From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To: davem@davemloft.net, kuba@kernel.org,
linux-amlogic@lists.infradead.org, devicetree@vger.kernel.org,
robh+dt@kernel.org, netdev@vger.kernel.org
Cc: jianxin.pan@amlogic.com, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, khilman@baylibre.com,
narmstrong@baylibre.com, jbrunet@baylibre.com, andrew@lunn.ch,
f.fainelli@gmail.com,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Subject: [PATCH RFC v2 4/5] net: stmmac: dwmac-meson8b: move RGMII delays into a separate function
Date: Sun, 15 Nov 2020 19:52:09 +0100 [thread overview]
Message-ID: <20201115185210.573739-5-martin.blumenstingl@googlemail.com> (raw)
In-Reply-To: <20201115185210.573739-1-martin.blumenstingl@googlemail.com>
Newer SoCs starting with the Amlogic Meson G12A have more a precise
RGMII RX delay configuration register. This means more complexity in the
code. Extract the existing RGMII delay configuration code into a
separate function to make it easier to read/understand even when adding
more logic in the future.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
index 03fce678b9f5..353fe0f53620 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
@@ -268,7 +268,7 @@ static int meson8b_devm_clk_prepare_enable(struct meson8b_dwmac *dwmac,
return 0;
}
-static int meson8b_init_prg_eth(struct meson8b_dwmac *dwmac)
+static int meson8b_init_rgmii_delays(struct meson8b_dwmac *dwmac)
{
u32 tx_dly_config, rx_dly_config, delay_config;
int ret;
@@ -323,6 +323,13 @@ static int meson8b_init_prg_eth(struct meson8b_dwmac *dwmac)
PRG_ETH0_ADJ_DELAY | PRG_ETH0_ADJ_SKEW,
delay_config);
+ return 0;
+}
+
+static int meson8b_init_prg_eth(struct meson8b_dwmac *dwmac)
+{
+ int ret;
+
if (phy_interface_mode_is_rgmii(dwmac->phy_mode)) {
/* only relevant for RMII mode -> disable in RGMII mode */
meson8b_dwmac_mask_bits(dwmac, PRG_ETH0,
@@ -431,6 +438,10 @@ static int meson8b_dwmac_probe(struct platform_device *pdev)
goto err_remove_config_dt;
}
+ ret = meson8b_init_rgmii_delays(dwmac);
+ if (ret)
+ goto err_remove_config_dt;
+
ret = meson8b_init_rgmii_tx_clk(dwmac);
if (ret)
goto err_remove_config_dt;
--
2.29.2
next prev parent reply other threads:[~2020-11-15 18:53 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-15 18:52 [PATCH RFC v2 0/5] dwmac-meson8b: picosecond precision RX delay support Martin Blumenstingl
2020-11-15 18:52 ` [PATCH RFC v2 1/5] dt-bindings: net: dwmac-meson: use picoseconds for the RGMII RX delay Martin Blumenstingl
2020-11-17 2:01 ` Andrew Lunn
2020-11-17 18:32 ` Florian Fainelli
2020-12-07 19:17 ` Rob Herring
2020-12-13 16:59 ` Martin Blumenstingl
2020-12-15 13:40 ` Rob Herring
2020-11-15 18:52 ` [PATCH RFC v2 2/5] net: stmmac: dwmac-meson8b: fix enabling the timing-adjustment clock Martin Blumenstingl
2020-11-17 2:02 ` Andrew Lunn
2020-11-17 18:34 ` Florian Fainelli
2020-11-15 18:52 ` [PATCH RFC v2 3/5] net: stmmac: dwmac-meson8b: use picoseconds for the RGMII RX delay Martin Blumenstingl
2020-11-17 2:04 ` Andrew Lunn
2020-11-17 18:36 ` Florian Fainelli
2020-11-17 22:50 ` Martin Blumenstingl
2020-11-15 18:52 ` Martin Blumenstingl [this message]
2020-11-17 2:05 ` [PATCH RFC v2 4/5] net: stmmac: dwmac-meson8b: move RGMII delays into a separate function Andrew Lunn
2020-11-17 18:36 ` Florian Fainelli
2020-11-15 18:52 ` [PATCH RFC v2 5/5] net: stmmac: dwmac-meson8b: add support for the RGMII RX delay on G12A Martin Blumenstingl
2020-11-17 2:06 ` Andrew Lunn
2020-11-17 18:37 ` Florian Fainelli
2020-11-17 22:55 ` [PATCH RFC v2 0/5] dwmac-meson8b: picosecond precision RX delay support Martin Blumenstingl
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