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net: sun8i_emac: Add CLK and RESET support

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Add CLK and RESET support for sun8i_emac driver to
enable TX clock and reset pins via CLK and RESET
framework.

Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Lothar Felten <lothar.felten@gmail.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 00:26:58 +05:30
parent 695f6043c9
commit d3a2c0586e
1 changed files with 42 additions and 15 deletions
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57
drivers/net/sun8i_emac.c
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@ -14,12 +14,14 @@
#include <asm/arch/clock.h>
#include <asm/arch/gpio.h>
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <fdt_support.h>
#include <linux/err.h>
#include <malloc.h>
#include <miiphy.h>
#include <net.h>
#include <reset.h>
#include <dt-bindings/pinctrl/sun4i-a10.h>
#ifdef CONFIG_DM_GPIO
#include <asm-generic/gpio.h>
@ -135,6 +137,8 @@ struct emac_eth_dev {
phys_addr_t sysctl_reg;
struct phy_device *phydev;
struct mii_dev *bus;
struct clk tx_clk;
struct reset_ctl tx_rst;
#ifdef CONFIG_DM_GPIO
struct gpio_desc reset_gpio;
#endif
@ -647,9 +651,24 @@ static int sun8i_eth_write_hwaddr(struct udevice *dev)
return _sun8i_write_hwaddr(priv, pdata->enetaddr);
}
static void sun8i_emac_board_setup(struct emac_eth_dev *priv)
static int sun8i_emac_board_setup(struct emac_eth_dev *priv)
{
struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
int ret;
ret = clk_enable(&priv->tx_clk);
if (ret) {
dev_err(dev, "failed to enable TX clock\n");
return ret;
}
if (reset_valid(&priv->tx_rst)) {
ret = reset_deassert(&priv->tx_rst);
if (ret) {
dev_err(dev, "failed to deassert TX reset\n");
goto err_tx_clk;
}
}
if (priv->variant == H3_EMAC) {
/* Only H3/H5 have clock controls for internal EPHY */
@ -664,19 +683,11 @@ static void sun8i_emac_board_setup(struct emac_eth_dev *priv)
}
}
if (priv->variant == R40_GMAC) {
/* Set clock gating for emac */
setbits_le32(&ccm->ahb_reset1_cfg, BIT(AHB_RESET_OFFSET_GMAC));
return 0;
/* De-assert EMAC */
setbits_le32(&ccm->ahb_gate1, BIT(AHB_GATE_OFFSET_GMAC));
} else {
/* Set clock gating for emac */
setbits_le32(&ccm->ahb_gate0, BIT(AHB_GATE_OFFSET_GMAC));
/* De-assert EMAC */
setbits_le32(&ccm->ahb_reset0_cfg, BIT(AHB_RESET_OFFSET_GMAC));
}
err_tx_clk:
clk_disable(&priv->tx_clk);
return ret;
}
#if defined(CONFIG_DM_GPIO)
@ -803,10 +814,14 @@ static int sun8i_emac_eth_probe(struct udevice *dev)
struct sun8i_eth_pdata *sun8i_pdata = dev_get_platdata(dev);
struct eth_pdata *pdata = &sun8i_pdata->eth_pdata;
struct emac_eth_dev *priv = dev_get_priv(dev);
int ret;
priv->mac_reg = (void *)pdata->iobase;
sun8i_emac_board_setup(priv);
ret = sun8i_emac_board_setup(priv);
if (ret)
return ret;
sun8i_emac_set_syscon(sun8i_pdata, priv);
sun8i_mdio_init(dev->name, dev);
@ -835,8 +850,8 @@ static int sun8i_emac_eth_ofdata_to_platdata(struct udevice *dev)
int offset = 0;
#ifdef CONFIG_DM_GPIO
int reset_flags = GPIOD_IS_OUT;
int ret = 0;
#endif
int ret;
pdata->iobase = devfdt_get_addr(dev);
if (pdata->iobase == FDT_ADDR_T_NONE) {
@ -851,6 +866,18 @@ static int sun8i_emac_eth_ofdata_to_platdata(struct udevice *dev)
return -EINVAL;
}
ret = clk_get_by_name(dev, "stmmaceth", &priv->tx_clk);
if (ret) {
dev_err(dev, "failed to get TX clock\n");
return ret;
}
ret = reset_get_by_name(dev, "stmmaceth", &priv->tx_rst);
if (ret && ret != -ENOENT) {
dev_err(dev, "failed to get TX reset\n");
return ret;
}
offset = fdtdec_lookup_phandle(gd->fdt_blob, node, "syscon");
if (offset < 0) {
debug("%s: cannot find syscon node\n", __func__);