From 28f0ccb9958f54d9f4e7ebcf09b400304d8ba7cb Mon Sep 17 00:00:00 2001 From: Grygorii Strashko Date: Fri, 24 Jun 2016 21:23:49 +0300 Subject: [PATCH] drivers: net: davinci_mdio: split reset function on init_clk and enable The Davinci MDIO MDIO_CONTROL.CLKDIV can be calculated only once during probe, hence split __davinci_mdio_reset() on davinci_mdio_init_clk() and davinci_mdio_enable(). Initialize and save CLKDIV in .probe(). Then just use saved value. Signed-off-by: Grygorii Strashko Signed-off-by: David S. Miller --- drivers/net/ethernet/ti/davinci_mdio.c | 21 ++++++++++++++------- 1 file changed, 14 insertions(+), 7 deletions(-) diff --git a/drivers/net/ethernet/ti/davinci_mdio.c b/drivers/net/ethernet/ti/davinci_mdio.c index b6d00590abfc..b206fd388448 100644 --- a/drivers/net/ethernet/ti/davinci_mdio.c +++ b/drivers/net/ethernet/ti/davinci_mdio.c @@ -98,9 +98,10 @@ struct davinci_mdio_data { * if MDIO bus is registered from DT. */ bool skip_scan; + u32 clk_div; }; -static void __davinci_mdio_reset(struct davinci_mdio_data *data) +static void davinci_mdio_init_clk(struct davinci_mdio_data *data) { u32 mdio_in, div, mdio_out_khz, access_time; @@ -109,9 +110,7 @@ static void __davinci_mdio_reset(struct davinci_mdio_data *data) if (div > CONTROL_MAX_DIV) div = CONTROL_MAX_DIV; - /* set enable and clock divider */ - __raw_writel(div | CONTROL_ENABLE, &data->regs->control); - + data->clk_div = div; /* * One mdio transaction consists of: * 32 bits of preamble @@ -132,12 +131,18 @@ static void __davinci_mdio_reset(struct davinci_mdio_data *data) data->access_time = 1; } +static void davinci_mdio_enable(struct davinci_mdio_data *data) +{ + /* set enable and clock divider */ + __raw_writel(data->clk_div | CONTROL_ENABLE, &data->regs->control); +} + static int davinci_mdio_reset(struct mii_bus *bus) { struct davinci_mdio_data *data = bus->priv; u32 phy_mask, ver; - __davinci_mdio_reset(data); + davinci_mdio_enable(data); /* wait for scan logic to settle */ msleep(PHY_MAX_ADDR * data->access_time); @@ -188,7 +193,7 @@ static inline int wait_for_user_access(struct davinci_mdio_data *data) * operation */ dev_warn(data->dev, "resetting idled controller\n"); - __davinci_mdio_reset(data); + davinci_mdio_enable(data); return -EAGAIN; } @@ -350,6 +355,8 @@ static int davinci_mdio_probe(struct platform_device *pdev) if (IS_ERR(data->regs)) return PTR_ERR(data->regs); + davinci_mdio_init_clk(data); + pm_runtime_enable(&pdev->dev); pm_runtime_get_sync(&pdev->dev); @@ -425,7 +432,7 @@ static int davinci_mdio_resume(struct device *dev) pinctrl_pm_select_default_state(dev); /* restart the scan state machine */ - __davinci_mdio_reset(data); + davinci_mdio_enable(data); return 0; } -- 2.20.1