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

Tom Rini
2013-07-19T19:00:22Z

From: Greg Guyotte <gguyotte@ti.com>

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

Signed-off-by: Greg Guyotte <gguyotte@ti.com>
[trini: Split and rework Greg's changes into new drivers/power
framework]
Signed-off-by: Tom Rini <trini@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