[U-Boot] [PATCH 1/8] kmp204x: Add support for the unit LEDs

[Valentin Longchamp <valentin.longchamp@keymile.com>]

From: Stefan Bigler <stefan.bigler@keymile.com>

The unit LEDs are managed by the QRIO CPLD. This patch adds support for
accessing these LEDs in the QRIO.

The LEDs then are set to a correct boot state:
- UNIT-LED is red
- BOOT-LED is on.

Signed-off-by: Stefan Bigler <stefan.bigler@keymile.com>
Signed-off-by: Valentin Longchamp <valentin.longchamp@keymile.com>
---

 board/keymile/kmp204x/kmp204x.c |  3 +++
 board/keymile/kmp204x/kmp204x.h |  1 +
 board/keymile/kmp204x/qrio.c    | 14 ++++++++++++++
 3 files changed, 18 insertions(+)

diff --git a/board/keymile/kmp204x/kmp204x.c b/board/keymile/kmp204x/kmp204x.c
index 95a19cd..5fceedd 100644
--- a/board/keymile/kmp204x/kmp204x.c
+++ b/board/keymile/kmp204x/kmp204x.c
@@ -113,6 +113,9 @@ int board_early_init_r(void)
 	if (ret)
 		printf("error triggering PCIe FPGA config\n");
 
+	/* enable the Unit LED (red) & Boot LED (on) */
+	qrio_set_leds();
+
 	return ret;
 }
 
diff --git a/board/keymile/kmp204x/kmp204x.h b/board/keymile/kmp204x/kmp204x.h
index 0267596..34de27e 100644
--- a/board/keymile/kmp204x/kmp204x.h
+++ b/board/keymile/kmp204x/kmp204x.h
@@ -21,5 +21,6 @@ void qrio_gpio_direction_input(u8 port_off, u8 gpio_nr);
 
 void qrio_prst(u8 bit, bool en, bool wden);
 void qrio_prstcfg(u8 bit, u8 mode);
+void qrio_set_leds(void);
 
 void pci_of_setup(void *blob, bd_t *bd);
diff --git a/board/keymile/kmp204x/qrio.c b/board/keymile/kmp204x/qrio.c
index 49f9aa2..11949f4 100644
--- a/board/keymile/kmp204x/qrio.c
+++ b/board/keymile/kmp204x/qrio.c
@@ -144,3 +144,17 @@ void qrio_prstcfg(u8 bit, u8 mode)
 
 	out_be32(qrio_base + PRSTCFG_OFF, prstcfg);
 }
+
+#define CTRLH_OFF		0x02
+#define CTRLH_WRL_BOOT		0x01
+#define CTRLH_WRL_UNITRUN	0x02
+
+void qrio_set_leds(void)
+{
+	u8 ctrlh;
+	void __iomem *qrio_base = (void *)CONFIG_SYS_QRIO_BASE;
+	/* set UNIT LED to RED and BOOT LED to ON */
+	ctrlh = in_8(qrio_base + CTRLH_OFF);
+	ctrlh |= (CTRLH_WRL_BOOT | CTRLH_WRL_UNITRUN);
+	out_8(qrio_base + CTRLH_OFF, ctrlh);
+}
-- 
1.8.0.1