[U-Boot] [PATCH 3/6] drivers/power/pmic: Add tps65910 driver

[Tom Rini <trini@ti.com>]

From: "Philip, Avinash" <avinashphilip@ti.com>

Add a driver for the TPS65910 PMIC that is found in the AM335x GP EVM,
AM335x EVM SK and others.

Signed-off-by: Philip, Avinash <avinashphilip@ti.com>
[trini: Split and rework Avinash's changes into new drivers/power
framework]
Signed-off-by: Tom Rini <trini@ti.com>
---
 drivers/power/pmic/Makefile        |    1 +
 drivers/power/pmic/pmic_tps65910.c |   69 +++++++++++++++++++++++++++++++
 include/power/tps65910.h           |   79 ++++++++++++++++++++++++++++++++++++
 3 files changed, 149 insertions(+)
 create mode 100644 drivers/power/pmic/pmic_tps65910.c
 create mode 100644 include/power/tps65910.h

diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index 473cb80..1811080 100644
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -30,6 +30,7 @@ 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-$(CONFIG_POWER_TPS65910) += pmic_tps65910.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)
diff --git a/drivers/power/pmic/pmic_tps65910.c b/drivers/power/pmic/pmic_tps65910.c
new file mode 100644
index 0000000..0303f71
--- /dev/null
+++ b/drivers/power/pmic/pmic_tps65910.c
@@ -0,0 +1,69 @@
+/*
+ * (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/tps65910.h>
+
+/*
+ * voltage switching for MPU frequency switching.
+ * @module = mpu - 0, core - 1
+ * @vddx_op_vol_sel = vdd voltage to set
+ */
+int tps65910_voltage_update(unsigned int module, unsigned char vddx_op_vol_sel)
+{
+	uchar buf[4];
+	unsigned int reg_offset;
+
+	if (module == MPU)
+		reg_offset = TPS65910_VDD1_OP_REG;
+	else
+		reg_offset = TPS65910_VDD2_OP_REG;
+
+	/* Select VDDx OP   */
+	if (i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, buf, 1))
+		return 1;
+
+	buf[0] &= ~TPS65910_OP_REG_CMD_MASK;
+
+	if (i2c_write(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, buf, 1))
+		return 1;
+
+	/* Configure VDDx OP  Voltage */
+	if (i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, buf, 1))
+		return 1;
+
+	buf[0] &= ~TPS65910_OP_REG_SEL_MASK;
+	buf[0] |= vddx_op_vol_sel;
+
+	if (i2c_write(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, buf, 1))
+		return 1;
+
+	if (i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, buf, 1))
+		return 1;
+
+	if ((buf[0] & TPS65910_OP_REG_SEL_MASK) != vddx_op_vol_sel)
+		return 1;
+
+	return 0;
+}
diff --git a/include/power/tps65910.h b/include/power/tps65910.h
new file mode 100644
index 0000000..5942721
--- /dev/null
+++ b/include/power/tps65910.h
@@ -0,0 +1,79 @@
+/*
+ * (C) Copyright 2011-2013
+ * Texas Instruments, <www.ti.com>
+ *
+ * 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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+#ifndef __POWER_TPS65910_H__
+#define __POWER_TPS65910_H__
+
+#define MPU     0
+#define CORE    1
+
+int tps65910_voltage_update(unsigned int module, unsigned char vddx_op_vol_sel);
+
+#define TPS65910_SR_I2C_ADDR				0x12
+#define TPS65910_CTRL_I2C_ADDR				0x2D
+
+/* PMIC Register offsets */
+#define TPS65910_VDD1_REG				0x21
+#define TPS65910_VDD1_OP_REG				0x22
+#define TPS65910_VDD2_REG				0x24
+#define TPS65910_VDD2_OP_REG				0x25
+#define TPS65910_DEVCTRL_REG				0x3F
+
+/* VDD2 & VDD1 control register (VDD2_REG & VDD1_REG) */
+#define TPS65910_VGAIN_SEL_MASK				(0x3 << 6)
+#define TPS65910_ILMAX_MASK				(0x1 << 5)
+#define TPS65910_TSTEP_MASK				(0x7 << 2)
+#define TPS65910_ST_MASK				(0x3)
+
+#define TPS65910_REG_VGAIN_SEL_X1			(0x0 << 6)
+#define TPS65910_REG_VGAIN_SEL_X1_0			(0x1 << 6)
+#define TPS65910_REG_VGAIN_SEL_X3			(0x2 << 6)
+#define TPS65910_REG_VGAIN_SEL_X4			(0x3 << 6)
+
+#define TPS65910_REG_ILMAX_1_0_A			(0x0 << 5)
+#define TPS65910_REG_ILMAX_1_5_A			(0x1 << 5)
+
+#define TPS65910_REG_TSTEP_				(0x0 << 2)
+#define TPS65910_REG_TSTEP_12_5				(0x1 << 2)
+#define TPS65910_REG_TSTEP_9_4				(0x2 << 2)
+#define TPS65910_REG_TSTEP_7_5				(0x3 << 2)
+#define TPS65910_REG_TSTEP_6_25				(0x4 << 2)
+#define TPS65910_REG_TSTEP_4_7				(0x5 << 2)
+#define TPS65910_REG_TSTEP_3_12				(0x6 << 2)
+#define TPS65910_REG_TSTEP_2_5				(0x7 << 2)
+
+#define TPS65910_REG_ST_OFF				(0x0)
+#define TPS65910_REG_ST_ON_HI_POW			(0x1)
+#define TPS65910_REG_ST_OFF_1				(0x2)
+#define TPS65910_REG_ST_ON_LOW_POW			(0x3)
+
+
+/* VDD2 & VDD1 voltage selection register. (VDD2_OP_REG & VDD1_OP_REG) */
+#define TPS65910_OP_REG_SEL				(0x7F)
+
+#define TPS65910_OP_REG_CMD_MASK			(0x1 << 7)
+#define TPS65910_OP_REG_CMD_OP				(0x0 << 7)
+#define TPS65910_OP_REG_CMD_SR				(0x1 << 7)
+
+#define TPS65910_OP_REG_SEL_MASK			(0x7F)
+#define TPS65910_OP_REG_SEL_0_9_5			(0x1F)	/* 0.9500 V */
+#define TPS65910_OP_REG_SEL_1_1_3			(0x2E)	/* 1.1375 V */
+#define TPS65910_OP_REG_SEL_1_2_0			(0x33)	/* 1.2000 V */
+#define TPS65910_OP_REG_SEL_1_2_6			(0x38)	/* 1.2625 V */
+#define TPS65910_OP_REG_SEL_1_3_2_5			(0x3D)	/* 1.3250 V */
+
+/* Device control register . (DEVCTRL_REG) */
+#define TPS65910_DEVCTRL_REG_SR_CTL_I2C_MASK		(0x1 << 4)
+#define TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_SR_I2C	(0x0 << 4)
+#define TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_CTL_I2C	(0x1 << 4)
+#endif
-- 
1.7.9.5