WIFI QCA6234 is not waking up properly after sleep (ESDHC_WP ??)

[manoelramon]

I am working in a product based on Android JB and IMX6. However, I have notice the WiFi is failing after the device enter in sleep mode. We are using the QCA6234 as SD interface which is defined in the sd2.

I tried to reset the chip during the resume process but the driver breaks and we lose control of WiFi... However, I was investigating some gpios and I noticed the following with the gpio ESDHC_WP:

Before activate Wi-Fi -> LOW

After activate Wi-Fi -> LOW

After sleep Wi-Fi -> HIGH  (at this moment I can see a lot of "AP failed to scan" and WiFi only recovers if I turn off and turn on the WiFi again).

In the board definition I have

#define MY_SDIO_CD                         IMX_GPIO_NR(2, 7)

static const struct esdhc_platform_data mx6_horizon_sd2_data __initconst = {

        .cd_gpio = MY_SDIO_CD,

        .keep_power_at_suspend = 1,

        .support_8bit = 0,

        .delay_line = 0,

        .cd_type = ESDHC_CD_CONTROLLER,

        .support_18v = 1,

        .runtime_pm = 1,

};

So, as you can see keep_power_at_suspend = 1.

Any idea to help me to debug this issue ? Many thanks !!!!

[igorpadykov]

Hi Manoel

seems for gpio ESDHC_WP there could be record like:

.wp_gpio

= SABREAUTO_SD3_WP,

as in linux/arch/arm/mach-mx6/board-mx6q_sabreauto.c

#define SABREAUTO_SD3_WP

IMX_GPIO_NR(1, 13)

Best regards

igor

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[manoelramon]

Many thanks.. However, my hardware does not have any GPIO for WP. Do you have some recommendation ? I tried to set the a GPIO not in use in my hardware as the wp_gpio as you recommended and the change the code in the sdhci-esdhc-imx.c in order to return always LOW as you can see below:

static unsigned int esdhc_pltfm_get_ro(struct sdhci_host *host)

{

        struct esdhc_platform_data *boarddata = host->mmc->parent->platform_data;

        if (boarddata && gpio_is_valid(boarddata->wp_gpio))

        {

if (boarddata->wp_gpio != MY_GPIO_TEST)

                return gpio_get_value(boarddata->wp_gpio);

else

                return 0;

  }

        else

            return -ENOSYS;

}

However, I still see ESDHC_WP being set as HIGH all the time. I do not have JTAG for debugging this and everything is thru log messages and it is being very painful. If you guys have another suggestion this is very welcome.