clearfog: ext board: LED blinking at power-up
My goal is to activate this blinking ASAP so that a proper indication is
shown even during, e.g., U-Boot's three-second waiting for a keystroke
to interrupt autoboot.
diff --git a/board/solidrun/clearfog/clearfog.c b/board/solidrun/clearfog/clearfog.c
index 2dbd071..74a1b46 100644
--- a/board/solidrun/clearfog/clearfog.c
+++ b/board/solidrun/clearfog/clearfog.c
@@ -227,6 +227,74 @@
return 0;
}
+#define TLC59XXX_REG_MODE1 0x00
+#define TLC59XXX_REG_MODE2 0x01
+#define TLC59XXX_REG_PWM(LED) (LED + 0x02)
+#define TLC59XXX_REG_GRPPWM 0x12
+#define TLC59XXX_REG_GRPFREQ 0x13
+#define TLC59XXX_REG_LEDOUT0 0x14
+#define TLC59XXX_REG_LEDOUT1 0x15
+#define TLC59XXX_REG_LEDOUT2 0x16
+#define TLC59XXX_REG_LEDOUT3 0x17
+#define TLC59XXX_CHIP_RESET_ADDR 0x6b
+#define TLC59XXX_RESET_BYTE_0 0xa5
+#define TLC59XXX_RESET_BYTE_1 0x5a
+#define CLA_LED_CHIP_ADDR 0x60
+#define CLA_LED_STATUS_RED 8
+#define CLA_LED_STATUS_GREEN 9
+#define CLA_LED_STATUS_BLUE 10
+
+struct cla_led_config {
+ u8 reg;
+ u8 val;
+};
+
+static struct cla_led_config led_reset_config[] = {
+ { TLC59XXX_RESET_BYTE_0, TLC59XXX_RESET_BYTE_1 },
+};
+
+static struct cla_led_config led_config[] = {
+ { TLC59XXX_REG_MODE1, 0x01 }, /* enable oscillator */
+ { TLC59XXX_REG_MODE2, 0x20 }, /* DMBLINK */
+ { TLC59XXX_REG_GRPPWM, 0x40 }, /* 25% duty cycle */
+ { TLC59XXX_REG_GRPFREQ, 0x03 }, /* very fast blinking */
+ { TLC59XXX_REG_PWM(CLA_LED_STATUS_RED), 0x80 }, /* 50% brightness */
+ { TLC59XXX_REG_PWM(CLA_LED_STATUS_GREEN), 0x80 }, /* 50% brightness */
+ { TLC59XXX_REG_PWM(CLA_LED_STATUS_BLUE), 0x80 }, /* 50% brightness */
+ { TLC59XXX_REG_LEDOUT2, 0x3f }, /* LEDs #8, 9, 10: mode 0b11 -> group blinking */
+};
+
+int cla_setup_leds(void)
+{
+ struct udevice *bus, *dev;
+
+ if (uclass_get_device_by_seq(UCLASS_I2C, 1, &bus)) {
+ puts("Cannot find I2C bus for LEDs\n");
+ return 1;
+ }
+
+ if (i2c_get_chip(bus, TLC59XXX_CHIP_RESET_ADDR, 1, &dev)) {
+ puts("Cannot request I2C chip for SWRST\n");
+ return 1;
+ }
+ if (dm_i2c_write(dev, led_reset_config[0].reg, &led_reset_config[0].val, 1)) {
+ puts("LED reset failed\n");
+ return 1;
+ }
+
+ if (i2c_get_chip(bus, CLA_LED_CHIP_ADDR, 1, &dev)) {
+ puts("Cannot request I2C chip for LEDs\n");
+ return 1;
+ }
+ for (int i = 0; i < ARRAY_SIZE(led_config); i++) {
+ if (dm_i2c_write(dev, led_config[i].reg, &led_config[i].val, 1)) {
+ printf("LED config operation #%d failed\n", i);
+ return 1;
+ }
+ }
+ return 0;
+}
+
int board_init(void)
{
/* Address of boot parameters */
@@ -243,6 +311,8 @@
setbits_le32(MVEBU_GPIO0_BASE + 0x0, BIT(19));
mdelay(10);
+ cla_setup_leds();
+
return 0;
}