board: rockchip: add Powkiddy X55

The Powkiddy X55 is a Rockchip RK3566 based handheld gaming device.
UART, ADC, eMMC, and SDMMC are tested to work in U-Boot and this
successfully boots mainline Linux.

Kernel commit:
e99adc97e21a ("arm64: dts: rockchip: Add Powkiddy X55")

Signed-off-by: Chris Morgan <macromorgan@hotmail.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/board/powkiddy/x55/x55.c b/board/powkiddy/x55/x55.c
new file mode 100644
index 0000000..b2703e6
--- /dev/null
+++ b/board/powkiddy/x55/x55.c
@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (c) 2023 Chris Morgan <macromorgan@hotmail.com>
+ */
+
+#include <asm/io.h>
+
+#define GPIO4_BASE		0xfe770000
+#define GPIO_SWPORT_DR_L	0x0000
+#define GPIO_SWPORT_DDR_L	0x0008
+#define GPIO_B4			BIT(12)
+#define GPIO_B5			BIT(13)
+#define GPIO_B6			BIT(14)
+
+#define GPIO_WRITEMASK(bits)	((bits) << 16)
+
+/*
+ * Start LED very early so user knows device is on. Set color
+ * to red.
+ */
+void spl_board_init(void)
+{
+	/* Set GPIO4_B4, GPIO4_B5, and GPIO4_B6 to output. */
+	writel(GPIO_WRITEMASK(GPIO_B6 | GPIO_B5 | GPIO_B4) | \
+	       (GPIO_B6 | GPIO_B5 | GPIO_B4),
+	       (GPIO4_BASE + GPIO_SWPORT_DDR_L));
+	/* Set GPIO4_B5 and GPIO4_B6 to 0 and GPIO4_B4 to 1. */
+	writel(GPIO_WRITEMASK(GPIO_B6 | GPIO_B5 | GPIO_B4) | GPIO_B4,
+	       (GPIO4_BASE + GPIO_SWPORT_DR_L));
+}
+
+int rk_board_late_init(void)
+{
+	/* Turn off red LED and turn on orange LED. */
+	writel(GPIO_WRITEMASK(GPIO_B6 | GPIO_B5 | GPIO_B4) | GPIO_B6,
+	       (GPIO4_BASE + GPIO_SWPORT_DR_L));
+
+	return 0;
+}