i2c: Convert CONFIG_POWER_I2C et al to Kconfig

This converts the following to Kconfig:
   CONFIG_POWER_I2C
   CONFIG_POWER_LEGACY

They are handled at the same time due to a dependency between them.
Update the Makefile rule to use legacy power only in U-Boot proper.
Unfortunately a separate rule is needed in SPL to be able to build
legacy power.  Add SPL related symbols for both, to allow for SPL-only
usage.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
[trini: More SPL related cleanups, reword commit message]
Signed-off-by: Tom Rini <trini@konsulko.com>

2 files changed, 52 insertions, 2 deletions

diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 26257a72bc..f5681c947e 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -1,5 +1,34 @@
 menu "Power"
 
+config POWER_LEGACY
+	bool "Legacy power support"
+	help
+	  Note: This is a legacy option. Use DM_PMIC instead.
+
+	  Enable support for power control in U-Boot. This includes support
+	  for PMICs (Power-management Integrated Circuits) and some of the
+	  features provided by PMICs. In particular, voltage regulators can
+	  be used to enable/disable power and vary its voltage. That can be
+	  useful in U-Boot to turn on boot peripherals and adjust CPU voltage
+	  so that the clock speed can be increased. This enables the drivers
+	  in drivers/power, drivers/power/pmic and drivers/power/regulator
+	  as part of a build.
+
+config SPL_POWER_LEGACY
+	bool "Legacy power support in SPL"
+	default y if POWER_LEGACY
+	help
+	  Note: This is a legacy option. Use SPL_DM_PMIC instead.
+
+	  Enable support for power control in SPL. This includes support
+	  for PMICs (Power-management Integrated Circuits) and some of the
+	  features provided by PMICs. In particular, voltage regulators can
+	  be used to enable/disable power and vary its voltage. That can be
+	  useful in SPL to turn on boot peripherals and adjust CPU voltage
+	  so that the clock speed can be increased. This enables the drivers
+	  in drivers/power, drivers/power/pmic and drivers/power/regulator
+	  as part of a build.
+
 source "drivers/power/acpi_pmc/Kconfig"
 
 source "drivers/power/domain/Kconfig"
@@ -383,4 +412,25 @@ config POWER_MT6323
 	  This adds poweroff driver for mt6323
 	  this pmic is used on mt7623 / Bananapi R2
 
+config POWER_I2C
+	bool "I2C-based power control for legacy power"
+	depends on POWER_LEGACY
+	help
+	  Enable this to use the I2C driver designed for the legacy PMIC
+	  interface.
+
+	  Not to be used for new designs and existing ones should be moved to
+	  the new PMIC interface based on driver model.
+
+config SPL_POWER_I2C
+	bool "I2C-based power control for legacy power"
+	depends on SPL_POWER_LEGACY
+	default y if POWER_I2C
+	help
+	  Enable this to use the I2C driver designed for the legacy PMIC
+	  interface.
+
+	  Not to be used for new designs and existing ones should be moved to
+	  the new PMIC interface based on driver model.
+
 endmenu
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index ab52bc1582..801b727c90 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -16,9 +16,9 @@ obj-$(CONFIG_TPS6586X_POWER)	+= tps6586x.o
 obj-$(CONFIG_TWL4030_POWER)	+= twl4030.o
 obj-$(CONFIG_TWL6030_POWER)	+= twl6030.o
 obj-$(CONFIG_PALMAS_POWER)	+= palmas.o
-obj-$(CONFIG_POWER_LEGACY) += power_core.o
+obj-$(CONFIG_$(SPL_TPL_)POWER_LEGACY) += power_core.o
 obj-$(CONFIG_DIALOG_POWER) += power_dialog.o
 obj-$(CONFIG_POWER_FSL) += power_fsl.o
-obj-$(CONFIG_POWER_I2C) += power_i2c.o
+obj-$(CONFIG_$(SPL_TPL_)POWER_I2C) += power_i2c.o
 obj-$(CONFIG_POWER_SPI) += power_spi.o
 obj-$(CONFIG_POWER_MT6323) += mt6323.o