talos-obmc-linux/drivers/i2c, branch dev-4.10

drivers: i2c: fsi: Add proper abort method

2017-10-30T23:35:08+00:00

Driver wasn't cleaning up on timeout or in an error situation properly. Need to do a full reset if we fail in order to re-stablish a good state of the engine. OpenBMC-Staging-Count: 1 Signed-off-by: Edward A. James Signed-off-by: Andrew Jeffery

i2c: aspeed: Retain delay/setup/hold values when configuring bus frequency

2017-08-29T06:51:06+00:00

In addition to the base, low and high clock configuration, the AC timing register #1 on the AST2400 houses fields controlling: 1. tBUF: Minimum delay between Stop and Start conditions 2. tHDSTA: Hold time for the Start condition 3. tACST: Setup time for Start and Stop conditions, and hold time for the Repeated Start condition These values are defined in hardware on the AST2500 and therefore don't need to be set. aspeed_i2c_init_clk() was performing a direct write of the generated clock values rather than a read/mask/modify/update sequence to retain tBUF, tHDSTA and tACST, and therefore cleared the tBUF, tHDSTA and tACST fields on the AST2400. This resulted in a delay/setup/hold time of 1 base clock, which in some configurations is not enough for some devices (e.g. the MAX31785 fan controller, with an APB of 48MHz and a desired bus speed of 100kHz). Signed-off-by: Andrew Jeffery Reviewed-by: Brendan Higgins Tested-by: Brendan Higgins Signed-off-by: Wolfram Sang (cherry picked from commit 95fd3ad9cd5f8a4bb01215b846a3c8e6adefe21c) Signed-off-by: Andrew Jeffery

i2c: aspeed: add proper support fo 24xx clock params

2017-08-15T03:05:58+00:00

24xx BMCs have larger clock divider granularity which can cause problems when trying to set them as 25xx clock dividers; this adds clock setting code specific to 24xx. This also fixes a potential issue where clock dividers were rounded down instead of up. Signed-off-by: Brendan Higgins Signed-off-by: Wolfram Sang (cherry picked from commit 87b59ff8d1d9d809c014a4e20bc043064b6e0047) Signed-off-by: Joel Stanley

i2c: fsi: Fix bug on remove() and reset to upstream state

2017-08-08T12:32:23+00:00

Deleting entries in list on remove() even if the list was empty... Also a few other fixes just to get it in line with what I've sent upstream. OpenBMC-Staging-Count: 1 Signed-off-by: Edward A. James Signed-off-by: Joel Stanley

i2c: aspeed: fixed potential null pointer dereference

2017-08-01T00:14:05+00:00

Before I skipped null checks when the master is in the STOP state; this fixes that. OpenBMC-Staging-Count: 1 Signed-off-by: Brendan Higgins Signed-off-by: Joel Stanley

i2c: aspeed: Reset to upstream version

2017-07-26T12:17:41+00:00

This sets the i2c device driver to the same state as the one that was included in the 4.13 merge window. This is as of 4.13-rc1. There were three commits that added the code: $ git log --oneline --no-merges drivers/i2c/busses/i2c-aspeed.c drivers/irqchip/irq-aspeed-i2c-ic.c f9eb91350bb2 i2c: aspeed: added slave support for Aspeed I2C driver f327c686d3ba i2c: aspeed: added driver for Aspeed I2C f48e699ddf70 irqchip/aspeed-i2c-ic: Add I2C IRQ controller for Aspeed So this state is current as of f9eb91350bb2. OpenBMC-Staging-Count: 1 Tested-by: Andrew Jeffery Signed-off-by: Joel Stanley

i2c: fsi: Add SMBUS emulation

2017-07-19T13:57:13+00:00

Userspace expects this to be enabled. For example, it is required for using i2cdetect. Signed-off-by: Joel Stanley Acked-by: Eddie James Signed-off-by: Joel Stanley

i2c: fsi: Remove unnecessary compatible check

2017-07-08T02:36:44+00:00

The driver is probed by the FSI bus driver when the compatible matches, so we do not need to re-check it. OpenBMC-Staging-Count: 1 Signed-off-by: Joel Stanley

i2c: fsi: Fix devicetree parsing in FSI-attached I2C master algo

2017-07-08T02:36:44+00:00

Add compatible check for the master device node. Change "port" to "reg" for the port number property. Check that the port node is available. Add the device node to the adapter device. OpenBMC-Staging-Count: 1 Signed-off-by: Edward A. James Signed-off-by: Joel Stanley

i2c: fsi: Remove idx counter

2017-07-08T02:36:44+00:00

It is no longer used. OpenBMC-Staging-Count: 1 Acked-by: Eddie James Signed-off-by: Joel Stanley