From 015760563ec77bf17cec712fa94afdf53b285287 Mon Sep 17 00:00:00 2001 From: Hisashi Nakamura Date: Mon, 15 Dec 2014 23:01:11 +0900 Subject: spi: sh-msiof: Add runtime PM lock in initializing SH-MSIOF driver is enabled autosuspend API of spi framework. But autosuspend framework doesn't work during initializing. So runtime PM lock is added in SH-MSIOF driver initializing. Fixes: e2a0ba547ba31c (spi: sh-msiof: Convert to spi core auto_runtime_pm framework) Signed-off-by: Hisashi Nakamura Signed-off-by: Yoshihiro Kaneko Signed-off-by: Mark Brown Cc: stable@vger.kernel.org --- drivers/spi/spi-sh-msiof.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'drivers') diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c index 3f365402fcc0..14052936b1c5 100644 --- a/drivers/spi/spi-sh-msiof.c +++ b/drivers/spi/spi-sh-msiof.c @@ -480,6 +480,8 @@ static int sh_msiof_spi_setup(struct spi_device *spi) struct device_node *np = spi->master->dev.of_node; struct sh_msiof_spi_priv *p = spi_master_get_devdata(spi->master); + pm_runtime_get_sync(&p->pdev->dev); + if (!np) { /* * Use spi->controller_data for CS (same strategy as spi_gpio), @@ -498,6 +500,9 @@ static int sh_msiof_spi_setup(struct spi_device *spi) if (spi->cs_gpio >= 0) gpio_set_value(spi->cs_gpio, !(spi->mode & SPI_CS_HIGH)); + + pm_runtime_put_sync(&p->pdev->dev); + return 0; } -- cgit v1.2.3 From c0e7dc21d33caa31296d1e4af1e99008359f1b64 Mon Sep 17 00:00:00 2001 From: Andrew Bresticker Date: Tue, 16 Dec 2014 13:05:44 -0800 Subject: spi: img-spfi: Enable controller before starting TX DMA It is recommended that the SPFI controller be enabled (i.e. setting SPFI_EN in SPFI_CONTROL) before TX DMA begins. Signed-off-by: Andrew Bresticker Signed-off-by: Mark Brown --- drivers/spi/spi-img-spfi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/spi/spi-img-spfi.c b/drivers/spi/spi-img-spfi.c index b410499cddca..cd14556852bf 100644 --- a/drivers/spi/spi-img-spfi.c +++ b/drivers/spi/spi-img-spfi.c @@ -390,14 +390,14 @@ static int img_spfi_start_dma(struct spi_master *master, dma_async_issue_pending(spfi->rx_ch); } + spfi_start(spfi); + if (xfer->tx_buf) { spfi->tx_dma_busy = true; dmaengine_submit(txdesc); dma_async_issue_pending(spfi->tx_ch); } - spfi_start(spfi); - return 1; stop_dma: -- cgit v1.2.3 From 76fe5e95fac3c93bdff9102480e5ba823ba656c3 Mon Sep 17 00:00:00 2001 From: Andrew Bresticker Date: Mon, 22 Dec 2014 11:35:15 -0800 Subject: spi: img-spfi: Increase DMA burst size A 1-byte burst size is rather inefficient and has been shown to cause TX issues during testing. Increase the DMA burst size to 4-bytes for both RX and TX DMA when using the 8-bit FIFO. Signed-off-by: Andrew Bresticker Signed-off-by: Mark Brown --- drivers/spi/spi-img-spfi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/spi/spi-img-spfi.c b/drivers/spi/spi-img-spfi.c index cd14556852bf..aad6683db81b 100644 --- a/drivers/spi/spi-img-spfi.c +++ b/drivers/spi/spi-img-spfi.c @@ -341,7 +341,7 @@ static int img_spfi_start_dma(struct spi_master *master, default: rxconf.src_addr = spfi->phys + SPFI_RX_8BIT_VALID_DATA; rxconf.src_addr_width = 1; - rxconf.src_maxburst = 1; + rxconf.src_maxburst = 4; } dmaengine_slave_config(spfi->rx_ch, &rxconf); @@ -368,7 +368,7 @@ static int img_spfi_start_dma(struct spi_master *master, default: txconf.dst_addr = spfi->phys + SPFI_TX_8BIT_VALID_DATA; txconf.dst_addr_width = 1; - txconf.dst_maxburst = 1; + txconf.dst_maxburst = 4; break; } dmaengine_slave_config(spfi->tx_ch, &txconf); -- cgit v1.2.3