---

yaml --- r: 319243 b: refs/heads/master c: d49679e h: refs/heads/master i: 319241: 2eff08e 319239: 2182622 v: v3
git-mirror · Jun 20, 2012 · fb92ffd · fb92ffd
1 parent 6e03508
commit fb92ffd
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Showing 4 changed files with 21 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: e2dcd461a7ba0c3deb44336136ea784c8b972292
+refs/heads/master: d49679e5928709bce8937dce396458b139c4b34d
diff --git a/trunk/arch/arm/mach-shmobile/board-armadillo800eva.c b/trunk/arch/arm/mach-shmobile/board-armadillo800eva.c
@@ -587,6 +587,7 @@ static void __init eva_init(void)
 	eva_clock_init();
 
 	r8a7740_pinmux_init();
+	r8a7740_meram_workaround();
 
 	/* SCIFA1 */
 	gpio_request(GPIO_FN_SCIFA1_RXD, NULL);

diff --git a/trunk/arch/arm/mach-shmobile/include/mach/common.h b/trunk/arch/arm/mach-shmobile/include/mach/common.h
@@ -77,6 +77,7 @@ extern void r8a7779_add_standard_devices(void);
 extern void r8a7779_clock_init(void);
 extern void r8a7779_pinmux_init(void);
 extern void r8a7779_pm_init(void);
+extern void r8a7740_meram_workaround(void);
 
 extern unsigned int r8a7779_get_core_count(void);
 extern int r8a7779_platform_cpu_kill(unsigned int cpu);

diff --git a/trunk/arch/arm/mach-shmobile/setup-r8a7740.c b/trunk/arch/arm/mach-shmobile/setup-r8a7740.c
@@ -324,6 +324,24 @@ static struct platform_device *r8a7740_late_devices[] __initdata = {
 	&i2c1_device,
 };
 
+/*
+ * r8a7740 chip has lasting errata on MERAM buffer.
+ * this is work-around for it.
+ * see
+ *	"Media RAM (MERAM)" on r8a7740 documentation
+ */
+#define MEBUFCNTR	0xFE950098
+void r8a7740_meram_workaround(void)
+{
+	void __iomem *reg;
+
+	reg = ioremap_nocache(MEBUFCNTR, 4);
+	if (reg) {
+		iowrite32(0x01600164, reg);
+		iounmap(reg);
+	}
+}
+
 #define ICCR	0x0004
 #define ICSTART	0x0070