Add a convenience function for configuring the most common characteristics
of an LTC3676 buck regulator.
Signed-off-by: Tim Harvey <thar...@gateworks.com>
---
drivers/power/pmic/pmic_ltc3676.c | 16 ++++++++++++++++
include/power/ltc3676_pmic.h | 40 +++++++++++++++++++++++++++++++++++++++
2 files changed, 56 insertions(+)
diff --git a/drivers/power/pmic/pmic_ltc3676.c
b/drivers/power/pmic/pmic_ltc3676.c
index 9b874cb..af795ea 100644
--- a/drivers/power/pmic/pmic_ltc3676.c
+++ b/drivers/power/pmic/pmic_ltc3676.c
@@ -30,3 +30,19 @@ int power_ltc3676_init(unsigned char bus)
return 0;
}
+
+void power_ltc3676_swconfig(struct pmic *p, enum ltc3676_sw sw,
+ enum ltc3676_mode mode, enum ltc3676_phase phase,
+ enum ltc3676_freq freq)
+{
+ u32 reg;
+
+ pmic_reg_read(p, LTC3676_BUCK1 + sw, ®);
+ reg &= ~LTC3676_MODE_MASK;
+ reg |= (mode << LTC3676_MODE);
+ reg &= ~(1 << LTC3676_PHASE);
+ reg |= (phase << LTC3676_PHASE);
+ reg &= ~(1 << LTC3676_FREQ);
+ reg |= (freq << LTC3676_FREQ);
+ pmic_reg_write(p, LTC3676_BUCK1 + sw, reg);
+}
diff --git a/include/power/ltc3676_pmic.h b/include/power/ltc3676_pmic.h
index dcaa985..f5b0f3c 100644
--- a/include/power/ltc3676_pmic.h
+++ b/include/power/ltc3676_pmic.h
@@ -42,10 +42,50 @@ enum {
* SW Configuration
*/
+/* DVB<x> registers */
#define LTC3676_DVB_MASK 0x1f
#define LTC3676_PGOOD_MASK (1<<5)
#define LTC3676_REF_SELA (0<<5)
#define LTC3676_REF_SELB (1<<5)
+/* BUCK<x> registers */
+#define LTC3676_MODE_MASK 0x60
+#define LTC3676_MODE 5
+#define LTC3676_STARTUP 4
+#define LTC3676_PHASE 3
+#define LTC3676_FREQ 2
+#define LTC3676_KEEPALIVE 1
+#define LTC3676_RATE 0
+
+enum ltc3676_sw {
+ SW1 = 0,
+ SW2 = 1,
+ SW3 = 2,
+ SW4 = 3
+};
+
+enum ltc3676_mode {
+ PFM = 0, /* pulse-skipping */
+ APF = 1, /* burst - auto switches */
+ PWM = 2, /* forced continuous */
+};
+
+enum ltc3676_phase {
+ PHASE1 = 0,
+ PHASE2 = 1,
+};
+
+enum ltc3676_freq {
+ F2250KHZ = 0,
+ F1125KHZ = 1,
+};
+
+enum ltc3676_rate {
+ SLOW = 0,
+ FAST = 1,
+};
+
int power_ltc3676_init(unsigned char bus);
+void power_ltc3676_swconfig(struct pmic *, enum ltc3676_sw, enum ltc3676_mode,
+ enum ltc3676_phase, enum ltc3676_freq);
#endif
--
1.9.1
_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
http://lists.denx.de/mailman/listinfo/u-boot
