Am 28.08.2015 um 08:30 schrieb Gao Pan:
> In our former i2c driver, i2c clk is enabled and disabled in
> xfer function, which contributes to power saving. However,
> the clk enable process brings a busy wait delay until the core
> is stable. As a result, the performance is sacrificed.
>
> To
Am 27.08.2015 um 09:06 schrieb Gao Pandy:
From: Heiner Kallweit mailto:hkallwe...@gmail.com Sent: Thursday, August
27, 2015 1:50 PM
To: Gao Pan-B54642; w...@the-dreams.de
Cc: linux-i2c@vger.kernel.org; Li Frank-B20596; Duan Fugang-B38611;
u.kleine-koe...@pengutronix.de; ker...@pengutronix.de
Am 26.08.2015 um 07:23 schrieb Gao Pan:
In our former i2c driver, i2c clk is enabled and disabled in
xfer function, which contributes to power saving. However,
the clk enable process brings a busy wait delay until the core
is stable. As a result, the performance is sacrificed.
To weigh the
Am 27.08.2015 um 06:01 schrieb Gao Pandy:
From: Heiner Kallweit mailto:hkallwe...@gmail.com Sent: Thursday, August
27, 2015 2:52 AM
To: Gao Pan-B54642; w...@the-dreams.de
Cc: linux-i2c@vger.kernel.org; Li Frank-B20596; Duan Fugang-B38611;
u.kleine-koe...@pengutronix.de; ker...@pengutronix.de
Am 25.08.2015 um 04:20 schrieb Gao Pan:
In our former i2c driver, i2c clk is enabled and disabled in
xfer function, which contributes to power saving. However,
the clk enable process brings a busy wait delay until the core
is stable. As a result, the performance is sacrificed.
To weigh the
Am 25.08.2015 um 13:09 schrieb Gao Pandy:
From: Heiner Kallweit mailto:hkallwe...@gmail.com Sent: Tuesday, August 25,
2015 2:37 PM
To: Gao Pan-B54642; w...@the-dreams.de
Cc: linux-i2c@vger.kernel.org; Li Frank-B20596; Duan Fugang-B38611;
u.kleine-koe...@pengutronix.de; ker...@pengutronix.de
Just by chance I stumbled across this driver and the recently added runtime PM
code.
Two things in i2c_imx_probe look suspicious to me:
- You activate the I2C clock and then initialize runtime PM with
pm_runtime_enable(pdev-dev);
pm_runtime_set_autosuspend_delay(pdev-dev,
