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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>,
	Jani Nikula <jani.nikula@linux.intel.com>,
	Joonas Lahtinen <joonas.lahtinen@linux.intel.com>,
	intel-gfx@lists.freedesktop.org
Subject: [PATCH v19 3/6] i2c: mediatek: mt65xx: add optional vbus-supply
Date: Thu, 15 Apr 2021 01:29:13 +0800
Message-ID: <20210414172916.2689361-4-hsinyi@chromium.org> (raw)
In-Reply-To: <20210414172916.2689361-1-hsinyi@chromium.org>

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 2ffd2f354d0a..82f2b6716005 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -1215,6 +1215,13 @@ 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)
-- 
2.31.1.295.g9ea45b61b8-goog


  parent reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-14 17:29 [PATCH v19 0/6] add power control in i2c Hsin-Yi Wang
2021-04-14 17:29 ` [PATCH v19 1/6] i2c: core: support bus regulator controlling in adapter Hsin-Yi Wang
2021-04-14 17:29 ` [PATCH v19 2/6] dt-binding: i2c: mt65xx: add vbus-supply property Hsin-Yi Wang
2021-04-14 22:19   ` [Intel-gfx] " Rob Herring
2021-04-14 17:29 ` Hsin-Yi Wang [this message]
2021-04-14 17:29 ` [PATCH v19 4/6] misc: eeprom: at24: check suspend status before disable regulator Hsin-Yi Wang
2021-04-16 14:09   ` Bartosz Golaszewski
2021-04-20 13:33     ` Hsin-Yi Wang
2021-04-14 17:29 ` [PATCH v19 5/6] arm64: dts: mt8183: add supply name for eeprom Hsin-Yi Wang
2021-04-14 17:29 ` [PATCH v19 6/6] drm/i915/selftests: Rename functions names Hsin-Yi Wang
2021-04-16 14:23   ` Jani Nikula
2021-04-16 14:42     ` Hsin-Yi Wang

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