From fd8d4e2d1f20e9a5dbbdb16ee9b594726a7c5a2d Mon Sep 17 00:00:00 2001 From: jiada wang Date: Thu, 8 Jun 2017 14:16:00 +0900 Subject: [PATCH] spi: imx: introduce fifo_size and has_dmamode in spi_imx_devtype_data Different ECSPI controller has different fifosize and DMA capability, instead of calling functions to identify these information by check devtype. add fifo_size and has_dmamode to spi_imx_devtype_data. so that these information can be directly accessed. Signed-off-by: Jiada Wang Reviewed-by: Sascha Hauer Signed-off-by: Mark Brown --- drivers/spi/spi-imx.c | 27 ++++++++++++++++++--------- 1 file changed, 18 insertions(+), 9 deletions(-) diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index f9698b7..d3093f3 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -74,6 +74,8 @@ struct spi_imx_devtype_data { void (*trigger)(struct spi_imx_data *); int (*rx_available)(struct spi_imx_data *); void (*reset)(struct spi_imx_data *); + bool has_dmamode; + unsigned int fifo_size; enum spi_imx_devtype devtype; }; @@ -125,11 +127,6 @@ static inline int is_imx51_ecspi(struct spi_imx_data *d) return d->devtype_data->devtype == IMX51_ECSPI; } -static inline unsigned spi_imx_get_fifosize(struct spi_imx_data *d) -{ - return is_imx51_ecspi(d) ? 64 : 8; -} - #define MXC_SPI_BUF_RX(type) \ static void spi_imx_buf_rx_##type(struct spi_imx_data *spi_imx) \ { \ @@ -219,7 +216,7 @@ static bool spi_imx_can_dma(struct spi_master *master, struct spi_device *spi, if (bytes_per_word != 1 && bytes_per_word != 2 && bytes_per_word != 4) return false; - for (i = spi_imx_get_fifosize(spi_imx) / 2; i > 0; i--) { + for (i = spi_imx->devtype_data->fifo_size / 2; i > 0; i--) { if (!(transfer->len % (i * bytes_per_word))) break; } @@ -693,6 +690,8 @@ static struct spi_imx_devtype_data imx1_cspi_devtype_data = { .trigger = mx1_trigger, .rx_available = mx1_rx_available, .reset = mx1_reset, + .fifo_size = 8, + .has_dmamode = false, .devtype = IMX1_CSPI, }; @@ -702,6 +701,8 @@ static struct spi_imx_devtype_data imx21_cspi_devtype_data = { .trigger = mx21_trigger, .rx_available = mx21_rx_available, .reset = mx21_reset, + .fifo_size = 8, + .has_dmamode = false, .devtype = IMX21_CSPI, }; @@ -712,6 +713,8 @@ static struct spi_imx_devtype_data imx27_cspi_devtype_data = { .trigger = mx21_trigger, .rx_available = mx21_rx_available, .reset = mx21_reset, + .fifo_size = 8, + .has_dmamode = false, .devtype = IMX27_CSPI, }; @@ -721,6 +724,8 @@ static struct spi_imx_devtype_data imx31_cspi_devtype_data = { .trigger = mx31_trigger, .rx_available = mx31_rx_available, .reset = mx31_reset, + .fifo_size = 8, + .has_dmamode = false, .devtype = IMX31_CSPI, }; @@ -731,6 +736,8 @@ static struct spi_imx_devtype_data imx35_cspi_devtype_data = { .trigger = mx31_trigger, .rx_available = mx31_rx_available, .reset = mx31_reset, + .fifo_size = 8, + .has_dmamode = true, .devtype = IMX35_CSPI, }; @@ -740,6 +747,8 @@ static struct spi_imx_devtype_data imx51_ecspi_devtype_data = { .trigger = mx51_ecspi_trigger, .rx_available = mx51_ecspi_rx_available, .reset = mx51_ecspi_reset, + .fifo_size = 64, + .has_dmamode = true, .devtype = IMX51_ECSPI, }; @@ -791,7 +800,7 @@ static void spi_imx_chipselect(struct spi_device *spi, int is_active) static void spi_imx_push(struct spi_imx_data *spi_imx) { - while (spi_imx->txfifo < spi_imx_get_fifosize(spi_imx)) { + while (spi_imx->txfifo < spi_imx->devtype_data->fifo_size) { if (!spi_imx->count) break; spi_imx->tx(spi_imx); @@ -938,7 +947,7 @@ static int spi_imx_sdma_init(struct device *dev, struct spi_imx_data *spi_imx, if (of_machine_is_compatible("fsl,imx6dl")) return 0; - spi_imx->wml = spi_imx_get_fifosize(spi_imx) / 2; + spi_imx->wml = spi_imx->devtype_data->fifo_size / 2; /* Prepare for TX DMA: */ master->dma_tx = dma_request_slave_channel_reason(dev, "tx"); @@ -1262,7 +1271,7 @@ static int spi_imx_probe(struct platform_device *pdev) * Only validated on i.mx35 and i.mx6 now, can remove the constraint * if validated on other chips. */ - if (is_imx35_cspi(spi_imx) || is_imx51_ecspi(spi_imx)) { + if (spi_imx->devtype_data->has_dmamode) { ret = spi_imx_sdma_init(&pdev->dev, spi_imx, master); if (ret == -EPROBE_DEFER) goto out_clk_put; -- 2.7.4