Merge branch 'dsa-next'

Florian Fainelli says:

====================
net: dsa: bcm_sf2: GPHY power down

This patch series implement GPHY power up and down in the SF2 switch
driver in order to conserve power whenever possible (e.g: port is brought
down or unused during Wake-on-LAN).
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 56 insertions, 12 deletions

diff --git a/drivers/net/dsa/bcm_sf2.c b/drivers/net/dsa/bcm_sf2.c
index 09f6b3cc1f66..4daffb284931 100644
--- a/drivers/net/dsa/bcm_sf2.c
+++ b/drivers/net/dsa/bcm_sf2.c
@@ -233,6 +233,35 @@ static void bcm_sf2_eee_enable_set(struct dsa_switch *ds, int port, bool enable)
 	core_writel(priv, reg, CORE_EEE_EN_CTRL);
 }
 
+static void bcm_sf2_gphy_enable_set(struct dsa_switch *ds, bool enable)
+{
+	struct bcm_sf2_priv *priv = ds_to_priv(ds);
+	u32 reg;
+
+	reg = reg_readl(priv, REG_SPHY_CNTRL);
+	if (enable) {
+		reg |= PHY_RESET;
+		reg &= ~(EXT_PWR_DOWN | IDDQ_BIAS | CK25_DIS);
+		reg_writel(priv, reg, REG_SPHY_CNTRL);
+		udelay(21);
+		reg = reg_readl(priv, REG_SPHY_CNTRL);
+		reg &= ~PHY_RESET;
+	} else {
+		reg |= EXT_PWR_DOWN | IDDQ_BIAS | PHY_RESET;
+		reg_writel(priv, reg, REG_SPHY_CNTRL);
+		mdelay(1);
+		reg |= CK25_DIS;
+	}
+	reg_writel(priv, reg, REG_SPHY_CNTRL);
+
+	/* Use PHY-driven LED signaling */
+	if (!enable) {
+		reg = reg_readl(priv, REG_LED_CNTRL(0));
+		reg |= SPDLNK_SRC_SEL;
+		reg_writel(priv, reg, REG_LED_CNTRL(0));
+	}
+}
+
 static int bcm_sf2_port_setup(struct dsa_switch *ds, int port,
 			      struct phy_device *phy)
 {
@@ -248,6 +277,24 @@ static int bcm_sf2_port_setup(struct dsa_switch *ds, int port,
 	/* Clear the Rx and Tx disable bits and set to no spanning tree */
 	core_writel(priv, 0, CORE_G_PCTL_PORT(port));
 
+	/* Re-enable the GPHY and re-apply workarounds */
+	if (port == 0 && priv->hw_params.num_gphy == 1) {
+		bcm_sf2_gphy_enable_set(ds, true);
+		if (phy) {
+			/* if phy_stop() has been called before, phy
+			 * will be in halted state, and phy_start()
+			 * will call resume.
+			 *
+			 * the resume path does not configure back
+			 * autoneg settings, and since we hard reset
+			 * the phy manually here, we need to reset the
+			 * state machine also.
+			 */
+			phy->state = PHY_READY;
+			phy_init_hw(phy);
+		}
+	}
+
 	/* Enable port 7 interrupts to get notified */
 	if (port == 7)
 		intrl2_1_mask_clear(priv, P_IRQ_MASK(P7_IRQ_OFF));
@@ -281,6 +328,9 @@ static void bcm_sf2_port_disable(struct dsa_switch *ds, int port,
 		intrl2_1_writel(priv, P_IRQ_MASK(P7_IRQ_OFF), INTRL2_CPU_CLEAR);
 	}
 
+	if (port == 0 && priv->hw_params.num_gphy == 1)
+		bcm_sf2_gphy_enable_set(ds, false);
+
 	if (dsa_is_cpu_port(ds, port))
 		off = CORE_IMP_CTL;
 	else
@@ -771,7 +821,6 @@ static int bcm_sf2_sw_resume(struct dsa_switch *ds)
 {
 	struct bcm_sf2_priv *priv = ds_to_priv(ds);
 	unsigned int port;
-	u32 reg;
 	int ret;
 
 	ret = bcm_sf2_sw_rst(priv);
@@ -780,17 +829,8 @@ static int bcm_sf2_sw_resume(struct dsa_switch *ds)
 		return ret;
 	}
 
-	/* Reinitialize the single GPHY */
-	if (priv->hw_params.num_gphy == 1) {
-		reg = reg_readl(priv, REG_SPHY_CNTRL);
-		reg |= PHY_RESET;
-		reg &= ~(EXT_PWR_DOWN | IDDQ_BIAS);
-		reg_writel(priv, reg, REG_SPHY_CNTRL);
-		udelay(21);
-		reg = reg_readl(priv, REG_SPHY_CNTRL);
-		reg &= ~PHY_RESET;
-		reg_writel(priv, reg, REG_SPHY_CNTRL);
-	}
+	if (priv->hw_params.num_gphy == 1)
+		bcm_sf2_gphy_enable_set(ds, true);
 
 	for (port = 0; port < DSA_MAX_PORTS; port++) {
 		if ((1 << port) & ds->phys_port_mask)
diff --git a/drivers/net/dsa/bcm_sf2_regs.h b/drivers/net/dsa/bcm_sf2_regs.h
index 1bb49cb699ab..cabdfa5e217a 100644
--- a/drivers/net/dsa/bcm_sf2_regs.h
+++ b/drivers/net/dsa/bcm_sf2_regs.h
@@ -61,6 +61,10 @@
 #define  LPI_COUNT_SHIFT		9
 #define  LPI_COUNT_MASK			0x3F
 
+#define REG_LED_CNTRL_BASE		0x90
+#define REG_LED_CNTRL(x)		(REG_LED_CNTRL_BASE + (x) * 4)
+#define  SPDLNK_SRC_SEL			(1 << 24)
+
 /* Register set relative to 'INTRL2_0' and 'INTRL2_1' */
 #define INTRL2_CPU_STATUS		0x00
 #define INTRL2_CPU_SET			0x04