linux-kernel - [PATCH v2 07/14] ARM: OMAP2+: AM43x: early init

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Message-ID: <82f3b2b672a45b971fd0bb34366a6af368015db0.1369658705.git.afzal@ti.com>
Date:	Mon, 27 May 2013 20:06:23 +0530
From:	Afzal Mohammed <afzal@...com>
To:	<linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<devicetree-discuss@...ts.ozlabs.org>, <linux-doc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
CC:	Tony Lindgren <tony@...mide.com>,
	Russell King <linux@....linux.org.uk>,
	Benoit Cousson <benoit.cousson@...aro.org>,
	Grant Likely <grant.likely@...aro.org>,
	Rob Herring <rob.herring@...xeda.com>,
	Rob Landley <rob@...dley.net>
Subject: [PATCH v2 07/14] ARM: OMAP2+: AM43x: early init

Minimal early init - PRCM initialization not yet taken care.

Control module is similar (base address, feature register etc.) as
that of AM335x, while PRCM base address is different. Instead of
adding a new header file for AM43x, PRCM base address is added in
AM335x header file as it is similar to it to a large extent.

Signed-off-by: Afzal Mohammed <afzal@...com>
---
 arch/arm/mach-omap2/am33xx.h |  1 +
 arch/arm/mach-omap2/common.h |  1 +
 arch/arm/mach-omap2/io.c     | 14 ++++++++++++++
 3 files changed, 16 insertions(+)

diff --git a/arch/arm/mach-omap2/am33xx.h b/arch/arm/mach-omap2/am33xx.h
index 43296c1..5eef093 100644
--- a/arch/arm/mach-omap2/am33xx.h
+++ b/arch/arm/mach-omap2/am33xx.h
@@ -21,6 +21,7 @@
 #define AM33XX_SCM_BASE		0x44E10000
 #define AM33XX_CTRL_BASE	AM33XX_SCM_BASE
 #define AM33XX_PRCM_BASE	0x44E00000
+#define AM43XX_PRCM_BASE	0x44DF0000
 #define AM33XX_TAP_BASE		(AM33XX_CTRL_BASE + 0x3FC)
 
 #endif /* __ASM_ARCH_AM33XX_H */
diff --git a/arch/arm/mach-omap2/common.h b/arch/arm/mach-omap2/common.h
index d555cf2..00f890e 100644
--- a/arch/arm/mach-omap2/common.h
+++ b/arch/arm/mach-omap2/common.h
@@ -96,6 +96,7 @@ void am33xx_init_early(void);
 void am35xx_init_early(void);
 void ti81xx_init_early(void);
 void am33xx_init_early(void);
+void am43xx_init_early(void);
 void omap4430_init_early(void);
 void omap5_init_early(void);
 void omap3_init_late(void);	/* Do not use this one */
diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c
index 3a81221..f933f7f 100644
--- a/arch/arm/mach-omap2/io.c
+++ b/arch/arm/mach-omap2/io.c
@@ -586,6 +586,20 @@ void __init am33xx_init_early(void)
 }
 #endif
 
+#ifdef CONFIG_SOC_AM43XX
+void __init am43xx_init_early(void)
+{
+	omap2_set_globals_tap(AM335X_CLASS,
+			      AM33XX_L4_WK_IO_ADDRESS(AM33XX_TAP_BASE));
+	omap2_set_globals_control(AM33XX_L4_WK_IO_ADDRESS(AM33XX_CTRL_BASE),
+				  NULL);
+	omap2_set_globals_prm(AM33XX_L4_WK_IO_ADDRESS(AM43XX_PRCM_BASE));
+	omap2_set_globals_cm(AM33XX_L4_WK_IO_ADDRESS(AM43XX_PRCM_BASE), NULL);
+	omap3xxx_check_revision();
+	am33xx_check_features();
+}
+#endif
+
 #ifdef CONFIG_ARCH_OMAP4
 void __init omap4430_init_early(void)
 {
-- 
1.7.12

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