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authorFelipe Balbi <balbi@ti.com>2015-01-06 09:14:36 -0600
committerTom Rini <trini@ti.com>2015-01-13 15:26:10 -0500
commit78fb6e31669f85943aef8806053d443168cbb4be (patch)
treeb1c55b018329e98e879a73a631dc64db7e939789
parentd5c082a32db7568fc03f30f6893cd54ff664e1b1 (diff)
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pmic: add tps62362 simple wrapper code
This regulator is used with AM437x IDK to feed VDD_MPU, without means to scale VDD_MPU we can't support higher frequencies. Signed-off-by: Felipe Balbi <balbi@ti.com>
-rw-r--r--drivers/power/pmic/Makefile1
-rw-r--r--drivers/power/pmic/pmic_tps62362.c47
-rw-r--r--include/power/tps62362.h29
3 files changed, 77 insertions, 0 deletions
diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index e7b07eb..985cfdb 100644
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -14,5 +14,6 @@ obj-$(CONFIG_POWER_PFUZE100) += pmic_pfuze100.o
obj-$(CONFIG_POWER_TPS65090_I2C) += pmic_tps65090.o
obj-$(CONFIG_POWER_TPS65090_EC) += pmic_tps65090_ec.o
obj-$(CONFIG_POWER_TPS65217) += pmic_tps65217.o
+obj-$(CONFIG_POWER_TPS65218) += pmic_tps62362.o
obj-$(CONFIG_POWER_TPS65218) += pmic_tps65218.o
obj-$(CONFIG_POWER_TPS65910) += pmic_tps65910.o
diff --git a/drivers/power/pmic/pmic_tps62362.c b/drivers/power/pmic/pmic_tps62362.c
new file mode 100644
index 0000000..2123685
--- /dev/null
+++ b/drivers/power/pmic/pmic_tps62362.c
@@ -0,0 +1,47 @@
+/*
+ * (C) Copyright 2014 Texas Instruments Incorporated - http://www.ti.com
+ * Author: Felipe Balbi <balbi@ti.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <asm/errno.h>
+#include <power/pmic.h>
+#include <power/tps62362.h>
+
+/**
+ * tps62362_voltage_update() - Function to change a voltage level, as this
+ * is a multi-step process.
+ * @reg: Register address to write to
+ * @volt_sel: Voltage register value to write
+ * @return: 0 on success, 1 on failure
+ */
+int tps62362_voltage_update(unsigned char reg, unsigned char volt_sel)
+{
+ if (reg > TPS62362_NUM_REGS)
+ return 1;
+
+ return i2c_write(TPS62362_I2C_ADDR, reg, 1, &volt_sel, 1);
+}
+
+int power_tps62362_init(unsigned char bus)
+{
+ static const char name[] = "TPS62362";
+ struct pmic *p = pmic_alloc();
+
+ if (!p) {
+ printf("%s: POWER allocation error!\n", __func__);
+ return -ENOMEM;
+ }
+
+ p->name = name;
+ p->interface = PMIC_I2C;
+ p->number_of_regs = TPS62362_NUM_REGS;
+ p->hw.i2c.addr = TPS62362_I2C_ADDR;
+ p->hw.i2c.tx_num = 1;
+ p->bus = bus;
+
+ return 0;
+}
diff --git a/include/power/tps62362.h b/include/power/tps62362.h
new file mode 100644
index 0000000..720c338
--- /dev/null
+++ b/include/power/tps62362.h
@@ -0,0 +1,29 @@
+/*
+ * (C) Copyright 2014 Texas Instruments Incorporated - http://www.ti.com
+ * Author: Felipe Balbi <balbi@ti.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef __POWER_TPS62362_H__
+#define __POWER_TPS62362_H__
+
+/* I2C chip address */
+#define TPS62362_I2C_ADDR 0x60
+
+/* Registers */
+#define TPS62362_SET0 0x00
+#define TPS62362_SET1 0x01
+#define TPS62362_SET2 0x02
+#define TPS62362_SET3 0x03
+#define TPS62362_NUM_REGS 4
+
+#define TPS62362_DCDC_VOLT_SEL_0950MV 0x12
+#define TPS62362_DCDC_VOLT_SEL_1100MV 0x21
+#define TPS62362_DCDC_VOLT_SEL_1200MV 0x2b
+#define TPS62362_DCDC_VOLT_SEL_1260MV 0x31
+#define TPS62362_DCDC_VOLT_SEL_1330MV 0x38
+
+int tps62362_voltage_update(unsigned char reg, unsigned char volt_sel);
+int power_tps62362_init(unsigned char bus);
+#endif /* __POWER_TPS62362_H__ */