linux-toradex.git/drivers/nvmem, branch v5.11-rc6

nvmem: imx-ocotp: add support for the unaliged word count

2020-11-27T15:10:07+00:00

When offset is not 4 bytes aligned, directly shift righty by 2 bits
will cause reading out wrong data. Since imx ocotp only supports
4 bytes reading once, we need handle offset is not 4 bytes aligned
and enlarge the bytes to 4 bytes aligned. After reading finished,
copy the needed data from buffer to caller and free buffer.

Signed-off-by: Peng Fan 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20201127102837.19366-6-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: qfprom: Don't touch certain fuses

2020-11-27T15:10:06+00:00

Some fuse ranges are protected by the XPU such that the AP cannot
access them. Attempting to do so causes an SError. Use the newly
introduced per-soc compatible string, and the newly introduced
nvmem keepout support to attach the set of regions
we should not access.

Reviewed-by: Douglas Anderson 
Signed-off-by: Evan Green 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20201127102837.19366-5-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: core: Add support for keepout regions

2020-11-27T15:10:06+00:00

Introduce support into the nvmem core for arrays of register ranges
that should not result in actual device access. For these regions a
constant byte (repeated) is returned instead on read, and writes are
quietly ignored and returned as successful.

This is useful for instance if certain efuse regions are protected
from access by Linux because they contain secret info to another part
of the system (like an integrated modem).

Signed-off-by: Evan Green 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20201127102837.19366-3-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: core: fix possibly memleak when use nvmem_cell_info_to_nvmem_cell()

2020-09-27T12:25:48+00:00

Fix missing 'kfree_const(cell->name)' when call to
nvmem_cell_info_to_nvmem_cell() in several places:

     * after nvmem_cell_info_to_nvmem_cell() failed during
       nvmem_add_cells()

     * during nvmem_device_cell_{read,write} when cell->name is
       kstrdup'ed() without calling kfree_const() at the end, but
       really there is no reason to do that 'dup, because the cell
       instance is allocated on the stack for some short period to be
       read/write without exposing it to the caller.

So the new nvmem_cell_info_to_nvmem_cell_nodup() helper is introduced
which is used to convert cell_info -> cell without name duplication as
a lighweight version of nvmem_cell_info_to_nvmem_cell().

Fixes: e2a5402ec7c6 ("nvmem: Add nvmem_device based consumer apis.")
Reviewed-by: Srinivas Kandagatla 
Acked-by: Srinivas Kandagatla 
Signed-off-by: Vadym Kochan 
Link: https://lore.kernel.org/r/20200923204456.14032-1-vadym.kochan@plvision.eu
Signed-off-by: Greg Kroah-Hartman

nvmem: core: fix missing of_node_put() in of_nvmem_device_get()

2020-09-17T16:48:23+00:00

of_parse_phandle() returns device_node with incremented ref count
which needs to be decremented by of_node_put() when device_node
is not used.

Fixes: e2a5402ec7c6 ("nvmem: Add nvmem_device based consumer apis.")
Signed-off-by: Vadym Kochan 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20200917134437.16637-5-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: switch to simpler IDA interface

2020-09-17T16:48:23+00:00

We don't need to specify any ranges when allocating IDs so we can switch
to ida_alloc() and ida_free() instead of the ida_simple_ counterparts.

ida_simple_get(ida, 0, 0, gfp) is equivalent to
ida_alloc_range(ida, 0, UINT_MAX, gfp) which is equivalent to
ida_alloc(ida, gfp). Note: IDR will never actually allocate an ID
larger than INT_MAX.

Signed-off-by: Bartosz Golaszewski 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20200917134437.16637-4-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: core: Use kobj_to_dev() instead of container_of()

2020-09-17T16:48:23+00:00

Use kobj_to_dev() instead of container_of()

Signed-off-by: Tian Tao 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20200917134437.16637-3-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: mtk-efuse: Remove EFUSE register write support

2020-09-17T16:48:23+00:00

This patch is to remove function "mtk_reg_write" since
Mediatek EFUSE hardware only supports read functionality
for NVMEM consumers.

Fixes: ba360fd040e3 ("nvmem: mtk-efuse: remove nvmem regmap dependency")
Acked-by: Andrew-CT Chen 
Signed-off-by: Chih-En Hsu 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20200917134437.16637-2-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: qcom-spmi-sdam: Enable multiple devices

2020-07-29T15:12:09+00:00

Using pdev->id as the nvmem's config ID (which, by default, is
NVMEM_DEVID_NONE) prevents multiple instances of this driver from
probing because of the following error:

  sysfs: cannot create duplicate filename '/bus/nvmem/devices/spmi_sdam'

Use NVMEM_DEVID_AUTO as the NVMEM config ID to fix the issue.

Signed-off-by: Guru Das Srinagesh 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20200722100705.7772-15-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman

nvmem: update Kconfig description

2020-07-29T15:12:09+00:00

nvmem can't be built as module anymore, update its Kconfig description.

Fixes: 2a37ce25d9f2 ("nvmem: disallow modular CONFIG_NVMEM")
Signed-off-by: Matteo Croce 
Signed-off-by: Srinivas Kandagatla 
Link: https://lore.kernel.org/r/20200722100705.7772-13-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman