kernel/linux.git/include/linux/i2c.h, branch v4.17.5

i2c: add i2c_get_device_id() to get the standard i2c device id

2018-03-06T09:57:59+00:00

Can be used during probe to double check that the probed device is what is expected. Loosely based on code from Adrian Fiergolski . Tested-by: Adrian Fiergolski Reviewed-by: Wolfram Sang Signed-off-by: Peter Rosin

i2c: add 'set_sda' to bus_recovery_info

2018-01-15T23:04:19+00:00

This will be needed when we want to create STOP conditions, too, later. Create the needed fields and populate them for the GPIO case if the GPIO is set to output. Tested-by: Phil Reid Signed-off-by: Wolfram Sang Reviewed-by: Linus Walleij Signed-off-by: Wolfram Sang

i2c: add identifier in declarations for i2c_bus_recovery

2018-01-15T23:04:03+00:00

No reason to have them undefined, so let's add them. Tested-by: Phil Reid Signed-off-by: Wolfram Sang Signed-off-by: Wolfram Sang

i2c: make kerneldoc about bus recovery more precise

2018-01-15T23:04:02+00:00

"Used internally" is vague. What it actually means is that those fields are populated by the core if valid GPIOs are provided. Change the comments to reflect that. Tested-by: Phil Reid Signed-off-by: Wolfram Sang Signed-off-by: Wolfram Sang

i2c: add i2c_master_{send|recv}_dmasafe

2017-12-03T20:23:38+00:00

Use the new helper to create variants of i2c_master_{send|recv} which mark their buffers as DMA safe. Signed-off-by: Wolfram Sang Acked-by: Jonathan Cameron Signed-off-by: Wolfram Sang

i2c: refactor i2c_master_{send_recv}

2017-12-03T20:22:29+00:00

Those two functions are very similar, the only differences are that one needs the I2C_M_RD flag for its message while the other one needs the buffer casted to drop the const. Introduce a generic helper which allows to specify the flags (also needed later for DMA safe variants of these calls) and let the casting be done in the inlining functions which are now calling the new helper function. Signed-off-by: Wolfram Sang Reviewed-by: Jonathan Cameron Signed-off-by: Wolfram Sang

i2c: add helpers to ease DMA handling

2017-12-03T19:47:44+00:00

One helper checks if DMA is suitable and optionally creates a bounce buffer, if not. The other function returns the bounce buffer and makes sure the data is properly copied back to the message. Reviewed-by: Jonathan Cameron Signed-off-by: Wolfram Sang Signed-off-by: Wolfram Sang

i2c: remove legacy integer scl/sda gpio for recovery

2017-11-27T17:40:01+00:00

Remove all reference to code related to using integer based ids for scl/sda gpio for bus recovery. All in tree drivers are now using the gpio descriptors to specific the required gpios. Reviewed-by: Andy Shevchenko Signed-off-by: Phil Reid Reviewed-by: Jarkko Nikula Signed-off-by: Wolfram Sang

i2c: Switch to using gpiod interface for gpio bus recovery

2017-11-27T17:39:13+00:00

Currently the i2c gpio recovery code uses gpio integer interface instead of the gpiod. This change switch the core code to use the gpiod while still retaining compatibility with the gpio integer interface. This will allow individual driver to be updated and tested individual to switch to using the gpiod interface. Reviewed-by: Jarkko Nikula Reviewed-by: Andy Shevchenko Signed-off-by: Phil Reid Signed-off-by: Wolfram Sang

i2c: use macro IS_ENABLED in header i2c.h

2017-11-27T17:31:57+00:00

Using the macro IS_ENABLED to check the option CONFIG_I2C=(y|m) makes the code nicer. No functional change. Signed-off-by: Stefan Lengfeld Signed-off-by: Wolfram Sang