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i2c: core: support bus regulator controlling in adapter

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Although in the most platforms, the bus power of i2c
are alway on, some platforms disable the i2c bus power
in order to meet low power request.

We can control bulk regulator if it is provided in i2c
adapter device.

Signed-off-by: Bibby Hsieh <bibby.hsieh@mediatek.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
This commit is contained in:
Bibby Hsieh
2021-05-27 15:55:53 +08:00
committed by Wolfram Sang
parent cb3c66af95
commit 5a7b95fb99
2 changed files with 97 additions and 0 deletions
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2
include/linux/i2c.h
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@@ -15,6 +15,7 @@
#include <linux/device.h> /* for struct device */
#include <linux/sched.h> /* for completion */
#include <linux/mutex.h>
#include <linux/regulator/consumer.h>
#include <linux/rtmutex.h>
#include <linux/irqdomain.h> /* for Host Notify IRQ */
#include <linux/of.h> /* for struct device_node */
@@ -729,6 +730,7 @@ struct i2c_adapter {
const struct i2c_adapter_quirks *quirks;
struct irq_domain *host_notify_domain;
struct regulator *bus_regulator;
};
#define to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev)