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i2c: mediatek: mt65xx: add optional vbus-supply

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Add vbus-supply which provides power to SCL/SDA. Pass this regulator
into core so it can be turned on/off for low power mode support.

Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: Qii Wang <qii.wang@mediatek.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Hsin-Yi Wang 2021-05-27 15:55:55 +08:00 committed by Wolfram Sang
parent c021087c43
commit 9029b9b2ae
1 changed files with 7 additions and 0 deletions
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7
drivers/i2c/busses/i2c-mt65xx.c
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@ -1220,6 +1220,13 @@ static int mtk_i2c_probe(struct platform_device *pdev)
i2c->adap.quirks = i2c->dev_comp->quirks;
i2c->adap.timeout = 2 * HZ;
i2c->adap.retries = 1;
i2c->adap.bus_regulator = devm_regulator_get_optional(&pdev->dev, "vbus");
if (IS_ERR(i2c->adap.bus_regulator)) {
if (PTR_ERR(i2c->adap.bus_regulator) == -ENODEV)
i2c->adap.bus_regulator = NULL;
else
return PTR_ERR(i2c->adap.bus_regulator);
}
ret = mtk_i2c_parse_dt(pdev->dev.of_node, i2c);
if (ret)