kernel/linux.git/drivers/nvmem, branch v5.6.17

nvmem: sprd: Fix the block lock operation

2020-04-08T07:11:07+00:00

commit c66ebde4d988b592e8f0008e04c47cc4950a49d3 upstream. According to the Spreadtrum eFuse specification, we should write 0 to the block to trigger the lock operation. Fixes: 096030e7f449 ("nvmem: sprd: Add Spreadtrum SoCs eFuse support") Cc: stable Signed-off-by: Freeman Liu Signed-off-by: Baolin Wang Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20200323150007.7487-2-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

nvmem: check for NULL reg_read and reg_write before dereferencing

2020-04-08T07:11:07+00:00

commit 3c91ef69a3e94f78546b246225ed573fbf1735b4 upstream. Return -EPERM if reg_read is NULL in bin_attr_nvmem_read() or if reg_write is NULL in bin_attr_nvmem_write(). This prevents NULL dereferences such as the one described in 03cd45d2e219 ("thunderbolt: Prevent crash if non-active NVMem file is read") Signed-off-by: Nicholas Johnson Cc: stable Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20200310132257.23358-10-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

nvmem: release the write-protect pin

2020-04-08T07:11:07+00:00

commit a9c3766cb19cdadf2776aba41b64470002645894 upstream. Put the write-protect GPIO descriptor in nvmem_release() so that it can be automatically released when the associated device's reference count drops to 0. Fixes: 2a127da461a9 ("nvmem: add support for the write-protect pin") Reported-by: Geert Uytterhoeven Signed-off-by: Khouloud Touil Cc: stable [Bartosz: tweak the commit message] Signed-off-by: Bartosz Golaszewski Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20200310132257.23358-8-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

Merge branch 'i2c/for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

2020-02-07T20:54:13+00:00

Pull i2c updates from Wolfram Sang: "i2c core: - huge improvements and refactorizations of the Linux I2C documentation (lots of thanks to Luca for doing it and Jean for the careful review) - subsystem wide API conversion to i2c_new_client_device() - remove obsolete parport-light driver - smaller core updates (removal of 'extern', enabling more compile testing, use more helper macros) - and quite a bunch of driver updates (new IDs, simplifications, better PM, support of atomic transfers and other improvements) i2c-mux: - The main feature is the idle-state rework of the pca954x driver from Biwen Li at24 driver: - minor maintenance: update the license tag, sort headers - move support for the write-protect pin into nvmem core - add a reference to the new wp-gpios property in nvmem to at25 bindings - add support for regulator and pm_runtime control" * 'i2c/for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (91 commits) i2c: cros-ec-tunnel: Fix ACPI identifier i2c: cros-ec-tunnel: Fix slave device enumeration i2c: stm32f7: add PM_SLEEP suspend/resume support i2c: cadence: Fix wording in i2c-cadence driver i2c: cadence: Fix power management order of operations i2c: cadence: Fix error printing in case of defer i2c: cadence: Handle transfer_size rollover i2c: i801: Add support for Intel Comet Lake PCH-V docs: i2c: writing-clients: properly name the stop condition docs: i2c: i2c-protocol: use same wording as smbus-protocol docs: i2c: rename sections so the overall picture is clearer docs: i2c: old-module-parameters: use monospace instead of "" docs: i2c: old-module-parameters: clarify this is for obsolete kernels docs: i2c: old-module-parameters: fix internal hyperlink docs: i2c: instantiating-devices: use monospace for sysfs attributes docs: i2c: instantiating-devices: rearrange static instatiation docs: i2c: instantiating-devices: fix internal hyperlink docs: i2c: smbus-protocol: improve I2C Block transactions description docs: i2c: smbus-protocol: fix punctuation docs: i2c: smbus-protocol: fix typo ...

nvmem: add QTI SDAM driver

2020-01-16T19:56:49+00:00

QTI SDAM driver allows PMIC peripherals to access the shared memory that is available on QTI PMICs. Use subsys_initcall as PMIC SDAM NV memory is accessed by multiple PMIC drivers (charger, fuel gauge) to store/restore data across reboots required during their initialization. Signed-off-by: Anirudh Ghayal Signed-off-by: Shyam Kumar Thella Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20200116161100.30637-4-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

