rockchip: Port IO-domain driver for RK3568 from linux
Port the Rockchip IO-domain driver for RK3568 from linux.
The driver auto probe after bind to configure IO-domain based on the
regulator voltage. Compared to the linux driver this driver is not
notified about regulator voltage changes and only configure IO-domain
based on the initial voltage autoset by the regulator.
It is not recommended to enable MMC_IO_VOLTAGE or the mmc signal voltage
and IO-domain may end up out of sync.
Based on the linux commit 28b05a64e47c ("soc: rockchip: io-domain: add
rk3568 support").
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index c930e4a..fccd9b8 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -101,6 +101,15 @@
addressing and a length or through child-nodes that are generated
based on the e-fuse map retrieved from the DTS.
+config ROCKCHIP_IODOMAIN
+ bool "Rockchip IO-domain driver support"
+ depends on DM_REGULATOR && ARCH_ROCKCHIP
+ default y if ROCKCHIP_RK3568
+ help
+ Enable support for IO-domains in Rockchip SoCs. It is necessary
+ for the IO-domain setting of the SoC to match the voltage supplied
+ by the regulators.
+
config SIFIVE_OTP
bool "SiFive eMemory OTP driver"
depends on MISC