[U-Boot] [PATCH 11/18] stm32f746: to switch on user LED1 & read user button

[Vikas Manocha]

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.mano...@st.com>
cc: Christophe KERELLO <christophe.kere...@st.com>
---
 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(+)

diff --git a/arch/arm/dts/stm32f746-disco.dts b/arch/arm/dts/stm32f746-disco.dts
index f830aa9..8e4576b 100644
--- a/arch/arm/dts/stm32f746-disco.dts
+++ b/arch/arm/dts/stm32f746-disco.dts
@@ -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 {
diff --git a/board/st/stm32f746-disco/stm32f746-disco.c 
b/board/st/stm32f746-disco/stm32f746-disco.c
index 45a2c47..52c1900 100644
--- a/board/st/stm32f746-disco/stm32f746-disco.c
+++ b/board/st/stm32f746-disco/stm32f746-disco.c
@@ -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;
diff --git a/include/configs/stm32f746-disco.h 
b/include/configs/stm32f746-disco.h
index fe3ac34..f5f9f0b 100644
--- a/include/configs/stm32f746-disco.h
+++ b/include/configs/stm32f746-disco.h
@@ -81,4 +81,5 @@
 #define CONFIG_CMDLINE_EDITING
 
 #define CONFIG_CMD_MEM
+#define CONFIG_BOARD_LATE_INIT
 #endif /* __CONFIG_H */
-- 
1.9.1

_______________________________________________
U-Boot mailing list
U-Boot@lists.denx.de
https://lists.denx.de/listinfo/u-boot