From 91f27f3ba854409a3575a5b2d6e3f31526092f2b Mon Sep 17 00:00:00 2001 From: Lukasz Majewski <lukma@denx.de> Date: Wed, 13 Oct 2021 15:40:12 +0200 Subject: [PATCH] mxs: power: Change sequence of enabling DCDC switches The imx28 uses following voltage supplies hierarchy: VDD_5V (VDD_BAT) -> VDDIO -> VDDA -> VDDMEM \-----> VDDD One shall first enable DCDC on the parent source (VDDIO) and then follow with its children. Signed-off-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com> Reviewed-by: Fabio Estevam <festevam@gmail.com> --- arch/arm/cpu/arm926ejs/mxs/spl_power_init.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/cpu/arm926ejs/mxs/spl_power_init.c b/arch/arm/cpu/arm926ejs/mxs/spl_power_init.c index 35ea71a5ba..c33170f06d 100644 --- a/arch/arm/cpu/arm926ejs/mxs/spl_power_init.c +++ b/arch/arm/cpu/arm926ejs/mxs/spl_power_init.c @@ -627,11 +627,11 @@ static void mxs_power_enable_4p2(void) mxs_power_init_dcdc_4p2_source(); - writel(vdddctrl, &power_regs->hw_power_vdddctrl); + writel(vddioctrl, &power_regs->hw_power_vddioctrl); early_delay(20); writel(vddactrl, &power_regs->hw_power_vddactrl); early_delay(20); - writel(vddioctrl, &power_regs->hw_power_vddioctrl); + writel(vdddctrl, &power_regs->hw_power_vdddctrl); /* * Check if FET is enabled on either powerout and if so, -- 2.39.5