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mfd: rk808: determine whether the stored data of the PMIC_POWER_EN OTP is valid

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If the system doesn't save the PMIC_POWER_EN OTP, we don't have to write
it back.

Fixes: c0570888f0 ("mfd: rk808: Set only resetting pmic register for 817&809.")
Signed-off-by: shengfei Xu <xsf@rock-chips.com>
Change-Id: I3cb391202a2967060b79f5bd7af1ebbcc82e9d9a
This commit is contained in:
shengfei Xu
2020-04-26 10:48:26 +08:00
committed by Tao Huang
parent ff4de39737
commit 227808eed5
1 changed files with 22 additions and 10 deletions
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32
drivers/mfd/rk808.c
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@@ -1060,16 +1060,28 @@ static int rk817_reboot_notifier_handler(struct notifier_block *nb,
regmap_read(data->rk808->regmap, RK817_POWER_EN_SAVE0,
&power_en_active0);
regmap_read(data->rk808->regmap, RK817_POWER_EN_SAVE1,
&power_en_active1);
value = power_en_active0 & 0x0f;
regmap_write(data->rk808->regmap, RK817_POWER_EN_REG(0), value | 0xf0);
value = (power_en_active0 & 0xf0) >> 4;
regmap_write(data->rk808->regmap, RK817_POWER_EN_REG(1), value | 0xf0);
value = power_en_active1 & 0x0f;
regmap_write(data->rk808->regmap, RK817_POWER_EN_REG(2), value | 0xf0);
value = (power_en_active1 & 0xf0) >> 4;
regmap_write(data->rk808->regmap, RK817_POWER_EN_REG(3), value | 0xf0);
if (power_en_active0 != 0) {
regmap_read(data->rk808->regmap, RK817_POWER_EN_SAVE1,
&power_en_active1);
value = power_en_active0 & 0x0f;
regmap_write(data->rk808->regmap,
RK817_POWER_EN_REG(0),
value | 0xf0);
value = (power_en_active0 & 0xf0) >> 4;
regmap_write(data->rk808->regmap,
RK817_POWER_EN_REG(1),
value | 0xf0);
value = power_en_active1 & 0x0f;
regmap_write(data->rk808->regmap,
RK817_POWER_EN_REG(2),
value | 0xf0);
value = (power_en_active1 & 0xf0) >> 4;
regmap_write(data->rk808->regmap,
RK817_POWER_EN_REG(3),
value | 0xf0);
} else {
dev_info(dev, "reboot: not restore POWER_EN\n");
}
if (action != SYS_RESTART)
return NOTIFY_OK;