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From:   Hsin-Yi Wang <hsinyi@chromium.org>
To:     Wolfram Sang <wsa@kernel.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Bartosz Golaszewski <bgolaszewski@baylibre.com>
Cc:     linux-i2c@vger.kernel.org, Qii Wang <qii.wang@mediatek.com>,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Mark Brown <broonie@kernel.org>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Bibby Hsieh <bibby.hsieh@mediatek.com>,
        Arnd Bergmann <arnd@arndb.de>
Subject: [PATCH v21 3/5] i2c: mediatek: mt65xx: add optional vbus-supply
Date:   Fri,  7 May 2021 21:14:04 +0800
Message-Id: <20210507131406.2224177-4-hsinyi@chromium.org>
In-Reply-To: <20210507131406.2224177-1-hsinyi@chromium.org>
References: <20210507131406.2224177-1-hsinyi@chromium.org>
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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>
---
 drivers/i2c/busses/i2c-mt65xx.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index 5ddfa4e56ee2..22d1d14b5de5 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -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)
-- 
2.31.1.607.g51e8a6a459-goog