From: Yicong Yang <yangyicong@hisilicon.com>
To: <wsa@kernel.org>, <linux-i2c@vger.kernel.org>
Cc: <andriy.shevchenko@linux.intel.com>, <digetx@gmail.com>,
<treding@nvidia.com>, <jarkko.nikula@linux.intel.com>,
<rmk+kernel@armlinux.org.uk>, <song.bao.hua@hisilicon.com>,
<john.garry@huawei.com>, <yangyicong@hisilicon.com>,
<prime.zeng@huawei.com>, <linuxarm@huawei.com>
Subject: [PATCH v4 2/4] i2c: core: add api to provide frequency mode strings
Date: Tue, 30 Mar 2021 21:05:47 +0800 [thread overview]
Message-ID: <1617109549-4013-3-git-send-email-yangyicong@hisilicon.com> (raw)
In-Reply-To: <1617109549-4013-1-git-send-email-yangyicong@hisilicon.com>
Some I2C drivers like Designware and HiSilicon will print the
bus frequency mode information, so add a public one that everyone
can make use of.
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
---
include/linux/i2c.h | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 10bd0b0..6837e64 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -47,6 +47,26 @@ typedef int (*i2c_slave_cb_t)(struct i2c_client *client,
#define I2C_MAX_HIGH_SPEED_MODE_FREQ 3400000
#define I2C_MAX_ULTRA_FAST_MODE_FREQ 5000000
+static inline const char *i2c_freq_mode_string(u32 bus_freq_hz)
+{
+ switch (bus_freq_hz) {
+ case I2C_MAX_STANDARD_MODE_FREQ:
+ return "Standard Mode(100KHz)";
+ case I2C_MAX_FAST_MODE_FREQ:
+ return "Fast Mode(400KHz)";
+ case I2C_MAX_FAST_MODE_PLUS_FREQ:
+ return "Fast Mode Plus(1.0MHz)";
+ case I2C_MAX_TURBO_MODE_FREQ:
+ return "Turbo Mode(1.4MHz)";
+ case I2C_MAX_HIGH_SPEED_MODE_FREQ:
+ return "High Speed Mode(3.4MHz)";
+ case I2C_MAX_ULTRA_FAST_MODE_FREQ:
+ return "Ultra Fast Mode(5.0MHz)";
+ default:
+ return "Unknown Mode";
+ }
+}
+
struct module;
struct property_entry;
--
2.8.1
next prev parent reply other threads:[~2021-03-30 13:09 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-30 13:05 [PATCH v4 0/4] Add support for HiSilicon I2C controller Yicong Yang
2021-03-30 13:05 ` [PATCH v4 1/4] i2c: core: add managed function for adding i2c adapters Yicong Yang
2021-03-30 13:30 ` Andy Shevchenko
2021-03-30 13:05 ` Yicong Yang [this message]
2021-03-30 13:30 ` [PATCH v4 2/4] i2c: core: add api to provide frequency mode strings Andy Shevchenko
2021-03-30 13:05 ` [PATCH v4 3/4] i2c: add support for HiSilicon I2C controller Yicong Yang
2021-03-30 13:29 ` Andy Shevchenko
2021-03-30 13:05 ` [PATCH v4 4/4] MAINTAINERS: Add maintainer for HiSilicon I2C driver Yicong Yang
2021-03-30 13:39 ` [PATCH v4 0/4] Add support for HiSilicon I2C controller Andy Shevchenko
2021-03-30 14:04 ` Yicong Yang
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=1617109549-4013-3-git-send-email-yangyicong@hisilicon.com \
--to=yangyicong@hisilicon.com \
--cc=andriy.shevchenko@linux.intel.com \
--cc=digetx@gmail.com \
--cc=jarkko.nikula@linux.intel.com \
--cc=john.garry@huawei.com \
--cc=linux-i2c@vger.kernel.org \
--cc=linuxarm@huawei.com \
--cc=prime.zeng@huawei.com \
--cc=rmk+kernel@armlinux.org.uk \
--cc=song.bao.hua@hisilicon.com \
--cc=treding@nvidia.com \
--cc=wsa@kernel.org \
/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).