diff options
| author | Cyril Chemparathy <cyril@ti.com> | 2010-05-08 01:06:38 +0400 |
|---|---|---|
| committer | Kevin Hilman <khilman@deeprootsystems.com> | 2010-05-13 21:05:29 +0400 |
| commit | 779b0d53ca41873d59225eb776c5d4493a0abd0f (patch) | |
| tree | cf47ab5746105d9116e6c9e33f7ad142ff726d7a /arch/arm/mach-davinci/mux.c | |
| parent | bd808947040ba53b2b0e52dde598a9414fb27bba (diff) | |
| download | linux-779b0d53ca41873d59225eb776c5d4493a0abd0f.tar.xz | |
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>
Diffstat (limited to 'arch/arm/mach-davinci/mux.c')
| -rw-r--r-- | arch/arm/mach-davinci/mux.c | 17 |
1 files changed, 12 insertions, 5 deletions
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); } |