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12 commits

Author SHA1 Message Date
Paul Kocialkowski
dd82242b4d i2c: mvtwsi: Support for up to 4 different controllers
Orion5x, Kirkwood and Armada XP platforms come with a single TWSI (I2C) MVTWSI
controller. However, other platforms using MVTWSI may come with more: this is
the case on Allwinner (sunxi) platforms, where up to 4 controllers can be found
on the same chip.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Acked-by: Heiko Schocher <hs@denx.de>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2015-04-15 16:33:17 +02:00
Stefan Roese
f582a1583b i2c: mvtwsi: Fix problem with baud rate calculation
The current implementation for baudrate calculation is incorrect.
This part from the formula:

"2 ^ (n + 1)" is not equivalent to (1 << n) but to (2 << n)!

This patch fixes this and moves this calculation to a function instead of using a macro.
This new function is taken from the Linux kernel.

This was detected and tested on the Marvell Armada A38x DB-88F6820-GP eval board.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Prafulla Wadaskar <prafulla@marvell.com>
Cc: Luka Perkov <luka.perkov@sartura.hr>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Ian Campbell <ijc@hellion.org.uk>
Cc: Heiko Schocher <hs@denx.de>
Acked-by: Hans de Goede <hdegoede@redhat.com>
2015-03-18 09:48:42 +01:00
Stefan Roese
6d5fe560a5 i2c: mvtwsi: Add support for Marvell Armada XP
To support the Armada XP SoC, we just need to include the correct header.

Signed-off-by: Stefan Roese <sr@denx.de>
Acked-by: Heiko Schocher <hs@denx.de>
Tested-by: Luka Perkov <luka@openwrt.org>
2014-10-23 09:59:21 -04:00
Stefan Roese
3dc23f7852 arm: marvell: Move arch/kirkwood.h to arch/soc.h
This move makes is possible to use this header not only from kirkwood
platforms but from all Marvell mvebu platforms.

Signed-off-by: Stefan Roese <sr@denx.de>
Tested-by: Luka Perkov <luka@openwrt.org>
Acked-by: Prafulla Wadaskar <prafulla@marvell.com>
2014-10-23 09:59:20 -04:00
Hans de Goede
6620377e4b sunxi: Add i2c support
Add support for the i2c controller found on all Allwinner sunxi SoCs,
this is the same controller as found on the Marvell orion5x and kirkwood
SoC families, with a slightly different register layout, so this patch uses
the existing mvtwsi code.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
Acked-By: Prafulla Wadaskar <prafulla@marvell.com>
Acked-by: Heiko Schocher <hs@denx.de>
[ ijc -- updated u-boot-spl-fel.lds ]
2014-07-18 19:41:30 +01:00
Hans de Goede
0db2bbdc04 mvtwsi: convert to CONFIG_SYS_I2C framework
Note this has only been tested on Allwinner sunxi devices (support for which
gets introduced by a later patch).

The kirkwood changes have been compile tested using the wireless_space board
config, the orion5x changes have been compile tested using the edminiv2 board
config.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Heiko Schocher <hs@denx.de>
2014-07-16 19:56:24 +01:00
Hans de Goede
2072e72629 mvtwsi: Remove unnecessary twsi_baud_rate and twsi_slave_address globals
These are used only once, so their is no need to have them global.

This also stops mvtwsi from using any bss vars making it easier to use
before dram init (to talk to the pmic to set the dram voltage).

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-05-14 12:59:12 +02:00
Hans de Goede
fab356a0b8 mvtwsi: Fix clock programming
The TWSI_FREQUENCY macro was wrong in 2 ways:
1) It was casting the result of the calculations to an u8, while i2c clk
rates are often >= 100Khz which won't fit in a u8, drop the cast.
2) It had an extra factor of 2 in the divider which neither the datasheet nor
the Linux driver have.

The comment for the default value was wrongly saying that m lives in
bits 4-7, while in reality it is in bits 3-6, as can be seen from the correct
shift by 3 used in i2c_init().

While at it remove the unused twsi_actual_speed variable.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2014-05-14 12:58:55 +02:00
Wolfgang Denk
1a4596601f Add GPL-2.0+ SPDX-License-Identifier to source files
Signed-off-by: Wolfgang Denk <wd@denx.de>
[trini: Fixup common/cmd_io.c]
Signed-off-by: Tom Rini <trini@ti.com>
2013-07-24 09:44:38 -04:00
Albert ARIBAUD
57b4bce996 Replace obsolete e-mail address
Signed-off-by: Albert ARIBAUD <albert.u.boot@aribaud.net>
2011-04-27 19:38:09 +02:00
Albert Aribaud
306563a773 i2c: rewrite mvtwsi, support orion5x and kirkwood
This rewrite of the mvtwsi driver is 25% smaller and much
faster and simpler than the previous code.

Signed-off-by: Albert Aribaud <albert.aribaud@free.fr>
Acked-by: Prafulla Wadaskar<prafulla@marvell.com>
Acked-by: Heiko Schocher<hs@denx.de>
2010-08-30 14:10:35 +02:00
Albert Aribaud
01ec99d969 i2c: rename kirkwood_i2c to mvtwsi
This driver is not kirkwood-specific and can also be used
e.g. by orion5x. Rename to a SoC-neutral name.

Signed-off-by: Albert Aribaud <albert.aribaud@free.fr>
Acked-by: Prafulla Wadaskar<prafulla@marvell.com>
Acked-by: Heiko Schocher<hs@denx.de>
2010-08-30 14:10:23 +02:00
Renamed from drivers/i2c/kirkwood_i2c.c (Browse further)