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 2c84f0702088..94fe971f276a 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 6f5ea2aa1c4a..74d4e49d4064 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 5ab39f6360f9..383478116ef5 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 be340ed1b707..e5e3dce4cfba 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 d3aa1f7d0ab8..7ad15208b841 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 e0153b30f446..94045656cff6 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 005f6242e0ba..2e072482c119 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 e9d530a8f79f..f34a8dcdae2b 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);
         }