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authorSean Wang <sean.wang@mediatek.com>2016-09-14 23:13:20 +0800
committerDavid S. Miller <davem@davemloft.net>2016-09-16 02:22:58 -0400
commit2a8307aab373684e8c1067695310db4438621868 (patch)
tree7fb1a20fb8245399e14674b0a53038bc780198d5 /drivers/net/ethernet/mediatek/mtk_eth_soc.c
parent9ea4d311509fc11128a464d86745beeafd575051 (diff)
downloadlinux-2a8307aab373684e8c1067695310db4438621868.tar.bz2
net: ethernet: mediatek: add more resets for internal ethernet circuit block
struct mtk_eth has already contained struct regmap ethsys pointer to the address range of the internal circuit reset, so we reuse it to reset more internal blocks on ethernet hardware such as packet processing engine (PPE) and frame engine (FE) instead of rstc which deals with FE only. Signed-off-by: Sean Wang <sean.wang@mediatek.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mediatek/mtk_eth_soc.c')
-rw-r--r--drivers/net/ethernet/mediatek/mtk_eth_soc.c27
1 files changed, 15 insertions, 12 deletions
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 7b2f5edf274a..4574332de1f6 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -1414,6 +1414,19 @@ static int mtk_stop(struct net_device *dev)
return 0;
}
+static void ethsys_reset(struct mtk_eth *eth, u32 reset_bits)
+{
+ regmap_update_bits(eth->ethsys, ETHSYS_RSTCTRL,
+ reset_bits,
+ reset_bits);
+
+ usleep_range(1000, 1100);
+ regmap_update_bits(eth->ethsys, ETHSYS_RSTCTRL,
+ reset_bits,
+ ~reset_bits);
+ mdelay(10);
+}
+
static int mtk_hw_init(struct mtk_eth *eth)
{
int i, val;
@@ -1428,12 +1441,8 @@ static int mtk_hw_init(struct mtk_eth *eth)
clk_prepare_enable(eth->clks[MTK_CLK_ESW]);
clk_prepare_enable(eth->clks[MTK_CLK_GP1]);
clk_prepare_enable(eth->clks[MTK_CLK_GP2]);
-
- /* reset the frame engine */
- reset_control_assert(eth->rstc);
- usleep_range(10, 20);
- reset_control_deassert(eth->rstc);
- usleep_range(10, 20);
+ ethsys_reset(eth, RSTCTRL_FE);
+ ethsys_reset(eth, RSTCTRL_PPE);
regmap_read(eth->ethsys, ETHSYS_SYSCFG0, &val);
for (i = 0; i < MTK_MAC_COUNT; i++) {
@@ -1896,12 +1905,6 @@ static int mtk_probe(struct platform_device *pdev)
return PTR_ERR(eth->pctl);
}
- eth->rstc = devm_reset_control_get(&pdev->dev, "eth");
- if (IS_ERR(eth->rstc)) {
- dev_err(&pdev->dev, "no eth reset found\n");
- return PTR_ERR(eth->rstc);
- }
-
for (i = 0; i < 3; i++) {
eth->irq[i] = platform_get_irq(pdev, i);
if (eth->irq[i] < 0) {