[PATCH v2] ata: sata_mv: enable SoC SATA LED presence indication

[Carlos Junior <cjuniorfox@gmail.com>]

Enable the SoC SATA LED controller in mv_soc_enable_leds().

Set the LED controller enable and device presence multiplexing bits
in the SoC SATA host-controller register. This enables SATA device
presence indication on boards using the SoC SATA controller.

Signed-off-by: Carlos Junior <cjuniorfox@gmail.com>
---
Changes in v2:
- Do not initialize the SoC SATA LED blink bit; leave it to the
  existing NCQ LED blink handling.

 drivers/ata/sata_mv.c | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
index d260f04e6..52e33485b 100644
--- a/drivers/ata/sata_mv.c
+++ b/drivers/ata/sata_mv.c
@@ -252,6 +252,7 @@ enum {
 	SOC_LED_CTRL_BLINK	= (1 << 0),	/* Active LED blink */
 	SOC_LED_CTRL_ACT_PRESENCE = (1 << 2),	/* Multiplex dev presence */
 						/*  with dev activity LED */
+	SOC_LED_CTRL_ENABLE	= (1 << 3),	/* Enable SATA LED control */
 
 	/* Shadow block registers */
 	SHD_BLK			= 0x100,
@@ -3382,12 +3383,20 @@ static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
 	writel(m2, port_mmio + PHY_MODE2);
 }
 
-/* TODO: use the generic LED interface to configure the SATA Presence */
-/* & Acitivy LEDs on the board */
+/*
+ * Enable the SoC SATA LED controller and device presence
+ * indication on the board's SATA LEDs.
+ */
 static void mv_soc_enable_leds(struct mv_host_priv *hpriv,
 				      void __iomem *mmio)
 {
-	return;
+	void __iomem *hc_mmio;
+
+	hc_mmio = mv_hc_base(mmio, 0);
+
+	writel(SOC_LED_CTRL_ENABLE |
+		SOC_LED_CTRL_ACT_PRESENCE,
+		hc_mmio + SOC_LED_CTRL);
 }
 
 static void mv_soc_read_preamp(struct mv_host_priv *hpriv, int idx,
-- 
2.54.0