dmaengine: ti: omap-dma: Pass sdma auxdata to driver and use it

We can now start passing sdma auxdata to the dmaengine driver to start
removing the platform based sdma init.

Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: Russell King <rmk+kernel@armlinux.org.uk>
Cc: Vinod Koul <vkoul@kernel.org>
Acked-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Tested-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/common.h

@@ -345,9 +345,12 @@ static inline int dra7xx_pciess_reset(struct omap_hwmod *oh)
 }
 #endif
 
+struct omap_system_dma_plat_info;
+
 void pdata_quirks_init(const struct of_device_id *);
 void omap_auxdata_legacy_init(struct device *dev);
 void omap_pcs_legacy_init(int irq, void (*rearm)(void));
+extern struct omap_system_dma_plat_info dma_plat_info;
 
 struct omap_sdrc_params;
 extern void omap_sdrc_init(struct omap_sdrc_params *sdrc_cs0,

arch/arm/mach-omap2/dma.c

@@ -217,7 +217,7 @@ static struct omap_dma_dev_attr dma_attr = {
 	.lch_count = 32,
 };
 
-static struct omap_system_dma_plat_info dma_plat_info __initdata = {
+struct omap_system_dma_plat_info dma_plat_info = {
 	.reg_map	= reg_map,
 	.channel_stride	= 0x60,
 	.dma_attr	= &dma_attr,

arch/arm/mach-omap2/pdata-quirks.c

@@ -514,6 +514,7 @@ static struct of_dev_auxdata omap_auxdata_lookup[] = {
 	/* Common auxdata */
 	OF_DEV_AUXDATA("ti,sysc", 0, NULL, &ti_sysc_pdata),
 	OF_DEV_AUXDATA("pinctrl-single", 0, NULL, &pcs_pdata),
+	OF_DEV_AUXDATA("ti,omap-sdma", 0, NULL, &dma_plat_info),
 	{ /* sentinel */ },
 };
 

drivers/dma/ti/omap-dma.c

@@ -1585,14 +1585,18 @@ static int omap_dma_probe(struct platform_device *pdev)
 		return PTR_ERR(od->base);
 
 	conf = of_device_get_match_data(&pdev->dev);
-	if (conf)
+	if (conf) {
 		od->cfg = conf;
-	else
+		od->plat = dev_get_platdata(&pdev->dev);
+		if (!od->plat)
+			dev_warn(&pdev->dev, "no sdma auxdata needed?\n");
+	} else {
 		od->cfg = &default_cfg;
 
-	od->plat = omap_get_plat_info();
-	if (!od->plat)
-		return -EPROBE_DEFER;
+		od->plat = omap_get_plat_info();
+		if (!od->plat)
+			return -EPROBE_DEFER;
+	}
 
 	od->reg_map = od->plat->reg_map;