@@ -78,6 +78,16 @@
gpio9 = &gpioj;
gpio10 = &gpiok;
};
+
+ led1 {
+ compatible = "st,led1";
+ led-gpio = <&gpioi 1 0>;
+ };
+
+ button1 {
+ compatible = "st,button1";
+ button-gpio = <&gpioi 11 0>;
+ };
};
&clk_hse {
@@ -17,6 +17,7 @@
#include <asm/arch/stm32_periph.h>
#include <asm/arch/stm32_defs.h>
#include <asm/arch/syscfg.h>
+#include <asm/gpio.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -72,6 +73,42 @@ u32 get_board_rev(void)
return 0;
}
+int board_late_init(void)
+{
+ struct gpio_desc gpio = {};
+ int node;
+
+ node = fdt_node_offset_by_compatible(gd->fdt_blob, 0, "st,led1");
+ if (node < 0)
+ return -1;
+
+ gpio_request_by_name_nodev(gd->fdt_blob, node, "led-gpio", 0, &gpio,
+ GPIOD_IS_OUT);
+
+ if (dm_gpio_is_valid(&gpio)) {
+ dm_gpio_set_value(&gpio, 0);
+ mdelay(10);
+ dm_gpio_set_value(&gpio, 1);
+ }
+
+ /* read button 1*/
+ node = fdt_node_offset_by_compatible(gd->fdt_blob, 0, "st,button1");
+ if (node < 0)
+ return -1;
+
+ gpio_request_by_name_nodev(gd->fdt_blob, node, "button-gpio", 0, &gpio,
+ GPIOD_IS_IN);
+
+ if (dm_gpio_is_valid(&gpio)) {
+ if (dm_gpio_get_value(&gpio))
+ puts("usr button is at HIGH LEVEL\n");
+ else
+ puts("usr button is at LOW LEVEL\n");
+ }
+
+ return 0;
+}
+
int board_init(void)
{
gd->bd->bi_boot_params = CONFIG_SYS_SDRAM_BASE + 0x100;
@@ -75,4 +75,5 @@
#define CONFIG_CMD_MEM
#define CONFIG_CMD_CACHE
+#define CONFIG_BOARD_LATE_INIT
#endif /* __CONFIG_H */
All discovery boards have one user button & one user LED. Here we are just reading the button status & switching ON the user LED. Signed-off-by: Vikas Manocha <vikas.manocha@st.com> cc: Christophe KERELLO <christophe.kerello@st.com> --- Changed in v4: None Changed in v3: None Changed in v2: None arch/arm/dts/stm32f746-disco.dts | 10 ++++++++ board/st/stm32f746-disco/stm32f746-disco.c | 37 ++++++++++++++++++++++++++++++ include/configs/stm32f746-disco.h | 1 + 3 files changed, 48 insertions(+)