[U-Boot] [PATCH v3 4/8] ARMV7: Add support for the TWL6030 I2C power chip used in OMAP4 systems

Steve Sakoman steve at sakoman.com
Tue Aug 3 23:59:47 CEST 2010


This patch add the basic infrastructure for the TWL6030 driver and enables
support in the two existing OMAP4 boards, Panda and OMAP4430 SDP

Signed-off-by: Steve Sakoman <steve at sakoman.com>
---

This version adds the GPL "or (at your option) any later version" clause per Wolfgang's request

 drivers/power/Makefile          |    1 +
 drivers/power/twl6030.c         |   78 +++++++++++++++++++++++++++++++++
 include/configs/omap4_panda.h   |    3 +
 include/configs/omap4_sdp4430.h |    3 +
 include/twl6030.h               |   91 +++++++++++++++++++++++++++++++++++++++
 5 files changed, 176 insertions(+), 0 deletions(-)
 create mode 100644 drivers/power/twl6030.c
 create mode 100644 include/twl6030.h

diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index dd06514..db53173 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -26,6 +26,7 @@ include $(TOPDIR)/config.mk
 LIB 	:= $(obj)libpower.a
 
 COBJS-$(CONFIG_TWL4030_POWER)	+= twl4030.o
+COBJS-$(CONFIG_TWL6030_POWER)	+= twl6030.o
 
 COBJS	:= $(COBJS-y)
 SRCS 	:= $(COBJS:.o=.c)
diff --git a/drivers/power/twl6030.c b/drivers/power/twl6030.c
new file mode 100644
index 0000000..cf1da6b
--- /dev/null
+++ b/drivers/power/twl6030.c
@@ -0,0 +1,78 @@
+/*
+ * (C) Copyright 2010
+ * Texas Instruments, <www.ti.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <config.h>
+#ifdef CONFIG_TWL6030_POWER
+
+#include <twl6030.h>
+
+/* Functions to read and write from TWL6030 */
+static inline int twl6030_i2c_write_u8(u8 chip_no, u8 val, u8 reg)
+{
+	return i2c_write(chip_no, reg, 1, &val, 1);
+}
+
+static inline int twl6030_i2c_read_u8(u8 chip_no, u8 *val, u8 reg)
+{
+	return i2c_read(chip_no, reg, 1, val, 1);
+}
+
+void twl6030_start_usb_charging(void)
+{
+	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_VICHRG_1500,
+							CHARGERUSB_VICHRG);
+	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CIN_LIMIT_NONE,
+							CHARGERUSB_CINLIMIT);
+	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, MBAT_TEMP,
+							CONTROLLER_INT_MASK);
+	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, MASK_MCHARGERUSB_THMREG,
+							CHARGERUSB_INT_MASK);
+	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_VOREG_4P0,
+							CHARGERUSB_VOREG);
+	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CHARGERUSB_CTRL2_VITERM_100,
+							CHARGERUSB_CTRL2);
+	/* Enable USB charging */
+	twl6030_i2c_write_u8(TWL6030_CHIP_CHARGER, CONTROLLER_CTRL1_EN_CHARGER,
+							CONTROLLER_CTRL1);
+	return;
+}
+
+void twl6030_init_battery_charging(void)
+{
+	twl6030_start_usb_charging();
+	return;
+}
+
+void twl6030_usb_device_settings()
+{
+	u8 data = 0;
+
+	/* Select APP Group and set state to ON */
+	twl6030_i2c_write_u8(TWL6030_CHIP_PM, 0x21, VUSB_CFG_STATE);
+
+	twl6030_i2c_read_u8(TWL6030_CHIP_PM, &data, MISC2);
+	data |= 0x10;
+
+	/* Select the input supply for VBUS regulator */
+	twl6030_i2c_write_u8(TWL6030_CHIP_PM, data, MISC2);
+}
+#endif
diff --git a/include/configs/omap4_panda.h b/include/configs/omap4_panda.h
index 0fb1ad3..4bec00b 100644
--- a/include/configs/omap4_panda.h
+++ b/include/configs/omap4_panda.h
@@ -103,6 +103,9 @@
 #define CONFIG_DRIVER_OMAP34XX_I2C	1
 #define CONFIG_I2C_MULTI_BUS		1
 
