Merge branch 'net-stmmac-loongson1-cleanups'

Russell King says:

====================
net: stmmac: loongson1: cleanups

A couple of patches to cleanup loongson1. First, introducing a match
data struct to allow the per-match data to be extended beyond the init
function pointer, and then adding a setup method to allow the resource
base address to be translated to the MAC index at probe time rather
than repeatedly in the setup function.
====================

Link: https://patch.msgid.link/aFKXzlno7HkG-cNh@shell.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 55 insertions, 18 deletions

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson1.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson1.c
index 3e86810717d3..32b5d1492e2e 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson1.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-loongson1.c
@@ -44,24 +44,50 @@
 struct ls1x_dwmac {
 	struct plat_stmmacenet_data *plat_dat;
 	struct regmap *regmap;
+	unsigned int id;
 };
 
-static int ls1b_dwmac_syscon_init(struct platform_device *pdev, void *priv)
+struct ls1x_data {
+	int (*setup)(struct platform_device *pdev,
+		     struct plat_stmmacenet_data *plat_dat);
+	int (*init)(struct platform_device *pdev, void *bsp_priv);
+};
+
+static int ls1b_dwmac_setup(struct platform_device *pdev,
+			    struct plat_stmmacenet_data *plat_dat)
 {
-	struct ls1x_dwmac *dwmac = priv;
-	struct plat_stmmacenet_data *plat = dwmac->plat_dat;
-	struct regmap *regmap = dwmac->regmap;
+	struct ls1x_dwmac *dwmac = plat_dat->bsp_priv;
 	struct resource *res;
-	unsigned long reg_base;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!res) {
+		/* This shouldn't fail - stmmac_get_platform_resources()
+		 * already mapped this resource.
+		 */
 		dev_err(&pdev->dev, "Could not get IO_MEM resources\n");
 		return -EINVAL;
 	}
-	reg_base = (unsigned long)res->start;
 
-	if (reg_base == LS1B_GMAC0_BASE) {
+	if (res->start == LS1B_GMAC0_BASE) {
+		dwmac->id = 0;
+	} else if (res->start == LS1B_GMAC1_BASE) {
+		dwmac->id = 1;
+	} else {
+		dev_err(&pdev->dev, "Invalid Ethernet MAC base address %pR",
+			res);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int ls1b_dwmac_syscon_init(struct platform_device *pdev, void *priv)
+{
+	struct ls1x_dwmac *dwmac = priv;
+	struct plat_stmmacenet_data *plat = dwmac->plat_dat;
+	struct regmap *regmap = dwmac->regmap;
+
+	if (dwmac->id == 0) {
 		switch (plat->phy_interface) {
 		case PHY_INTERFACE_MODE_RGMII_ID:
 			regmap_update_bits(regmap, LS1X_SYSCON0,
@@ -80,7 +106,7 @@ static int ls1b_dwmac_syscon_init(struct platform_device *pdev, void *priv)
 		}
 
 		regmap_update_bits(regmap, LS1X_SYSCON0, GMAC0_SHUT, 0);
-	} else if (reg_base == LS1B_GMAC1_BASE) {
+	} else if (dwmac->id == 1) {
 		regmap_update_bits(regmap, LS1X_SYSCON0,
 				   GMAC1_USE_UART1 | GMAC1_USE_UART0,
 				   GMAC1_USE_UART1 | GMAC1_USE_UART0);
@@ -104,10 +130,6 @@ static int ls1b_dwmac_syscon_init(struct platform_device *pdev, void *priv)
 		}
 
 		regmap_update_bits(regmap, LS1X_SYSCON1, GMAC1_SHUT, 0);
-	} else {
-		dev_err(&pdev->dev, "Invalid Ethernet MAC base address %lx",
-			reg_base);
-		return -EINVAL;
 	}
 
 	return 0;
@@ -143,9 +165,9 @@ static int ls1x_dwmac_probe(struct platform_device *pdev)
 {
 	struct plat_stmmacenet_data *plat_dat;
 	struct stmmac_resources stmmac_res;
+	const struct ls1x_data *data;
 	struct regmap *regmap;
 	struct ls1x_dwmac *dwmac;
-	int (*init)(struct platform_device *pdev, void *priv);
 	int ret;
 
 	ret = stmmac_get_platform_resources(pdev, &stmmac_res);
@@ -159,8 +181,8 @@ static int ls1x_dwmac_probe(struct platform_device *pdev)
 		return dev_err_probe(&pdev->dev, PTR_ERR(regmap),
 				     "Unable to find syscon\n");
 
-	init = of_device_get_match_data(&pdev->dev);
-	if (!init) {
+	data = of_device_get_match_data(&pdev->dev);
+	if (!data) {
 		dev_err(&pdev->dev, "No of match data provided\n");
 		return -EINVAL;
 	}
@@ -175,21 +197,36 @@ static int ls1x_dwmac_probe(struct platform_device *pdev)
 				     "dt configuration failed\n");
 
 	plat_dat->bsp_priv = dwmac;
-	plat_dat->init = init;
+	plat_dat->init = data->init;
 	dwmac->plat_dat = plat_dat;
 	dwmac->regmap = regmap;
 
+	if (data->setup) {
+		ret = data->setup(pdev, plat_dat);
+		if (ret)
+			return ret;
+	}
+
 	return devm_stmmac_pltfr_probe(pdev, plat_dat, &stmmac_res);
 }
 
+static const struct ls1x_data ls1b_dwmac_data = {
+	.setup = ls1b_dwmac_setup,
+	.init = ls1b_dwmac_syscon_init,
+};
+
+static const struct ls1x_data ls1c_dwmac_data = {
+	.init = ls1c_dwmac_syscon_init,
+};
+
 static const struct of_device_id ls1x_dwmac_match[] = {
 	{
 		.compatible = "loongson,ls1b-gmac",
-		.data = &ls1b_dwmac_syscon_init,
+		.data = &ls1b_dwmac_data,
 	},
 	{
 		.compatible = "loongson,ls1c-emac",
-		.data = &ls1c_dwmac_syscon_init,
+		.data = &ls1c_dwmac_data,
 	},
 	{ }
 };