[PATCH 1/8] omap2: mux: intoduce omap_mux_{read,write}

Tony Lindgren
2009-11-26T00:18:47Z

From: Mike Rapoport <mike@compulab.co.il>

intoduce omap_mux_{read,write}

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
arch/arm/mach-omap2/mux.c | 44 ++++++++++++++++++++++++++++++++++++++------
1 files changed, 38 insertions(+), 6 deletions(-)

diff --git a/arch/arm/mach-omap2/mux.c b/arch/arm/mach-omap2/mux.c
index c18a94e..64250c5 100644
--- a/arch/arm/mach-omap2/mux.c
+++ b/arch/arm/mach-omap2/mux.c
@@ -35,7 +35,27 @@

#ifdef CONFIG_OMAP_MUX

+#define OMAP_MUX_BASE_OFFSET 0x30 /* Offset from CTRL_BASE */
+#define OMAP_MUX_BASE_SZ 0x5ca
+
static struct omap_mux_cfg arch_mux_cfg;
+static void __iomem *mux_base;
+
+static inline u16 omap_mux_read(u16 reg)
+{
+ if (cpu_is_omap24xx())
+ return __raw_readb(mux_base + reg);
+ else
+ return __raw_readw(mux_base + reg);
+}
+
+static inline void omap_mux_write(u16 val, u16 reg)
+{
+ if (cpu_is_omap24xx())
+ __raw_writeb(val, mux_base + reg);
+ else
+ __raw_writew(val, mux_base + reg);
+}

/* NOTE: See mux.h for the enumeration */

@@ -581,10 +601,7 @@ static void __init_or_module omap2_cfg_debug(const struct pin_config *cfg, u16 r
u16 orig;
u8 warn = 0, debug = 0;

- if (cpu_is_omap24xx())
- orig = omap_ctrl_readb(cfg->mux_reg);
- else
- orig = omap_ctrl_readw(cfg->mux_reg);
+ orig = omap_mux_read(cfg->mux_reg - OMAP_MUX_BASE_OFFSET);

#ifdef CONFIG_OMAP_MUX_DEBUG
debug = cfg->debug;
@@ -614,7 +631,7 @@ static int __init_or_module omap24xx_cfg_reg(const struct pin_config *cfg)
if (cfg->pu_pd_val)
reg |= OMAP2_PULL_UP;
omap2_cfg_debug(cfg, reg);
- omap_ctrl_writeb(reg, cfg->mux_reg);
+ omap_mux_write(reg, cfg->mux_reg - OMAP_MUX_BASE_OFFSET);
spin_unlock_irqrestore(&mux_spin_lock, flags);

return 0;
@@ -633,7 +650,7 @@ static int __init_or_module omap34xx_cfg_reg(const struct pin_config *cfg)
spin_lock_irqsave(&mux_spin_lock, flags);
reg |= cfg->mux_val;
omap2_cfg_debug(cfg, reg);
- omap_ctrl_writew(reg, cfg->mux_reg);
+ omap_mux_write(reg, cfg->mux_reg - OMAP_MUX_BASE_OFFSET);
spin_unlock_irqrestore(&mux_spin_lock, flags);

return 0;
@@ -644,6 +661,21 @@ static int __init_or_module omap34xx_cfg_reg(const struct pin_config *cfg)

int __init omap2_mux_init(void)
{
+ u32 mux_pbase;
+
+ if (cpu_is_omap2420())
+ mux_pbase = OMAP2420_CTRL_BASE + OMAP_MUX_BASE_OFFSET;
+ else if (cpu_is_omap2430())
+ mux_pbase = OMAP243X_CTRL_BASE + OMAP_MUX_BASE_OFFSET;
+ else if (cpu_is_omap34xx())
+ mux_pbase = OMAP343X_CTRL_BASE + OMAP_MUX_BASE_OFFSET;
+
+ mux_base = ioremap(mux_pbase, OMAP_MUX_BASE_SZ);
+ if (!mux_base) {
+ printk(KERN_ERR "mux: Could not ioremap\n");
+ return -ENODEV;
+ }
+
if (cpu_is_omap24xx()) {
arch_mux_cfg.pins = omap24xx_pins;
arch_mux_cfg.size = OMAP24XX_PINS_SZ;