133 commits) soc: aspeed: Add NULL check in aspeed_lpc_enable_snoop() soc: aspeed: lpc: Fix impossible judgment condition ARM: aspeed: Don't select SRAM docs: firmware: qcom_scm: Fix kernel-doc warning soc: fsl: qe: Consolidate chained IRQ handler install/remove firmware: qcom: scm: Allow QSEECOM for HP EliteBook Ultra G1q dt-bindings: mfd: qcom,tcsr: Add compatible for ipq5018 dt-bindings: cache: add QiLai compatible to ax45mp memory: stm32_omm: Fix error handling in stm32_omm_disable_child() dt-bindings: cache: Convert marvell,tauros2-cache to DT schema dt-bindings: cache: Convert marvell,{feroceon,kirkwood}-cache to DT schema soc: samsung: exynos-pmu: enable CPU hotplug support for gs101 MAINTAINERS: Add google,gs101-pmu-intr-gen.yaml binding file dt-bindings: soc: samsung: exynos-pmu: gs101: add google,pmu-intr-gen phandle dt-bindings: soc: google: Add gs101-pmu-intr-gen binding documentation bus: fsl-mc: Use strscpy() instead of strscpy_pad() soc: fsl: qbman: Remove const from portal->cgrs allocation type bus: fsl_mc: Fix driver_managed_dma check bus: fsl-mc: increase MC_CMD_COMPLETION_TIMEOUT_MS value bus: fsl-mc: drop useless cleanup ...

soc: samsung: exynos-pmu: enable CPU hotplug support for gs101

2025-05-13T08:02:29+00:00

Some additional register writes are required when hotplugging CPUs on gs101, without these the system hangs when hotplugging. Specifically a CPU_INFORM register needs to be programmed with a hint value which is used by the EL3 firmware (el3mon) and the pmu-intr-gen registers need to be programmed. With this patch applied, and corresponding DT update CPU hotplug now works as expected. e.g. echo 0 > /sys/devices/system/cpu/cpu6/online echo 1 > /sys/devices/system/cpu/cpu6/online Note: to maintain compatibility with older DTs that didn't specify pmu-intr-gen phandle only a warning is issued if the syscon can't be obtained. Signed-off-by: Peter Griffin Link: https://lore.kernel.org/r/20250506-contrib-pg-cpu-hotplug-suspend2ram-fixes-v1-v4-5-9f64a2657316@linaro.org [krzk: few blank line and white-space alignment fixes from checkpatch] Signed-off-by: Krzysztof Kozlowski

soc: samsung: usi: prevent wrong bits inversion during unconfiguring

2025-04-14T06:51:18+00:00

Instead of setting bit 1 (USI_OPTION_CLKSTOP_ON) during USI unconfiguring, all the other bits in the USI_OPTION register get inverted, which should not happen as that means the clock will keep getting provided to the USI IP. Remove the unnecessary tilde. Fixes: 11e77776b58a ("soc: samsung: usi: add a routine for unconfiguring the ip") Signed-off-by: Ivaylo Ivanov Link: https://lore.kernel.org/r/20250413163755.788907-1-ivo.ivanov.ivanov1@gmail.com Signed-off-by: Krzysztof Kozlowski

Merge tag 'samsung-soc-6.15' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into soc/drivers

2025-03-19T21:39:12+00:00

Samsung mach/soc changes for v6.15 1. S3C: Drop linux/fb.h header. 2. Exynos ChipID: Check if memory allocation succeeded. * tag 'samsung-soc-6.15' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux: soc: samsung: exynos-chipid: Add NULL pointer check in exynos_chipid_probe() ARM: s3c: Do not include Link: https://lore.kernel.org/r/20250309185601.10616-3-krzysztof.kozlowski@linaro.org Signed-off-by: Arnd Bergmann

soc: samsung: include linux/array_size.h where needed

2025-03-06T18:10:17+00:00

This does not necessarily get included through asm/io.h: drivers/soc/samsung/exynos3250-pmu.c:120:18: error: use of undeclared identifier 'ARRAY_SIZE' 120 | for (i = 0; i < ARRAY_SIZE(exynos3250_list_feed); i++) { | ^ drivers/soc/samsung/exynos5250-pmu.c:162:18: error: use of undeclared identifier 'ARRAY_SIZE' 162 | for (i = 0; i < ARRAY_SIZE(exynos5_list_both_cnt_feed); i++) { | ^ Signed-off-by: Arnd Bergmann Link: https://lore.kernel.org/r/20250305211446.43772-1-arnd@kernel.org Signed-off-by: Krzysztof Kozlowski

soc: samsung: exynos-chipid: add support for exynos7870

2025-03-05T18:24:12+00:00

Add the product ID of Exynos7870 (S5E7870) to the existing list. Signed-off-by: Kaustabh Chakraborty Link: https://lore.kernel.org/r/20250301-exynos7870-v4-3-2925537f9b2a@disroot.org Signed-off-by: Krzysztof Kozlowski

soc: samsung: exynos-chipid: add exynos2200 SoC support

2025-02-19T08:29:08+00:00

Add EXYNOS2200 information to soc_ids tables. This SoC product id is "0xE9925000". Signed-off-by: Ivaylo Ivanov Link: https://lore.kernel.org/r/20250215112716.159110-5-ivo.ivanov.ivanov1@gmail.com Signed-off-by: Krzysztof Kozlowski