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

[ Upstream commit a5caf03188e44388e8c618dcbe5fffad1a249385 ]

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 <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Nishanth Menon <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
(cherry picked from commit 06100e642f4b83ec758744e5f992d7a2039ec98f)
Signed-off-by: Jack Vogel <[email protected]>

Author: glneo

drivers/soc/ti/k3-socinfo.c

@@ -105,20 +105,31 @@ k3_chipinfo_variant_to_sr(unsigned int partno, unsigned int 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;
 	struct soc_device_attribute *soc_dev_attr;
 	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);