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path: root/drivers/soc/imx/soc-imx8.c
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2019-11-04soc: imx8mq: Read SOC revision from TF-ALeonard Crestez
SOC revision on older imx8mq is not available in fuses so on anything other than B1 current code just reports "unknown". TF-A already handles this by parsing the ROM and exposes the value through a SMC call. Call this instead of reimplementing the workaround in the kernel itself. Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Reviewed-by: Abel Vesa <abel.vesa@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2019-10-28soc: imx8: Using existing serial_number instead of UIDAnson Huang
The soc_device_attribute structure already contains a serial_number attribute to show SoC's unique ID, just use it to show SoC's unique ID instead of creating a new file called soc_uid. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2019-07-22soc: imx8: Add i.MX8MM UID(unique identifier) supportAnson Huang
Add i.MX8MM SoC UID(unique identifier) support, user can read it from sysfs: root@imx8mmevk:~# cat /sys/devices/soc0/soc_uid B365FA0A5C85D6EE Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2019-07-22soc: imx8: Add i.MX8MQ UID(unique identifier) supportAnson Huang
Add i.MX8MQ SoC UID(unique identifier) support, user can read it from sysfs: root@imx8mqevk:~# cat /sys/devices/soc0/soc_uid D56911D6F060954B Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2019-07-19Merge tag 'armsoc-drivers' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc Pull ARM SoC-related driver updates from Olof Johansson: "Various driver updates for platforms and a couple of the small driver subsystems we merge through our tree: - A driver for SCU (system control) on NXP i.MX8QXP - Qualcomm Always-on Subsystem messaging driver (AOSS QMP) - Qualcomm PM support for MSM8998 - Support for a newer version of DRAM PHY driver for Broadcom (DPFE) - Reset controller support for Bitmain BM1880 - TI SCI (System Control Interface) support for CPU control on AM654 processors - More TI sysc refactoring and rework" * tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (84 commits) reset: remove redundant null check on pointer dev soc: rockchip: work around clang warning dt-bindings: reset: imx7: Fix the spelling of 'indices' soc: imx: Add i.MX8MN SoC driver support soc: aspeed: lpc-ctrl: Fix probe error handling soc: qcom: geni: Add support for ACPI firmware: ti_sci: Fix gcc unused-but-set-variable warning firmware: ti_sci: Use the correct style for SPDX License Identifier soc: imx8: Use existing of_root directly soc: imx8: Fix potential kernel dump in error path firmware/psci: psci_checker: Park kthreads before stopping them memory: move jedec_ddr.h from include/memory to drivers/memory/ memory: move jedec_ddr_data.c from lib/ to drivers/memory/ MAINTAINERS: Remove myself as qcom maintainer soc: aspeed: lpc-ctrl: make parameter optional soc: qcom: apr: Don't use reg for domain id soc: qcom: fix QCOM_AOSS_QMP dependency and build errors memory: tegra: Fix -Wunused-const-variable firmware: tegra: Early resume BPMP soc/tegra: Select pinctrl for Tegra194 ...
2019-06-24soc: imx: Add i.MX8MN SoC driver supportAnson Huang
This patch adds i.MX8MN SoC driver support: root@imx8mnevk:~# cat /sys/devices/soc0/family Freescale i.MX root@imx8mnevk:~# cat /sys/devices/soc0/machine NXP i.MX8MNano DDR4 EVK board root@imx8mnevk:~# cat /sys/devices/soc0/soc_id i.MX8MN root@imx8mnevk:~# cat /sys/devices/soc0/revision 1.0 Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2019-06-18soc: imx8: Use existing of_root directlyAnson Huang
There is common of_root for reference, no need to find it from DT again, use of_root directly to make driver simple. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2019-06-18soc: imx8: Fix potential kernel dump in error pathAnson Huang
When SoC's revision value is 0, SoC driver will print out "unknown" in sysfs's revision node, this "unknown" is a static string which can NOT be freed, this will caused below kernel dump in later error path which calls kfree: kernel BUG at mm/slub.c:3942! Internal error: Oops - BUG: 0 [#1] PREEMPT SMP Modules linked in: CPU: 2 PID: 1 Comm: swapper/0 Not tainted 5.2.0-rc4-next-20190611-00023-g705146c-dirty #2197 Hardware name: NXP i.MX8MQ EVK (DT) pstate: 60000005 (nZCv daif -PAN -UAO) pc : kfree+0x170/0x1b0 lr : imx8_soc_init+0xc0/0xe4 sp : ffff00001003bd10 x29: ffff00001003bd10 x28: ffff00001121e0a0 x27: ffff000011482000 x26: ffff00001117068c x25: ffff00001121e100 x24: ffff000011482000 x23: ffff000010fe2b58 x22: ffff0000111b9ab0 x21: ffff8000bd9dfba0 x20: ffff0000111b9b70 x19: ffff7e000043f880 x18: 0000000000001000 x17: ffff000010d05fa0 x16: ffff0000122e0000 x15: 0140000000000000 x14: 0000000030360000 x13: ffff8000b94b5bb0 x12: 0000000000000038 x11: ffffffffffffffff x10: ffffffffffffffff x9 : 0000000000000003 x8 : ffff8000b9488147 x7 : ffff00001003bc00 x6 : 0000000000000000 x5 : 0000000000000003 x4 : 0000000000000003 x3 : 0000000000000003 x2 : b8793acd604edf00 x1 : ffff7e000043f880 x0 : ffff7e000043f888 Call trace: kfree+0x170/0x1b0 imx8_soc_init+0xc0/0xe4 do_one_initcall+0x58/0x1b8 kernel_init_freeable+0x1cc/0x288 kernel_init+0x10/0x100 ret_from_fork+0x10/0x18 This patch fixes this potential kernel dump when a chip's revision is "unknown", it is done by checking whether the revision space can be freed. Fixes: a7e26f356ca1 ("soc: imx: Add generic i.MX8 SoC driver") Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2019-06-05soc: imx: soc-imx8: Correct return value of error handleAnson Huang
Current implementation of i.MX8 SoC driver returns -ENODEV for all cases of error during initialization, this is incorrect. This patch fixes them using correct return value according to different errors. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2019-06-05soc: imx: soc-imx8: Avoid unnecessary of_node_put() in error handlingAnson Huang
of_node_put() is called after of_match_node() successfully called, then in the following error handling, of_node_put() is called again which is unnecessary, this patch adjusts the location of of_node_put() to avoid such scenario. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2019-05-20soc: imx: Read imx8mm soc revision from anatopLeonard Crestez
Like on imx6/7 we can read version information from a register in anatop, and in the same format. Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Reviewed-by: Fabio Estevam <festevam@gmail.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2019-05-20cpufreq: Add imx-cpufreq-dt driverLeonard Crestez
Right now in upstream imx8m cpufreq support just lists a common subset of OPPs because the higher ones should only be attempted after checking speed grading in fuses. Add a small driver which checks speed grading from nvmem cells before registering cpufreq-dt. This driver allows unlocking all frequencies for imx8mm and imx8mq and could be applied to other chips like imx7d Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2019-04-20soc: imx: Add generic i.MX8 SoC driverAbel Vesa
Add generic i.MX8 SoC driver along with the i.MX8MQ SoC specific code. For now, only i.MX8MQ revision B1 is supported. For any other, i.MX8MQ revision it will print 'unknown'. Signed-off-by: Abel Vesa <abel.vesa@nxp.com> Reviewed-by: Leonard Crestez <leonard.crestez@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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