[U-Boot] [PATCH] pmic: ltc3676: add regulator config function

[Tim Harvey]

Add a convenience function for configuring the most common characteristics
of an LTC3676 buck regulator.

Signed-off-by: Tim Harvey <tharvey at 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);
+	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
-- 
2.7.4