u-boot.git/drivers/i2c, branch v2012.07-rc1

i2c: designware_i2c.c: Add support for the "i2c probe" command

2012-07-07T12:07:43Z

i2c_probe() is changed to reinit the i2c bus upon read failure. This is naturally the case upon i2c bus probing. Also, some printf messages upon read failure are removed. As they would interfere with the "i2c probe" command. Additionally, i2c_set_bus_speed() now returns 0, so that the "i2c speed" command can be used. Signed-off-by: Stefan Roese Cc: Amit Virdi Cc: Vipin Kumar

omap24xx_i2c: Add AM33XX support

2012-07-07T12:07:23Z

The same places that check for CONFIG_OMAP44XX need to check for CONFIG_AM33XX as we share the same i2c block. Cc: Heiko Schocher Signed-off-by: Tom Rini Acked-by: Heiko Schocher

Revert "I2C: OMAP: detect more devices when probing an i2c bus"

2012-07-07T12:07:22Z

This reverts commit 0e57968a215d1b9d271f3fa5bebeddeaea0c8075. The short version of the original commit is that some i2c devices cannot be probed via read as they NAK the first cycle, so try and probe via a write that we abort before it writes to the device. This however is not allowed by the TRM for any of these parts. The section on I2C_CON (table 17-35 I2C_CON for am/dm37x for example) says you must not change the register while STT has been set. On these parts, the unpredictable behavior that the chip exhibits is not problematic. On OMAP4 however it results in the chip being in a bad state: Panda # i2c probe Valid chip addresses: 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F 60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F 70 71 72 73 74 75 76 77 78 79 7A 7B 7C 7D 7E 7F Panda # i2c md 50 0 timed out in wait_for_pin: I2C_STAT=0 I2C read: I/O error Error reading the chip. We must revert the original behavior to bring probe back into line with the TRM. Cc: Nick Thompson Cc: Heiko Schocher Signed-off-by: Tom Rini Acked-by: Heiko Schocher

tegra: i2c: Add function to find DVC bus

2012-05-15T06:31:39Z

Add tegra_i2c_get_dvc_bus_num() to obtain the I2C bus number of DVC bus. This allows us to talk to the PMU. Signed-off-by: Simon Glass Signed-off-by: Tom Warren

i2c:designware Turn off the ctrl when setting the speed

2012-04-24T07:57:00Z

The designware i2c controller must be turned off before setting the speed in IC_CON register, as stated in the section 6.3.1 of the dw_apb_i2c_db.pdf. Signed-off-by: Michel Sanches Signed-off-by: Armando Visconti Signed-off-by: Amit Virdi

i2c: Add support for designware i2c controller

2012-04-24T07:56:37Z

Earlier, a driver exists in the u-boot source for designware i2c interface. That driver was specific to spear platforms. This patch implements the i2c controller as a generic driver which can be used by multiple platforms The driver files are now renamed to designware_i2c.c and designware_i2c.h and these are moved into drivers/i2c folder for reusability by other platforms Signed-off-by: Vipin Kumar Signed-off-by: Amit Virdi

sh: i2c: Add support I2C controller of SH7734

2012-04-24T07:40:04Z

Renesas SH7734 has two I2C interfaceis. This supports these I2C. V5: - include i2c.h. - Add check of icsr bit polling logic. - Implement i2c_probe. V4: - Remove sh_i2c_dump_reg function. - Use puts() when there's no format. - Chnage check for I2C bus number. - Remove space before the semi-colon. V3: - Fix error for whitespace. V2: - Changed bit control to use the clr|set|clrsetbits_* functions. - Fix wrong comment style. - Add new line before for loop in i2c_read. Signed-off-by: Nobuhiro Iwamatsu Acked-by: Heiko Schocher Signed-off-by: Nobuhiro Iwamatsu Acked-by: Mike Frysinger

tegra: i2c: Add I2C driver

2012-03-29T06:12:50Z

Add basic i2c driver for Tegra2 with 8- and 16-bit address support. The driver requires CONFIG_OF_CONTROL to obtain its configuration from the device tree. (Simon Glass: sjg@chromium.org modified for upstream) Signed-off-by: Simon Glass Acked-by: Heiko Schocher Acked-by: Stephen Warren Signed-off-by: Tom Warren

Revert "ARM: I2C: I2C Multi byte address support"

2012-02-21T06:28:47Z

This reverts commits 2faa76196af4b3e93bcb9e38ed9090cbd3b06db3 as this has introduced some large problems on all other platforms and have more changes in them than the commit message implies. Cc: Heiko Schocher Cc: Patil, Rachna Signed-off-by: Tom Rini

Revert "ARM: AM33XX: Add AM33XX I2C driver support"

2012-02-21T06:28:29Z

This reverts commit 498cbdfe62a8330f6c89765bdd15e60328a26511 as we need to revert the i2c changes that add the support for the platform. Cc: Heiko Schocher Cc: Patil, Rachna Signed-off-by: Tom Rini