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net: sunxi_emac: Add CLK support

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

Cc: Joe Hershberger <joe.hershberger@ni.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Jagan Teki 2019-02-28 00:26:50 +05:30
parent 33685372cf
commit 0ed8eaf1de
1 changed files with 22 additions and 6 deletions
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28
drivers/net/sunxi_emac.c
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@ -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);
}