omap: mux: Add new style pin multiplexing code for omap3

Initially only for 34xx. This code allows us to:

- Make the code more generic as the omap internal signal
  names can stay the same across omap generations for some
  devices

- Map mux registers to GPIO registers that is needed for
  dynamic muxing of pins during off-idle

- Override bootloader mux values via kernel cmdline using
  omap_mux=some.signa1=0x1234,some.signal2=0x1234

- View and set the mux registers via debugfs if
  CONFIG_DEBUG_FS is enabled

Cc: Mike Rapoport <mike@compulab.co.il>
Cc: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/arch/arm/plat-omap/mux.c b/arch/arm/plat-omap/mux.c
index 05aebcad215b..06703635ace1 100644
--- a/arch/arm/plat-omap/mux.c
+++ b/arch/arm/plat-omap/mux.c
@@ -54,8 +54,12 @@ int __init_or_module omap_cfg_reg(const unsigned long index)
 {
         struct pin_config *reg;
 
-        if (cpu_is_omap44xx())
-                return 0;
+        if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
+                printk(KERN_ERR "mux: Broken omap_cfg_reg(%lu) entry\n",
+                                index);
+                WARN_ON(1);
+                return -EINVAL;
+        }
 
         if (mux_cfg == NULL) {
                 printk(KERN_ERR "Pin mux table not initialized\n");