New patch to review for coreboot: google/gru: Init the PWM pinmux after setting up the PWM

[Patrick Georgi]

Patrick Georgi ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/16700

-gerrit

commit 455e4f4b068970b0512191d62a054fab5031b666
Author: Douglas Anderson 
Date:   Tue Sep 6 13:51:03 2016 -0700

google/gru: Init the PWM pinmux after setting up the PWM

If we setup the PWM _after_ the pinmux then there's a period of time
    when we're driving the PWM incorrectly.  Let's setup the regulator and
    _then_ configure the pinmux.

This fixes no known bugs, but it is more correct and probably makes the
    signals look better at bootup.

BRANCH=None
    BUG=None
    TEST=scope

Change-Id: I311c0eded873b65e0489373e87b88bcdd8e4b806
    Signed-off-by: Patrick Georgi 
    Original-Commit-Id: fcf4d0ba29d82cce779c0b25ead36de4a95d97a1
    Original-Change-Id: I5124f48d04a18c07bbd2d54bc08ee001c9c7e8d1
    Original-Signed-off-by: Douglas Anderson 
    Original-Reviewed-on: https://chromium-review.googlesource.com/381592
    Original-Reviewed-by: Simon Glass 
    Original-Reviewed-by: Julius Werner 
---
 src/mainboard/google/gru/pwm_regulator.c | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/src/mainboard/google/gru/pwm_regulator.c b/src/mainboard/google/gru/pwm_regulator.c
index d0cdf43..d6d2eec 100644
--- a/src/mainboard/google/gru/pwm_regulator.c
+++ b/src/mainboard/google/gru/pwm_regulator.c
@@ -44,21 +44,6 @@ void pwm_regulator_configure(enum pwm_regulator pwm, int millivolt)
    int duty_ns, voltage_max, voltage_min;
    int voltage = millivolt * 10; /* for higer calculation accuracy */

-	switch (pwm) {
-	case PWM_REGULATOR_GPU:
-		write32(&rk3399_grf->iomux_pwm_0, IOMUX_PWM_0);
-		break;
-	case PWM_REGULATOR_BIG:
-		write32(&rk3399_grf->iomux_pwm_1, IOMUX_PWM_1);
-		break;
-	case PWM_REGULATOR_LIT:
-		write32(&rk3399_pmugrf->iomux_pwm_2, IOMUX_PWM_2);
-		break;
-	case PWM_REGULATOR_CENTERLOG:
-		write32(&rk3399_pmugrf->iomux_pwm_3a, IOMUX_PWM_3_A);
-		break;
-	}
-
    voltage_min = PWM_DESIGN_VOLTAGE_MIN;
    voltage_max = PWM_DESIGN_VOLTAGE_MAX;
    if (!(IS_ENABLED(CONFIG_BOARD_GOOGLE_KEVIN) && board_id() < 6) &&
@@ -80,4 +65,19 @@ void pwm_regulator_configure(enum pwm_regulator pwm, int millivolt)
    		     / (voltage_max - voltage_min);

pwm_init(pwm, PWM_PERIOD, duty_ns);
+
+	switch (pwm) {
+	case PWM_REGULATOR_GPU:
+		write32(&rk3399_grf->iomux_pwm_0, IOMUX_PWM_0);
+		break;
+	case PWM_REGULATOR_BIG:
+		write32(&rk3399_grf->iomux_pwm_1, IOMUX_PWM_1);
+		break;
+	case PWM_REGULATOR_LIT:
+		write32(&rk3399_pmugrf->iomux_pwm_2, IOMUX_PWM_2);
+		break;
+	case PWM_REGULATOR_CENTERLOG:
+		write32(&rk3399_pmugrf->iomux_pwm_3a, IOMUX_PWM_3_A);
+		break;
+	}
 }