1 files changed, 38 insertions, 0 deletions
diff --git a/board/kontron/pitx_imx8m/pitx_misc.c b/board/kontron/pitx_imx8m/pitx_misc.c
new file mode 100644
index 0000000000..48b29c4bd3
--- /dev/null
+++ b/board/kontron/pitx_imx8m/pitx_misc.c
@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0+
+#include <asm/arch/imx8mq_pins.h>
+#include <asm-generic/gpio.h>
+#include <asm/mach-imx/gpio.h>
+
+/*
+ *   BRD_REV1   BRD_REV0
+ *      0         0         n/a
+ *      0         1         n/a
+ *      1         0         2GB LPDDR4
+ *      1         1         4GB LPDDR4
+ */
+
+#define BRD_REV0  IMX_GPIO_NR(5, 0)
+#define BRD_REV1  IMX_GPIO_NR(5, 1)
+
+static iomux_v3_cfg_t const brdrev_pads[] = {
+	IMX8MQ_PAD_SAI3_TXC__GPIO5_IO0 | MUX_PAD_CTRL(PAD_CTL_PUE),
+	IMX8MQ_PAD_SAI3_TXD__GPIO5_IO1 | MUX_PAD_CTRL(PAD_CTL_PUE),
+	IMX8MQ_PAD_SAI3_MCLK__GPIO5_IO2 | MUX_PAD_CTRL(PAD_CTL_PUE),
+};
+
+int get_pitx_board_variant(void)
+{
+	int variant = 0;
+
+	imx_iomux_v3_setup_multiple_pads(brdrev_pads, ARRAY_SIZE(brdrev_pads));
+
+	gpio_request(BRD_REV0, "BRD_REV0");
+	gpio_direction_input(BRD_REV0);
+	gpio_request(BRD_REV1, "BRD_REV1");
+	gpio_direction_input(BRD_REV1);
+
+	variant |= !!gpio_get_value(BRD_REV0) << 0;
+	variant |= !!gpio_get_value(BRD_REV1) << 1;
+
+	return variant;
+}