diff options
Diffstat (limited to 'drivers/net/mdio')
| -rw-r--r-- | drivers/net/mdio/Kconfig | 3 | ||||
| -rw-r--r-- | drivers/net/mdio/mdio-ipq4019.c | 45 | ||||
| -rw-r--r-- | drivers/net/mdio/mdio-mscc-miim.c | 3 |
3 files changed, 49 insertions, 2 deletions
diff --git a/drivers/net/mdio/Kconfig b/drivers/net/mdio/Kconfig index 99a6c13a11af..6da1fcb25847 100644 --- a/drivers/net/mdio/Kconfig +++ b/drivers/net/mdio/Kconfig @@ -169,9 +169,10 @@ config MDIO_OCTEON config MDIO_IPQ4019 tristate "Qualcomm IPQ4019 MDIO interface support" depends on HAS_IOMEM && OF_MDIO + depends on COMMON_CLK help This driver supports the MDIO interface found in Qualcomm - IPQ40xx series Soc-s. + IPQ40xx, IPQ60xx, IPQ807x and IPQ50xx series Soc-s. config MDIO_IPQ8064 tristate "Qualcomm IPQ8064 MDIO interface support" diff --git a/drivers/net/mdio/mdio-ipq4019.c b/drivers/net/mdio/mdio-ipq4019.c index 9cd71d896963..5f4cd24a0241 100644 --- a/drivers/net/mdio/mdio-ipq4019.c +++ b/drivers/net/mdio/mdio-ipq4019.c @@ -11,6 +11,7 @@ #include <linux/of_mdio.h> #include <linux/phy.h> #include <linux/platform_device.h> +#include <linux/clk.h> #define MDIO_MODE_REG 0x40 #define MDIO_ADDR_REG 0x44 @@ -31,8 +32,15 @@ #define IPQ4019_MDIO_TIMEOUT 10000 #define IPQ4019_MDIO_SLEEP 10 +/* MDIO clock source frequency is fixed to 100M */ +#define IPQ_MDIO_CLK_RATE 100000000 + +#define IPQ_PHY_SET_DELAY_US 100000 + struct ipq4019_mdio_data { void __iomem *membase; + void __iomem *eth_ldo_rdy; + struct clk *mdio_clk; }; static int ipq4019_mdio_wait_busy(struct mii_bus *bus) @@ -171,10 +179,35 @@ static int ipq4019_mdio_write(struct mii_bus *bus, int mii_id, int regnum, return 0; } +static int ipq_mdio_reset(struct mii_bus *bus) +{ + struct ipq4019_mdio_data *priv = bus->priv; + u32 val; + int ret; + + /* To indicate CMN_PLL that ethernet_ldo has been ready if platform resource 1 + * is specified in the device tree. + */ + if (priv->eth_ldo_rdy) { + val = readl(priv->eth_ldo_rdy); + val |= BIT(0); + writel(val, priv->eth_ldo_rdy); + fsleep(IPQ_PHY_SET_DELAY_US); + } + + /* Configure MDIO clock source frequency if clock is specified in the device tree */ + ret = clk_set_rate(priv->mdio_clk, IPQ_MDIO_CLK_RATE); + if (ret) + return ret; + + return clk_prepare_enable(priv->mdio_clk); +} + static int ipq4019_mdio_probe(struct platform_device *pdev) { struct ipq4019_mdio_data *priv; struct mii_bus *bus; + struct resource *res; int ret; bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*priv)); @@ -187,9 +220,20 @@ static int ipq4019_mdio_probe(struct platform_device *pdev) if (IS_ERR(priv->membase)) return PTR_ERR(priv->membase); + priv->mdio_clk = devm_clk_get_optional(&pdev->dev, "gcc_mdio_ahb_clk"); + if (IS_ERR(priv->mdio_clk)) + return PTR_ERR(priv->mdio_clk); + + /* The platform resource is provided on the chipset IPQ5018 */ + /* This resource is optional */ + res = platform_get_resource(pdev, IORESOURCE_MEM, 1); + if (res) + priv->eth_ldo_rdy = devm_ioremap_resource(&pdev->dev, res); + bus->name = "ipq4019_mdio"; bus->read = ipq4019_mdio_read; bus->write = ipq4019_mdio_write; + bus->reset = ipq_mdio_reset; bus->parent = &pdev->dev; snprintf(bus->id, MII_BUS_ID_SIZE, "%s%d", pdev->name, pdev->id); @@ -215,6 +259,7 @@ static int ipq4019_mdio_remove(struct platform_device *pdev) static const struct of_device_id ipq4019_mdio_dt_ids[] = { { .compatible = "qcom,ipq4019-mdio" }, + { .compatible = "qcom,ipq5018-mdio" }, { } }; MODULE_DEVICE_TABLE(of, ipq4019_mdio_dt_ids); diff --git a/drivers/net/mdio/mdio-mscc-miim.c b/drivers/net/mdio/mdio-mscc-miim.c index 2d67e12c8262..17f98f609ec8 100644 --- a/drivers/net/mdio/mdio-mscc-miim.c +++ b/drivers/net/mdio/mdio-mscc-miim.c @@ -134,9 +134,9 @@ static int mscc_miim_reset(struct mii_bus *bus) static int mscc_miim_probe(struct platform_device *pdev) { + struct mscc_miim_dev *dev; struct resource *res; struct mii_bus *bus; - struct mscc_miim_dev *dev; int ret; bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*dev)); @@ -157,6 +157,7 @@ static int mscc_miim_probe(struct platform_device *pdev) return PTR_ERR(dev->regs); } + /* This resource is optional */ res = platform_get_resource(pdev, IORESOURCE_MEM, 1); if (res) { dev->phy_regs = devm_ioremap_resource(&pdev->dev, res); |