OMAP: mux: Add support for control module split in several partitions
Starting on OMAP4, the pin mux configuration is located in two
different partitions of the control module (CODE_PAD and WKUP_PAD).
The first one is inside the core power domain whereas the second
one is inside the wakeup.
- Add the capability to add any number of partition during board init
time depending of Soc partitioning.
- Add some init flags as well in order to avoid explicit Soc version
check inside the mux core code.
- Add a comment with mux0 mode on top of omap_mux/board/<partition>
if the current mux mode is not the default one.
Thanks to Tony Lindgren <tony@atomide.com> for the following improvements:
- Add omap_mux_get for getting the partition data so platform level
device code can use it.
- Fix the rx51 board code to use the new API.
- Do not store the partition for each mux entry. Look up the partition
for debugfs instead.
Thanks to Dan Murphy <dmurphy@ti.com> for testing on OMAP4 and reporting
a couple of bugs.
Thanks to Anand Gadiyar <gadiyar@ti.com> for testing on OMAP3 zoom and
bug report.
Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Tested-by: Murphy Dan <dmurphy@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Santosh Shilimkar <santosh.shilimkar@ti.com>
Cc: Anand Gadiyar <gadiyar@ti.com>
diff --git a/arch/arm/mach-omap2/mux.h b/arch/arm/mach-omap2/mux.h
index 350c04f..86549be 100644
--- a/arch/arm/mach-omap2/mux.h
+++ b/arch/arm/mach-omap2/mux.h
@@ -1,6 +1,6 @@
/*
* Copyright (C) 2009 Nokia
- * Copyright (C) 2009 Texas Instruments
+ * Copyright (C) 2009-2010 Texas Instruments
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -56,7 +56,7 @@
#define OMAP_MODE_GPIO(x) (((x) & OMAP_MUX_MODE7) == OMAP_MUX_MODE4)
-/* Flags for omap_mux_init */
+/* Flags for omapX_mux_init */
#define OMAP_PACKAGE_MASK 0xffff
#define OMAP_PACKAGE_CBP 6 /* 515-pin 0.40 0.50 */
#define OMAP_PACKAGE_CUS 5 /* 423-pin 0.65 */
@@ -66,14 +66,47 @@
#define OMAP_PACKAGE_ZAF 1 /* 2420 447-pin SIP */
-#define OMAP_MUX_NR_MODES 8 /* Available modes */
-#define OMAP_MUX_NR_SIDES 2 /* Bottom & top */
+#define OMAP_MUX_NR_MODES 8 /* Available modes */
+#define OMAP_MUX_NR_SIDES 2 /* Bottom & top */
+
+/*
+ * omap_mux_init flags definition:
+ *
+ * OMAP_MUX_REG_8BIT: Ensure that access to padconf is done in 8 bits.
+ * The default value is 16 bits.
+ * OMAP_MUX_GPIO_IN_MODE3: The GPIO is selected in mode3.
+ * The default is mode4.
+ */
+#define OMAP_MUX_REG_8BIT (1 << 0)
+#define OMAP_MUX_GPIO_IN_MODE3 (1 << 1)
+
+/**
+ * struct mux_partition - contain partition related information
+ * @name: name of the current partition
+ * @flags: flags specific to this partition
+ * @phys: physical address
+ * @size: partition size
+ * @base: virtual address after ioremap
+ * @muxmodes: list of nodes that belong to a partition
+ * @node: list node for the partitions linked list
+ */
+struct omap_mux_partition {
+ const char *name;
+ u32 flags;
+ u32 phys;
+ u32 size;
+ void __iomem *base;
+ struct list_head muxmodes;
+ struct list_head node;
+};
/**
* struct omap_mux - data for omap mux register offset and it's value
* @reg_offset: mux register offset from the mux base
* @gpio: GPIO number
* @muxnames: available signal modes for a ball
+ * @balls: available balls on the package
+ * @partition: mux partition
*/
struct omap_mux {
u16 reg_offset;
@@ -151,28 +184,39 @@
void omap_mux_set_gpio(u16 val, int gpio);
/**
+ * omap_mux_get() - get a mux partition by name
+ * @name: Name of the mux partition
+ *
+ */
+struct omap_mux_partition *omap_mux_get(const char *name);
+
+/**
* omap_mux_read() - read mux register
+ * @partition: Mux partition
* @mux_offset: Offset of the mux register
*
*/
-u16 omap_mux_read(u16 mux_offset);
+u16 omap_mux_read(struct omap_mux_partition *p, u16 mux_offset);
/**
* omap_mux_write() - write mux register
+ * @partition: Mux partition
* @val: New mux register value
* @mux_offset: Offset of the mux register
*
* This should be only needed for dynamic remuxing of non-gpio signals.
*/
-void omap_mux_write(u16 val, u16 mux_offset);
+void omap_mux_write(struct omap_mux_partition *p, u16 val, u16 mux_offset);
/**
* omap_mux_write_array() - write an array of mux registers
+ * @partition: Mux partition
* @board_mux: Array of mux registers terminated by MAP_MUX_TERMINATOR
*
* This should be only needed for dynamic remuxing of non-gpio signals.
*/
-void omap_mux_write_array(struct omap_board_mux *board_mux);
+void omap_mux_write_array(struct omap_mux_partition *p,
+ struct omap_board_mux *board_mux);
/**
* omap2420_mux_init() - initialize mux system with board specific set
@@ -198,8 +242,10 @@
/**
* omap_mux_init - private mux init function, do not call
*/
-int omap_mux_init(u32 mux_pbase, u32 mux_size,
- struct omap_mux *superset,
- struct omap_mux *package_subset,
- struct omap_board_mux *board_mux,
- struct omap_ball *package_balls);
+int omap_mux_init(const char *name, u32 flags,
+ u32 mux_pbase, u32 mux_size,
+ struct omap_mux *superset,
+ struct omap_mux *package_subset,
+ struct omap_board_mux *board_mux,
+ struct omap_ball *package_balls);
+