From: Trent Piepho Date: Wed, 22 May 2019 18:43:25 +0000 (+0000) Subject: net: phy: dp83867: IO impedance is not dependent on RGMII delay X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=27708eb5481b7b00540028d0ac2b56dfa95a2df7;p=openwrt%2Fstaging%2Fblogic.git net: phy: dp83867: IO impedance is not dependent on RGMII delay The driver would only set the IO impedance value when RGMII internal delays were enabled. There is no reason for this. Move the IO impedance block out of the RGMII delay block. Cc: Andrew Lunn Cc: Florian Fainelli Cc: Heiner Kallweit Signed-off-by: Trent Piepho Reviewed-by: Andrew Lunn Signed-off-by: David S. Miller --- diff --git a/drivers/net/phy/dp83867.c b/drivers/net/phy/dp83867.c index 59051b0f5be9..5ece153aa9c3 100644 --- a/drivers/net/phy/dp83867.c +++ b/drivers/net/phy/dp83867.c @@ -75,8 +75,7 @@ #define DP83867_RGMII_RX_CLK_DELAY_SHIFT 0 /* IO_MUX_CFG bits */ -#define DP83867_IO_MUX_CFG_IO_IMPEDANCE_CTRL 0x1f - +#define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MASK 0x1f #define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MAX 0x0 #define DP83867_IO_MUX_CFG_IO_IMPEDANCE_MIN 0x1f #define DP83867_IO_MUX_CFG_CLK_O_DISABLE BIT(6) @@ -162,8 +161,6 @@ static int dp83867_of_init(struct phy_device *phydev) if (!of_node) return -ENODEV; - dp83867->io_impedance = -EINVAL; - /* Optional configuration */ ret = of_property_read_u32(of_node, "ti,clk-output-sel", &dp83867->clk_output_sel); @@ -185,6 +182,8 @@ static int dp83867_of_init(struct phy_device *phydev) dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MAX; else if (of_property_read_bool(of_node, "ti,min-output-impedance")) dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MIN; + else + dp83867->io_impedance = -1; /* leave at default */ dp83867->rxctrl_strap_quirk = of_property_read_bool(of_node, "ti,dp83867-rxctrl-strap-quirk"); @@ -333,14 +332,14 @@ static int dp83867_config_init(struct phy_device *phydev) phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_RGMIIDCTL, delay); - - if (dp83867->io_impedance >= 0) - phy_modify_mmd(phydev, DP83867_DEVADDR, DP83867_IO_MUX_CFG, - DP83867_IO_MUX_CFG_IO_IMPEDANCE_CTRL, - dp83867->io_impedance & - DP83867_IO_MUX_CFG_IO_IMPEDANCE_CTRL); } + /* If specified, set io impedance */ + if (dp83867->io_impedance >= 0) + phy_modify_mmd(phydev, DP83867_DEVADDR, DP83867_IO_MUX_CFG, + DP83867_IO_MUX_CFG_IO_IMPEDANCE_MASK, + dp83867->io_impedance); + /* Enable Interrupt output INT_OE in CFG3 register */ if (phy_interrupt_is_valid(phydev)) { val = phy_read(phydev, DP83867_CFG3);