From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Stefan Lengfeld <contact@stefanchrist.eu>
Cc: wsa+renesas@sang-engineering.com, linux-i2c@vger.kernel.org,
linux-renesas-soc@vger.kernel.org, preid@electromag.com.au,
linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.or,
j-keerthy@ti.com, t-kristo@ti.com, grygorii.strashko@ti.com
Subject: Re: [RFC PATCH 1/3] i2c: imx: implement master_xfer_irqless callback
Date: Mon, 8 Oct 2018 13:06:01 +0300 [thread overview]
Message-ID: <20181008100601.GX15943@smile.fi.intel.com> (raw)
In-Reply-To: <20181007153937.16787-2-contact@stefanchrist.eu>
On Sun, Oct 07, 2018 at 05:39:35PM +0200, Stefan Lengfeld wrote:
> Rework the read and write code paths in the driver to support operation
> in IRQ disabled contexts. The patch is currently tested only on a
> phyCORE-i.MX6 Solo board.
>
> The driver supports normal operation, DMA transfers and now the polling
> mode or also called sleep-free or IRQ-less operation. It makes the code
> not simpler or easier to read, but IRQ less I2C transfers are needed on
> some hardware configurations, e.g. to trigger reboots on an external
> PMIC chip.
> + if (!polling)
> + schedule();
> + else
> + udelay(100);
What the point to use negative conditional when it's pretty straightforward and
positive may be used?
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2018-10-08 10:06 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-20 16:14 [RFC PATCH 0/4] i2c: core: introduce master_xfer_irqless Wolfram Sang
2018-09-20 16:14 ` [RFC PATCH 1/4] i2c: core: remove outdated DEBUG output Wolfram Sang
2018-09-20 17:23 ` Peter Rosin
2018-10-05 16:14 ` Wolfram Sang
2018-09-20 16:14 ` [RFC PATCH 2/4] i2c: core: remove level of indentation in i2c_transfer Wolfram Sang
2018-09-20 17:26 ` Peter Rosin
2018-09-20 22:46 ` Wolfram Sang
2018-10-05 16:15 ` Wolfram Sang
2018-09-20 16:14 ` [RFC PATCH 3/4] i2c: core: use I2C locking behaviour also for SMBUS Wolfram Sang
2018-09-20 17:31 ` Peter Rosin
2018-09-20 22:48 ` Wolfram Sang
2018-09-20 16:14 ` [RFC PATCH 4/4] i2c: core: introduce master_xfer_irqless callback Wolfram Sang
2018-09-20 17:41 ` Peter Rosin
2018-09-20 22:55 ` Wolfram Sang
2018-10-18 10:44 ` Russell King - ARM Linux
2019-02-09 18:03 ` Wolfram Sang
2018-09-20 22:02 ` [RFC PATCH 0/4] i2c: core: introduce master_xfer_irqless Tony Lindgren
2018-09-20 22:56 ` Wolfram Sang
2018-10-18 10:35 ` Keerthy
2018-09-20 23:01 ` Wolfram Sang
2018-09-23 20:20 ` Stefan Lengfeld
2018-10-07 15:39 ` [RFC PATCH 0/3] " Stefan Lengfeld
2018-10-07 15:39 ` [RFC PATCH 1/3] i2c: imx: implement master_xfer_irqless callback Stefan Lengfeld
2018-10-08 10:06 ` Andy Shevchenko [this message]
2018-10-07 15:39 ` [RFC PATCH 2/3] watchdog: da9062: avoid regmap in restart handler Stefan Lengfeld
2018-10-08 10:07 ` Andy Shevchenko
2018-10-07 15:39 ` [RFC PATCH 3/3] ARM: dts: phyboard-mira-dl: rely on PMIC for reboot and watchdog Stefan Lengfeld
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