Add the following functions:
tps65218_reg_read() for accessing redisters
tps65218_toggle_fseal() for toggling the fseal bit
tps65218_lock_fsea() for locking the fseal bit to 1
Add the following defines:
All status register bits
Cc: Tom Rini <tr...@konsulko.com>
Cc: Albert Aribaud <albert.u.b...@aribaud.net>
Cc: Igor Grinberg <grinb...@compulab.co.il>
Signed-off-by: Nikita Kiryanov <nik...@compulab.co.il>
---
drivers/power/pmic/pmic_tps65218.c | 56 ++++++++++++++++++++++++++++++++++++++
include/power/tps65218.h | 12 ++++++++
2 files changed, 68 insertions(+)
diff --git a/drivers/power/pmic/pmic_tps65218.c
b/drivers/power/pmic/pmic_tps65218.c
index dbc7a73..0fd0ad4 100644
--- a/drivers/power/pmic/pmic_tps65218.c
+++ b/drivers/power/pmic/pmic_tps65218.c
@@ -11,6 +11,20 @@
#include <power/pmic.h>
#include <power/tps65218.h>
+int tps65218_reg_read(uchar dest_reg, uchar *dest_val)
+{
+ uchar read_val;
+ int ret;
+
+ ret = i2c_read(TPS65218_CHIP_PM, dest_reg, 1, &read_val, 1);
+ if (ret)
+ return ret;
+
+ *dest_val = read_val;
+
+ return 0;
+}
+
/**
* tps65218_reg_write() - Generic function that can write a TPS65218 PMIC
* register or bit field regardless of protection
@@ -98,6 +112,48 @@ int tps65218_voltage_update(uchar dc_cntrl_reg, uchar
volt_sel)
return 0;
}
+/**
+ * tps65218_toggle_fseal() - Perform the sequence that toggles the FSEAL bit.
+ *
+ * @return: 0 on success, -EBADE if the sequence was broken
+ */
+int tps65218_toggle_fseal(void)
+{
+ if (tps65218_reg_write(TPS65218_PROT_LEVEL_NONE, TPS65218_PASSWORD,
+ 0xb1, TPS65218_MASK_ALL_BITS))
+ return -EBADE;
+
+ if (tps65218_reg_write(TPS65218_PROT_LEVEL_NONE, TPS65218_PASSWORD,
+ 0xfe, TPS65218_MASK_ALL_BITS))
+ return -EBADE;
+
+ if (tps65218_reg_write(TPS65218_PROT_LEVEL_NONE, TPS65218_PASSWORD,
+ 0xa3, TPS65218_MASK_ALL_BITS))
+ return -EBADE;
+
+ return 0;
+}
+
+/**
+ * tps65218_lock_fseal() - Perform the sequence that locks the FSEAL bit to 1.
+ *
+ * The FSEAL bit prevents the PMIC from turning off DCDC5 and DCDC6. It can be
+ * toggled at most 3 times: 0->1, 1->0, and finally 0->1. After the third
switch
+ * its value is locked and can only be reset by powering off the PMIC entirely.
+ *
+ * @return: 0 on success, -EBADE if the sequence was broken
+ */
+int tps65218_lock_fseal(void)
+{
+ int i;
+
+ for (i = 0; i < 3; i++)
+ if (tps65218_toggle_fseal())
+ return -EBADE;
+
+ return 0;
+}
+
int power_tps65218_init(unsigned char bus)
{
static const char name[] = "TPS65218_PMIC";
diff --git a/include/power/tps65218.h b/include/power/tps65218.h
index 63fc7b3..4d68faa 100644
--- a/include/power/tps65218.h
+++ b/include/power/tps65218.h
@@ -8,6 +8,8 @@
#ifndef __POWER_TPS65218_H__
#define __POWER_TPS65218_H__
+#include <linux/bitops.h>
+
/* I2C chip address */
#define TPS65218_CHIP_PM 0x24
@@ -60,8 +62,18 @@ enum {
#define TPS65218_DCDC_VOLT_SEL_1260MV 0x29
#define TPS65218_DCDC_VOLT_SEL_1330MV 0x30
+#define TPS65218_CC_STAT (BIT(0) | BIT(1))
+#define TPS65218_STATE (BIT(2) | BIT(3))
+#define TPS65218_PB_STATE BIT(4)
+#define TPS65218_AC_STATE BIT(5)
+#define TPS65218_EE BIT(6)
+#define TPS65218_FSEAL BIT(7)
+
+int tps65218_reg_read(uchar dest_reg, uchar *dest_val);
int tps65218_reg_write(uchar prot_level, uchar dest_reg, uchar dest_val,
uchar mask);
int tps65218_voltage_update(uchar dc_cntrl_reg, uchar volt_sel);
+int tps65218_toggle_fseal(void);
+int tps65218_lock_fseal(void);
int power_tps65218_init(unsigned char bus);
#endif /* __POWER_TPS65218_H__ */
--
1.9.1
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
