netdev - [PATCH net-next v1 1/9] net: ethernet: mtk-star-emac: store bit_clk

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Date:   Thu, 20 Jan 2022 15:02:18 +0800
From:   Biao Huang <biao.huang@...iatek.com>
To:     David Miller <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Fabien Parent <fparent@...libre.com>
CC:     Jakub Kicinski <kuba@...nel.org>, Felix Fietkau <nbd@....name>,
        "John Crispin" <john@...ozen.org>,
        Sean Wang <sean.wang@...iatek.com>,
        Mark Lee <Mark-MC.Lee@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <netdev@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        Biao Huang <biao.huang@...iatek.com>,
        Yinghua Pan <ot_yinghua.pan@...iatek.com>,
        <srv_heupstream@...iatek.com>,
        Macpaul Lin <macpaul.lin@...iatek.com>
Subject: [PATCH net-next v1 1/9] net: ethernet: mtk-star-emac: store bit_clk_div in compat structure

From: Fabien Parent <fparent@...libre.com>

Not all the SoC are using the same clock divider. Move the divider into
a compat structure specific to the SoCs.

Signed-off-by: Biao Huang <biao.huang@...iatek.com>
Signed-off-by: Fabien Parent <fparent@...libre.com>
---
 drivers/net/ethernet/mediatek/mtk_star_emac.c | 23 +++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_star_emac.c b/drivers/net/ethernet/mediatek/mtk_star_emac.c
index 1d5dd2015453..26f5020f2e9c 100644
--- a/drivers/net/ethernet/mediatek/mtk_star_emac.c
+++ b/drivers/net/ethernet/mediatek/mtk_star_emac.c
@@ -17,6 +17,7 @@
 #include <linux/module.h>
 #include <linux/netdevice.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/of_mdio.h>
 #include <linux/of_net.h>
 #include <linux/platform_device.h>
@@ -232,6 +233,10 @@ struct mtk_star_ring {
 	unsigned int tail;
 };
 
+struct mtk_star_compat {
+	unsigned char bit_clk_div;
+};
+
 struct mtk_star_priv {
 	struct net_device *ndev;
 
@@ -257,6 +262,8 @@ struct mtk_star_priv {
 	int duplex;
 	int pause;
 
+	const struct mtk_star_compat *compat_data;
+
 	/* Protects against concurrent descriptor access. */
 	spinlock_t lock;
 
@@ -899,7 +906,7 @@ static void mtk_star_init_config(struct mtk_star_priv *priv)
 	regmap_write(priv->regs, MTK_STAR_REG_SYS_CONF, val);
 	regmap_update_bits(priv->regs, MTK_STAR_REG_MAC_CLK_CONF,
 			   MTK_STAR_MSK_MAC_CLK_CONF,
-			   MTK_STAR_BIT_CLK_DIV_10);
+			   priv->compat_data->bit_clk_div);
 }
 
 static void mtk_star_set_mode_rmii(struct mtk_star_priv *priv)
@@ -1461,6 +1468,7 @@ static int mtk_star_probe(struct platform_device *pdev)
 
 	priv = netdev_priv(ndev);
 	priv->ndev = ndev;
+	priv->compat_data = of_device_get_match_data(&pdev->dev);
 	SET_NETDEV_DEV(ndev, dev);
 	platform_set_drvdata(pdev, ndev);
 
@@ -1556,10 +1564,17 @@ static int mtk_star_probe(struct platform_device *pdev)
 	return devm_register_netdev(dev, ndev);
 }
 
+static struct mtk_star_compat mtk_star_mt8516_compat = {
+	.bit_clk_div = MTK_STAR_BIT_CLK_DIV_10,
+};
+
 static const struct of_device_id mtk_star_of_match[] = {
-	{ .compatible = "mediatek,mt8516-eth", },
-	{ .compatible = "mediatek,mt8518-eth", },
-	{ .compatible = "mediatek,mt8175-eth", },
+	{ .compatible = "mediatek,mt8516-eth",
+	  .data = &mtk_star_mt8516_compat },
+	{ .compatible = "mediatek,mt8518-eth",
+	  .data = &mtk_star_mt8516_compat },
+	{ .compatible = "mediatek,mt8175-eth",
+	  .data = &mtk_star_mt8516_compat },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, mtk_star_of_match);
-- 
2.25.1