regulator: AB3100 support

This adds support for the regulators found in the AB3100
Mixed-Signal IC.

It further also defines platform data for the ST-Ericsson
U300 platform and extends the AB3100 MFD driver so that
platform/board data with regulation constraints and an init
function can be passed down all the way from the board to
the regulators.

Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/include/linux/mfd/ab3100.h b/include/linux/mfd/ab3100.h
index 3ead5cfb638c..e9aa4c9d749d 100644
--- a/include/linux/mfd/ab3100.h
+++ b/include/linux/mfd/ab3100.h
@@ -7,6 +7,7 @@
 
 #include <linux/device.h>
 #include <linux/workqueue.h>
+#include <linux/regulator/machine.h>
 
 #ifndef MFD_AB3100_H
 #define MFD_AB3100_H
@@ -57,6 +58,14 @@
 #define AB3100_STR_BATT_REMOVAL                         (0x40)
 #define AB3100_STR_VBUS                                 (0x80)
 
+/*
+ * AB3100 contains 8 regulators, one external regulator controller
+ * and a buck converter, further the LDO E and buck converter can
+ * have separate settings if they are in sleep mode, this is
+ * modeled as a separate regulator.
+ */
+#define AB3100_NUM_REGULATORS                           10
+
 /**
  * struct ab3100
  * @access_mutex: lock out concurrent accesses to the AB3100 registers
@@ -87,6 +96,25 @@ struct ab3100 {
         bool startup_events_read;
 };
 
+/**
+ * struct ab3100_platform_data
+ * Data supplied to initialize board connections to the AB3100
+ * @reg_constraints: regulator constraints for target board
+ *     the order of these constraints are: LDO A, C, D, E,
+ *     F, G, H, K, EXT and BUCK.
+ * @reg_initvals: initial values for the regulator registers
+ *     plus two sleep settings for LDO E and the BUCK converter.
+ *     exactly AB3100_NUM_REGULATORS+2 values must be sent in.
+ *     Order: LDO A, C, E, E sleep, F, G, H, K, EXT, BUCK,
+ *     BUCK sleep, LDO D. (LDO D need to be initialized last.)
+ * @external_voltage: voltage level of the external regulator.
+ */
+struct ab3100_platform_data {
+        struct regulator_init_data reg_constraints[AB3100_NUM_REGULATORS];
+        u8 reg_initvals[AB3100_NUM_REGULATORS+2];
+        int external_voltage;
+};
+
 int ab3100_set_register_interruptible(struct ab3100 *ab3100, u8 reg, u8 regval);
 int ab3100_get_register_interruptible(struct ab3100 *ab3100, u8 reg, u8 *regval);
 int ab3100_get_register_page_interruptible(struct ab3100 *ab3100,