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Commit 9708fb63 authored by Wadim Egorov's avatar Wadim Egorov Committed by David S. Miller
Browse files

net: phy: dp83867: Add binding for the CLK_OUT pin muxing option 



The DP83867 has a muxing option for the CLK_OUT pin. It is possible
to set CLK_OUT for different channels.
Create a binding to select a specific clock for CLK_OUT pin.

Signed-off-by: default avatarWadim Egorov <w.egorov@phytec.de>
Signed-off-by: default avatarDaniel Schultz <d.schultz@phytec.de>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 37c64cf6

drivers/net/phy/dp83867.c

+19 −0
Original line number Diff line number Diff line
@@ -75,6 +75,8 @@ 


#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_SEL_MASK	(0x1f << 8)

#define DP83867_IO_MUX_CFG_CLK_O_SEL_SHIFT	8



/* CFG4 bits */

#define DP83867_CFG4_PORT_MIRROR_EN              BIT(0)
@@ -92,6 +94,7 @@ struct dp83867_private { 
	int io_impedance;

	int port_mirroring;

	bool rxctrl_strap_quirk;

	int clk_output_sel;

};



static int dp83867_ack_interrupt(struct phy_device *phydev)
@@ -160,6 +163,14 @@ static int dp83867_of_init(struct phy_device *phydev) 
	dp83867->io_impedance = -EINVAL;



	/* Optional configuration */

	ret = of_property_read_u32(of_node, "ti,clk-output-sel",

				   &dp83867->clk_output_sel);

	if (ret || dp83867->clk_output_sel > DP83867_CLK_O_SEL_REF_CLK)

		/* Keep the default value if ti,clk-output-sel is not set

		 * or too high

		 */

		dp83867->clk_output_sel = DP83867_CLK_O_SEL_REF_CLK;



	if (of_property_read_bool(of_node, "ti,max-output-impedance"))

		dp83867->io_impedance = DP83867_IO_MUX_CFG_IO_IMPEDANCE_MAX;

	else if (of_property_read_bool(of_node, "ti,min-output-impedance"))
@@ -295,6 +306,14 @@ static int dp83867_config_init(struct phy_device *phydev) 
	if (dp83867->port_mirroring != DP83867_PORT_MIRROING_KEEP)

		dp83867_config_port_mirroring(phydev);



	/* Clock output selection if muxing property is set */

	if (dp83867->clk_output_sel != DP83867_CLK_O_SEL_REF_CLK) {

		val = phy_read_mmd(phydev, DP83867_DEVADDR, DP83867_IO_MUX_CFG);

		val &= ~DP83867_IO_MUX_CFG_CLK_O_SEL_MASK;

		val |= (dp83867->clk_output_sel << DP83867_IO_MUX_CFG_CLK_O_SEL_SHIFT);

		phy_write_mmd(phydev, DP83867_DEVADDR, DP83867_IO_MUX_CFG, val);

	}



	return 0;

}

include/dt-bindings/net/ti-dp83867.h

+14 −0
Original line number Diff line number Diff line
@@ -42,4 +42,18 @@ 
#define	DP83867_RGMIIDCTL_3_75_NS	0xe

#define	DP83867_RGMIIDCTL_4_00_NS	0xf



/* IO_MUX_CFG - Clock output selection */

#define DP83867_CLK_O_SEL_CHN_A_RCLK		0x0

#define DP83867_CLK_O_SEL_CHN_B_RCLK		0x1

#define DP83867_CLK_O_SEL_CHN_C_RCLK		0x2

#define DP83867_CLK_O_SEL_CHN_D_RCLK		0x3

#define DP83867_CLK_O_SEL_CHN_A_RCLK_DIV5	0x4

#define DP83867_CLK_O_SEL_CHN_B_RCLK_DIV5	0x5

#define DP83867_CLK_O_SEL_CHN_C_RCLK_DIV5	0x6

#define DP83867_CLK_O_SEL_CHN_D_RCLK_DIV5	0x7

#define DP83867_CLK_O_SEL_CHN_A_TCLK		0x8

#define DP83867_CLK_O_SEL_CHN_B_TCLK		0x9

#define DP83867_CLK_O_SEL_CHN_C_TCLK		0xA

#define DP83867_CLK_O_SEL_CHN_D_TCLK		0xB

#define DP83867_CLK_O_SEL_REF_CLK		0xC

#endif