Applied "spi: s3c64xx: pass DMA arguments in platform data" to the spi tree

[Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

The patch

   spi: s3c64xx: pass DMA arguments in platform data

has been applied to the spi tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From a0067db36a2f9733a2e956a44ef8145e6a809bdb Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
Date: Wed, 18 Nov 2015 15:21:32 +0100
Subject: [PATCH] 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: Arnd Bergmann <arnd-r2nGTMty4D4@public.gmane.org>
Signed-off-by: Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
---
 arch/arm/plat-samsung/devs.c              | 19 ++++++++++---------
 drivers/spi/spi-s3c64xx.c                 | 27 +++++++--------------------
 include/linux/platform_data/spi-s3c64xx.h |  2 ++
 3 files changed, 19 insertions(+), 29 deletions(-)

diff --git a/arch/arm/plat-samsung/devs.c b/arch/arm/plat-samsung/devs.c
index 82074625de5c..4c64ece1a308 100644
--- a/arch/arm/plat-samsung/devs.c
+++ b/arch/arm/plat-samsung/devs.c
@@ -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)
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index 8e86e7f6663a..b954c5444cca 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -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");
-			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;
+	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;
 	}
 
 	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);
diff --git a/include/linux/platform_data/spi-s3c64xx.h b/include/linux/platform_data/spi-s3c64xx.h
index d3889b98a1a1..fb5625bcca9a 100644
--- a/include/linux/platform_data/spi-s3c64xx.h
+++ b/include/linux/platform_data/spi-s3c64xx.h
@@ -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;
 };
 
 /**
-- 
2.6.2

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