From ccd3ab2de8c02181507bd73a377ac4219d165263 Mon Sep 17 00:00:00 2001 From: Andre Przywara Date: Wed, 19 Sep 2018 21:17:00 +0100 Subject: [PATCH] allwinner: PMIC: AXP803: Delay activation of DC1SW switch There are reports that activating the DC1SW before certain other regulators leads to the PMIC overheating and consequently shutting down. To avoid this situation, delay the activation of the DC1SW line until the very end, so those other lines are always activated earlier. Signed-off-by: Andre Przywara --- plat/allwinner/sun50i_a64/sunxi_power.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/plat/allwinner/sun50i_a64/sunxi_power.c b/plat/allwinner/sun50i_a64/sunxi_power.c index 9a273399..af304773 100644 --- a/plat/allwinner/sun50i_a64/sunxi_power.c +++ b/plat/allwinner/sun50i_a64/sunxi_power.c @@ -217,6 +217,7 @@ static int setup_regulator(const void *fdt, int node, static void setup_axp803_rails(const void *fdt) { int node; + bool dc1sw = false; /* locate the PMIC DT node, bail out if not found */ node = fdt_node_offset_by_compatible(fdt, -1, "x-powers,axp803"); @@ -252,11 +253,19 @@ static void setup_axp803_rails(const void *fdt) } if (!strncmp(name, "dc1sw", length)) { - INFO("PMIC: AXP803: Enabling DC1SW\n"); - axp_setbits(0x12, BIT(7)); + /* Delay DC1SW enablement to avoid overheating. */ + dc1sw = true; continue; } } + /* + * If DLDO2 is enabled after DC1SW, the PMIC overheats and shuts + * down. So always enable DC1SW as the very last regulator. + */ + if (dc1sw) { + INFO("PMIC: AXP803: Enabling DC1SW\n"); + axp_setbits(0x12, BIT(7)); + } } int sunxi_pmic_setup(uint16_t socid, const void *fdt) -- 2.30.2