dma: imx-dma: remove cpu_is_xxx by using platform_device_id

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@linaro.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Javier Martin <javier.martin@vista-silicon.com>
Cc: Vinod Koul <vinod.koul@linux.intel.com>

arch/arm/mach-imx/clk-imx1.c

@@ -83,7 +83,8 @@ int __init mx1_clocks_init(unsigned long fref)
 			pr_err("imx1 clk %d: register failed with %ld\n",
 				i, PTR_ERR(clk[i]));
 
-	clk_register_clkdev(clk[dma_gate], "ahb", "imx-dma");
+	clk_register_clkdev(clk[dma_gate], "ahb", "imx1-dma");
+	clk_register_clkdev(clk[hclk], "ipg", "imx1-dma");
 	clk_register_clkdev(clk[csi_gate], NULL, "mx1-camera.0");
 	clk_register_clkdev(clk[mma_gate], "mma", NULL);
 	clk_register_clkdev(clk[usbd_gate], NULL, "imx_udc.0");

arch/arm/mach-imx/clk-imx21.c

@@ -163,8 +163,8 @@ int __init mx21_clocks_init(unsigned long lref, unsigned long href)
 	clk_register_clkdev(clk[usb_gate], "per", "imx21-hcd.0");
 	clk_register_clkdev(clk[usb_hclk_gate], "ahb", "imx21-hcd.0");
 	clk_register_clkdev(clk[nfc_gate], NULL, "imx21-nand.0");
-	clk_register_clkdev(clk[dma_hclk_gate], "ahb", "imx-dma");
-	clk_register_clkdev(clk[dma_gate], "ipg", "imx-dma");
+	clk_register_clkdev(clk[dma_hclk_gate], "ahb", "imx21-dma");
+	clk_register_clkdev(clk[dma_gate], "ipg", "imx21-dma");
 	clk_register_clkdev(clk[wdog_gate], NULL, "imx2-wdt.0");
 	clk_register_clkdev(clk[i2c_gate], NULL, "imx21-i2c.0");
 	clk_register_clkdev(clk[kpp_gate], NULL, "mxc-keypad");

arch/arm/mach-imx/clk-imx27.c

@@ -242,8 +242,8 @@ int __init mx27_clocks_init(unsigned long fref)
 	clk_register_clkdev(clk[nfc_baud_gate], NULL, "imx27-nand.0");
 	clk_register_clkdev(clk[vpu_baud_gate], "per", "coda-imx27.0");
 	clk_register_clkdev(clk[vpu_ahb_gate], "ahb", "coda-imx27.0");
-	clk_register_clkdev(clk[dma_ahb_gate], "ahb", "imx-dma");
-	clk_register_clkdev(clk[dma_ipg_gate], "ipg", "imx-dma");
+	clk_register_clkdev(clk[dma_ahb_gate], "ahb", "imx27-dma");
+	clk_register_clkdev(clk[dma_ipg_gate], "ipg", "imx27-dma");
 	clk_register_clkdev(clk[fec_ipg_gate], "ipg", "imx27-fec.0");
 	clk_register_clkdev(clk[fec_ahb_gate], "ahb", "imx27-fec.0");
 	clk_register_clkdev(clk[wdog_ipg_gate], NULL, "imx2-wdt.0");

arch/arm/mach-imx/devices/devices-common.h

@@ -329,7 +329,7 @@ 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);

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,

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();
 }

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));
 }

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));

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),
 };
 

include/linux/platform_data/dma-imx.h

@@ -61,7 +61,9 @@ static inline int imx_dma_is_ipu(struct dma_chan *chan)
 static inline int imx_dma_is_general_purpose(struct dma_chan *chan)
 {
 	return strstr(dev_name(chan->device->dev), "sdma") ||
-		!strcmp(dev_name(chan->device->dev), "imx-dma");
+		!strcmp(dev_name(chan->device->dev), "imx1-dma") ||
+		!strcmp(dev_name(chan->device->dev), "imx21-dma") ||
+		!strcmp(dev_name(chan->device->dev), "imx27-dma");
 }
 
 #endif