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Commit a0067db3 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Mark Brown
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spi: s3c64xx: pass DMA arguments in platform data 



The s3c64xx platform data already contains a pointer to the
DMA filter function, but not to the associated data.

This simplifies the code and makes it more generic by
passing the data along with the filter function like
we do for other drivers.

Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 8005c49d

arch/arm/plat-samsung/devs.c

+10 −9
Original line number Diff line number Diff line
@@ -1100,9 +1100,7 @@ struct platform_device s3c_device_wdt = { 
#ifdef CONFIG_S3C64XX_DEV_SPI0

static struct resource s3c64xx_spi0_resource[] = {

	[0] = DEFINE_RES_MEM(S3C_PA_SPI0, SZ_256),

	[1] = DEFINE_RES_DMA(DMACH_SPI0_TX),

	[2] = DEFINE_RES_DMA(DMACH_SPI0_RX),

	[3] = DEFINE_RES_IRQ(IRQ_SPI0),

	[1] = DEFINE_RES_IRQ(IRQ_SPI0),

};



struct platform_device s3c64xx_device_spi0 = {
@@ -1130,6 +1128,8 @@ void __init s3c64xx_spi0_set_platdata(int (*cfg_gpio)(void), int src_clk_nr, 
	pd.num_cs = num_cs;

	pd.src_clk_nr = src_clk_nr;

	pd.cfg_gpio = (cfg_gpio) ? cfg_gpio : s3c64xx_spi0_cfg_gpio;

	pd.dma_tx = (void *)DMACH_SPI0_TX;

	pd.dma_rx = (void *)DMACH_SPI0_RX;

#if defined(CONFIG_PL330_DMA)

	pd.filter = pl330_filter;

#elif defined(CONFIG_S3C64XX_PL080)
@@ -1145,9 +1145,7 @@ void __init s3c64xx_spi0_set_platdata(int (*cfg_gpio)(void), int src_clk_nr, 
#ifdef CONFIG_S3C64XX_DEV_SPI1

static struct resource s3c64xx_spi1_resource[] = {

	[0] = DEFINE_RES_MEM(S3C_PA_SPI1, SZ_256),

	[1] = DEFINE_RES_DMA(DMACH_SPI1_TX),

	[2] = DEFINE_RES_DMA(DMACH_SPI1_RX),

	[3] = DEFINE_RES_IRQ(IRQ_SPI1),

	[1] = DEFINE_RES_IRQ(IRQ_SPI1),

};



struct platform_device s3c64xx_device_spi1 = {
@@ -1175,12 +1173,15 @@ void __init s3c64xx_spi1_set_platdata(int (*cfg_gpio)(void), int src_clk_nr, 
	pd.num_cs = num_cs;

	pd.src_clk_nr = src_clk_nr;

	pd.cfg_gpio = (cfg_gpio) ? cfg_gpio : s3c64xx_spi1_cfg_gpio;

	pd.dma_tx = (void *)DMACH_SPI1_TX;

	pd.dma_rx = (void *)DMACH_SPI1_RX;

#if defined(CONFIG_PL330_DMA)

	pd.filter = pl330_filter;

#elif defined(CONFIG_S3C64XX_PL080)

	pd.filter = pl08x_filter_id;

#endif





	s3c_set_platdata(&pd, sizeof(pd), &s3c64xx_device_spi1);

}

#endif /* CONFIG_S3C64XX_DEV_SPI1 */
@@ -1188,9 +1189,7 @@ void __init s3c64xx_spi1_set_platdata(int (*cfg_gpio)(void), int src_clk_nr, 
#ifdef CONFIG_S3C64XX_DEV_SPI2

static struct resource s3c64xx_spi2_resource[] = {

	[0] = DEFINE_RES_MEM(S3C_PA_SPI2, SZ_256),

	[1] = DEFINE_RES_DMA(DMACH_SPI2_TX),

	[2] = DEFINE_RES_DMA(DMACH_SPI2_RX),

	[3] = DEFINE_RES_IRQ(IRQ_SPI2),

	[1] = DEFINE_RES_IRQ(IRQ_SPI2),

};



struct platform_device s3c64xx_device_spi2 = {
@@ -1218,6 +1217,8 @@ void __init s3c64xx_spi2_set_platdata(int (*cfg_gpio)(void), int src_clk_nr, 
	pd.num_cs = num_cs;

	pd.src_clk_nr = src_clk_nr;

	pd.cfg_gpio = (cfg_gpio) ? cfg_gpio : s3c64xx_spi2_cfg_gpio;

	pd.dma_tx = (void *)DMACH_SPI2_TX;

	pd.dma_rx = (void *)DMACH_SPI2_RX;

