linux/drivers/hsi, branch v3.16

hsi: omap_ssi_port: use normal module refcounting

2014-06-04T22:59:05Z

The ref_module() function is used for internal housekeeping of the module code, it's not normally used by subsystems or device drivers, and the use of ref_module in the omap_ssi_port driver causes a link build error when modules are disabled: hsi/controllers/omap_ssi_port.c: In function 'ssi_port_probe': hsi/controllers/omap_ssi_port.c:1119:2: error: implicit declaration of function 'ref_module' [-Werror=implicit-function-declaration] This changes the omap_ssi_port driver to use try_module_get() and module_put() instead, which is the normal way to ensure that the driver providing a device used in another module does not go away. Signed-off-by: Arnd Bergmann Cc: Sebastian Reichel Cc: Carlos Chinea Cc: Ivaylo Dimitrov Signed-off-by: Sebastian Reichel

HSI: fix omap ssi driver dependency

2014-06-03T21:46:28Z

The SSI protocol implementation has an incorrect dependency on the OMAP_SSI driver, which allows SSI to be built-in while the underlying OMAP_SSI implementation is a loadable module, causing a link error. This changes the dependency to the simpler 'depends on OMAP_SSI' that also ensures that SSI-protocol can only be a module if OMAP_SSI is not built-in. Signed-off-by: Arnd Bergmann Cc: Sebastian Reichel Cc: Ivaylo Dimitrov Cc: Pavel Machek Signed-off-by: Sebastian Reichel

HSI: Introduce Nokia N900 modem driver

2014-05-15T22:55:42Z

The Nokia N900's modem is connected via Synchronous Serial Interface (SSI), which is a legacy version of MIPI's High-speed Synchronous Serial Interface (HSI). The handles the GPIOs for enabling and resetting the modem and instanciates ssi-protocol for data exchange. It does not yet support exchanging voice data with the modem. Signed-off-by: Sebastian Reichel Reviewed-by: Pavel Machek Tested-By: Ivaylo Dimitrov

HSI: Introduce driver for SSI Protocol

2014-05-15T22:55:30Z

This adds a driver for the SSI McSAAB protocol as used in the Nokia N900. Signed-off-by: Carlos Chinea Signed-off-by: Sebastian Reichel Tested-By: Ivaylo Dimitrov

HSI: Introduce OMAP SSI driver

2014-05-15T22:54:51Z

Add OMAP SSI driver to the HSI subsystem. The Synchronous Serial Interface (SSI) is a legacy version of HSI. As in the case of HSI, it is mainly used to connect Application engines (APE) with cellular modem engines (CMT) in cellular handsets. It provides a multichannel, full-duplex, multi-core communication with no reference clock. The OMAP SSI block is capable of reaching speeds of 110 Mbit/s. Signed-off-by: Carlos Chinea Signed-off-by: Sebastian Reichel Tested-By: Ivaylo Dimitrov

HSI: Add common DT binding for HSI client devices

2014-05-15T22:54:45Z

Implement and document generic DT bindings for HSI clients. Signed-off-by: Sebastian Reichel Reviewed-by: Pavel Machek Tested-By: Ivaylo Dimitrov

HSI: export method to (un)register clients

2014-05-15T22:54:41Z

Expose method for registering and unregistering HSI clients, so that client drivers can register other client drivers. This is useful for HSI drivers, which want to use the functionality of other HSI drivers. For example the N900 modem driver can load HSI drivers for mcsaab protocol and speech protocol. Signed-off-by: Sebastian Reichel Reviewed-by: Pavel Machek Tested-By: Ivaylo Dimitrov

HSI: Add channel resource support to HSI clients

2014-05-15T22:54:36Z

Make HSI channel ids platform data, which can be provided by platform data. Signed-off-by: Sebastian Reichel Tested-By: Ivaylo Dimitrov

HSI: method to unregister clients from an hsi port

2014-05-15T22:54:29Z

This exports a method to unregister all clients from an hsi port. Signed-off-by: Sebastian Reichel Reviewed-by: Pavel Machek Tested-By: Ivaylo Dimitrov

HSI: hsi-char: fix driver for multiport scenarios

2014-05-04T07:49:58Z

Fix return code check of alloc_chrdev_region, which returns 0 on success. Signed-off-by: Sebastian Reichel Reviewed-by: Pavel Machek