[PATCH net-next 06/18] net: ethernet: stmmac: dwmac-sun8i: Enable control of loopback

From: Jose Abreu
Date: Thu May 23 2019 - 03:41:00 EST


From: Corentin Labbe <clabbe@xxxxxxxxxxxx>

This patch enable use of set_mac_loopback in dwmac-sun8i

Signed-off-by: Corentin Labbe <clabbe@xxxxxxxxxxxx>
Signed-off-by: Jose Abreu <joabreu@xxxxxxxxxxxx>
Cc: Joao Pinto <jpinto@xxxxxxxxxxxx>
Cc: David S. Miller <davem@xxxxxxxxxxxxx>
Cc: Giuseppe Cavallaro <peppe.cavallaro@xxxxxx>
Cc: Alexandre Torgue <alexandre.torgue@xxxxxx>
---
drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
index 195669f550f0..f7ff5858e522 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
@@ -986,6 +986,18 @@ static void sun8i_dwmac_exit(struct platform_device *pdev, void *priv)
regulator_disable(gmac->regulator);
}

+static void sun8i_dwmac_set_mac_loopback(void __iomem *ioaddr, bool enable)
+{
+ u32 value = readl(ioaddr + EMAC_BASIC_CTL0);
+
+ if (enable)
+ value |= EMAC_LOOPBACK;
+ else
+ value &= ~EMAC_LOOPBACK;
+
+ writel(value, ioaddr + EMAC_BASIC_CTL0);
+}
+
static const struct stmmac_ops sun8i_dwmac_ops = {
.core_init = sun8i_dwmac_core_init,
.set_mac = sun8i_dwmac_set_mac,
@@ -995,6 +1007,7 @@ static const struct stmmac_ops sun8i_dwmac_ops = {
.flow_ctrl = sun8i_dwmac_flow_ctrl,
.set_umac_addr = sun8i_dwmac_set_umac_addr,
.get_umac_addr = sun8i_dwmac_get_umac_addr,
+ .set_mac_loopback = sun8i_dwmac_set_mac_loopback,
};

static struct mac_device_info *sun8i_dwmac_setup(void *ppriv)
--
2.7.4