feat(allwinner): allow to skip PMIC regulator setup
For somewhat historical reasons we are doing some initial PMIC regulator
setup in BL31, as U-Boot does not (yet) have a PMIC driver. This worked
fine so far, but there is at least one board (OrangePi 3) that gets upset,
because the Ethernet PHY needs some *coordinated* bringup of *two*
regulators.
To avoid custom hacks, let's introduce a build option to keep doing the
regulator setup in TF-A. Defining SUNXI_SETUP_REGULATORS to 0 will break
support for some devices on some boards in U-Boot (Ethernet and HDMI),
but will allow to bring up the OrangePi 3 in Linux correctly. We keep
the default at 1 to not change the behaviour for all other boards.
After U-Boot gained proper PMIC support at some point in the future, we
will probably change the default to 0, to get rid of the less optimal
PMIC code in TF-A.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Change-Id: Ie8e2583d0396f6eeaae8ffe6b6190f27db63e2a7
diff --git a/drivers/allwinner/axp/axp805.c b/drivers/allwinner/axp/axp805.c
index 8d029c0..3a03fec 100644
--- a/drivers/allwinner/axp/axp805.c
+++ b/drivers/allwinner/axp/axp805.c
@@ -9,6 +9,7 @@
const uint8_t axp_chip_id = AXP805_CHIP_ID;
const char *const axp_compatible = "x-powers,axp805";
+#if SUNXI_SETUP_REGULATORS == 1
/*
* The "dcdcd" split changes the step size by a factor of 5, not 2;
* disallow values above the split to maintain accuracy.
@@ -31,3 +32,4 @@
{"cldo3", 700, 3300, 100, NA, 0x26, 0x11, 6},
{}
};
+#endif