[U-Boot] [PATCH 2/6] drivers/power/pmic: Add tps65217 driver

Tom Rini trini at ti.com
Fri Jul 19 21:00:22 CEST 2013


From: Greg Guyotte <gguyotte at ti.com>

Add a driver for the TPS65217 PMIC that is found in the Beaglebone
family of boards.

Signed-off-by: Greg Guyotte <gguyotte at ti.com>
[trini: Split and rework Greg's changes into new drivers/power
framework]
Signed-off-by: Tom Rini <trini at ti.com>
---
 drivers/power/pmic/Makefile        |    1 +
 drivers/power/pmic/pmic_tps65217.c |  108 ++++++++++++++++++++++++++++++++++++
 include/power/tps65217.h           |   92 ++++++++++++++++++++++++++++++
 3 files changed, 201 insertions(+)
 create mode 100644 drivers/power/pmic/pmic_tps65217.c
 create mode 100644 include/power/tps65217.h

diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index 14d426f..473cb80 100644
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -29,6 +29,7 @@ COBJS-$(CONFIG_POWER_MAX8998) += pmic_max8998.o
 COBJS-$(CONFIG_POWER_MAX8997) += pmic_max8997.o
 COBJS-$(CONFIG_POWER_MUIC_MAX8997) += muic_max8997.o
 COBJS-$(CONFIG_POWER_MAX77686) += pmic_max77686.o
+COBJS-$(CONFIG_POWER_TPS65217) += pmic_tps65217.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)
diff --git a/drivers/power/pmic/pmic_tps65217.c b/drivers/power/pmic/pmic_tps65217.c
new file mode 100644
index 0000000..c84bbcd
--- /dev/null
+++ b/drivers/power/pmic/pmic_tps65217.c
@@ -0,0 +1,108 @@
+/*
+ * (C) Copyright 2011-2013
+ * 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>
+#include <power/tps65217.h>
+
+/**
+ * tps65217_reg_read() - Generic function that can read a TPS65217 register
+ * @src_reg:	  Source register address
+ * @src_val:	  Address of destination variable
+ */
+uchar tps65217_reg_read(uchar src_reg, uchar *src_val)
+{
+	if (i2c_read(TPS65217_CHIP_PM, src_reg, 1, src_val, 1))
+		return 1;
+	return 0;
+}
+
+/**
+ *  tps65217_reg_write() - Generic function that can write a TPS65217 PMIC
+ *			 register or bit field regardless of protection
+ *			 level.
+ *
+ *  @prot_level:	Register password protection.
+ *		      use PROT_LEVEL_NONE, PROT_LEVEL_1, or PROT_LEVEL_2
+ *  @dest_reg:	  Register address to write.
+ *  @dest_val:	  Value to write.
+ *  @mask:	      Bit mask (8 bits) to be applied.  Function will only
+ *		      change bits that are set in the bit mask.
+ *
+ *  @return:	    0 for success, 1 for failure.
+ */
+int tps65217_reg_write(uchar prot_level, uchar dest_reg, uchar dest_val,
+		       uchar mask)
+{
+	uchar read_val;
+	uchar xor_reg;
+
+	/*
+	 * If we are affecting only a bit field, read dest_reg and apply the
+	 * mask
+	 */
+	if (mask != MASK_ALL_BITS) {
+		if (i2c_read(TPS65217_CHIP_PM, dest_reg, 1, &read_val, 1))
+			return 1;
+		read_val &= (~mask);
+		read_val |= (dest_val & mask);
+		dest_val = read_val;
+	}
+
+	if (prot_level > 0) {
+		xor_reg = dest_reg ^ PASSWORD_UNLOCK;
