[PATCH V4 4/7] board: rockchip: Add Recovery Button for Anbernic RGxx3

[Chris Morgan <macroalpha82@gmail.com>]

From: Chris Morgan <macromorgan@hotmail.com>

Add support for users to enter recovery mode by holding the function
button when they power up the device.

Since the device has soldered eMMC and sometimes does not expose a clk
pin on the mainboard there is a small chance that a user who flashes a
bad bootloader may not be able to recover if the headers themselves
are valid. As a result this check is done during spl_early_init() to
ensure that it runs as early as possible, and it does so by directly
manipulating the ADC hardware in lieu of loading the ADC driver.

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
---
 arch/arm/dts/rk3566-anbernic-rgxx3-u-boot.dtsi | 11 +++++++++++
 board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c     |  6 +++++-
 configs/anbernic-rgxx3-rk3566_defconfig        | 16 ++++++++++++----
 include/configs/anbernic-rgxx3-rk3566.h        |  2 ++
 4 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/arch/arm/dts/rk3566-anbernic-rgxx3-u-boot.dtsi b/arch/arm/dts/rk3566-anbernic-rgxx3-u-boot.dtsi
index f986e1941e..e3ab196d22 100644
--- a/arch/arm/dts/rk3566-anbernic-rgxx3-u-boot.dtsi
+++ b/arch/arm/dts/rk3566-anbernic-rgxx3-u-boot.dtsi
@@ -76,6 +76,12 @@
 	/delete-property/ clock-names;
 };
 
+&saradc {
+	bootph-all;
+	vref-supply = <&vcc_sys>;
+	status = "okay";
+};
+
 &sdhci {
 	pinctrl-0 = <&emmc_bus8>, <&emmc_clk>, <&emmc_cmd>,
 		    <&emmc_datastrobe>, <&emmc_rstnout>;
@@ -94,3 +100,8 @@
 	bootph-all;
 	status = "okay";
 };
+
+&vcc_sys {
+	bootph-all;
+	status = "okay";
+};
diff --git a/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c b/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c
index 3d0c614623..45854709f5 100644
--- a/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c
+++ b/board/anbernic/rgxx3_rk3566/rgxx3-rk3566.c
@@ -5,6 +5,7 @@
 
 #include <abuf.h>
 #include <adc.h>
+#include <asm/arch-rockchip/boot_mode.h>
 #include <asm/io.h>
 #include <display.h>
 #include <dm.h>
@@ -119,11 +120,14 @@ static const struct rg353_panel rg353_panel_details[] = {
 };
 
