[PATCH 4/5] dm: adc: Add SPL_ADC Kconfig symbol for use of ADC in SPL

[Jonas Karlman]

What model of Radxa ZERO 3W/3E boards can be identified using ADC at
runtime, add a Kconfig symbol to allow use of ADC in SPL.

This will be used to identify board model in SPL to allow loading
correct FIT configuration and FDT for U-Boot proper at SPL phase.

Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
---
 drivers/Makefile    | 2 +-
 drivers/adc/Kconfig | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/Makefile b/drivers/Makefile
index 9195dafd37e0..1acd94f3c17e 100644
--- a/drivers/Makefile
+++ b/drivers/Makefile
@@ -1,5 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0+
 
+obj-$(CONFIG_$(SPL_TPL_)ADC) += adc/
 obj-$(CONFIG_$(SPL_TPL_)BIOSEMU) += bios_emulator/
 obj-$(CONFIG_$(SPL_TPL_)BLK) += block/
 obj-$(CONFIG_$(SPL_TPL_)BOOTCOUNT_LIMIT) += bootcount/
@@ -81,7 +82,6 @@ endif
 
 ifeq ($(CONFIG_SPL_BUILD)$(CONFIG_TPL_BUILD),)
 
-obj-y += adc/
 obj-y += ata/
 obj-$(CONFIG_DM_DEMO) += demo/
 obj-y += block/
diff --git a/drivers/adc/Kconfig b/drivers/adc/Kconfig
index c9cdbe6942de..eb705f9e0fb8 100644
--- a/drivers/adc/Kconfig
+++ b/drivers/adc/Kconfig
@@ -11,6 +11,10 @@ config ADC
 	  - support supply's phandle with auto-enable
 	  - supply polarity setting in fdt
 
+config SPL_ADC
+	bool "Enable ADC drivers using Driver Model in SPL"
+	depends on ADC
+
 config ADC_EXYNOS
 	bool "Enable Exynos 54xx ADC driver"
 	depends on ADC
-- 
2.45.2