+/* TWL6030 */
+#define CONFIG_TWL6030_POWER		1
+
 /* MMC */
 #define CONFIG_MMC			1
 #define CONFIG_OMAP3_MMC		1
diff --git a/include/configs/omap4_sdp4430.h b/include/configs/omap4_sdp4430.h
index ef5272b..c18e71a 100644
--- a/include/configs/omap4_sdp4430.h
+++ b/include/configs/omap4_sdp4430.h
@@ -104,6 +104,9 @@
 #define CONFIG_DRIVER_OMAP34XX_I2C	1
 #define CONFIG_I2C_MULTI_BUS		1
 
+/* TWL6030 */
+#define CONFIG_TWL6030_POWER		1
+
 /* MMC */
 #define CONFIG_MMC			1
 #define CONFIG_OMAP3_MMC		1
diff --git a/include/twl6030.h b/include/twl6030.h
new file mode 100644
index 0000000..54923ab
--- /dev/null
+++ b/include/twl6030.h
@@ -0,0 +1,91 @@
+/*
+ * (C) Copyright 2010
+ * Texas Instruments, <www.ti.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <i2c.h>
+
+/* I2C chip addresses */
+#define TWL6030_CHIP_PM		0x48
+
+#define TWL6030_CHIP_USB	0x49
+#define TWL6030_CHIP_ADC	0x49
+#define TWL6030_CHIP_CHARGER	0x49
+#define TWL6030_CHIP_PWM	0x49
+
+/* Battery CHARGER REGISTERS */
+#define CONTROLLER_INT_MASK	0xE0
+#define CONTROLLER_CTRL1	0xE1
+#define CONTROLLER_WDG		0xE2
+#define CONTROLLER_STAT1	0xE3
+#define CHARGERUSB_INT_STATUS	0xE4
+#define CHARGERUSB_INT_MASK	0xE5
+#define CHARGERUSB_STATUS_INT1	0xE6
+#define CHARGERUSB_STATUS_INT2	0xE7
+#define CHARGERUSB_CTRL1	0xE8
+#define CHARGERUSB_CTRL2	0xE9
+#define CHARGERUSB_CTRL3	0xEA
+#define CHARGERUSB_STAT1	0xEB
+#define CHARGERUSB_VOREG	0xEC
+#define CHARGERUSB_VICHRG	0xED
+#define CHARGERUSB_CINLIMIT	0xEE
+#define CHARGERUSB_CTRLLIMIT1	0xEF
+
+/* CHARGERUSB_VICHRG */
+#define CHARGERUSB_VICHRG_500		0x4
+#define CHARGERUSB_VICHRG_1500		0xE
+/* CHARGERUSB_CINLIMIT */
+#define CHARGERUSB_CIN_LIMIT_100	0x1
+#define CHARGERUSB_CIN_LIMIT_300	0x5
+#define CHARGERUSB_CIN_LIMIT_500	0x9
+#define CHARGERUSB_CIN_LIMIT_NONE	0xF
+/* CONTROLLER_INT_MASK */
+#define MVAC_FAULT		(1 << 6)
+#define MAC_EOC			(1 << 5)
+#define MBAT_REMOVED		(1 << 4)
+#define MFAULT_WDG		(1 << 3)
+#define MBAT_TEMP		(1 << 2)
+#define MVBUS_DET		(1 << 1)
+#define MVAC_DET		(1 << 0)
+/* CHARGERUSB_INT_MASK */
+#define MASK_MCURRENT_TERM		(1 << 3)
+#define MASK_MCHARGERUSB_STAT		(1 << 2)
+#define MASK_MCHARGERUSB_THMREG		(1 << 1)
+#define MASK_MCHARGERUSB_FAULT		(1 << 0)
+/* CHARGERUSB_VOREG */
+#define CHARGERUSB_VOREG_3P52		0x01
+#define CHARGERUSB_VOREG_4P0		0x19
+#define CHARGERUSB_VOREG_4P2		0x23
+#define CHARGERUSB_VOREG_4P76		0x3F
+/* CHARGERUSB_CTRL2 */
+#define CHARGERUSB_CTRL2_VITERM_50	(0 << 5)
+#define CHARGERUSB_CTRL2_VITERM_100	(1 << 5)
+#define CHARGERUSB_CTRL2_VITERM_150	(2 << 5)
+/* CONTROLLER_CTRL1 */
+#define CONTROLLER_CTRL1_EN_CHARGER	(1 << 4)
+#define CONTROLLER_CTRL1_SEL_CHARGER	(1 << 3)
+
+#define VUSB_CFG_STATE		0xA2
+#define MISC2			0xE5
+
+void twl6030_init_battery_charging(void);
+void twl6030_usb_device_settings(void);
-- 
1.7.0.4





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