Eric Lee / smarc-fsl-linux-kernel

24 Jun, 2016

1 commit

13 Mar, 2016

1 commit

  • 33b96d2c9   bus: imx-weim: Take the 'status' property value into account ... Browse Code »

    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

    Fabio Estevam
     

02 Mar, 2015

1 commit

20 Oct, 2014

1 commit

18 Jul, 2014

1 commit

  • 26651c437   bus: imx-weim: populate devices on a simple bus ... Browse Code »

    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

    Liu Ying
     

05 Mar, 2014

1 commit

  • 8d9ee21e9   bus: imx-weim: support CS GPR configuration ... Browse Code »

    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

    Shawn Guo
     

16 Aug, 2013

5 commits

17 Jun, 2013

1 commit

  • 85bf6d4e4   drivers: bus: add a new driver for WEIM ... Browse Code »

    The WEIM(Wireless External Interface Module) works like a bus.
    You can attach many different devices on it, such as NOR, onenand.

    In the case of i.MX6q-sabreauto, the NOR is connected to WEIM.

    This patch also adds the devicetree binding document.
    The driver only works when the devicetree is enabled.

    Signed-off-by: Huang Shijie
    Acked-by: Sascha Hauer
    Signed-off-by: Shawn Guo

    Huang Shijie