[PATCH 25/34] dma: imx-dma: remove mach/hardware.h inclusion

Shawn Guo shawn.guo at linaro.org
Mon Sep 17 01:34:54 EDT 2012


It changes the driver to use platform_device_id rather than cpu_is_xxx
to determine the controller type, and updates the platform code
accordingly.

As the result, mach/hardware.h inclusion gets removed from the driver.

Signed-off-by: Shawn Guo <shawn.guo at linaro.org>
Cc: Vinod Koul <vinod.koul at linux.intel.com>
---
 arch/arm/mach-imx/devices/devices-common.h   |    2 +-
 arch/arm/mach-imx/devices/platform-imx-dma.c |    4 +-
 arch/arm/mach-imx/mm-imx1.c                  |    3 +-
 arch/arm/mach-imx/mm-imx21.c                 |    3 +-
 arch/arm/mach-imx/mm-imx27.c                 |    3 +-
 drivers/dma/imx-dma.c                        |   54 +++++++++++++++++++++++---
 6 files changed, 57 insertions(+), 12 deletions(-)

diff --git a/arch/arm/mach-imx/devices/devices-common.h b/arch/arm/mach-imx/devices/devices-common.h
index a330159..7f2698c 100644
--- a/arch/arm/mach-imx/devices/devices-common.h
+++ b/arch/arm/mach-imx/devices/devices-common.h
@@ -311,7 +311,7 @@ struct platform_device *__init imx_add_spi_imx(
 		const struct imx_spi_imx_data *data,
 		const struct spi_imx_master *pdata);
 
-struct platform_device *imx_add_imx_dma(resource_size_t iobase,
+struct platform_device *imx_add_imx_dma(char *name, resource_size_t iobase,
 					int irq, int irq_err);
 struct platform_device *imx_add_imx_sdma(char *name,
 	resource_size_t iobase, int irq, struct sdma_platform_data *pdata);
diff --git a/arch/arm/mach-imx/devices/platform-imx-dma.c b/arch/arm/mach-imx/devices/platform-imx-dma.c
index f9003e4..ccdb5dc 100644
--- a/arch/arm/mach-imx/devices/platform-imx-dma.c
+++ b/arch/arm/mach-imx/devices/platform-imx-dma.c
@@ -8,7 +8,7 @@
  */
 #include "devices-common.h"
 
-struct platform_device __init __maybe_unused *imx_add_imx_dma(
+struct platform_device __init __maybe_unused *imx_add_imx_dma(char *name,
 	resource_size_t iobase, int irq, int irq_err)
 {
 	struct resource res[] = {
@@ -28,7 +28,7 @@ struct platform_device __init __maybe_unused *imx_add_imx_dma(
 	};
 
 	return platform_device_register_resndata(&mxc_ahb_bus,
-			"imx-dma", -1, res, ARRAY_SIZE(res), NULL, 0);
+			name, -1, res, ARRAY_SIZE(res), NULL, 0);
 }
 
 struct platform_device __init __maybe_unused *imx_add_imx_sdma(char *name,
diff --git a/arch/arm/mach-imx/mm-imx1.c b/arch/arm/mach-imx/mm-imx1.c
index 9de81bf..79f6c0b 100644
--- a/arch/arm/mach-imx/mm-imx1.c
+++ b/arch/arm/mach-imx/mm-imx1.c
@@ -60,6 +60,7 @@ void __init imx1_soc_init(void)
 						MX1_GPIO_INT_PORTC, 0);
 	mxc_register_gpio("imx1-gpio", 3, MX1_GPIO4_BASE_ADDR, SZ_256,
 						MX1_GPIO_INT_PORTD, 0);
-	imx_add_imx_dma(MX1_DMA_BASE_ADDR, MX1_DMA_INT, MX1_DMA_ERR);
+	imx_add_imx_dma("imx1-dma", MX1_DMA_BASE_ADDR,
+			MX1_DMA_INT, MX1_DMA_ERR);
 	pinctrl_provide_dummies();
 }
diff --git a/arch/arm/mach-imx/mm-imx21.c b/arch/arm/mach-imx/mm-imx21.c
index 1c29515..3b97ea6 100644
--- a/arch/arm/mach-imx/mm-imx21.c
+++ b/arch/arm/mach-imx/mm-imx21.c
@@ -90,7 +90,8 @@ void __init imx21_soc_init(void)
 	mxc_register_gpio("imx21-gpio", 5, MX21_GPIO6_BASE_ADDR, SZ_256, MX21_INT_GPIO, 0);
 
 	pinctrl_provide_dummies();
-	imx_add_imx_dma(MX21_DMA_BASE_ADDR, MX21_INT_DMACH0, 0); /* No ERR irq */
+	imx_add_imx_dma("imx21-dma", MX21_DMA_BASE_ADDR,
+			MX21_INT_DMACH0, 0); /* No ERR irq */
 	platform_device_register_simple("imx21-audmux", 0, imx21_audmux_res,
 					ARRAY_SIZE(imx21_audmux_res));
 }
diff --git a/arch/arm/mach-imx/mm-imx27.c b/arch/arm/mach-imx/mm-imx27.c
index d389f4a..91e8da8 100644
--- a/arch/arm/mach-imx/mm-imx27.c
+++ b/arch/arm/mach-imx/mm-imx27.c
@@ -91,7 +91,8 @@ void __init imx27_soc_init(void)
 	mxc_register_gpio("imx21-gpio", 5, MX27_GPIO6_BASE_ADDR, SZ_256, MX27_INT_GPIO, 0);
 
 	pinctrl_provide_dummies();
-	imx_add_imx_dma(MX27_DMA_BASE_ADDR, MX27_INT_DMACH0, 0); /* No ERR irq */
+	imx_add_imx_dma("imx27-dma", MX27_DMA_BASE_ADDR,
+			MX27_INT_DMACH0, 0); /* No ERR irq */
 	/* imx27 has the imx21 type audmux */
 	platform_device_register_simple("imx21-audmux", 0, imx27_audmux_res,
 					ARRAY_SIZE(imx27_audmux_res));
diff --git a/drivers/dma/imx-dma.c b/drivers/dma/imx-dma.c
index a947ce2..960c88b 100644
--- a/drivers/dma/imx-dma.c
+++ b/drivers/dma/imx-dma.c
@@ -29,7 +29,6 @@
 
