kernel/linux.git/drivers/spi, branch v3.18.100

spi: atmel: fixed spin_lock usage inside atmel_spi_remove

2018-03-03T09:17:07+00:00

[ Upstream commit 66e900a3d225575c8b48b59ae1fe74bb6e5a65cc ] The only part of atmel_spi_remove which needs to be atomic is hardware reset. atmel_spi_stop_dma calls dma_terminate_all and this needs interrupts enabled. atmel_spi_release_dma calls dma_release_channel and dma_release_channel locks a mutex inside of spin_lock. So the call of these functions can't be inside a spin_lock. Reported-by: Jia-Ju Bai Signed-off-by: Radu Pirea Signed-off-by: Mark Brown Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

spi: sun4i: disable clocks in the remove function

2018-02-25T10:01:20+00:00

[ Upstream commit c810daba0ab5226084a56893a789af427a801146 ] mclk and hclk need to be disabled. Since pm_runtime_disable does not disable the clocks, use pm_runtime_force_suspend instead. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Takuo Koguchi Acked-by: Maxime Ripard Signed-off-by: Mark Brown Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

spi: imx: do not access registers while clocks disabled

2018-02-07T19:07:57+00:00

commit d593574aff0ab846136190b1729c151c736727ec upstream. Since clocks are disabled except during message transfer clocks are also disabled when spi_imx_remove gets called. Accessing registers leads to a freeeze at least on a i.MX 6ULL. Enable clocks before disabling accessing the MXC_CSPICTRL register. Fixes: 9e556dcc55774 ("spi: spi-imx: only enable the clocks when we start to transfer a message") Signed-off-by: Stefan Agner Signed-off-by: Mark Brown Signed-off-by: Greg Kroah-Hartman

spi: sh-msiof: Fix DMA transfer size check

2017-12-09T17:29:47+00:00

[ Upstream commit 36735783fdb599c94b9c86824583df367c65900b ] DMA supports 32-bit words only, even if BITLEN1 of SITMDR2 register is 16bit. Fixes: b0d0ce8b6b91 ("spi: sh-msiof: Add DMA support") Signed-off-by: Hiromitsu Yamasaki Signed-off-by: Simon Horman Acked-by: Geert Uytterhoeven Acked-by: Dirk Behme Signed-off-by: Mark Brown Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

spi: dw: Make debugfs name unique between instances

2017-08-11T16:30:12+00:00

[ Upstream commit 13288bdf4adbaa6bd1267f10044c1bc25d90ce7f ] Some system have multiple dw devices. Currently the driver uses a fixed name for the debugfs dir. Append dev name to the debugfs dir name to make it unique. Signed-off-by: Phil Reid Signed-off-by: Mark Brown Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

spi: dw-mid: refactor to use helpers

2017-02-08T08:43:05+00:00

commit a5c2db964d3eb26b41bd7abc1b13486f732b3aa2 upstream. This patch splits few helpers, namely dw_spi_dma_prepare_rx(), dw_spi_dma_prepare_tx(), and dw_spi_dma_setup() which will be useful for the consequent improvements. There is no functional change. Signed-off-by: Andy Shevchenko Signed-off-by: Mark Brown [removes a build warning with newer versions of gcc - gregkh] Signed-off-by: Greg Kroah-Hartman

spi/rockchip: Make sure spi clk is on in rockchip_spi_set_cs

2016-07-12T12:47:51+00:00

[ Upstream commit b920cc3191d7612f26f36ee494e05b5ffd9044c0 ] Rockchip_spi_set_cs could be called by spi_setup, but spi_setup may be called by device driver after runtime suspend. Then the spi clock is closed, rockchip_spi_set_cs may access the spi registers, which causes cpu block in some socs. Fixes: 64e36824b32 ("spi/rockchip: add driver for Rockchip RK3xxx") Signed-off-by: Huibin Hong Signed-off-by: Mark Brown Signed-off-by: Sasha Levin

spi: sunxi: fix transfer timeout

2016-07-12T12:46:50+00:00

[ Upstream commit 719bd6542044efd9b338a53dba1bef45f40ca169 ] The trasfer timeout is fixed at 1000 ms. Reading a 4Mbyte flash over 1MHz SPI bus takes way longer than that. Calculate the timeout from the actual time the transfer is supposed to take and multiply by 2 for good measure. Signed-off-by: Michal Suchanek Acked-by: Maxime Ripard Signed-off-by: Mark Brown Cc: stable@vger.kernel.org Signed-off-by: Sasha Levin

spi: sun4i: allow transfers to set transmission speed

2016-07-12T12:46:44+00:00

[ Upstream commit 47284e3e0f3c427c93f8583549b6c938e8a18015 ] Allow transfers to set the transmission speed rather than using the device max_speed_hz value. The SPI core makes sure that the speed_hz value is always set on the transfer. Signed-off-by: Marcus Weseloh Signed-off-by: Mark Brown Signed-off-by: Sasha Levin

spi: sun4i: fix FIFO limit

2016-07-11T15:16:34+00:00

[ Upstream commit 6d9fe44bd73d567d04d3a68a2d2fa521ab9532f2 ] When testing SPI without DMA I noticed that filling the FIFO on the spi controller causes timeout. Always leave room for one byte in the FIFO. Signed-off-by: Michal Suchanek Acked-by: Maxime Ripard Signed-off-by: Mark Brown Cc: stable@vger.kernel.org Signed-off-by: Sasha Levin