From: Jarkko Nikula <jarkko.nikula@linux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
linux-i2c@vger.kernel.org, Wolfram Sang <wsa@the-dreams.de>
Subject: Re: [PATCH v1 1/4] i2c: designware: Split out i2c_dw_validate_speed() helper
Date: Mon, 11 May 2020 16:11:57 +0300 [thread overview]
Message-ID: <228e9c62-60b9-e5b8-ea5e-e012df83479b@linux.intel.com> (raw)
In-Reply-To: <20200507135140.14635-1-andriy.shevchenko@linux.intel.com>
On 5/7/20 4:51 PM, Andy Shevchenko wrote:
> In order to export array supported speed for wider use,
> split out them along with i2c_dw_validate_speed() helper.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
> ---
> drivers/i2c/busses/i2c-designware-core.h | 31 +++++++++++++++++++++
> drivers/i2c/busses/i2c-designware-platdrv.c | 29 ++++---------------
> 2 files changed, 36 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h
> index 1674caf277451..626959573f894 100644
> --- a/drivers/i2c/busses/i2c-designware-core.h
> +++ b/drivers/i2c/busses/i2c-designware-core.h
> @@ -9,6 +9,7 @@
> * Copyright (C) 2009 Provigent Ltd.
> */
>
> +#include <linux/errno.h>
> #include <linux/i2c.h>
>
> #define DW_IC_DEFAULT_FUNCTIONALITY (I2C_FUNC_I2C | \
> @@ -351,3 +352,33 @@ extern int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev);
> #else
> static inline int i2c_dw_probe_lock_support(struct dw_i2c_dev *dev) { return 0; }
> #endif
> +
> +static const u32 i2c_dw_supported_speeds[] = {
> + I2C_MAX_HIGH_SPEED_MODE_FREQ,
> + I2C_MAX_FAST_MODE_PLUS_FREQ,
> + I2C_MAX_FAST_MODE_FREQ,
> + I2C_MAX_STANDARD_MODE_FREQ,
> +};
> +
> +static inline int i2c_dw_validate_speed(struct dw_i2c_dev *dev)
> +{
> + struct i2c_timings *t = &dev->timings;
> + unsigned int i;
> +
> + /*
> + * Only standard mode at 100kHz, fast mode at 400kHz,
> + * fast mode plus at 1MHz and high speed mode at 3.4MHz are supported.
> + */
> + for (i = 0; i < ARRAY_SIZE(i2c_dw_supported_speeds); i++) {
> + if (t->bus_freq_hz == i2c_dw_supported_speeds[i])
> + break;
> + }
> + if (i == ARRAY_SIZE(i2c_dw_supported_speeds)) {
> + dev_err(dev->dev,
> + "%d Hz is unsupported, only 100kHz, 400kHz, 1MHz and 3.4MHz are supported\n",
> + t->bus_freq_hz);
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
This header is included by every i2c-designware-*.c file and this inline
function is not tiny. Would it be better to have this in
i2c-designware-common.c instead?
--
Jarkko
next prev parent reply other threads:[~2020-05-11 13:12 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-07 13:51 [PATCH v1 1/4] i2c: designware: Split out i2c_dw_validate_speed() helper Andy Shevchenko
2020-05-07 13:51 ` [PATCH v1 2/4] i2c: designware: Split out OF parts into separate module Andy Shevchenko
2020-05-07 13:51 ` [PATCH v1 3/4] i2c: designware: Split out ACPI " Andy Shevchenko
2020-05-11 13:31 ` Jarkko Nikula
2020-05-11 14:05 ` Andy Shevchenko
2020-05-07 13:51 ` [PATCH v1 4/4] i2c: designware: Read counters from ACPI for PCI driver Andy Shevchenko
2020-05-11 13:11 ` Jarkko Nikula [this message]
2020-05-11 13:42 ` [PATCH v1 1/4] i2c: designware: Split out i2c_dw_validate_speed() helper Andy Shevchenko
2020-05-12 15:12 ` Jarkko Nikula
2020-05-19 12:33 ` Andy Shevchenko
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=228e9c62-60b9-e5b8-ea5e-e012df83479b@linux.intel.com \
--to=jarkko.nikula@linux.intel.com \
--cc=andriy.shevchenko@linux.intel.com \
--cc=linux-i2c@vger.kernel.org \
--cc=mika.westerberg@linux.intel.com \
--cc=wsa@the-dreams.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).