Commit 98f99288 authored by Russell King (Oracle)'s avatar Russell King (Oracle) Committed by Jakub Kicinski
Browse files

net: stmmac: qcom-ethqos: use rgmii_clock() to set the link clock 



The link clock operates at twice the RGMII clock rate. Therefore, we
can use the rgmii_clock() helper to set this clock rate.

Signed-off-by: default avatarRussell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: default avatarVinod Koul <vkoul@kernel.org>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/E1tlRMK-004Vsx-Ss@rmk-PC.armlinux.org.uk


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent e13b6da7

drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c

+5 −18
Original line number Diff line number Diff line
@@ -169,30 +169,17 @@ static void rgmii_dump(void *priv) 
		rgmii_readl(ethqos, EMAC_SYSTEM_LOW_POWER_DEBUG));

}



/* Clock rates */

#define RGMII_1000_NOM_CLK_FREQ			(250 * 1000 * 1000UL)

#define RGMII_ID_MODE_100_LOW_SVS_CLK_FREQ	 (50 * 1000 * 1000UL)

#define RGMII_ID_MODE_10_LOW_SVS_CLK_FREQ	  (5 * 1000 * 1000UL)



static void

ethqos_update_link_clk(struct qcom_ethqos *ethqos, int speed)

{

	long rate;



	if (!phy_interface_mode_is_rgmii(ethqos->phy_mode))

		return;



	switch (speed) {

	case SPEED_1000:

		ethqos->link_clk_rate =  RGMII_1000_NOM_CLK_FREQ;

		break;



	case SPEED_100:

		ethqos->link_clk_rate =  RGMII_ID_MODE_100_LOW_SVS_CLK_FREQ;

		break;



	case SPEED_10:

		ethqos->link_clk_rate =  RGMII_ID_MODE_10_LOW_SVS_CLK_FREQ;

		break;

	}

	rate = rgmii_clock(speed);

	if (rate > 0)

		ethqos->link_clk_rate = rate * 2;



	clk_set_rate(ethqos->link_clk, ethqos->link_clk_rate);

}