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2018-08-03spi: spi-mem: Constify spi_mem->nameBoris Brezillon1-1/+1
There is no reason to make spi_mem->name modifiable. Moreover, spi_mem_ops->get_name() returns a const char *, which generates a gcc warning when assigning the value returned by spi_mem_ops->get_name() to spi_mem->name. Fixes: 5d27a9c8ea9e ("spi: spi-mem: Extend the SPI mem interface to set a custom memory name") Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-08-02mtd: m25p80: Call spi_mem_get_name() to let controller set a custom nameFrieder Schrempf1-0/+3
By calling spi_mem_get_name(), the driver of the (Q)SPI controller can set a custom name for the memory device if necessary. This is useful to keep mtdparts compatible when controller drivers are ported from the MTD to the SPI layer. Suggested-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Frieder Schrempf <frieder.schrempf@exceet.de> Acked-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-08-02spi: spi-mem: Extend the SPI mem interface to set a custom memory nameFrieder Schrempf2-0/+40
When porting (Q)SPI controller drivers from the MTD layer to the SPI layer, the naming scheme for the memory devices changes. To be able to keep compatibility with the old drivers naming scheme, a name field is added to struct spi_mem and a hook is added to let controller drivers set a custom name for the memory device. Example for the FSL QSPI driver: Name with the old driver: 21e0000.qspi, or with multiple devices: 21e0000.qspi-0, 21e0000.qspi-1, ... Name with the new driver without spi_mem_get_name: spi4.0 Suggested-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Frieder Schrempf <frieder.schrempf@exceet.de> Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-08-02spi: spi-mem: Fix a typo in the documentation of struct spi_memFrieder Schrempf1-1/+1
Fix a typo in the @drvpriv description. Signed-off-by: Frieder Schrempf <frieder.schrempf@exceet.de> Acked-by: Boris Brezillon <boris.brezillon@bootlin.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-08-02spi: uniphier: remove unnecessary include headersKeiji Hayashibara1-2/+0
This commit removed include headers of linux/of.h and linux/of_platform.h, because they are not used. Signed-off-by: Keiji Hayashibara <hayashibara.keiji@socionext.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-08-01spi: spi-gpio: add SPI_3WIRE supportLorenzo Bianconi3-1/+33
Add SPI_3WIRE support to spi-gpio controller introducing set_line_direction function pointer in spi_bitbang data structure. Spi-gpio controller has been tested using hts221 temp/rh iio sensor running in 3wire mode and lsm6dsm running in 4wire mode Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-08-01spi: add flags parameter to txrx_word function pointersLorenzo Bianconi8-44/+57
Add the capability to specify the flag parameter used in bitbang_txrx_be_cpha{0,1} through the txrx_word function pointers of spi_bitbang data structure. That feature will be used to add spi-3wire support to the spi-gpio controller Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-08-01spi: add SPI controller driver for UniPhier SoCKeiji Hayashibara3-0/+539
Add SPI controller driver implemented in Socionext UniPhier SoCs. UniPhier SoCs have two types SPI controllers; SCSSI supports a single channel, and MCSSI supports multiple channels. This driver supports SCSSI only. This controller has 32bit TX/RX FIFO with depth of eight entry, and supports the SPI master mode only. This commit is implemented in PIO transfer mode, not DMA transfer. Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Signed-off-by: Keiji Hayashibara <hayashibara.keiji@socionext.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>