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@xxxxxxxxxxx>
---
arch/arm/mach-omap2/mux.c | 67 ++++++++++++++++++++++++++
arch/arm/mach-omap2/mux.h | 24 +++++++++
arch/arm/plat-omap/include/plat/omap_hwmod.h | 32 ++++++++++++
3 files changed, 123 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-omap2/mux.c b/arch/arm/mach-omap2/mux.c
index 0fa3d74..4008814 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"
@@ -49,6 +51,8 @@ struct omap_mux_entry {
static LIST_HEAD(mux_partitions);
static DEFINE_MUTEX(muxmode_mutex);
+static struct omap_mux_partition *omap_mux_get_partition(struct omap_mux *mux);
+
struct omap_mux_partition *omap_mux_get(const char *name)
{
struct omap_mux_partition *partition;
@@ -252,6 +256,69 @@ 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
diff --git a/arch/arm/mach-omap2/mux.h b/arch/arm/mach-omap2/mux.h
index 79076d6..8c78bed 100644
--- a/arch/arm/mach-omap2/mux.h
+++ b/arch/arm/mach-omap2/mux.h
@@ -145,6 +145,30 @@ struct omap_board_mux {
u16 value;
};
+#define OMAP_DEVICE_PAD_ENABLED BIT(7) /* Should not be needed in board-*.c files */
+#define OMAP_DEVICE_PAD_REMUX BIT(1) /* Dynamically remux a pad, needs enable, idle and off */
+#define OMAP_DEVICE_PAD_WAKEUP BIT(0) /* Flag a pad as wake-up capable */
+
+/**
+ * struct omap_device_pad - device specific pad configuration
+ * @name: signal name
+ * @flags: pad specific runtime flags
+ * @enable: runtime value for a pad
+ * @idle: idle value for a pad
+ * @off: off value for a pad, defaults to safe mode
+ * @partition: mux partition
+ * @mux: mux register
+ */
+struct omap_device_pad {
+ char *name;
+ u8 flags;
+ u16 enable;
+ u16 idle;
+ u16 off;
+ struct omap_mux_partition *partition;
+ struct omap_mux *mux;
+};
+
#if defined(CONFIG_OMAP_MUX)
/**
diff --git a/arch/arm/plat-omap/include/plat/omap_hwmod.h b/arch/arm/plat-omap/include/plat/omap_hwmod.h
index 7eaa8ed..7616007 100644
--- a/arch/arm/plat-omap/include/plat/omap_hwmod.h
+++ b/arch/arm/plat-omap/include/plat/omap_hwmod.h
@@ -78,6 +78,18 @@ extern struct omap_hwmod_sysc_fields omap_hwmod_sysc_type2;
#define HWMOD_IDLEMODE_SMART (1 << 2)
/**
+ * struct omap_hwmod_mux_info - hwmod specific mux configuration
+ * @pads: array of omap_device_pad entries
+ * @nr_pads: number of omap_device_pad entries
+ *
+ * Note that this is currently built during init as needed.
+ */
+struct omap_hwmod_mux_info {
+ int nr_pads;
+ struct omap_device_pad *pads;
+};
+
+/**
* struct omap_hwmod_irq_info - MPU IRQs used by the hwmod
* @name: name of the IRQ channel (module local name)
* @irq_ch: IRQ channel ID
@@ -469,6 +481,7 @@ struct omap_hwmod {
const char *name;
struct omap_hwmod_class *class;
struct omap_device *od;
+ struct omap_hwmod_mux_info *mux;
struct omap_hwmod_irq_info *mpu_irqs;
struct omap_hwmod_dma_info *sdma_reqs;
struct omap_hwmod_rst_info *rst_lines;
@@ -504,6 +517,25 @@ struct omap_hwmod {
};
int omap_hwmod_init(struct omap_hwmod **ohs);
+
+/**
+ * omap_hwmod_mux_init - initialize hwmod specific mux data
+ * @bpads: Board specific device signal names
+ * @nr_pads: Number of signal names for the device
+ *
+ * Called only from omap_device_build, do not use.
+ */
+#ifdef CONFIG_OMAP_MUX
+extern struct omap_hwmod_mux_info *
+omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads);
+#else
+static inline omap_hwmod_mux_info *
+omap_hwmod_mux_init(struct omap_device_pad *bpads, int nr_pads)
+{
+ return NULL;
+}
+#endif
+
int omap_hwmod_register(struct omap_hwmod *oh);
int omap_hwmod_unregister(struct omap_hwmod *oh);
struct omap_hwmod *omap_hwmod_lookup(const char *name);
--
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