linux-stable.git/include/linux/nvmem-provider.h, branch v4.20.7

nvmem: use EOPNOTSUPP instead of ENOSYS

2018-09-28T13:14:55+00:00

Checkpatch emits warnings when using ENOSYS. Some of the frameworks
started using EOPNOTSUPP as return values for API functions when given
subsystem is disabled in Kconfig.

Signed-off-by: Bartosz Golaszewski 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: use SPDX license identifiers

2018-09-28T13:14:54+00:00

Use SPDX license identiefiers to core nvmem files and remove GPL 2.0
license boilerplate.

Signed-off-by: Bartosz Golaszewski 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: add support for cell info

2018-09-28T13:14:54+00:00

Add new structs and routines allowing users to define nvmem cells from
machine code. This global list of entries is parsed when a provider
is registered and cells are associated with the relevant nvmem_device
struct.

A possible improvement for the future is to allow users to register
cell tables after the nvmem provider has been registered by updating
the cell list at each call to nvmem_(add|del)_cell_table().

Signed-off-by: Bartosz Golaszewski 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: change the signature of nvmem_unregister()

2018-09-28T13:14:54+00:00

We switched the nvmem framework to using kref instead of manually
checking the current number of users in nvmem_unregister() so this
function can no longer fail. We also converted all remaining users
that still checked the return value of nvmem_unregister() to using
devm_nvmem_register(). Make the routine return void.

Signed-off-by: Bartosz Golaszewski 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

drivers: nvmem: Export nvmem_add_cells()

2018-05-14T14:20:48+00:00

Not all platforms use device tree. It is useful to be able to add
cells to a NVMEM device from code. Export nvmem_add_cells() so making
this possible.

This required changing the parameters a bit, so that just the cells
and the number of cells are passed, not the whole nvmem config
structure.

Signed-off-by: Andrew Lunn 
Reviewed-by: Andrey Smirnov 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: Introduce devm_nvmem_(un)register()

2018-03-14T18:28:13+00:00

Introduce devm_nvmem_register()/devm_nvmem_unregister() to make
.remove() unnecessary in trivial drivers.

Cc: Srinivas Kandagatla 
Cc: Heiko Stuebner 
Cc: Masahiro Yamada 
Cc: Carlo Caione 
Cc: Kevin Hilman 
Cc: Matthias Brugger 
Cc: cphealy@gmail.com
Cc: linux-kernel@vger.kernel.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-rockchip@lists.infradead.org
Cc: linux-amlogic@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Andrey Smirnov 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: core: Allow specifying device name verbatim

2018-03-14T18:28:13+00:00

Add code to allow avoid having nvmem core append a numeric suffix to
the end of the name by passing config->id of -1.

Cc: Srinivas Kandagatla 
Cc: Heiko Stuebner 
Cc: Masahiro Yamada 
Cc: Carlo Caione 
Cc: Kevin Hilman 
Cc: Matthias Brugger 
Cc: cphealy@gmail.com
Cc: linux-kernel@vger.kernel.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-rockchip@lists.infradead.org
Cc: linux-amlogic@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Andrey Smirnov 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: Document struct nvmem_config

2018-03-14T18:28:13+00:00

Add a simple description of struct nvmem_config and its fields.

Cc: Srinivas Kandagatla 
Cc: Heiko Stuebner 
Cc: Masahiro Yamada 
Cc: Carlo Caione 
Cc: Kevin Hilman 
Cc: Matthias Brugger 
Cc: cphealy@gmail.com
Cc: linux-kernel@vger.kernel.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-rockchip@lists.infradead.org
Cc: linux-amlogic@lists.infradead.org
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Andrey Smirnov 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman

nvmem: include linux/err.h from header

2017-07-10T12:27:39+00:00

The new support for nvmem devices from the rtc layer caused a build
error in some configurations:

include/linux/nvmem-provider.h: In function 'nvmem_register':
include/linux/nvmem-provider.h:51:9: error: implicit declaration of function 'ERR_PTR' [-Werror=implicit-function-declaration]

This adds the missing include to ensure we can always include
the header.

Fixes: 697e5a47aa12 ("rtc: add generic nvmem support")
Signed-off-by: Arnd Bergmann 
Acked-by: Srinivas Kandagatla 
Signed-off-by: Alexandre Belloni

nvmem: core: remove regmap dependency

2016-05-01T21:01:00+00:00

nvmem uses regmap_raw_read/write apis to read/write data from providers,
regmap raw apis stopped working with recent kernels which removed raw
accessors on mmio bus. This resulted in broken nvmem for providers
which are based on regmap mmio bus. This issue can be fixed temporarly
by moving to other regmap apis, but we might hit same issue in future.
Moving to interfaces based on read/write callbacks from providers would
be more robust.

This patch removes regmap dependency from nvmem and introduces
read/write callbacks from the providers.

Without this patch nvmem providers like qfprom based on regmap mmio
bus would not work.

Reported-by: Rajendra Nayak 
Signed-off-by: Srinivas Kandagatla 
Signed-off-by: Greg Kroah-Hartman