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OMAP3: pandora: enable battery backup capacitor

PATCH New Grazvydas Ignotas 2 participants 3 messages Apr 29, 2010 – Jun 8, 2010

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Grazvydas Ignotas

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#0 lore raw

PATCH 1/1 OMAP3: pandora: enable battery backup capacitor

Pandora has a capacitor connected as backup battery, which allows retaining RTC for some time while main battery is removed. Enable backup battery charge function to charge that capacitor.

Signed-off-by Grazvydas Ignotas <[email protected]>
---
 board/pandora/pandora.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
board/pandora/pandora.c +9 -0
index 75e4330..355e9ea 100644
@@ -37,6 +37,10 @@
 #include <asm/mach-types.h>
 #include "pandora.h"
 
+#define TWL4030_BB_CFG_BBCHEN		(1 << 4)
+#define TWL4030_BB_CFG_BBSEL_3200MV	(3 << 2)
+#define TWL4030_BB_CFG_BBISEL_500UA	2
+
 /*
  * Routine: board_init
  * Description: Early hardware init.

@@ -78,6 +82,11 @@ int misc_init_r(void)
 	writel(GPIO28, &gpio5_base->setdataout);
 	writel(GPIO4, &gpio6_base->setdataout);
 
+	/* Enable battery backup capacitor (3.2V, 0.5mA charge current) */
+	twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER,
+		TWL4030_BB_CFG_BBCHEN | TWL4030_BB_CFG_BBSEL_3200MV |
+		TWL4030_BB_CFG_BBISEL_500UA, TWL4030_PM_RECEIVER_BB_CFG);
+
 	dieid_num_r();
 
 	return 0;
Signature · 1 line
1.6.3.3
author
#1 lore raw

PATCH 1/1 OMAP3: pandora: enable battery backup capacitor

CCing Sandeep.

Quoted 40 lines · Grazvydas Ignotas

Pandora has a capacitor connected as backup battery, which allows retaining RTC for some time while main battery is removed. Enable backup battery charge function to charge that capacitor.

Signed-off-by Grazvydas Ignotas <[email protected]>

---
?board/pandora/pandora.c | ? ?9 +++++++++
?1 files changed, 9 insertions(+), 0 deletions(-)

board/pandora/pandora.c +0 -0
index 75e4330..355e9ea 100644
@@ -37,6 +37,10 @@

?#include <asm/mach-types.h>
?#include "pandora.h"

board/pandora/pandora.c +4 -0
+#define TWL4030_BB_CFG_BBCHEN ? ? ? ? ?(1 << 4)
+#define TWL4030_BB_CFG_BBSEL_3200MV ? ?(3 << 2)
+#define TWL4030_BB_CFG_BBISEL_500UA ? ?2
+

?/*
?* Routine: board_init
?* Description: Early hardware init.

board/pandora/pandora.c +5 -1
@@ -78,6 +82,11 @@ int misc_init_r(void)
 ? ? ? ?writel(GPIO28, &gpio5_base->setdataout);
 ? ? ? ?writel(GPIO4, &gpio6_base->setdataout);
 
+ ? ? ? /* Enable battery backup capacitor (3.2V, 0.5mA charge current) */
+ ? ? ? twl4030_i2c_write_u8(TWL4030_CHIP_PM_RECEIVER,
+ ? ? ? ? ? ? ? TWL4030_BB_CFG_BBCHEN | TWL4030_BB_CFG_BBSEL_3200MV |
+ ? ? ? ? ? ? ? TWL4030_BB_CFG_BBISEL_500UA, TWL4030_PM_RECEIVER_BB_CFG);
+
 ? ? ? ?dieid_num_r();
 
 ? ? ? ?return 0;
--

1.6.3.3

#2 lore raw

PATCH 1/1 OMAP3: pandora: enable battery backup capacitor

Quoted 16 lines

CCing Sandeep.

Quoted 9 lines · Grazvydas Ignotas

Pandora has a capacitor connected as backup battery, which allows retaining RTC for some time while main battery is removed. Enable backup battery charge function to charge that capacitor.

Signed-off-by Grazvydas Ignotas <[email protected]>

---
?board/pandora/pandora.c | ? ?9 +++++++++
?1 files changed, 9 insertions(+), 0 deletions(-)

I have pushed this to u-boot-ti/master.

This will be part of my next pull request to Tom

Thanks,
Sandeep