linux-toradex.git/drivers/bus/imx-weim.c, branch v4.9.8

bus: imx-weim: use of_platform_default_populate() to populate default bus

2016-06-23T20:00:45+00:00

Use helper of_platform_default_populate() in linux/of_platform
when possible, instead of calling of_platform_populate() with
the default match table.

Acked-by: Shawn Guo 
Cc: Signed-off-by: Huang Shijie 
Cc: Shawn Guo 
Signed-off-by: Kefeng Wang 
Signed-off-by: Rob Herring

bus: imx-weim: Take the 'status' property value into account

2016-03-13T01:07:39+00:00

Currently we have an incorrect behaviour when multiple devices
are present under the weim node. For example:

&weim {
	...
	status = "okay";

	sram@0,0 {
		...
        	status = "okay";
	};

	mram@0,0 {
		...
        	status = "disabled";
    	};
};

In this case only the 'sram' device should be probed and not 'mram'.

However what happens currently is that the status variable is ignored,
causing the 'sram' device to be disabled and 'mram' to be enabled.

Change the weim_parse_dt() function to use
for_each_available_child_of_node()so that the devices marked with
'status = disabled' are not probed.

Cc: 
Suggested-by: Wolfgang Netbal 
Signed-off-by: Fabio Estevam 
Reviewed-by: Sascha Hauer 
Acked-by: Shawn Guo 
Signed-off-by: Olof Johansson

bus: imx-weim: improve error handling upon child probe-failure

2015-03-02T13:47:59+00:00

Probe all children of the WEIM node, reporting any failures.  Report
failure from parsing of WEIM node itself if probes of all children fail.

Signed-off-by: Alison Chaiken 
Acked-by: Sascha Hauer 
Signed-off-by: Shawn Guo

bus: drop owner assignment from platform_drivers

2014-10-20T14:20:19+00:00

A platform_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Wolfram Sang

bus: imx-weim: populate devices on a simple bus

2014-07-18T08:11:36+00:00

There could be some memory map devices located in
a certain chip select region of the i.MX WEIM.
The devices could be attached to a simple bus(for
example, a AXI bus) whose root node is one child
device tree node of the i.MX WEIM device tree node.
There should be a bridge(very likely, software
transparent) bewteen the i.MX WEIM and the simple bus.
This patch makes the i.MX WEIM driver possible to
populate devices on a simple bus.  In this way, people
may try various IPs(in a FPGA, maybe) outside of i.MX
chips with the i.MX WEIM embedded.

Signed-off-by: Liu Ying 
Signed-off-by: Shawn Guo

bus: imx-weim: support CS GPR configuration

2014-03-05T02:40:46+00:00

For imx50-weim and imx6q-weim type of devices, there might a WEIM CS
space configuration register in General Purpose Register controller,
e.g. IOMUXC_GPR1 on i.MX6Q.

Depending on which configuration of the following 4 is chosen for given
system, IOMUXC_GPR1[11:0] should be set up as 05, 033, 0113 or 01111
correspondingly.

	CS0(128M) CS1(0M)  CS2(0M)  CS3(0M)
	CS0(64M)  CS1(64M) CS2(0M)  CS3(0M)
	CS0(64M)  CS1(32M) CS2(32M) CS3(0M)
	CS0(32M)  CS1(32M) CS2(32M) CS3(32M)

The patch creates a function for such type of devices, which scans
'ranges' property of WEIM node and build the GPR value incrementally.
Thus the WEIM CS GPR can be set up automatically at boot time.

Signed-off-by: Shawn Guo 
Reviewed-by: Philippe De Muyter 
Tested-by: Philippe De Muyter

drivers: bus: imx-weim: Add support for i.MX1/21/25/27/31/35/50/51/53

2013-08-16T04:59:44+00:00

This patch adds WEIM support for all i.MX CPUs supported by the kernel.

Signed-off-by: Alexander Shiyan 
Signed-off-by: Shawn Guo

drivers: bus: imx-weim: Add missing platform_driver.owner field

2013-08-16T04:59:44+00:00

Signed-off-by: Alexander Shiyan 
Signed-off-by: Shawn Guo

drivers: bus: imx-weim: use module_platform_driver_probe()

2013-08-16T04:59:43+00:00

Driver should be called only once at startup, so code converted
to using module_platform_driver_probe().

Signed-off-by: Alexander Shiyan 
Signed-off-by: Shawn Guo

drivers: bus: imx-weim: Simplify error path

2013-08-16T04:59:43+00:00

Signed-off-by: Alexander Shiyan 
Signed-off-by: Shawn Guo