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 v20 3/5] i2c: mediatek: mt65xx: add optional vbus-supply
Date: Tue, 27 Apr 2021 13:36:15 +0800 [thread overview]
Message-ID: <20210427053617.27972-4-hsinyi@chromium.org> (raw)
In-Reply-To: <20210427053617.27972-1-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)
--
2.31.1.498.g6c1eba8ee3d-goog
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next prev parent reply other threads:[~2021-04-27 5:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-27 5:36 [PATCH v20 0/5] add power control in i2c Hsin-Yi Wang
2021-04-27 5:36 ` [PATCH v20 1/5] i2c: core: support bus regulator controlling in adapter Hsin-Yi Wang
2021-04-27 5:36 ` [PATCH v20 2/5] dt-binding: i2c: mt65xx: add vbus-supply property Hsin-Yi Wang
2021-04-27 5:36 ` Hsin-Yi Wang [this message]
2021-04-27 5:36 ` [PATCH v20 4/5] misc: eeprom: at24: check suspend status before disable regulator Hsin-Yi Wang
2021-04-27 5:36 ` [PATCH v20 5/5] arm64: dts: mt8183: add supply name for eeprom Hsin-Yi Wang
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