omap2+: Add support for hwmod specific muxing of devices

This allows adding hwmod specific pads dynamically during the
platform device init.

Note that we don't currently have the hwmod specific signals
listed in the hwmod data, but struct omap_hwmod_mux_info will
make that possible if necessary.

Signed-off-by: Tony Lindgren <tony@atomide.com>

1 files changed, 65 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/mux.c b/arch/arm/mach-omap2/mux.c
index 0fa3d74125b..27eb51a224c 100644
--- a/arch/arm/mach-omap2/mux.c
+++ b/arch/arm/mach-omap2/mux.c
@@ -35,6 +35,8 @@
 
 #include <asm/system.h>
 
+#include <plat/omap_hwmod.h>
+
 #include "control.h"
 #include "mux.h"
 
@@ -252,6 +254,69 @@ int __init omap_mux_init_signal(const char *muxname, int val)
         return 0;
 }
 
+struct omap_hwmod_mux_info * __init
+omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads)
+{
+        struct omap_hwmod_mux_info *hmux;
+        int i;
+
+        if (!bpads || nr_pads < 1)
+                return NULL;
+
+        hmux = kzalloc(sizeof(struct omap_hwmod_mux_info), GFP_KERNEL);
+        if (!hmux)
+                goto err1;
+
+        hmux->nr_pads = nr_pads;
+
+        hmux->pads = kzalloc(sizeof(struct omap_device_pad) *
+                                nr_pads, GFP_KERNEL);
+        if (!hmux->pads)
+                goto err2;
+
+        for (i = 0; i < hmux->nr_pads; i++) {
+                struct omap_mux_partition *partition;
+                struct omap_device_pad *bpad = &bpads[i], *pad = &hmux->pads[i];
+                struct omap_mux *mux;
+                int mux_mode;
+
+                mux_mode = omap_mux_get_by_name(bpad->name, &partition, &mux);
+                if (mux_mode < 0)
+                        goto err3;
+                if (!pad->partition)
+                        pad->partition = partition;
+                if (!pad->mux)
+                        pad->mux = mux;
+
+                pad->name = kzalloc(strlen(bpad->name) + 1, GFP_KERNEL);
+                if (!pad->name) {
+                        int j;
+
+                        for (j = i - 1; j >= 0; j--)
+                                kfree(hmux->pads[j].name);
+                        goto err3;
+                }
+                strcpy(pad->name, bpad->name);
+
+                pad->flags = bpad->flags;
+                pad->enable = bpad->enable;
+                pad->idle = bpad->idle;
+                pad->off = bpad->off;
+                pr_debug("%s: Initialized %s\n", __func__, pad->name);
+        }
+
+        return hmux;
+
+err3:
+        kfree(hmux->pads);
+err2:
+        kfree(hmux);
+err1:
+        pr_err("%s: Could not allocate device mux entry\n", __func__);
+
+        return NULL;
+}
+
 #ifdef CONFIG_DEBUG_FS
 
 #define OMAP_MUX_MAX_NR_FLAGS   10