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| author | Srinivas Kandagatla <srinivas.kandagatla@linaro.org> | 2020-07-22 12:06:59 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-07-29 17:12:08 +0200 |
| commit | 3f07c658330f2bc00a5e86ac2c8ec2c659d73760 (patch) | |
| tree | ec25a0efb1a35ddb435e82d3f715cd75c6f409d6 /drivers/nvmem | |
| parent | nvmem: core: add support to auto devid (diff) | |
| download | linux-3f07c658330f2bc00a5e86ac2c8ec2c659d73760.tar.xz linux-3f07c658330f2bc00a5e86ac2c8ec2c659d73760.zip | |
nvmem: qfprom: use NVMEM_DEVID_AUTO for multiple instances
There could be multiple qfprom devices on some SoCs. For example, on
MSM8939, qfprom@58000 holds efuse bits for Core Power Reduction (CPR),
and qfprom@5c000 holds bits for TSENS. Registering multiple nvmem
devices with the same id results in the following failure on the second
device.
[ 1.682731] sysfs: cannot create duplicate filename /bus/nvmem/devices/qfprom0
[ 1.685889] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.19.107-00567-g11c887ce2838-dirty #334
[ 1.693191] Hardware name: Square, Inc. T2 Devkit (DT)
[ 1.701610] Call trace:
[ 1.706673] dump_backtrace+0x0/0x158
[ 1.708987] show_stack+0x14/0x20
[ 1.712810] dump_stack+0x98/0xbc
[ 1.716114] sysfs_warn_dup+0x60/0x78
[ 1.719401] sysfs_do_create_link_sd.isra.0+0xdc/0xe8
[ 1.723047] sysfs_create_link+0x20/0x40
[ 1.728088] bus_add_device+0x68/0x130
[ 1.732083] device_add+0x3f8/0x628
[ 1.735639] nvmem_register.part.4+0x150/0x348
[ 1.739018] devm_nvmem_register+0x4c/0xa8
[ 1.743532] qfprom_probe+0x94/0xb8
[ 1.747615] platform_drv_probe+0x50/0xa0
[ 1.750998] really_probe+0x1b8/0x298
[ 1.755164] driver_probe_device+0x58/0x100
[ 1.758810] __driver_attach+0xe0/0xe8
[ 1.762802] bus_for_each_dev+0x74/0xc8
[ 1.766622] driver_attach+0x20/0x28
[ 1.770354] bus_add_driver+0x1ac/0x218
[ 1.774175] driver_register+0x60/0x110
[ 1.777734] __platform_driver_register+0x40/0x48
[ 1.781570] qfprom_driver_init+0x18/0x20
[ 1.786416] do_one_initcall+0x5c/0x178
[ 1.790418] kernel_init_freeable+0x198/0x244
[ 1.794062] kernel_init+0x10/0x108
[ 1.798567] ret_from_fork+0x10/0x18
[ 1.802084] qcom,qfprom: probe of 5c000.qfprom failed with error -17
Fix this issue by using NVMEM_DEVID_AUTO.
Reported-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
Link: https://lore.kernel.org/r/20200722100705.7772-9-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvmem')
| -rw-r--r-- | drivers/nvmem/qfprom.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/nvmem/qfprom.c b/drivers/nvmem/qfprom.c index 8a91717600be..8b425f8d847d 100644 --- a/drivers/nvmem/qfprom.c +++ b/drivers/nvmem/qfprom.c @@ -31,6 +31,7 @@ static struct nvmem_config econfig = { .name = "qfprom", .stride = 1, .word_size = 1, + .id = NVMEM_DEVID_AUTO, .reg_read = qfprom_reg_read, }; |