Commit 7887f470 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'spi-fix-v4.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi 

Pull spi fixes from Mark Brown:
 "A bunch of really small fixes here, all driver specific and mostly in
  error handling and remove paths.

  The most important fixes are for the a3700 clock configuration and a
  fix for a nasty stall which could potentially cause data corruption
  with the xilinx driver"

* tag 'spi-fix-v4.15-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: atmel: fixed spin_lock usage inside atmel_spi_remove
  spi: sun4i: disable clocks in the remove function
  spi: rspi: Do not set SPCR_SPE in qspi_set_config_register()
  spi: Fix double "when"
  spi: a3700: Fix clk prescaling for coefficient over 15
  spi: xilinx: Detect stall with Unknown commands
  spi: imx: Update device tree binding documentation
parents 444fec19 4d029763

Documentation/devicetree/bindings/spi/fsl-imx-cspi.txt

+12 −6
Original line number Diff line number Diff line
@@ -12,24 +12,30 @@ Required properties: 
  - "fsl,imx53-ecspi" for SPI compatible with the one integrated on i.MX53 and later Soc

- reg : Offset and length of the register set for the device

- interrupts : Should contain CSPI/eCSPI interrupt

- cs-gpios : Specifies the gpio pins to be used for chipselects.

- clocks : Clock specifiers for both ipg and per clocks.

- clock-names : Clock names should include both "ipg" and "per"

See the clock consumer binding,

	Documentation/devicetree/bindings/clock/clock-bindings.txt

- dmas: DMA specifiers for tx and rx dma. See the DMA client binding,

		Documentation/devicetree/bindings/dma/dma.txt

- dma-names: DMA request names should include "tx" and "rx" if present.



Obsolete properties:

- fsl,spi-num-chipselects : Contains the number of the chipselect

Recommended properties:

- cs-gpios : GPIOs to use as chip selects, see spi-bus.txt.  While the native chip

select lines can be used, they appear to always generate a pulse between each

word of a transfer.  Most use cases will require GPIO based chip selects to

generate a valid transaction.



Optional properties:

- num-cs :  Number of total chip selects, see spi-bus.txt.

- dmas: DMA specifiers for tx and rx dma. See the DMA client binding,

Documentation/devicetree/bindings/dma/dma.txt.

- dma-names: DMA request names, if present, should include "tx" and "rx".

- fsl,spi-rdy-drctl: Integer, representing the value of DRCTL, the register

controlling the SPI_READY handling. Note that to enable the DRCTL consideration,

the SPI_READY mode-flag needs to be set too.

Valid values are: 0 (disabled), 1 (edge-triggered burst) and 2 (level-triggered burst).



Obsolete properties:

- fsl,spi-num-chipselects : Contains the number of the chipselect



Example:



ecspi@70010000 {

drivers/spi/spi-armada-3700.c

+8 −0
Original line number Diff line number Diff line
@@ -79,6 +79,7 @@ 
#define A3700_SPI_BYTE_LEN		BIT(5)

#define A3700_SPI_CLK_PRESCALE		BIT(0)

#define A3700_SPI_CLK_PRESCALE_MASK	(0x1f)

#define A3700_SPI_CLK_EVEN_OFFS		(0x10)



#define A3700_SPI_WFIFO_THRS_BIT	28

#define A3700_SPI_RFIFO_THRS_BIT	24
@@ -220,6 +221,13 @@ static void a3700_spi_clock_set(struct a3700_spi *a3700_spi, 


	prescale = DIV_ROUND_UP(clk_get_rate(a3700_spi->clk), speed_hz);



	/* For prescaler values over 15, we can only set it by steps of 2.

	 * Starting from A3700_SPI_CLK_EVEN_OFFS, we set values from 0 up to

	 * 30. We only use this range from 16 to 30.

	 */

	if (prescale > 15)

		prescale = A3700_SPI_CLK_EVEN_OFFS + DIV_ROUND_UP(prescale, 2);



	val = spireg_read(a3700_spi, A3700_SPI_IF_CFG_REG);

	val = val & ~A3700_SPI_CLK_PRESCALE_MASK;

drivers/spi/spi-atmel.c

+1 −1
Original line number Diff line number Diff line
@@ -1661,12 +1661,12 @@ static int atmel_spi_remove(struct platform_device *pdev) 
	pm_runtime_get_sync(&pdev->dev);



	/* reset the hardware and block queue progress */

	spin_lock_irq(&as->lock);

	if (as->use_dma) {

		atmel_spi_stop_dma(master);

		atmel_spi_release_dma(master);

	}



	spin_lock_irq(&as->lock);

	spi_writel(as, CR, SPI_BIT(SWRST));

	spi_writel(as, CR, SPI_BIT(SWRST)); /* AT91SAM9263 Rev B workaround */

	spi_readl(as, SR);

drivers/spi/spi-rspi.c

+2 −2
Original line number Diff line number Diff line
@@ -377,8 +377,8 @@ static int qspi_set_config_register(struct rspi_data *rspi, int access_size) 
	/* Sets SPCMD */

	rspi_write16(rspi, rspi->spcmd, RSPI_SPCMD0);



	/* Enables SPI function in master mode */

	rspi_write8(rspi, SPCR_SPE | SPCR_MSTR, RSPI_SPCR);

	/* Sets RSPI mode */

	rspi_write8(rspi, SPCR_MSTR, RSPI_SPCR);



	return 0;

}

drivers/spi/spi-sun4i.c

+1 −1
Original line number Diff line number Diff line
@@ -525,7 +525,7 @@ err_free_master: 


static int sun4i_spi_remove(struct platform_device *pdev)

{

	pm_runtime_disable(&pdev->dev);

	pm_runtime_force_suspend(&pdev->dev);



	return 0;

}

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