[PATCH net-next 10/15] net: mvpp2: only update the XLG configuration when needed
From: Antoine Tenart <hidden>
Date: 2019-02-28 13:26:39
Also in:
lkml
Subsystem:
marvell mvpp2 ethernet driver, networking drivers, the rest · Maintainers:
Marcin Wojtas, Russell King, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
This patch improves the XLG configuration function, to only update the XLG configuration register when a change is needed. This helps not writing over and over the same XLG configuration each time phylink request the MAC to be configured. This mimics the GMAC configuration function. Signed-off-by: Antoine Tenart <redacted> --- drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-)
diff --git a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
index b27966355df9..59ee9e7545b0 100644
--- a/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c
+++ b/drivers/net/ethernet/marvell/mvpp2/mvpp2_main.c@@ -4506,10 +4506,11 @@ static void mvpp2_mac_an_restart(struct net_device *dev) static void mvpp2_xlg_config(struct mvpp2_port *port, unsigned int mode, const struct phylink_link_state *state) { - u32 ctrl0, ctrl4; + u32 old_ctrl0, ctrl0; + u32 old_ctrl4, ctrl4; - ctrl0 = readl(port->base + MVPP22_XLG_CTRL0_REG); - ctrl4 = readl(port->base + MVPP22_XLG_CTRL4_REG); + old_ctrl0 = ctrl0 = readl(port->base + MVPP22_XLG_CTRL0_REG); + old_ctrl4 = ctrl4 = readl(port->base + MVPP22_XLG_CTRL4_REG); if (state->pause & MLO_PAUSE_TX) ctrl0 |= MVPP22_XLG_CTRL0_TX_FLOW_CTRL_EN;
@@ -4525,8 +4526,10 @@ static void mvpp2_xlg_config(struct mvpp2_port *port, unsigned int mode, ctrl4 |= MVPP22_XLG_CTRL4_FWD_FC | MVPP22_XLG_CTRL4_FWD_PFC | MVPP22_XLG_CTRL4_EN_IDLE_CHECK; - writel(ctrl0, port->base + MVPP22_XLG_CTRL0_REG); - writel(ctrl4, port->base + MVPP22_XLG_CTRL4_REG); + if (old_ctrl0 != ctrl0) + writel(ctrl0, port->base + MVPP22_XLG_CTRL0_REG); + if (old_ctrl4 != ctrl4) + writel(ctrl4, port->base + MVPP22_XLG_CTRL4_REG); } static void mvpp2_gmac_config(struct mvpp2_port *port, unsigned int mode,
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2.20.1