linux-dev/drivers/dma/sh, branch master

dmaengine: sh: rcar-dmac: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper

2022-09-29T15:44:32Z

Zero-length arrays are deprecated and we are moving towards adopting C99 flexible-array members, instead. So, replace zero-length arrays declarations in anonymous union with the new DECLARE_FLEX_ARRAY() helper macro. This helper allows for flexible-array members in unions. Link: https://github.com/KSPP/linux/issues/193 Link: https://github.com/KSPP/linux/issues/217 Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html Signed-off-by: Gustavo A. R. Silva Reviewed-by: Kees Cook Link: https://lore.kernel.org/r/YzIdsJqsR3LH2qEK@work Signed-off-by: Vinod Koul

dmaengine: sh: rz-dmac: Add device_synchronize callback

2022-07-26T12:57:50Z

Some on-chip peripheral modules(for eg:- rspi) on RZ/G2L SoC use the same signal for both interrupt and DMA transfer requests. The signal works as a DMA transfer request signal by setting DMARS, and subsequent interrupt requests to the interrupt controller are masked. We can re-enable the interrupt by clearing the DMARS. This patch adds device_synchronize callback for clearing DMARS and thereby allowing DMA consumers to switch to interrupt mode. Signed-off-by: Biju Das Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20220722084430.969333-1-biju.das.jz@bp.renesas.com Signed-off-by: Vinod Koul

dmaengine: sh: Kconfig: Make RZ_DMAC depend on ARCH_RZG2L

2022-04-08T17:52:00Z

The DMAC block is identical on Renesas RZ/G2L, RZ/G2UL and RZ/V2L SoC's, so instead of adding dependency for each SoC's add dependency on ARCH_RZG2L. The ARCH_RZG2L config option is already selected by ARCH_R9A07G043, ARCH_R9A07G044 and ARCH_R9A07G054. Signed-off-by: Lad Prabhakar Link: https://lore.kernel.org/r/20220406080417.14593-1-prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Vinod Koul

dmaengine: sh: Kconfig: Add ARCH_R9A07G054 dependency for RZ_DMAC config option

2022-03-11T07:04:05Z

RZ/V2L DMA block is identical to one found on RZ/G2L SoC. This patch adds ARCH_R9A07G054 dependency for RZ_DMAC config option so that the driver can be enabled on RZ/V2L SoC. While at it, also update config help text. Signed-off-by: Lad Prabhakar Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20220221224321.11939-1-prabhakar.mahadev-lad.rj@bp.renesas.com Signed-off-by: Vinod Koul

dmaengine: Revert "dmaengine: shdma: Fix runtime PM imbalance on error"

2022-03-10T04:43:20Z

This reverts commit 455896c53d5b ("dmaengine: shdma: Fix runtime PM imbalance on error") as the patch wrongly reduced the count on error and did not bail out. So drop the count by reverting the patch . Signed-off-by: Vinod Koul

dmaengine: shdma: Fix runtime PM imbalance on error

2022-02-15T05:34:16Z

pm_runtime_get_() increments the runtime PM usage counter even when it returns an error code, thus a matching decrement is needed on the error handling path to keep the counter balanced. Signed-off-by: Yongzhi Liu Link: https://lore.kernel.org/r/1642311296-87020-1-git-send-email-lyz_cs@pku.edu.cn Signed-off-by: Vinod Koul

dmaengine: sh: rcar-dmac: Check for error num after dma_set_max_seg_size

2022-02-15T05:30:13Z

As the possible failure of the dma_set_max_seg_size(), it should be better to check the return value of the dma_set_max_seg_size(). Fixes: 97d49c59e219 ("dmaengine: rcar-dmac: set scatter/gather max segment size") Reported-by: Geert Uytterhoeven Signed-off-by: Jiasheng Jiang Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20220111011239.452837-1-jiasheng@iscas.ac.cn Signed-off-by: Vinod Koul

dmaengine: sh: rcar-dmac: Check for error num after setting mask

2022-02-15T05:27:17Z

Because of the possible failure of the dma_supported(), the dma_set_mask_and_coherent() may return error num. Therefore, it should be better to check it and return the error if fails. Fixes: dc312349e875 ("dmaengine: rcar-dmac: Widen DMA mask to 40 bits") Signed-off-by: Jiasheng Jiang Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20220106030939.2644320-1-jiasheng@iscas.ac.cn Signed-off-by: Vinod Koul

dmaengine: rcar-dmac: Add support for R-Car S4-8

2022-01-03T11:28:21Z

Add support for R-Car S4-8. We can reuse R-Car V3U code so that renames variable names as "gen4". Note that some registers of R-Car V3U do not exist on R-Car S4-8, but none of them are used by the driver for now. Signed-off-by: Yoshihiro Shimoda Reviewed-by: Ulrich Hecht Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20211222114507.1252947-3-yoshihiro.shimoda.uh@renesas.com Signed-off-by: Vinod Koul

Merge tag 'dmaengine_topic_slave_id_removal_5.17' into next

2021-12-17T16:12:17Z

Merge the tag dmaengine_topic_slave_id_removal_5.17 into next. This brings in the slave_id removal topic changes