 #include <asm/irq.h>
 #include <linux/platform_data/dma-imx.h>
-#include <mach/hardware.h>
 
 #include "dmaengine.h"
 #define IMXDMA_MAX_CHAN_DESCRIPTORS	16
@@ -167,6 +166,12 @@ struct imxdma_channel {
 	int				slot_2d;
 };
 
+enum imx_dma_type {
+	IMX1_DMA,
+	IMX21_DMA,
+	IMX27_DMA,
+};
+
 struct imxdma_engine {
 	struct device			*dev;
 	struct device_dma_parameters	dma_parms;
@@ -177,8 +182,40 @@ struct imxdma_engine {
 	spinlock_t			lock;
 	struct imx_dma_2d_config	slots_2d[IMX_DMA_2D_SLOTS];
 	struct imxdma_channel		channel[IMX_DMA_CHANNELS];
+	enum imx_dma_type		devtype;
 };
 
+static struct platform_device_id imx_dma_devtype[] = {
+	{
+		.name = "imx1-dma",
+		.driver_data = IMX1_DMA,
+	}, {
+		.name = "imx21-dma",
+		.driver_data = IMX21_DMA,
+	}, {
+		.name = "imx27-dma",
+		.driver_data = IMX27_DMA,
+	}, {
+		/* sentinel */
+	}
+};
+MODULE_DEVICE_TABLE(platform, imx_dma_devtype);
+
+static inline int is_imx1_dma(struct imxdma_engine *imxdma)
+{
+	return imxdma->devtype == IMX1_DMA;
+}
+
+static inline int is_imx21_dma(struct imxdma_engine *imxdma)
+{
+	return imxdma->devtype == IMX21_DMA;
+}
+
+static inline int is_imx27_dma(struct imxdma_engine *imxdma)
+{
+	return imxdma->devtype == IMX27_DMA;
+}
+
 static struct imxdma_channel *to_imxdma_chan(struct dma_chan *chan)
 {
 	return container_of(chan, struct imxdma_channel, chan);
@@ -212,7 +249,9 @@ static unsigned imx_dmav1_readl(struct imxdma_engine *imxdma, unsigned offset)
 
 static int imxdma_hw_chain(struct imxdma_channel *imxdmac)
 {
-	if (cpu_is_mx27())
+	struct imxdma_engine *imxdma = imxdmac->imxdma;
+
+	if (is_imx27_dma(imxdma))
 		return imxdmac->hw_chaining;
 	else
 		return 0;
@@ -267,7 +306,7 @@ static void imxdma_enable_hw(struct imxdma_desc *d)
 	imx_dmav1_writel(imxdma, imx_dmav1_readl(imxdma, DMA_CCR(channel)) |
 			 CCR_CEN | CCR_ACRPT, DMA_CCR(channel));
 
-	if ((cpu_is_mx21() || cpu_is_mx27()) &&
+	if (!is_imx1_dma(imxdma) &&
 			d->sg && imxdma_hw_chain(imxdmac)) {
 		d->sg = sg_next(d->sg);
 		if (d->sg) {
@@ -436,7 +475,7 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id)
 	struct imxdma_engine *imxdma = dev_id;
 	int i, disr;
 
-	if (cpu_is_mx21() || cpu_is_mx27())
+	if (!is_imx1_dma(imxdma))
 		imxdma_err_handler(irq, dev_id);
 
 	disr = imx_dmav1_readl(imxdma, DMA_DISR);
@@ -967,6 +1006,8 @@ static int __init imxdma_probe(struct platform_device *pdev)
 	if (!imxdma)
 		return -ENOMEM;
 
+	imxdma->devtype = pdev->id_entry->driver_data;
+
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	imxdma->base = devm_request_and_ioremap(&pdev->dev, res);
 	if (!imxdma->base)
@@ -990,7 +1031,7 @@ static int __init imxdma_probe(struct platform_device *pdev)
 	/* reset DMA module */
 	imx_dmav1_writel(imxdma, DCR_DRST, DMA_DCR);
 
-	if (cpu_is_mx1()) {
+	if (is_imx1_dma(imxdma)) {
 		ret = devm_request_irq(&pdev->dev, irq,
 				       dma_irq_handler, 0, "DMA", imxdma);
 		if (ret) {
@@ -1038,7 +1079,7 @@ static int __init imxdma_probe(struct platform_device *pdev)
 	for (i = 0; i < IMX_DMA_CHANNELS; i++) {
 		struct imxdma_channel *imxdmac = &imxdma->channel[i];
 
-		if (cpu_is_mx21() || cpu_is_mx27()) {
+		if (!is_imx1_dma(imxdma)) {
 			ret = devm_request_irq(&pdev->dev, irq + i,
 					dma_irq_handler, 0, "DMA", imxdma);
 			if (ret) {
@@ -1118,6 +1159,7 @@ static struct platform_driver imxdma_driver = {
 	.driver		= {
 		.name	= "imx-dma",
 	},
+	.id_table	= imx_dma_devtype,
 	.remove		= __exit_p(imxdma_remove),
 };
 
-- 
1.7.9.5




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