i2c: designware: Add quirk for Intel Xe

The regmap is coming from the parent also in case of Xe
GPUs. Reusing the Wangxun quirk for that.

Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Co-developed-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Michael J. Ruhl <michael.j.ruhl@intel.com>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Andi Shyti <andi.shyti@kernel.org>
Link: https://lore.kernel.org/r/20250701122252.2590230-3-heikki.krogerus@linux.intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
[Rodrigo fixed the co-developed tags while merging]

diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index 3104f52e32be44ab6854f5da42c83f4d5d9d61bd..a35e4c64a1d46f43aa2d37c0d20fbbd4bc1ff600 100644 (file)
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -101,7 +101,7 @@ static int bt1_i2c_request_regs(struct dw_i2c_dev *dev)
 }
 #endif
 
-static int txgbe_i2c_request_regs(struct dw_i2c_dev *dev)
+static int dw_i2c_get_parent_regmap(struct dw_i2c_dev *dev)
 {
        dev->map = dev_get_regmap(dev->dev->parent, NULL);
        if (!dev->map)
@@ -123,12 +123,15 @@ static int dw_i2c_plat_request_regs(struct dw_i2c_dev *dev)
        struct platform_device *pdev = to_platform_device(dev->dev);
        int ret;
 
+       if (device_is_compatible(dev->dev, "intel,xe-i2c"))
+               return dw_i2c_get_parent_regmap(dev);
+
        switch (dev->flags & MODEL_MASK) {
        case MODEL_BAIKAL_BT1:
                ret = bt1_i2c_request_regs(dev);
                break;
        case MODEL_WANGXUN_SP:
-               ret = txgbe_i2c_request_regs(dev);
+               ret = dw_i2c_get_parent_regmap(dev);
                break;
        default:
                dev->base = devm_platform_ioremap_resource(pdev, 0);