linux/drivers/spi, branch v5.0

cross-tree: phase out dma_zalloc_coherent()

2019-01-08T12:58:37Z

We already need to zero out memory for dma_alloc_coherent(), as such using dma_zalloc_coherent() is superflous. Phase it out. This change was generated with the following Coccinelle SmPL patch: @ replace_dma_zalloc_coherent @ expression dev, size, data, handle, flags; @@ -dma_zalloc_coherent(dev, size, handle, flags) +dma_alloc_coherent(dev, size, handle, flags) Suggested-by: Christoph Hellwig Signed-off-by: Luis Chamberlain [hch: re-ran the script on the latest tree] Signed-off-by: Christoph Hellwig

Merge tag 'spi-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

2018-12-25T22:43:54Z

Pull spi updates from Mark Brown: "The main thing this release has been a lot of work on the integration with SPI NOR flashes, there's been some specific support for a while for controller features designed to make them perform better but it's not worked out as well as hoped so the interface has been redesigned in a way that will hopefully do better - it's already been adopted by a number of additional controllers so things are looking good. Otherwise most of the work has been driver specific: - Support for better integration with NOR flashes from Boris Brezillon and Yogesh Narayan Gaur plus usage of it in several drivers. - A big cleanup of the Rockchip driver from Emil Renner Berthing. - Lots of performance improvements for bcm2835 from Lukas Wunner. - Slave mode support for pxa2xx from Lubomir Rintel. - Support for Macronix MXIC, Mediatek MT7629 and MT8183, NPCM PSPI, and Renesas r8a77470" * tag 'spi-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (90 commits) spi: sh-msiof: Reduce the number of times write to and perform the transmission from FIFO spi: sh-msiof: Add r8a774c0 support doc: lpspi: Document DT bindings for LPSPI slave mode spi: lpspi: Let watermark change with send data length spi: lpspi: Add slave mode support spi: lpspi: Replace all "master" with "controller" spi: imx: drop useless member speed_hz from driver data struct spi: imx: rename config callback and add useful parameters spi: imx: style fixes spi: imx: mx51-ecspi: Move some initialisation to prepare_message hook. spi: imx: add a device specific prepare_message callback mtd: atmel-quadspi: disallow building on ebsa110 spi: Update NPCM PSPI controller documentation spi: npcm: Modify pspi send function spi: Use of_node_name_eq for node name comparisons spi: dw-mmio: add ACPI support spi: bcm2835: Synchronize with callback on DMA termination spi: bcm2835: Speed up FIFO access if fill level is known spi: bcm2835: Polish transfer of DMA prologue spi: spi-mem: add support for octal mode I/O data transfer ...

Merge remote-tracking branches 'spi/topic/mem' and 'spi/topic/mtd' into spi-next

2018-12-20T16:01:30Z

spi: sh-msiof: Reduce the number of times write to and perform the transmission from FIFO

2018-12-20T14:56:11Z

The current state of the spi-sh-msiof, in master transfer mode: if t-> bits_per_word <= 8, if the data length is divisible by 4 ((len & 3) = 0), the length of each word will be 32 bits In case of data length can not be divisible by 4 ((len & 3) != 0), always set each word to be 8 bits, this will increase the number of times that write to FIFO, increasing the number of times it should be transmitted. Assume that the number of bytes of data length more than 64 bytes, each transmission will write 64 times into the TFDR then transmit, a maximum one-time transmission will transmit 64 bytes if each word is 8 bits long. Switch to setting if t->bits_per_word <= 8, the word length will be 32 bits although the data length is not divisible by 4, then if leftover, will transmit the balance and the length of each words is 1 byte. The maximum each can transmit up to 64 x 4 (Data Size = 32 bits (4 bytes)) = 256 bytes. TMDR2 : Bits 28 to 24 BITLEN1[4:0] Data Size (8 to 32 bits) Bits 23 to 16 WDLEN1[7:0] Word Count (1 to 64 words) Signed-off-by: Hoan Nguyen An Signed-off-by: Mark Brown

spi: lpspi: Let watermark change with send data length

2018-12-13T11:57:28Z

Configure watermark to change with the length of the sent data. Support LPSPI sending message shorter than tx/rxfifosize. Signed-off-by: Clark Wang Signed-off-by: Mark Brown

spi: lpspi: Add slave mode support

2018-12-13T11:57:14Z

Add slave mode support to the fsl-lpspi driver, only in PIO mode. For now, there are some limitations for slave mode transmission: 1. The stale data in RXFIFO will be dropped when the Slave does any new transfer. 2. One transfer can be finished only after all transfer->len data been transferred to master device 3. Slave device only accepts transfer->len data. Any data longer than this from master device will be dropped. Any data shorter than this from master will cause LPSPI to stuck due to mentioned limitation 2. 4. Only PIO transfer is supported in Slave Mode. Wire connection: GND, SCK, MISO(to MISO of slave), MOSI(to MOSI of slave), SCS Signed-off-by: Clark Wang Signed-off-by: Mark Brown

spi: lpspi: Replace all "master" with "controller"

2018-12-13T11:56:28Z

In order to enable the slave mode and make the code more readable, replace all related structure names and object names which is named "master" with "controller". Signed-off-by: Clark Wang Signed-off-by: Mark Brown

Merge branch 'for-linus' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator into regulator-4.21

2018-12-11T20:44:49Z

spi: imx: drop useless member speed_hz from driver data struct

2018-12-11T12:00:18Z

The driver data's member variable just caches the transfer's speed_hz member. All users of the former now have access directly to the latter. So fix them to use the uncached value and remove the cache. Signed-off-by: Uwe Kleine-König Signed-off-by: Mark Brown

spi: imx: rename config callback and add useful parameters

2018-12-11T12:00:03Z

The config callback is called once per transfer while some things can (and should) be done on a per message manner. To have unambiguous naming in the end include "transfer" in the callback's name and rename the implementations accordingly. Also pass the driver struct and transfer which allows further simplifications in the following patch. There is no change in behavior intended here. Reviewed-by: Marek Vasut Signed-off-by: Uwe Kleine-König Signed-off-by: Mark Brown