soc: ti: k3-socinfo: Do not use syscon helper to build regmap

The syscon helper device_node_to_regmap() is used to fetch a regmap
registered to a device node. It also currently creates this regmap
if the node did not already have a regmap associated with it. This
should only be used on "syscon" nodes. This driver is not such a
device and instead uses device_node_to_regmap() on its own node as
a hacky way to create a regmap for itself.

This will not work going forward and so we should create our regmap
the normal way by defining our regmap_config, fetching our memory
resource, then using the normal regmap_init_mmio() function.

Signed-off-by: Andrew Davis <afd@ti.com>
Link: https://lore.kernel.org/r/20250123181726.597144-1-afd@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>

diff --git a/drivers/soc/ti/k3-socinfo.c b/drivers/soc/ti/k3-socinfo.c
index 4fb0f0a248288b1435550a978e1a2528e7229be8..704039eb3c07844f91cd60282cad7831f3c8cfe8 100644 (file)
--- a/drivers/soc/ti/k3-socinfo.c
+++ b/drivers/soc/ti/k3-socinfo.c
@@ -105,6 +105,12 @@ err_unknown_variant:
        return -ENODEV;
 }
 
+static const struct regmap_config k3_chipinfo_regmap_cfg = {
+       .reg_bits = 32,
+       .val_bits = 32,
+       .reg_stride = 4,
+};
+
 static int k3_chipinfo_probe(struct platform_device *pdev)
 {
        struct device_node *node = pdev->dev.of_node;
@@ -112,13 +118,18 @@ static int k3_chipinfo_probe(struct platform_device *pdev)
        struct device *dev = &pdev->dev;
        struct soc_device *soc_dev;
        struct regmap *regmap;
+       void __iomem *base;
        u32 partno_id;
        u32 variant;
        u32 jtag_id;
        u32 mfg;
        int ret;
 
-       regmap = device_node_to_regmap(node);
+       base = devm_platform_ioremap_resource(pdev, 0);
+       if (IS_ERR(base))
+               return PTR_ERR(base);
+
+       regmap = regmap_init_mmio(dev, base, &k3_chipinfo_regmap_cfg);
        if (IS_ERR(regmap))
                return PTR_ERR(regmap);