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arm: mxs: Provide Kconfig option to disable battery charging at IMX28 PMU

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This new Kconfig option allows disabling the in-PMU battery charging
block. This may be required when DCDC_BAT source is powered not from
battery, but from already regulated, good quality source.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
This commit is contained in:
Lukasz Majewski 2023-05-09 16:32:40 +02:00 committed by Stefano Babic
parent 1c3c601ac5
commit 249a3cc1af
2 changed files with 11 additions and 0 deletions
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7
arch/arm/cpu/arm926ejs/mxs/spl_power_init.c
View file

@ -756,6 +756,13 @@ static void mxs_batt_boot(void)
setbits_le32(&power_regs->hw_power_5vctrl,
POWER_5VCTRL_ILIMIT_EQ_ZERO);
if (CONFIG_IS_ENABLED(MXS_PMU_DISABLE_BATT_CHARGE)) {
writel(POWER_CHARGE_PWD_BATTCHRG,
&power_regs->hw_power_charge_set);
writel(POWER_5VCTRL_PWD_CHARGE_4P2_MASK,
&power_regs->hw_power_5vctrl_set);
}
mxs_power_enable_4p2();
}

4
arch/arm/mach-imx/mxs/Kconfig
View file

@ -59,6 +59,10 @@ config SPL_MXS_PMU_MINIMAL_VDD5V_CURRENT
by the PMU is reduced to zero - the DCDC_BATT is used as
the main power source for PMU.
config SPL_MXS_PMU_DISABLE_BATT_CHARGE
bool "Disable Battery Charging in MX28 PMU"
default n
source "board/freescale/mx28evk/Kconfig"
source "board/liebherr/xea/Kconfig"