12 Mar, 2015

1 commit

  • This patch adds automatic configuration for the ADM CRCI muxing required to
    support DMA operations for GSBI clients. The GSBI mode and instance determine
    the correct TCSR ADM CRCI MUX value that must be programmed so that the DMA
    works properly.

    Signed-off-by: Andy Gross
    Signed-off-by: Kumar Gala

    Andy Gross
     

20 Oct, 2014

1 commit


24 Sep, 2014

1 commit

  • since commit 31964ffebbb9 ("tty: serial: msm: Remove direct access to GSBI")'
    serial hangs if earlyprintk are enabled.

    This hang is noticed only when the GSBI driver is probed and all the
    earlyprintks before gsbi probe are seen on the console.
    The reason why it hangs is because GSBI driver disables hclk in its
    probe function without realizing that the serial IP might be in use by
    a bootconsole. As gsbi driver disables the clock in probe the
    bootconsole locks up.

    Turning off hclk's could be dangerous if there are system components
    like earlyprintk using the hclk.

    This patch fixes the issue by delegating the clock management to
    probe and remove functions in gsbi rather than disabling the clock in probe.

    More detailed problem description can be found here:
    http://www.spinics.net/lists/linux-arm-msm/msg10589.html

    Tested-by: Linus Walleij
    Signed-off-by: Srinivas Kandagatla
    Signed-off-by: Olof Johansson

    Srinivas Kandagatla
     

27 May, 2014

1 commit


24 May, 2014

1 commit

  • The GSBI (General Serial Bus Interface) driver controls the overarching
    configuration of the shared serial bus infrastructure on APQ8064, IPQ8064, and
    earlier QCOM processors. The GSBI supports UART, I2C, SPI, and UIM
    functionality in various combinations.

    Signed-off-by: Andy Gross
    Signed-off-by: Kumar Gala

    Andy Gross