Davinci: pinmux - use ioremap()

This patch modifies the pinmux implementation so as to ioremap() the pinmux
register area on first use.

Signed-off-by: Cyril Chemparathy <cyril@ti.com>
Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>

8 files changed, 19 insertions, 14 deletions

diff --git a/arch/arm/mach-davinci/da830.c b/arch/arm/mach-davinci/da830.c
index 2c84f070208..94fe971f276 100644
--- a/arch/arm/mach-davinci/da830.c
+++ b/arch/arm/mach-davinci/da830.c
@@ -1191,6 +1191,7 @@ static struct davinci_soc_info davinci_soc_info_da830 = {
 	.cpu_clks		= da830_clks,
 	.psc_bases		= da830_psc_bases,
 	.psc_bases_num		= ARRAY_SIZE(da830_psc_bases),
+	.pinmux_base		= DA8XX_SYSCFG0_BASE + 0x120,
 	.pinmux_pins		= da830_pins,
 	.pinmux_pins_num	= ARRAY_SIZE(da830_pins),
 	.intc_base		= DA8XX_CP_INTC_BASE,
@@ -1213,7 +1214,5 @@ void __init da830_init(void)
 	if (WARN(!da8xx_syscfg0_base, "Unable to map syscfg0 module"))
 		return;
 
-	davinci_soc_info_da830.pinmux_base = DA8XX_SYSCFG0_VIRT(0x120);
-
 	davinci_common_init(&davinci_soc_info_da830);
 }
diff --git a/arch/arm/mach-davinci/da850.c b/arch/arm/mach-davinci/da850.c
index 6f5ea2aa1c4..74d4e49d406 100644
--- a/arch/arm/mach-davinci/da850.c
+++ b/arch/arm/mach-davinci/da850.c
@@ -1076,6 +1076,7 @@ static struct davinci_soc_info davinci_soc_info_da850 = {
 	.cpu_clks		= da850_clks,
 	.psc_bases		= da850_psc_bases,
 	.psc_bases_num		= ARRAY_SIZE(da850_psc_bases),
+	.pinmux_base		= DA8XX_SYSCFG0_BASE + 0x120,
 	.pinmux_pins		= da850_pins,
 	.pinmux_pins_num	= ARRAY_SIZE(da850_pins),
 	.intc_base		= DA8XX_CP_INTC_BASE,
@@ -1106,8 +1107,6 @@ void __init da850_init(void)
 	if (WARN(!da8xx_syscfg1_base, "Unable to map syscfg1 module"))
 		return;
 
-	davinci_soc_info_da850.pinmux_base = DA8XX_SYSCFG0_VIRT(0x120);
-
 	davinci_common_init(&davinci_soc_info_da850);
 
