[PATCH] phy: ti: gmii-sel: Do not use syscon helper to build regmap

From: Andrew Davis
Date: Thu Jan 23 2025 - 13:22:50 EST


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@xxxxxx>
---
drivers/phy/ti/phy-gmii-sel.c | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/ti/phy-gmii-sel.c b/drivers/phy/ti/phy-gmii-sel.c
index e0ca59ae31531..ff5d5e29629fa 100644
--- a/drivers/phy/ti/phy-gmii-sel.c
+++ b/drivers/phy/ti/phy-gmii-sel.c
@@ -424,6 +424,12 @@ static int phy_gmii_sel_init_ports(struct phy_gmii_sel_priv *priv)
return 0;
}

+static const struct regmap_config phy_gmii_sel_regmap_cfg = {
+ .reg_bits = 32,
+ .val_bits = 32,
+ .reg_stride = 4,
+};
+
static int phy_gmii_sel_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -468,7 +474,14 @@ static int phy_gmii_sel_probe(struct platform_device *pdev)

priv->regmap = syscon_node_to_regmap(node->parent);
if (IS_ERR(priv->regmap)) {
- priv->regmap = device_node_to_regmap(node);
+ void __iomem *base;
+
+ base = devm_platform_ioremap_resource(pdev, 0);
+ if (IS_ERR(base))
+ return dev_err_probe(dev, PTR_ERR(base),
+ "failed to get base memory resource\n");
+
+ priv->regmap = regmap_init_mmio(dev, base, &phy_gmii_sel_regmap_cfg);
if (IS_ERR(priv->regmap))
return dev_err_probe(dev, PTR_ERR(priv->regmap),
"Failed to get syscon\n");
--
2.39.2