diff options
Diffstat (limited to 'arch/arm/mach-omap2/mux.c')
| -rw-r--r-- | arch/arm/mach-omap2/mux.c | 38 |
1 files changed, 20 insertions, 18 deletions
diff --git a/arch/arm/mach-omap2/mux.c b/arch/arm/mach-omap2/mux.c index be52fabf6dc0..ab403b2ed26b 100644 --- a/arch/arm/mach-omap2/mux.c +++ b/arch/arm/mach-omap2/mux.c @@ -87,6 +87,9 @@ static char *omap_mux_options; int __init omap_mux_init_gpio(int gpio, int val) { struct omap_mux_entry *e; + struct omap_mux *gpio_mux; + u16 old_mode; + u16 mux_mode; int found = 0; if (!gpio) @@ -95,34 +98,33 @@ int __init omap_mux_init_gpio(int gpio, int val) list_for_each_entry(e, &muxmodes, node) { struct omap_mux *m = &e->mux; if (gpio == m->gpio) { - u16 old_mode; - u16 mux_mode; - - old_mode = omap_mux_read(m->reg_offset); - mux_mode = val & ~(OMAP_MUX_NR_MODES - 1); - if (omap_mux_flags & MUXABLE_GPIO_MODE3) - mux_mode |= OMAP_MUX_MODE3; - else - mux_mode |= OMAP_MUX_MODE4; - printk(KERN_DEBUG "mux: Setting signal " - "%s.gpio%i 0x%04x -> 0x%04x\n", - m->muxnames[0], gpio, old_mode, mux_mode); - omap_mux_write(mux_mode, m->reg_offset); + gpio_mux = m; found++; } } - if (found == 1) - return 0; + if (found == 0) { + printk(KERN_ERR "mux: Could not set gpio%i\n", gpio); + return -ENODEV; + } if (found > 1) { - printk(KERN_ERR "mux: Multiple gpio paths for gpio%i\n", gpio); + printk(KERN_INFO "mux: Multiple gpio paths (%d) for gpio%i\n", + found, gpio); return -EINVAL; } - printk(KERN_ERR "mux: Could not set gpio%i\n", gpio); + old_mode = omap_mux_read(gpio_mux->reg_offset); + mux_mode = val & ~(OMAP_MUX_NR_MODES - 1); + if (omap_mux_flags & MUXABLE_GPIO_MODE3) + mux_mode |= OMAP_MUX_MODE3; + else + mux_mode |= OMAP_MUX_MODE4; + printk(KERN_DEBUG "mux: Setting signal %s.gpio%i 0x%04x -> 0x%04x\n", + gpio_mux->muxnames[0], gpio, old_mode, mux_mode); + omap_mux_write(mux_mode, gpio_mux->reg_offset); - return -ENODEV; + return 0; } int __init omap_mux_init_signal(char *muxname, int val) |