1 files changed, 55 insertions, 0 deletions

diff --git a/extras/recipes-kernel/linux/linux-omap-2.6.39/sakoman/0016-RTC-add-support-for-backup-battery-recharge.patch b/extras/recipes-kernel/linux/linux-omap-2.6.39/sakoman/0016-RTC-add-support-for-backup-battery-recharge.patch
new file mode 100644
index 00000000..cb685cc2
--- /dev/null
+++ b/extras/recipes-kernel/linux/linux-omap-2.6.39/sakoman/0016-RTC-add-support-for-backup-battery-recharge.patch
@@ -0,0 +1,55 @@
+From 6f432e1e39f276a41d600d1cc9cd17fc088877d8 Mon Sep 17 00:00:00 2001
+From: Steve Sakoman <steve@sakoman.com>
+Date: Thu, 4 Feb 2010 12:26:22 -0800
+Subject: [PATCH 16/32] RTC: add support for backup battery recharge
+
+---
+ drivers/rtc/rtc-twl.c |   25 +++++++++++++++++++++++++
+ 1 files changed, 25 insertions(+), 0 deletions(-)
+
+diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c
+index f9a2799..713b8ea 100644
+--- a/drivers/rtc/rtc-twl.c
++++ b/drivers/rtc/rtc-twl.c
+@@ -30,6 +30,23 @@
+ 
+ #include <linux/i2c/twl.h>
+ 
++/*
++ * PM_RECEIVER block register offsets (use TWL4030_MODULE_PM_RECEIVER)
++ */
++#define REG_BB_CFG     0x12
++
++/* PM_RECEIVER  BB_CFG bitfields */
++#define BIT_PM_RECEIVER_BB_CFG_BBCHEN           0x10
++#define BIT_PM_RECEIVER_BB_CFG_BBSEL            0x0C
++#define BIT_PM_RECEIVER_BB_CFG_BBSEL_2V5        0x00
++#define BIT_PM_RECEIVER_BB_CFG_BBSEL_3V0        0x04
++#define BIT_PM_RECEIVER_BB_CFG_BBSEL_3V1        0x08
++#define BIT_PM_RECEIVER_BB_CFG_BBSEL_3v2        0x0c
++#define BIT_PM_RECEIVER_BB_CFG_BBISEL           0x03
++#define BIT_PM_RECEIVER_BB_CFG_BBISEL_25UA      0x00
++#define BIT_PM_RECEIVER_BB_CFG_BBISEL_150UA     0x01
++#define BIT_PM_RECEIVER_BB_CFG_BBISEL_500UA     0x02
++#define BIT_PM_RECEIVER_BB_CFG_BBISEL_1MA       0x03
+ 
+ /*
+  * RTC block register offsets (use TWL_MODULE_RTC)
+@@ -495,6 +512,14 @@ static int __devinit twl_rtc_probe(struct platform_device *pdev)
+        if (ret < 0)
+                goto out2;
+ 
++       /* enable backup battery charging */
++       /* use a conservative 25uA @ 3.1V */
++       ret = twl_i2c_write_u8(TWL4030_MODULE_PM_RECEIVER,
++               BIT_PM_RECEIVER_BB_CFG_BBCHEN |
++               BIT_PM_RECEIVER_BB_CFG_BBSEL_3V1 |
++               BIT_PM_RECEIVER_BB_CFG_BBISEL_25UA,
++               REG_BB_CFG);
++
+        return ret;
+ 
+ out2:
+-- 
+1.6.6.1
+