linux/drivers/spi/spi-ti-qspi.c, branch v5.3

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 296

2019-06-05T15:36:38Z

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gplv2 this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 1 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Alexios Zavras Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190529141901.986607096@linutronix.de Signed-off-by: Greg Kroah-Hartman

spi: ti-qspi: Fix mmap read when more than one CS in use

2019-01-29T12:08:03Z

Commit 4dea6c9b0b64 ("spi: spi-ti-qspi: add mmap mode read support") has has got order of parameter wrong when calling regmap_update_bits() to select CS for mmap access. Mask and value arguments are interchanged. Code will work on a system with single slave, but fails when more than one CS is in use. Fix this by correcting the order of parameters when calling regmap_update_bits(). Fixes: 4dea6c9b0b64 ("spi: spi-ti-qspi: add mmap mode read support") Cc: stable@vger.kernel.org Signed-off-by: Vignesh R Signed-off-by: Mark Brown

spi: ti-qspi: Make sure res_mmap != NULL before dereferencing it

2018-05-17T04:36:00Z

resource_size() is dereferencing the res without checking that it is not NULL, so we need to do the check before calling resource_size(). Fixes: b95cb394ab59 ("spi: ti-qspi: Implement the spi_mem interface") Reported-by: Dan Carpenter Signed-off-by: Boris Brezillon Signed-off-by: Mark Brown

spi: Get rid of the spi_flash_read() API

2018-05-11T02:34:41Z

This API has been replaced by the spi_mem_xx() one, its only user (spi-nor) has been converted to spi_mem_xx() and all SPI controller drivers that were implementing the ->spi_flash_xxx() hooks are also implementing the spi_mem ones. So we can safely get rid of this API. Signed-off-by: Boris Brezillon Reviewed-by: Frieder Schrempf Tested-by: Frieder Schrempf Signed-off-by: Mark Brown

spi: ti-qspi: Implement the spi_mem interface

2018-05-11T02:33:42Z

The spi_mem interface is meant to replace the spi_flash_read() one. Implement the ->exec_op() method so that we can smoothly get rid of the old interface. Signed-off-by: Boris Brezillon Reviewed-by: Vignesh R Tested-by: Vignesh R Signed-off-by: Mark Brown

Merge remote-tracking branches 'spi/topic/ti-qspi' and 'spi/topic/xlp' into spi-next

2017-04-26T14:58:22Z

spi: spi-ti-qspi: Use bounce buffer if read buffer is not DMA'ble

2017-04-21T17:03:53Z

Flash filesystems like JFFS2, UBIFS and MTD block layer can provide vmalloc'd or kmap'd buffers that cannot be mapped using dma_map_sg() and can potentially be in memory region above 32bit addressable region(ie buffers belonging to memory region backed by LPAE) of DMA, implement spi_flash_can_dma() interface to inform SPI core not to map such buffers. When buffers are not mapped for DMA, then use a pre allocated bounce buffer(64K = typical flash erase sector size) to read from flash and then do a copy to actual destination buffer. This is approach is much faster than using memcpy using CPU and also reduces CPU load. With this patch, UBIFS read speed is ~18MB/s and CPU utilization <20% on DRA74 Rev H EVM. Performance degradation is negligible when compared with non bounce buffer case while using UBIFS. Signed-off-by: Vignesh R Signed-off-by: Mark Brown

spi: spi-ti-qspi: Remove unused dma_dev variable

2017-03-27T09:56:15Z

commit 1351aaeb50b2 ("spi: spi-ti-qspi: Use dma_engine wrapper for dma memcpy call") introduced this warning: drivers/spi/spi-ti-qspi.c: In function 'ti_qspi_dma_xfer': drivers/spi/spi-ti-qspi.c:398:21: warning: unused variable 'dma_dev' [-Wunused-variable] struct dma_device *dma_dev = chan->device; Fix it by removing the unused variable. Signed-off-by: Vignesh R Reported-by: Stephen Rothwell Signed-off-by: Mark Brown

spi: spi-ti-qspi: Use dma_engine wrapper for dma memcpy call

2017-03-24T18:39:53Z

Instead of calling device_prep_dma_memcpy() directly with dma_device pointer, use the newly introduced dmaengine_prep_dma_memcpy() wrapper API. Signed-off-by: Vignesh R Signed-off-by: Mark Brown

spi: spi-ti-qspi: Fix error handling

2017-02-19T16:27:35Z

'dma_request_chan_by_mask()' can not return NULL. Try to keep the logic in 'no_dma:' by resetting 'qspi->rx_chan' in case of error. Signed-off-by: Christophe JAILLET Signed-off-by: Mark Brown