ARM: davinci: add skeleton for pdata-quirks

Add skeleton pdata-quirks for davinci.
Signed-off-by: NKevin Hilman <khilman@baylibre.com>
[nsekhar@ti.com: move changes to build pdata-quirks.c and call
		 to pdata_quirks_init() to this patch]
Signed-off-by: NSekhar Nori <nsekhar@ti.com>

arch/arm/mach-davinci/Makefile

@@ -21,7 +21,7 @@ obj-$(CONFIG_AINTC)			+= irq.o
 obj-$(CONFIG_CP_INTC)			+= cp_intc.o
 
 # Board specific
-obj-$(CONFIG_MACH_DA8XX_DT)		+= da8xx-dt.o
+obj-$(CONFIG_MACH_DA8XX_DT)		+= da8xx-dt.o pdata-quirks.o
 obj-$(CONFIG_MACH_DAVINCI_EVM)  	+= board-dm644x-evm.o
 obj-$(CONFIG_MACH_SFFSDR)		+= board-sffsdr.o
 obj-$(CONFIG_MACH_NEUROS_OSD2)		+= board-neuros-osd2.o

arch/arm/mach-davinci/da8xx-dt.c

@@ -62,6 +62,7 @@ static void __init da850_init_machine(void)
 
 	of_platform_default_populate(NULL, da850_auxdata_lookup, NULL);
 	davinci_pm_init();
+	pdata_quirks_init();
 }
 
 static const char *const da850_boards_compat[] __initconst = {

arch/arm/mach-davinci/include/mach/common.h

@@ -102,6 +102,8 @@ int davinci_pm_init(void);
 static inline int davinci_pm_init(void) { return 0; }
 #endif
 
+void __init pdata_quirks_init(void);
+
 #define SRAM_SIZE	SZ_128K
 
 #endif /* __ARCH_ARM_MACH_DAVINCI_COMMON_H */

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

+/*
+ * Legacy platform_data quirks
+ *
+ * Copyright (C) 2016 BayLibre, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/of_platform.h>
+
+#include <mach/common.h>
+
+struct pdata_init {
+	const char *compatible;
+	void (*fn)(void);
+};
+
+static void pdata_quirks_check(struct pdata_init *quirks)
+{
+	while (quirks->compatible) {
+		if (of_machine_is_compatible(quirks->compatible)) {
+			if (quirks->fn)
+				quirks->fn();
+			break;
+		}
+		quirks++;
+	}
+}
+
+static struct pdata_init pdata_quirks[] __initdata = {
+	{ /* sentinel */ },
+};
+
+void __init pdata_quirks_init(void)
+{
+	pdata_quirks_check(pdata_quirks);
+}