#if defined(CONFIG_PL330_DMA)

	pd.filter = pl330_filter;

#elif defined(CONFIG_S3C64XX_PL080)

drivers/spi/spi-s3c64xx.c

+7 −20
Original line number Diff line number Diff line
@@ -133,7 +133,6 @@ 
struct s3c64xx_spi_dma_data {

	struct dma_chan *ch;

	enum dma_transfer_direction direction;

	unsigned int dmach;

};



/**
@@ -325,7 +324,7 @@ static int s3c64xx_spi_prepare_transfer(struct spi_master *spi) 


		/* Acquire DMA channels */

		sdd->rx_dma.ch = dma_request_slave_channel_compat(mask, filter,

				   (void *)(long)sdd->rx_dma.dmach, dev, "rx");

				   sdd->cntrlr_info->dma_rx, dev, "rx");

		if (!sdd->rx_dma.ch) {

			dev_err(dev, "Failed to get RX DMA channel\n");

			ret = -EBUSY;
@@ -334,7 +333,7 @@ static int s3c64xx_spi_prepare_transfer(struct spi_master *spi) 
		spi->dma_rx = sdd->rx_dma.ch;



		sdd->tx_dma.ch = dma_request_slave_channel_compat(mask, filter,

				   (void *)(long)sdd->tx_dma.dmach, dev, "tx");

				   sdd->cntrlr_info->dma_tx, dev, "tx");

		if (!sdd->tx_dma.ch) {

			dev_err(dev, "Failed to get TX DMA channel\n");

			ret = -EBUSY;
@@ -1028,7 +1027,6 @@ static inline struct s3c64xx_spi_port_config *s3c64xx_spi_get_port_config( 
static int s3c64xx_spi_probe(struct platform_device *pdev)

{

	struct resource	*mem_res;

	struct resource	*res;

	struct s3c64xx_spi_driver_data *sdd;

	struct s3c64xx_spi_info *sci = dev_get_platdata(&pdev->dev);

	struct spi_master *master;
@@ -1087,20 +1085,9 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) 


	sdd->cur_bpw = 8;



	if (!sdd->pdev->dev.of_node) {

		res = platform_get_resource(pdev, IORESOURCE_DMA,  0);

		if (!res) {

			dev_warn(&pdev->dev, "Unable to get SPI tx dma resource. Switching to poll mode\n");

	if (!sdd->pdev->dev.of_node && (!sci->dma_tx || !sci->dma_rx)) {

		dev_warn(&pdev->dev, "Unable to get SPI tx/rx DMA data. Switching to poll mode\n");

		sdd->port_conf->quirks = S3C64XX_SPI_QUIRK_POLL;

		} else

			sdd->tx_dma.dmach = res->start;



		res = platform_get_resource(pdev, IORESOURCE_DMA,  1);

		if (!res) {

			dev_warn(&pdev->dev, "Unable to get SPI rx dma resource. Switching to poll mode\n");

			sdd->port_conf->quirks = S3C64XX_SPI_QUIRK_POLL;

		} else

			sdd->rx_dma.dmach = res->start;

	}



	sdd->tx_dma.direction = DMA_MEM_TO_DEV;
@@ -1197,9 +1184,9 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) 


	dev_dbg(&pdev->dev, "Samsung SoC SPI Driver loaded for Bus SPI-%d with %d Slaves attached\n",

					sdd->port_id, master->num_chipselect);

	dev_dbg(&pdev->dev, "\tIOmem=[%pR]\tFIFO %dbytes\tDMA=[Rx-%d, Tx-%d]\n",

	dev_dbg(&pdev->dev, "\tIOmem=[%pR]\tFIFO %dbytes\tDMA=[Rx-%p, Tx-%p]\n",

					mem_res, (FIFO_LVL_MASK(sdd) >> 1) + 1,

					sdd->rx_dma.dmach, sdd->tx_dma.dmach);

					sci->dma_rx, sci->dma_tx);



	pm_runtime_mark_last_busy(&pdev->dev);

	pm_runtime_put_autosuspend(&pdev->dev);

include/linux/platform_data/spi-s3c64xx.h

+2 −0
Original line number Diff line number Diff line
@@ -40,6 +40,8 @@ struct s3c64xx_spi_info { 
	int num_cs;

	int (*cfg_gpio)(void);

	dma_filter_fn filter;

	void *dma_tx;

	void *dma_rx;

};



/**