 /*
- * Start LED very early so user knows device is on. Set color
+ * Check if rockchip_dnl button is pressed and reboot into rockusb if
+ * true. Start LED very early so user knows device is on. Set color
  * to red.
  */
 void spl_board_init(void)
 {
+	setup_boot_mode();
+
 	/* Set GPIO0_C5, GPIO0_C6, and GPIO0_C7 to output. */
 	writel(GPIO_WRITEMASK(GPIO_C7 | GPIO_C6 | GPIO_C5) | \
 	       (GPIO_C7 | GPIO_C6 | GPIO_C5),
diff --git a/configs/anbernic-rgxx3-rk3566_defconfig b/configs/anbernic-rgxx3-rk3566_defconfig
index ed6643d9d4..4e72f75815 100644
--- a/configs/anbernic-rgxx3-rk3566_defconfig
+++ b/configs/anbernic-rgxx3-rk3566_defconfig
@@ -3,6 +3,7 @@ CONFIG_SKIP_LOWLEVEL_INIT=y
 CONFIG_COUNTER_FREQUENCY=24000000
 CONFIG_ARCH_ROCKCHIP=y
 CONFIG_TEXT_BASE=0x00a00000
+CONFIG_SPL_GPIO=y
 CONFIG_SPL_LIBCOMMON_SUPPORT=y
 CONFIG_SPL_LIBGENERIC_SUPPORT=y
 CONFIG_NR_DRAM_BANKS=2
@@ -24,7 +25,9 @@ CONFIG_SYS_LOAD_ADDR=0xc00800
 CONFIG_DEBUG_UART=y
 CONFIG_FIT=y
 CONFIG_FIT_VERBOSE=y
+CONFIG_SPL_FIT_SIGNATURE=y
 CONFIG_SPL_LOAD_FIT=y
+CONFIG_LEGACY_IMAGE_FORMAT=y
 CONFIG_OF_BOARD_SETUP=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y
 CONFIG_DEFAULT_FDT_FILE="rockchip/rk3566-anbernic-rgxx3.dtb"
@@ -32,7 +35,7 @@ CONFIG_DEFAULT_FDT_FILE="rockchip/rk3566-anbernic-rgxx3.dtb"
 # CONFIG_DISPLAY_CPUINFO is not set
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_BOARD_RNG_SEED=y
-CONFIG_SPL_MAX_SIZE=0x20000
+CONFIG_SPL_MAX_SIZE=0x40000
 CONFIG_SPL_PAD_TO=0x7f8000
 CONFIG_SPL_HAS_BSS_LINKER_SECTION=y
 CONFIG_SPL_BSS_START_ADDR=0x4000000
@@ -41,6 +44,8 @@ CONFIG_SPL_BOARD_INIT=y
 # CONFIG_SPL_RAW_IMAGE_SUPPORT is not set
 # CONFIG_SPL_SHARES_INIT_SP_ADDR is not set
 CONFIG_SPL_STACK_R=y
+CONFIG_SPL_ADC=y
+CONFIG_SPL_POWER=y
 CONFIG_SPL_ATF=y
 CONFIG_CMD_PWM=y
 CONFIG_CMD_GPT=y
@@ -50,8 +55,10 @@ CONFIG_CMD_MMC=y
 # CONFIG_SPL_DOS_PARTITION is not set
 CONFIG_SPL_OF_CONTROL=y
 CONFIG_OF_LIVE=y
+CONFIG_OF_SPL_REMOVE_PROPS="clock-names interrupt-parent assigned-clocks assigned-clock-rates assigned-clock-parents"
 CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
 # CONFIG_NET is not set
+CONFIG_SPL_DM_SEQ_ALIAS=y
 CONFIG_SPL_REGMAP=y
 CONFIG_SPL_SYSCON=y
 CONFIG_SPL_CLK=y
@@ -67,13 +74,13 @@ CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_SDMA=y
 CONFIG_MMC_SDHCI_ROCKCHIP=y
 CONFIG_PHY_ROCKCHIP_INNO_DSIDPHY=y
+CONFIG_SPL_PINCTRL=y
 CONFIG_DM_PMIC=y
 CONFIG_DM_PMIC_FAN53555=y
 CONFIG_PMIC_RK8XX=y
-CONFIG_REGULATOR_PWM=y
-CONFIG_DM_REGULATOR_GPIO=y
+CONFIG_SPL_DM_REGULATOR=y
+CONFIG_SPL_DM_REGULATOR_FIXED=y
 CONFIG_REGULATOR_RK8XX=y
-CONFIG_DM_REGULATOR_SCMI=y
 CONFIG_PWM_ROCKCHIP=y
 CONFIG_SPL_RAM=y
 # CONFIG_RAM_ROCKCHIP_DEBUG is not set
@@ -89,5 +96,6 @@ CONFIG_VIDEO_ROCKCHIP=y
 CONFIG_DISPLAY_ROCKCHIP_DW_MIPI=y
 CONFIG_VIDEO_BRIDGE=y
 CONFIG_REGEX=y
+# CONFIG_RSA is not set
 CONFIG_ERRNO_STR=y
 # CONFIG_EFI_LOADER is not set
diff --git a/include/configs/anbernic-rgxx3-rk3566.h b/include/configs/anbernic-rgxx3-rk3566.h
index 3c4ea4e7d8..2aaac55c06 100644
--- a/include/configs/anbernic-rgxx3-rk3566.h
+++ b/include/configs/anbernic-rgxx3-rk3566.h
@@ -9,4 +9,6 @@
 			"stdout=serial,vidconsole\0" \
 			"stderr=serial,vidconsole\0"
 
+#define RK_DNL_ADC_CHAN		0
+
 #endif
-- 
2.34.1