apalis-tk1: support v1.2 hardware revision
Support the V1.2 hardware revision with the following pin muxing
changes:
Ddc_scl_pv4 and ddc_sda_pv5 previously used as Apalis GPIO3 and GPIO4
are now used as DDC pins.
Gen2_i2c_scl_pt5 and gen2_i2c_sda_pt6 previously used as DDC pins are
now used as USB power enable signals.
Usb_vbus_en0_pn4 and usb_vbus_en1_pn5 previously used as USB power
enable signals are now used as GPIO3 and GPIO4.
Additionally a new device tree file tegra124-apalis-v1.2-eval.dtb is
loaded on V1.2 and later modules and resp. USB power enable signals
activated.
Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Signed-off-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
diff --git a/board/toradex/apalis-tk1/apalis-tk1.c b/board/toradex/apalis-tk1/apalis-tk1.c
index d57c504..beb7e10 100644
--- a/board/toradex/apalis-tk1/apalis-tk1.c
+++ b/board/toradex/apalis-tk1/apalis-tk1.c
@@ -10,6 +10,7 @@
#include <asm/io.h>
#include <asm/arch/gpio.h>
#include <asm/arch/pinmux.h>
+#include <environment.h>
#include <pci_tegra.h>
#include <power/as3722.h>
#include <power/pmic.h>
@@ -25,6 +26,10 @@
#define PEX_PERST_N TEGRA_GPIO(DD, 1) /* Apalis GPIO7 */
#define RESET_MOCI_CTRL TEGRA_GPIO(U, 4)
#endif /* CONFIG_APALIS_TK1_PCIE_EVALBOARD_INIT */
+#define VCC_USBH TEGRA_GPIO(T, 6)
+#define VCC_USBH_V1_0 TEGRA_GPIO(N, 5)
+#define VCC_USBO1 TEGRA_GPIO(T, 5)
+#define VCC_USBO1_V1_0 TEGRA_GPIO(N, 4)
int arch_misc_init(void)
{
@@ -32,6 +37,38 @@
NVBOOTTYPE_RECOVERY)
printf("USB recovery mode\n");
+ /* PCB Version Indication: V1.2 and later have GPIO_PV0 wired to GND */
+ gpio_request(TEGRA_GPIO(V, 0), "PCB Version Indication");
+ gpio_direction_input(TEGRA_GPIO(V, 0));
+ if (gpio_get_value(TEGRA_GPIO(V, 0))) {
+ /*
+ * if using the default device tree for new V1.2 and later HW,
+ * use version for older V1.0 and V1.1 HW
+ */
+ char *fdt_env = env_get("fdt_module");
+
+ if (fdt_env && !strcmp(FDT_MODULE, fdt_env)) {
+ env_set("fdt_module", FDT_MODULE_V1_0);
+ printf("patching fdt_module to " FDT_MODULE_V1_0
+ " for older V1.0 and V1.1 HW\n");
+#ifndef CONFIG_ENV_IS_NOWHERE
+ env_save();
+#endif
+ }
+
+ /* activate USB power enable GPIOs */
+ gpio_request(VCC_USBH_V1_0, "VCC_USBH");
+ gpio_direction_output(VCC_USBH_V1_0, 1);
+ gpio_request(VCC_USBO1_V1_0, "VCC_USBO1");
+ gpio_direction_output(VCC_USBO1_V1_0, 1);
+ } else {
+ /* activate USB power enable GPIOs */
+ gpio_request(VCC_USBH, "VCC_USBH");
+ gpio_direction_output(VCC_USBH, 1);
+ gpio_request(VCC_USBO1, "VCC_USBO1");
+ gpio_direction_output(VCC_USBO1, 1);
+ }
+
return 0;
}