There are different board versions. Make use of it to be able to get
proper kernel devicetree.
Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
---
arch/arm/boards/udoo-neo/board.c | 91 +++++++++++++++++++++++++++++++-
1 file changed, 89 insertions(+), 2 deletions(-)
diff --git a/arch/arm/boards/udoo-neo/board.c b/arch/arm/boards/udoo-neo/board.c
index e2078e3395..ffdb70dfae 100644
--- a/arch/arm/boards/udoo-neo/board.c
+++ b/arch/arm/boards/udoo-neo/board.c
@@ -2,12 +2,99 @@
// SPDX-FileCopyrightText: 2014 Sascha Hauer, Pengutronix
#include <common.h>
-#include <init.h>
-#include <linux/clk.h>
#include <deep-probe.h>
+#include <gpio.h>
+#include <mach/bbu.h>
+#include <mach/imx6.h>
+
+/**
+ * Detects the board model by checking the R184 and R185 resistors.
+ * A mounted resistor (0Ohm) connects the GPIO to ground, so the
+ * GPIO value will be 0.
+ *
+ * FULL - Eth, WiFi, motion sensors, 1GB RAM -> R184 not mounted - R185 mounted
+ * EXTENDED - NO Eth, WiFi, motion sensors, 1GB RAM -> R184 not mounted - R185 not mounted
+ * BASE - Eth, NO WiFi, NO motion sensors, 512MB RAM -> R184 mounted - R185 mounted
+ * BASE KS - NO Eth, WiFi, NO motion sensors, 512MB RAM -> R184 mounted - R185 not mounted
+ */
+
+enum imx6sx_udoneo_board_type {
+ UDOO_NEO_BASIC = 0,
+ UDOO_NEO_BASIC_KS = 1,
+ UDOO_NEO_FULL = 2,
+ UDOO_NEO_EXTENDED = 3,
+ UDOO_NEO_UNKNOWN,
+};
+
+#define GPIO_R184 IMX_GPIO_NR(4, 13)
+#define GPIO_R185 IMX_GPIO_NR(4, 0)
+
+static enum imx6sx_udoneo_board_type imx6sx_udoneo_detect(struct device *dev)
+{
+ struct device_node *gpio_np = NULL;
+ int r184, r185;
+ int ret;
+
+ gpio_np = of_find_node_by_name_address(NULL, "gpio@20a8000");
+ if (gpio_np) {
+ ret = of_device_ensure_probed(gpio_np);
+ if (ret) {
+ dev_warn(dev, "Can't probe GPIO node\n");
+ goto detect_error;
+ }
+ } else {
+ dev_warn(dev, "Can't get GPIO node\n");
+ goto detect_error;
+ }
+
+ ret = gpio_request(GPIO_R184, "version r184");
+ if (ret)
+ goto detect_error;
+
+ ret = gpio_request(GPIO_R185, "version r185");
+ if (ret)
+ goto detect_error;
+
+ ret = gpio_direction_input(GPIO_R184);
+ if (ret)
+ goto detect_error;
+
+ ret = gpio_direction_input(GPIO_R185);
+ if (ret)
+ goto detect_error;
+
+ r184 = gpio_get_value(GPIO_R184);
+ r185 = gpio_get_value(GPIO_R185);
+
+ return r184 << 1 | r185 << 0;
+
+detect_error:
+ dev_warn(dev, "Board detection failed\n");
+
+ return UDOO_NEO_UNKNOWN;
+}
static int imx6sx_udoneo_probe(struct device *dev)
{
+ enum imx6sx_udoneo_board_type type;
+ const char *model;
+
+ type = imx6sx_udoneo_detect(dev);
+ switch (type) {
+ case UDOO_NEO_FULL:
+ model = "UDOO Neo Full";
+ break;
+ case UDOO_NEO_EXTENDED:
+ model = "UDOO Neo Extended";
+ break;
+ case UDOO_NEO_BASIC:
+ model = "UDOO Neo Basic";
+ break;
+ default:
+ model = "UDOO Neo unknown";
+ }
+
+ barebox_set_model(model);
barebox_set_hostname("mx6sx-udooneo");
return 0;
--
2.30.2
