ARM: OMAP2+: split omap2/3/4_check_revision function

We need to detect the SoC revision early, but the SoC
feature detection can be done later on. In order to allow
further clean-up later on, this patch separates the SoC
revision check from the SoC feature check.

This patch doesn't change functionality or behavior of the code
execution; it barely cleans up the code and splits into SoC
specific implementation for Rev ID and feature detection.

Signed-off-by: Vaibhav Hiremath <hvaibhav@ti.com>
[tony@atomide.com: updated comments]
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/id.c

@@ -112,7 +112,7 @@ void omap_get_die_id(struct omap_die_id *odi)
 	odi->id_3 = read_tap_reg(OMAP_TAP_DIE_ID_3);
 }
 
-static void __init omap24xx_check_revision(void)
+void __init omap2xxx_check_revision(void)
 {
 	int i, j;
 	u32 idcode, prod_id;
@@ -222,7 +222,7 @@ static void __init omap3_cpuinfo(void)
 		omap_features |= OMAP3_HAS_ ##feat;			\
 	}
 
-static void __init omap3_check_features(void)
+void __init omap3xxx_check_features(void)
 {
 	u32 status;
 
@@ -249,9 +249,11 @@ static void __init omap3_check_features(void)
 	 * TODO: Get additional info (where applicable)
 	 *       e.g. Size of L2 cache.
 	 */
+
+	omap3_cpuinfo();
 }
 
-static void __init omap4_check_features(void)
+void __init omap4xxx_check_features(void)
 {
 	u32 si_type;
 
@@ -276,12 +278,13 @@ static void __init omap4_check_features(void)
 	}
 }
 
-static void __init ti81xx_check_features(void)
+void __init ti81xx_check_features(void)
 {
 	omap_features = OMAP3_HAS_NEON;
+	omap3_cpuinfo();
 }
 
-static void __init omap3_check_revision(void)
+void __init omap3xxx_check_revision(void)
 {
 	u32 cpuid, idcode;
 	u16 hawkeye;
@@ -421,7 +424,7 @@ static void __init omap3_check_revision(void)
 	}
 }
 
-static void __init omap4_check_revision(void)
+void __init omap4xxx_check_revision(void)
 {
 	u32 idcode;
 	u16 hawkeye;
@@ -494,37 +497,6 @@ static void __init omap4_check_revision(void)
 		((omap_rev() >> 12) & 0xf), ((omap_rev() >> 8) & 0xf));
 }
 
-/*
- * Try to detect the exact revision of the omap we're running on
- */
-void __init omap2_check_revision(void)
-{
-	/*
-	 * At this point we have an idea about the processor revision set
-	 * earlier with omap2_set_globals_tap().
-	 */
-	if (cpu_is_omap24xx()) {
-		omap24xx_check_revision();
-	} else if (cpu_is_omap34xx()) {
-		omap3_check_revision();
-
-		/* TI81XX doesn't have feature register */
-		if (!cpu_is_ti81xx())
-			omap3_check_features();
-		else
-			ti81xx_check_features();
-
-		omap3_cpuinfo();
-		return;
-	} else if (cpu_is_omap44xx()) {
-		omap4_check_revision();
-		omap4_check_features();
-		return;
-	} else {
-		pr_err("OMAP revision unknown, please fix!\n");
-	}
-}
-
 /*
  * Set up things for map_io and processor detection later on. Gets called
  * pretty much first thing from board init. For multi-omap, this gets

arch/arm/mach-omap2/io.c

@@ -342,7 +342,6 @@ static int _set_hwmod_postsetup_state(struct omap_hwmod *oh, void *data)
 
 static void __init omap_common_init_early(void)
 {
-	omap2_check_revision();
 	omap_init_consistent_dma_size();
 }
 
@@ -383,6 +382,7 @@ static void __init omap_hwmod_init_postsetup(void)
 void __init omap2420_init_early(void)
 {
 	omap2_set_globals_242x();
+	omap2xxx_check_revision();
 	omap_common_init_early();
 	omap2xxx_voltagedomains_init();
 	omap242x_powerdomains_init();
@@ -395,6 +395,7 @@ void __init omap2420_init_early(void)
 void __init omap2430_init_early(void)
 {
 	omap2_set_globals_243x();
+	omap2xxx_check_revision();
 	omap_common_init_early();
 	omap2xxx_voltagedomains_init();
 	omap243x_powerdomains_init();
@@ -413,6 +414,8 @@ void __init omap2430_init_early(void)
 void __init omap3_init_early(void)
 {
 	omap2_set_globals_3xxx();
+	omap3xxx_check_revision();
+	omap3xxx_check_features();
 	omap_common_init_early();
 	omap3xxx_voltagedomains_init();
 	omap3xxx_powerdomains_init();
@@ -445,6 +448,8 @@ void __init am35xx_init_early(void)
 void __init ti81xx_init_early(void)
 {
 	omap2_set_globals_ti81xx();
+	omap3xxx_check_revision();
+	ti81xx_check_features();
 	omap_common_init_early();
 	omap3xxx_voltagedomains_init();
 	omap3xxx_powerdomains_init();
@@ -459,6 +464,8 @@ void __init ti81xx_init_early(void)
 void __init omap4430_init_early(void)
 {
 	omap2_set_globals_443x();
+	omap4xxx_check_revision();
+	omap4xxx_check_features();
 	omap_common_init_early();
 	omap44xx_voltagedomains_init();
 	omap44xx_powerdomains_init();

arch/arm/plat-omap/include/plat/cpu.h

@@ -451,7 +451,12 @@ IS_OMAP_TYPE(3517, 0x3517)
 #define OMAP447X_CLASS		0x44700044
 #define OMAP4470_REV_ES1_0	(OMAP447X_CLASS | (0x10 << 8))
 
-void omap2_check_revision(void);
+void omap2xxx_check_revision(void);
+void omap3xxx_check_revision(void);
+void omap4xxx_check_revision(void);
+void omap3xxx_check_features(void);
+void ti81xx_check_features(void);
+void omap4xxx_check_features(void);
 
 /*
  * Runtime detection of OMAP3 features