All of lore.kernel.org
 help / color / mirror / Atom feed
From: Simon Glass <sjg@chromium.org>
To: u-boot@lists.denx.de
Subject: [PATCH 00/12] i2c: designware_ic2: Improvements to timing
Date: Sat, 21 Dec 2019 09:15:13 -0700	[thread overview]
Message-ID: <20191221161525.27976-1-sjg@chromium.org> (raw)

This series updates the Designware I2C driver to support reading its
timing from the device tree and handling it in units of nanoseconds
instead of clock cycles.

A new function converts from nanoseconds to the units used by the I2C
controller and makes sure that the requested bus speed is not exceeded.
This is more accurate than the existing method.

The series includes a few smaller clean-ups in the same driver.

There is currently an existing configuration method used just for a few
x86 boards (Baytrail). This method is retained but it should be removed in
favour of using the device tree. I have not done this in this series since
I am not sure of the timings to use.


Simon Glass (12):
  i2c: designware_i2c: Add more registers
  i2c: designware_i2c: Don't allow changing IC_CLK
  i2c: designware_i2c: Include clk.h in the header file
  i2c: designware_i2c: Rename 'max' speed to 'high' speed
  i2c: designware_i2c: Use an enum for selected speed mode
  i2c: designware_i2c: Use an accurate bus clock instead of MHz
  i2c: designware_i2c: Bring in the binding file
  i2c: designware_i2c: Read device-tree properties
  i2c: designware_i2c: Drop scl_sda_cfg parameter
  i2c: designware_i2c: Put hold config in a struct
  i2c: designware_i2c: Rewrite timing calculation
  i2c: designware_i2c: Add spike supression

 .../i2c/i2c-designware.txt                    |  73 +++++
 drivers/i2c/designware_i2c.c                  | 263 ++++++++++++++----
 drivers/i2c/designware_i2c.h                  |  53 +++-
 drivers/i2c/designware_i2c_pci.c              |   4 +-
 4 files changed, 332 insertions(+), 61 deletions(-)
 create mode 100644 doc/device-tree-bindings/i2c/i2c-designware.txt

-- 
2.24.1.735.g03f4e72817-goog

             reply	other threads:[~2019-12-21 16:15 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-21 16:15 Simon Glass [this message]
2019-12-21 16:15 ` [PATCH 01/12] i2c: designware_i2c: Add more registers Simon Glass
2019-12-23  8:15   ` Tan, Ley Foon
2019-12-25 10:20     ` pt
2019-12-21 16:15 ` [PATCH 02/12] i2c: designware_i2c: Don't allow changing IC_CLK Simon Glass
2019-12-21 16:15 ` [PATCH 03/12] i2c: designware_i2c: Include clk.h in the header file Simon Glass
2019-12-23  8:17   ` Tan, Ley Foon
2019-12-21 16:15 ` [PATCH 04/12] i2c: designware_i2c: Rename 'max' speed to 'high' speed Simon Glass
2019-12-21 16:15 ` [PATCH 05/12] i2c: designware_i2c: Use an enum for selected speed mode Simon Glass
2019-12-21 16:15 ` [PATCH 06/12] i2c: designware_i2c: Use an accurate bus clock instead of MHz Simon Glass
2019-12-21 16:15 ` [PATCH 07/12] i2c: designware_i2c: Bring in the binding file Simon Glass
2019-12-21 16:15 ` [PATCH 08/12] i2c: designware_i2c: Read device-tree properties Simon Glass
2019-12-21 16:15 ` [PATCH 09/12] i2c: designware_i2c: Drop scl_sda_cfg parameter Simon Glass
2019-12-21 16:15 ` [PATCH 10/12] i2c: designware_i2c: Put hold config in a struct Simon Glass
2019-12-21 16:15 ` [PATCH 11/12] i2c: designware_i2c: Rewrite timing calculation Simon Glass
2019-12-21 16:15 ` [PATCH 12/12] i2c: designware_i2c: Add spike supression Simon Glass

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=20191221161525.27976-1-sjg@chromium.org \
    --to=sjg@chromium.org \
    --cc=u-boot@lists.denx.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.