diff mbox series

[v14,mfd,2/9] net: mdio: mscc-miim: add ability to be used in a non-mmio configuration

Message ID 20220722040609.91703-3-colin.foster@in-advantage.com (mailing list archive)
State New, archived
Headers show
Series add support for VSC7512 control over SPI | expand

Commit Message

Colin Foster July 22, 2022, 4:06 a.m. UTC 
There are a few Ocelot chips that contain the logic for this bus, but are
controlled externally. Specifically the VSC7511, 7512, 7513, and 7514. In
the externally controlled configurations these registers are not
memory-mapped.

Add support for these non-memory-mapped configurations.

Signed-off-by: Colin Foster <colin.foster@in-advantage.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
---

v14
    * Add Reviewed and Acked tags

---
 drivers/net/mdio/mdio-mscc-miim.c | 42 +++++++++----------------------
 1 file changed, 12 insertions(+), 30 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/mdio/mdio-mscc-miim.c b/drivers/net/mdio/mdio-mscc-miim.c
index 08541007b18a..51f68daac152 100644
--- a/drivers/net/mdio/mdio-mscc-miim.c
+++ b/drivers/net/mdio/mdio-mscc-miim.c
@@ -12,6 +12,7 @@ 
 #include <linux/iopoll.h>
 #include <linux/kernel.h>
 #include <linux/mdio/mdio-mscc-miim.h>
+#include <linux/mfd/ocelot.h>
 #include <linux/module.h>
 #include <linux/of_mdio.h>
 #include <linux/phy.h>
@@ -270,44 +271,25 @@  static int mscc_miim_clk_set(struct mii_bus *bus)
 
 static int mscc_miim_probe(struct platform_device *pdev)
 {
-	struct regmap *mii_regmap, *phy_regmap = NULL;
 	struct device_node *np = pdev->dev.of_node;
+	struct regmap *mii_regmap, *phy_regmap;
 	struct device *dev = &pdev->dev;
-	void __iomem *regs, *phy_regs;
 	struct mscc_miim_dev *miim;
-	struct resource *res;
 	struct mii_bus *bus;
 	int ret;
 
-	regs = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
-	if (IS_ERR(regs)) {
-		dev_err(dev, "Unable to map MIIM registers\n");
-		return PTR_ERR(regs);
-	}
-
-	mii_regmap = devm_regmap_init_mmio(dev, regs, &mscc_miim_regmap_config);
-
-	if (IS_ERR(mii_regmap)) {
-		dev_err(dev, "Unable to create MIIM regmap\n");
-		return PTR_ERR(mii_regmap);
-	}
+	mii_regmap = ocelot_regmap_from_resource(pdev, 0,
+						 &mscc_miim_regmap_config);
+	if (IS_ERR(mii_regmap))
+		return dev_err_probe(dev, PTR_ERR(mii_regmap),
+				     "Unable to create MIIM regmap\n");
 
 	/* This resource is optional */
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	if (res) {
-		phy_regs = devm_ioremap_resource(dev, res);
-		if (IS_ERR(phy_regs)) {
-			dev_err(dev, "Unable to map internal phy registers\n");
-			return PTR_ERR(phy_regs);
-		}
-
-		phy_regmap = devm_regmap_init_mmio(dev, phy_regs,
-						   &mscc_miim_phy_regmap_config);
-		if (IS_ERR(phy_regmap)) {
-			dev_err(dev, "Unable to create phy register regmap\n");
-			return PTR_ERR(phy_regmap);
-		}
-	}
+	phy_regmap = ocelot_regmap_from_resource_optional(pdev, 1,
+						 &mscc_miim_phy_regmap_config);
+	if (IS_ERR(phy_regmap))
+		return dev_err_probe(dev, PTR_ERR(phy_regmap),
+				     "Unable to create phy register regmap\n");
 
 	ret = mscc_miim_setup(dev, &bus, "mscc_miim", mii_regmap, 0);
 	if (ret < 0) {