nvmem: core: fix memory abort in cleanup path

2020-01-10T12:52:13+00:00

nvmem_cell_info_to_nvmem_cell implementation has static allocation of name. nvmem_add_cells_from_of() call may return error and kfree name results in memory abort. Use kstrdup_const() and kfree_const calls for name alloc and free. Unable to handle kernel paging request at virtual address ffffffffffe44888 Mem abort info: ESR = 0x96000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 swapper pgtable: 64k pages, 48-bit VAs, pgdp=00000000815d0000 [ffffffffffe44888] pgd=0000000081d30803, pud=0000000081d30803, pmd=0000000000000000 Internal error: Oops: 96000006 [#1] PREEMPT SMP Modules linked in: CPU: 2 PID: 43 Comm: kworker/2:1 Tainted Hardware name: quill (DT) Workqueue: events deferred_probe_work_func pstate: a0000005 (NzCv daif -PAN -UAO) pc : kfree+0x38/0x278 lr : nvmem_cell_drop+0x68/0x80 sp : ffff80001284f9d0 x29: ffff80001284f9d0 x28: ffff0001f677e830 x27: ffff800011b0b000 x26: ffff0001c36e1008 x25: ffff8000112ad000 x24: ffff8000112c9000 x23: ffffffffffffffea x22: ffff800010adc7f0 x21: ffffffffffe44880 x20: ffff800011b0b068 x19: ffff80001122d380 x18: ffffffffffffffff x17: 00000000d5cb4756 x16: 0000000070b193b8 x15: ffff8000119538c8 x14: 0720072007200720 x13: 07200720076e0772 x12: 07750762072d0765 x11: 0773077507660765 x10: 072f073007300730 x9 : 0730073207380733 x8 : 0000000000000151 x7 : 07660765072f0720 x6 : ffff0001c00e0f00 x5 : 0000000000000000 x4 : ffff0001c0b43800 x3 : ffff800011b0b068 x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffffffdfffe00000 Call trace: kfree+0x38/0x278 nvmem_cell_drop+0x68/0x80 nvmem_device_remove_all_cells+0x2c/0x50 nvmem_register.part.9+0x520/0x628 devm_nvmem_register+0x48/0xa0 tegra_fuse_probe+0x140/0x1f0 platform_drv_probe+0x50/0xa0 really_probe+0x108/0x348 driver_probe_device+0x58/0x100 __device_attach_driver+0x90/0xb0 bus_for_each_drv+0x64/0xc8 __device_attach+0xd8/0x138 device_initial_probe+0x10/0x18 bus_probe_device+0x90/0x98 deferred_probe_work_func+0x74/0xb0 process_one_work+0x1e0/0x358 worker_thread+0x208/0x488 kthread+0x118/0x120 ret_from_fork+0x10/0x18 Code: d350feb5 f2dffbe0 aa1e03f6 8b151815 (f94006a0) ---[ end trace 49b1303c6b83198e ]--- Fixes: badcdff107cbf ("nvmem: Convert to using %pOFn instead of device_node.name") Signed-off-by: Bitan Biswas Cc: stable Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20200109104017.6249-5-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

nvmem: imx: ocotp: introduce ocotp_ctrl_reg

2020-01-10T12:52:12+00:00

Introduce ocotp_ctrl_reg to include the low 16bits mask of CTRL register. i.MX chips will have different layout of the low 16bits of CTRL register, so use ocotp_ctrl_reg will make it clean to add new chip support. Signed-off-by: Peng Fan Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20200109104017.6249-4-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

nvmem: imx: scu: correct the fuse word index

2020-01-10T12:52:12+00:00

i.MX8 fuse word row index represented as one 4-bytes word. Exp: - MAC0 address layout in fuse: offset 708: MAC[3] MAC[2] MAC[1] MAC[0] offset 709: XX xx MAC[5] MAC[4] The original code takes row index * 4 as the offset, this not exactly match i.MX8 fuse map documentation. So update code the reflect the truth. Signed-off-by: Peng Fan Reviewed-by: Fugang Duan Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20200109104017.6249-3-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

nvmem: imx: scu: fix write SIP

2020-01-10T12:52:12+00:00

SIP number 0xC200000A is for reading, 0xC200000B is for writing. And the following two args for write are word index, data to write. Fixes: 885ce72a09d0 ("nvmem: imx: scu: support write") Signed-off-by: Peng Fan Signed-off-by: Srinivas Kandagatla Cc: stable Link: https://lore.kernel.org/r/20200109104017.6249-2-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman

nvmem: fix a 'makes pointer from integer without a cast' build warning

2020-01-10T11:11:30+00:00

nvmem_register() returns a pointer, not a long int. Use ERR_CAST() to cast the struct gpio_desc pointer to struct nvmem_device. Reported-by: kbuild test robot Fixes: 2a127da461a9 ("nvmem: add support for the write-protect pin") Signed-off-by: Bartosz Golaszewski Acked-by: Srinivas Kandagatla