i2c: Add a DM_I2C driver for the sun6i P2WI controller
This bus controller is used to communicate with an X-Powers AXP PMIC.
Currently, various drivers access PMIC registers through a platform-
specific non-DM "pmic_bus" interface, which depends on the legacy I2C
framework. In order to convert those drivers to use DM_PMIC, this bus
needs a DM_I2C driver.
Refactor the p2wi functions to take the base address as a parameter,
and implement both the existing interface (which is still needed in
SPL) and the DM_I2C interface on top of them.
The register for switching between I2C/P2WI/RSB mode is the same across
all PMIC variants. Move that to the common header, so it can be used by
both interface implementations.
Signed-off-by: Samuel Holland <samuel@sholland.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
index da35cc8..f4a4528 100644
--- a/arch/arm/mach-sunxi/Kconfig
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -88,17 +88,6 @@
feature.
endif
-config SUN6I_P2WI
- bool "Allwinner sun6i internal P2WI controller"
- help
- If you say yes to this option, support will be included for the
- P2WI (Push/Pull 2 Wire Interface) controller embedded in some sunxi
- SOCs.
- The P2WI looks like an SMBus controller (which supports only byte
- accesses), except that it only supports one slave device.
- This interface is used to connect to specific PMIC devices (like the
- AXP221).
-
config SUN6I_PRCM
bool
help
@@ -232,10 +221,11 @@
select ARCH_SUPPORT_PSCI
select DRAM_SUN6I
select PHY_SUN4I_USB
- select SUN6I_P2WI
+ select SPL_I2C
select SUN6I_PRCM
select SUNXI_GEN_SUN6I
select SUPPORT_SPL
+ select SYS_I2C_SUN6I_P2WI
select ARMV7_BOOT_SEC_DEFAULT if OLD_SUNXI_KERNEL_COMPAT
config MACH_SUN7I