ab8500-charger: Add backup battery charge voltages on the ab8540

Add 2.7v, 2.9v, 3.0v, 3.2v and 3.3v charging voltages for backup
battery. Before that only 2.5v, 2.6v, 2.8v, 3.1v were available.

Signed-off-by: Yang QU <yang.qu@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Maxime COQUELIN <maxime.coquelin@stericsson.com>
Reviewed-by: Marcus COOPER <marcus.xm.cooper@stericsson.com>
Tested-by: Xiao Mei ZHANG <xiaomei.zhang@stericsson.com>

1 files changed, 20 insertions, 4 deletions

diff --git a/include/linux/mfd/abx500/ab8500-bm.h b/include/linux/mfd/abx500/ab8500-bm.h
index 0efbe0efee7f..a73e05a0441b 100644
--- a/include/linux/mfd/abx500/ab8500-bm.h
+++ b/include/linux/mfd/abx500/ab8500-bm.h
@@ -105,6 +105,7 @@
 #define AB8500_RTC_BACKUP_CHG_REG       0x0C
 #define AB8500_RTC_CC_CONF_REG          0x01
 #define AB8500_RTC_CTRL_REG             0x0B
+#define AB8500_RTC_CTRL1_REG            0x11
 
 /*
  * OTP register offsets
@@ -179,10 +180,25 @@
 #define BUP_ICH_SEL_300UA               0x08
 #define BUP_ICH_SEL_700UA               0x0C
 
-#define BUP_VCH_SEL_2P5V                0x00
-#define BUP_VCH_SEL_2P6V                0x01
-#define BUP_VCH_SEL_2P8V                0x02
-#define BUP_VCH_SEL_3P1V                0x03
+enum bup_vch_sel {
+        BUP_VCH_SEL_2P5V,
+        BUP_VCH_SEL_2P6V,
+        BUP_VCH_SEL_2P8V,
+        BUP_VCH_SEL_3P1V,
+        /*
+         * Note that the following 5 values 2.7v, 2.9v, 3.0v, 3.2v, 3.3v
+         * are only available on ab8540. You can't choose these 5
+         * voltage on ab8500/ab8505/ab9540.
+         */
+        BUP_VCH_SEL_2P7V,
+        BUP_VCH_SEL_2P9V,
+        BUP_VCH_SEL_3P0V,
+        BUP_VCH_SEL_3P2V,
+        BUP_VCH_SEL_3P3V,
+};
+
+#define BUP_VCH_RANGE           0x02
+#define VBUP33_VRTCN            0x01
 
 /* Battery OVV constants */
 #define BATT_OVV_ENA                    0x02