+		if (i2c_write(TPS65217_CHIP_PM, PASSWORD, 1, &xor_reg, 1))
+			return 1;
+	}
+
+	if (i2c_write(TPS65217_CHIP_PM, dest_reg, 1, &dest_val, 1))
+		return 1;
+
+	if (prot_level == PROT_LEVEL_2) {
+		if (i2c_write(TPS65217_CHIP_PM, PASSWORD, 1, &xor_reg, 1))
+			return 1;
+
+		if (i2c_write(TPS65217_CHIP_PM, dest_reg, 1, &dest_val, 1))
+			return 1;
+	}
+
+	return 0;
+}
+
+int tps65217_voltage_update(uchar dc_cntrl_reg, uchar volt_sel)
+{
+	if ((dc_cntrl_reg != DEFDCDC1) && (dc_cntrl_reg != DEFDCDC2) &&
+	    (dc_cntrl_reg != DEFDCDC3))
+		return 1;
+
+	/* set voltage level */
+	if (tps65217_reg_write(PROT_LEVEL_2, dc_cntrl_reg, volt_sel,
+			       MASK_ALL_BITS))
+		return 1;
+
+	/* set GO bit to initiate voltage transition */
+	if (tps65217_reg_write(PROT_LEVEL_2, DEFSLEW, DCDC_GO, DCDC_GO))
+		return 1;
+
+	return 0;
+}
diff --git a/include/power/tps65217.h b/include/power/tps65217.h
new file mode 100644
index 0000000..c12a709
--- /dev/null
+++ b/include/power/tps65217.h
@@ -0,0 +1,92 @@
+/*
+ * (C) Copyright 2011-2013
+ * 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
+ */
+
+#ifndef __TPS65217_H__
+#define __TPS65217_H__
+
+/* I2C chip address */
+#define TPS65217_CHIP_PM		0x24
+
+/* Registers */
+#define CHIPID				0x00
+#define POWER_PATH			0x01
+#define INTERRUPT			0x02
+#define CHGCONFIG0			0x03
+#define CHGCONFIG1			0x04
+#define CHGCONFIG2			0x05
+#define CHGCONFIG3			0x06
+#define WLEDCTRL1			0x07
+#define WLEDCTRL2			0x08
+#define MUXCTRL				0x09
+#define STATUS				0x0A
+#define PASSWORD			0x0B
+#define PGOOD				0x0C
+#define DEFPG				0x0D
+#define DEFDCDC1			0x0E
+#define DEFDCDC2			0x0F
+#define DEFDCDC3			0x10
+#define DEFSLEW				0x11
+#define DEFLDO1				0x12
+#define DEFLDO2				0x13
+#define DEFLS1				0x14
+#define DEFLS2				0x15
+#define ENABLE				0x16
+#define DEFUVLO				0x18
+#define SEQ1				0x19
+#define SEQ2				0x1A
+#define SEQ3				0x1B
+#define SEQ4				0x1C
+#define SEQ5				0x1D
+#define SEQ6				0x1E
+
+#define PROT_LEVEL_NONE			0x00
+#define PROT_LEVEL_1			0x01
+#define PROT_LEVEL_2			0x02
+
+#define PASSWORD_LOCK_FOR_WRITE		0x00
+#define PASSWORD_UNLOCK			0x7D
+
+#define DCDC_GO				0x80
+
+#define MASK_ALL_BITS			0xFF
+
+#define USB_INPUT_CUR_LIMIT_MASK	0x03
+#define USB_INPUT_CUR_LIMIT_100MA	0x00
+#define USB_INPUT_CUR_LIMIT_500MA	0x01
+#define USB_INPUT_CUR_LIMIT_1300MA	0x02
+#define USB_INPUT_CUR_LIMIT_1800MA	0x03
+
+#define DCDC_VOLT_SEL_1275MV		0x0F
+#define DCDC_VOLT_SEL_1325MV		0x11
+
+#define LDO_MASK			0x1F
+#define LDO_VOLTAGE_OUT_3_3		0x1F
+
+#define PWR_SRC_USB_BITMASK		0x4
+#define PWR_SRC_AC_BITMASK		0x8
+
+uchar tps65217_reg_read(uchar src_reg, uchar *src_val);
+int tps65217_reg_write(uchar prot_level, uchar dest_reg, uchar dest_val,
+		       uchar mask);
+int tps65217_voltage_update(uchar dc_cntrl_reg, uchar volt_sel);
+#endif
-- 
1.7.9.5



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