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rk3288: set the rk808 BUCK default inductor current to max value

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Our use of the bucks may exceed their default maximum inductor current.
Just set it to the highest possible value for every buck we configure to
avoid problems... the kernel can later fine-tune the values further if
needed. (Also some slight grammar updates while I'm in there.)

BRANCH=veyron
TEST=Build and Boot on Jerry
BUG=None

Change-Id: I3801cabeb93d7bf7ecc02db0e69d4932c9394db9
Signed-off-by: huang lin <hl@rock-chips.com>
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/242785
Reviewed-by: Douglas Anderson <dianders@chromium.org>
(cherry picked from commit 065a163bb902b8c96d05bfef6ed4885aa20f31cc)
Signed-off-by: Julius Werner <jwerner@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/243126
This commit is contained in:
huang lin 2015-01-23 14:48:42 +08:00 • committed by ChromeOS Commit Bot
commit 856b78d9f7
1 changed files with 5 additions and 2 deletions
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7
src/soc/rockchip/rk3288/rk808.c
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@ -54,6 +54,8 @@
#define RTC_CTRL_GET_TIME (1 << 6)
#define RTC_CTRL_RTC_READSEL (1 << 7)
#define DCDC_ILMAX 0x90
static int rk808_read(uint8_t reg, uint8_t *value)
{
return i2c_readb(CONFIG_PMIC_BUS, RK808_ADDR, reg, value);
@ -118,7 +120,7 @@ void rk808_configure_buck(int buck, int millivolts)
switch (buck) {
case 1:
case 2:
/*base on 725mv, use 25mv step */
/* 25mV steps. base = 29 * 25mV = 725 */
vsel = (div_round_up(millivolts, 25) - 29) * 2 + 1;
assert(vsel <= 0x3f);
buck_reg = BUCK1SEL + 4 * (buck - 1);
@ -129,8 +131,9 @@ void rk808_configure_buck(int buck, int millivolts)
buck_reg = BUCK4SEL;
break;
default:
die("fault buck index!");
die("Unknown buck index!");
}
rk808_clrsetbits(DCDC_ILMAX, 0, 3 << ((buck - 1) * 2));
rk808_clrsetbits(buck_reg, 0x3f, vsel);
rk808_clrsetbits(DCDC_EN, 0, 1 << (buck - 1));
}