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path: root/drivers/nvmem/meson-mx-efuse.c
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2018-03-14nvmem: meson-mx-efuse: Convert to use devm_nvmem_register()Andrey Smirnov
Drop all of the code related to .remove hook and make use of devm_nvmem_register() instead. Cc: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Cc: Heiko Stuebner <heiko@sntech.de> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Carlo Caione <carlo@caione.org> Cc: Kevin Hilman <khilman@baylibre.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> 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 <andrew.smirnov@gmail.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-12-23nvmem: meson-mx-efuse: fix reading from an offset other than 0Martin Blumenstingl
meson_mx_efuse_read calculates the address internal to the eFuse based on the offset and the word size. This works fine with any given offset. However, the offset is also included when writing to the output buffer. This means that reading 4 bytes at offset 500 tries to write beyond the array allocated by the nvmem core as it wants to write the 4 bytes to "buffer address + offset (500)". This issue did not show up in the previous tests since no driver uses any value from the eFuse yet and reading the eFuse via sysfs simply reads the whole eFuse, starting at offset 0. Fix this by only including the offset in the internal address calculation. Fixes: 8caef1fa9176 ("nvmem: add a driver for the Amlogic Meson6/Meson8/Meson8b SoCs") Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-10-20nvmem: add a driver for the Amlogic Meson6/Meson8/Meson8b SoCsMartin Blumenstingl
This adds a driver to access the efuse on Amlogic Meson6, Meson8 and Meson8b SoCs. These SoCs are accessing the efuse IP block directly through the registers in the "secbus" region. This makes it different from the Meson GX efuse driver which uses the "secure monitor" firmware to access the efuse. The efuse on Meson6 can only read one byte at a time, while the efuse on Meson8 and Meson8b always reads 4 bytes at a time. The new driver supports both, but due to lack of hardware Meson6 support was not tested. The hardware also supports writing. However, this is currently not supported by the driver. Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>