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Davinci: pinmux - use ioremap()

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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>
This commit is contained in:
Cyril Chemparathy
2010-05-07 17:06:38 -04:00
committed by Kevin Hilman
parent bd80894704
commit 779b0d53ca
8 changed files with 19 additions and 14 deletions
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17
arch/arm/mach-davinci/mux.c
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@@ -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);
}