[U-Boot] [PATCH v3 02/13] net: sunxi_emac: Add CLK support

[Jagan Teki]

Add CLk support for sunxi_emac to enable AHB_EMAC clock
via CLK framework.

Cc: Joe Hershberger <joe.hershberger at ni.com>
Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
---
 drivers/net/sunxi_emac.c | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/drivers/net/sunxi_emac.c b/drivers/net/sunxi_emac.c
index 8dbd3c50c1..9a5f7fd3c7 100644
--- a/drivers/net/sunxi_emac.c
+++ b/drivers/net/sunxi_emac.c
@@ -6,6 +6,7 @@
  */
 
 #include <common.h>
+#include <clk.h>
 #include <dm.h>
 #include <linux/err.h>
 #include <malloc.h>
@@ -157,6 +158,7 @@ struct sunxi_sramc_regs {
 
 struct emac_eth_dev {
 	struct emac_regs *regs;
+	struct clk clk;
 	struct mii_dev *bus;
 	struct phy_device *phydev;
 	int link_printed;
@@ -500,14 +502,12 @@ static int _sunxi_emac_eth_send(struct emac_eth_dev *priv, void *packet,
 	return 0;
 }
 
-static void sunxi_emac_board_setup(struct emac_eth_dev *priv)
+static int sunxi_emac_board_setup(struct emac_eth_dev *priv)
 {
-	struct sunxi_ccm_reg *const ccm =
-		(struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 	struct sunxi_sramc_regs *sram =
 		(struct sunxi_sramc_regs *)SUNXI_SRAMC_BASE;
 	struct emac_regs *regs = priv->regs;
-	int pin;
+	int pin, ret;
 
 	/* Map SRAM to EMAC */
 	setbits_le32(&sram->ctrl1, 0x5 << 2);
@@ -517,10 +517,16 @@ static void sunxi_emac_board_setup(struct emac_eth_dev *priv)
 		sunxi_gpio_set_cfgpin(pin, SUNXI_GPA_EMAC);
 
 	/* Set up clock gating */
-	setbits_le32(&ccm->ahb_gate0, 0x1 << AHB_GATE_OFFSET_EMAC);
+	ret = clk_enable(&priv->clk);
+	if (ret) {
+		dev_err(dev, "failed to enable emac clock\n");
+		return ret;
+	}
 
 	/* Set MII clock */
 	clrsetbits_le32(&regs->mac_mcfg, 0xf << 2, 0xd << 2);
+
+	return 0;
 }
 
 static int sunxi_emac_eth_start(struct udevice *dev)
@@ -557,9 +563,19 @@ static int sunxi_emac_eth_probe(struct udevice *dev)
 {
 	struct eth_pdata *pdata = dev_get_platdata(dev);
 	struct emac_eth_dev *priv = dev_get_priv(dev);
+	int ret;
 
 	priv->regs = (struct emac_regs *)pdata->iobase;
-	sunxi_emac_board_setup(priv);
+
+	ret = clk_get_by_index(dev, 0, &priv->clk);
+	if (ret) {
+		dev_err(dev, "failed to get emac clock\n");
+		return ret;
+	}
+
+	ret = sunxi_emac_board_setup(priv);
+	if (ret)
+		return ret;
 
 	return sunxi_emac_init_phy(priv, dev);
 }
-- 
2.18.0.321.gffc6fa0e3