 	/*
diff --git a/arch/arm/mach-davinci/dm355.c b/arch/arm/mach-davinci/dm355.c
index 5ab39f6360f..383478116ef 100644
--- a/arch/arm/mach-davinci/dm355.c
+++ b/arch/arm/mach-davinci/dm355.c
@@ -844,7 +844,7 @@ static struct davinci_soc_info davinci_soc_info_dm355 = {
 	.cpu_clks		= dm355_clks,
 	.psc_bases		= dm355_psc_bases,
 	.psc_bases_num		= ARRAY_SIZE(dm355_psc_bases),
-	.pinmux_base		= IO_ADDRESS(DAVINCI_SYSTEM_MODULE_BASE),
+	.pinmux_base		= DAVINCI_SYSTEM_MODULE_BASE,
 	.pinmux_pins		= dm355_pins,
 	.pinmux_pins_num	= ARRAY_SIZE(dm355_pins),
 	.intc_base		= DAVINCI_ARM_INTC_BASE,
diff --git a/arch/arm/mach-davinci/dm365.c b/arch/arm/mach-davinci/dm365.c
index be340ed1b70..e5e3dce4cfb 100644
--- a/arch/arm/mach-davinci/dm365.c
+++ b/arch/arm/mach-davinci/dm365.c
@@ -1049,7 +1049,7 @@ static struct davinci_soc_info davinci_soc_info_dm365 = {
 	.cpu_clks		= dm365_clks,
 	.psc_bases		= dm365_psc_bases,
 	.psc_bases_num		= ARRAY_SIZE(dm365_psc_bases),
-	.pinmux_base		= IO_ADDRESS(DAVINCI_SYSTEM_MODULE_BASE),
+	.pinmux_base		= DAVINCI_SYSTEM_MODULE_BASE,
 	.pinmux_pins		= dm365_pins,
 	.pinmux_pins_num	= ARRAY_SIZE(dm365_pins),
 	.intc_base		= DAVINCI_ARM_INTC_BASE,
diff --git a/arch/arm/mach-davinci/dm644x.c b/arch/arm/mach-davinci/dm644x.c
index d3aa1f7d0ab..7ad15208b84 100644
--- a/arch/arm/mach-davinci/dm644x.c
+++ b/arch/arm/mach-davinci/dm644x.c
@@ -735,7 +735,7 @@ static struct davinci_soc_info davinci_soc_info_dm644x = {
 	.cpu_clks		= dm644x_clks,
 	.psc_bases		= dm644x_psc_bases,
 	.psc_bases_num		= ARRAY_SIZE(dm644x_psc_bases),
-	.pinmux_base		= IO_ADDRESS(DAVINCI_SYSTEM_MODULE_BASE),
+	.pinmux_base		= DAVINCI_SYSTEM_MODULE_BASE,
 	.pinmux_pins		= dm644x_pins,
 	.pinmux_pins_num	= ARRAY_SIZE(dm644x_pins),
 	.intc_base		= DAVINCI_ARM_INTC_BASE,
diff --git a/arch/arm/mach-davinci/dm646x.c b/arch/arm/mach-davinci/dm646x.c
index e0153b30f44..94045656cff 100644
--- a/arch/arm/mach-davinci/dm646x.c
+++ b/arch/arm/mach-davinci/dm646x.c
@@ -819,7 +819,7 @@ static struct davinci_soc_info davinci_soc_info_dm646x = {
 	.cpu_clks		= dm646x_clks,
 	.psc_bases		= dm646x_psc_bases,
 	.psc_bases_num		= ARRAY_SIZE(dm646x_psc_bases),
-	.pinmux_base		= IO_ADDRESS(DAVINCI_SYSTEM_MODULE_BASE),
+	.pinmux_base		= DAVINCI_SYSTEM_MODULE_BASE,
 	.pinmux_pins		= dm646x_pins,
 	.pinmux_pins_num	= ARRAY_SIZE(dm646x_pins),
 	.intc_base		= DAVINCI_ARM_INTC_BASE,
diff --git a/arch/arm/mach-davinci/include/mach/common.h b/arch/arm/mach-davinci/include/mach/common.h
index 005f6242e0b..2e072482c11 100644
--- a/arch/arm/mach-davinci/include/mach/common.h
+++ b/arch/arm/mach-davinci/include/mach/common.h
@@ -51,7 +51,7 @@ struct davinci_soc_info {
 	struct clk_lookup		*cpu_clks;
 	u32				*psc_bases;
 	unsigned long			psc_bases_num;
-	void __iomem			*pinmux_base;
+	u32				pinmux_base;
 	const struct mux_config		*pinmux_pins;
 	unsigned long			pinmux_pins_num;
 	u32				intc_base;
diff --git a/arch/arm/mach-davinci/mux.c b/arch/arm/mach-davinci/mux.c
index e9d530a8f79..f34a8dcdae2 100644
--- a/arch/arm/mach-davinci/mux.c
+++ b/arch/arm/mach-davinci/mux.c
@@ -22,6 +22,8 @@
 #include <mach/mux.h>
 #include <mach/common.h>
 
+static void __iomem *pinmux_base;
+
 /*
  * Sets the DAVINCI MUX register based on the table
  */
@@ -29,14 +31,19 @@ int __init_or_module davinci_cfg_reg(const unsigned long index)
 {
 	static DEFINE_SPINLOCK(mux_spin_lock);
 	struct davinci_soc_info *soc_info = &davinci_soc_info;
-	void __iomem *base = soc_info->pinmux_base;
 	unsigned long flags;
 	const struct mux_config *cfg;
 	unsigned int reg_orig = 0, reg = 0;
 	unsigned int mask, warn = 0;
 
-	if (!soc_info->pinmux_pins)
-		BUG();
+	if (WARN_ON(!soc_info->pinmux_pins))
+		return -ENODEV;
+
+	if (!pinmux_base) {
+		pinmux_base = ioremap(soc_info->pinmux_base, SZ_4K);
+		if (WARN_ON(!pinmux_base))
+			return -ENOMEM;
+	}
 
 	if (index >= soc_info->pinmux_pins_num) {
 		printk(KERN_ERR "Invalid pin mux index: %lu (%lu)\n",
@@ -57,7 +64,7 @@ int __init_or_module davinci_cfg_reg(const unsigned long index)
 		unsigned	tmp1, tmp2;
 
 		spin_lock_irqsave(&mux_spin_lock, flags);
-		reg_orig = __raw_readl(base + cfg->mux_reg);
+		reg_orig = __raw_readl(pinmux_base + cfg->mux_reg);
 
 		mask = (cfg->mask << cfg->mask_offset);
 		tmp1 = reg_orig & mask;
@@ -69,7 +76,7 @@ int __init_or_module davinci_cfg_reg(const unsigned long index)
 		if (tmp1 != tmp2)
 			warn = 1;
 
-		__raw_writel(reg, base + cfg->mux_reg);
+		__raw_writel(reg, pinmux_base + cfg->mux_reg);
 		spin_unlock_irqrestore(&mux_spin_lock, flags);
 	}