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dts file for TMDSEVM437X and WL1837MODCOM8I module

Alric Fitterer
Prodigy 120 points
Other Parts Discussed in Thread: WL1837MODCOM8I, TMDSEVM437X, WL1835, WL1271, WL1281, WL1283, WL1801, WL1831, WL1837

Hi all,


does a dts file exist for interfacing the WL1837MODCOM8I with TMDSEVM437X

if not, is it possible to get the schematic for the TMDSEVM437X rev 1.5B

Thanks,

amf

  • 0
    TI__Guru**** 161600 points

    Hi,

    I checked the am437x SDK2.00.00.00. Here is what is done for the wi fi module:

    &mmc3 {

      status = "okay";

      /* these are on the crossbar and are outlined in the

      xbar-event-map element */

      dmas = <&edma 30

      &edma 31>;

      dma-names = "tx", "rx";

      vmmc-supply = <&vmmcwl_fixed>;

      bus-width = <4>;

      pinctrl-names = "default", "sleep";

      pinctrl-0 = <&mmc3_pins_default>;

      pinctrl-1 = <&mmc3_pins_sleep>;

      cap-power-off-card;

      keep-power-in-suspend;

      ti,non-removable;

      #address-cells = <1>;

      #size-cells = <0>;

      wlcore: wlcore@0 {

              compatible = "ti,wl1835";

              reg = <2>;

              interrupt-parent = <&gpio1>;

              interrupts = <23 IRQ_TYPE_LEVEL_HIGH>;

      };

    };

    As you can see wlcore uses the drivers/net/wireless/ti/wlcore/sdio.c, this is because of the compatible = "ti,wl1835"; part. If you check the sdio.c driver, you'll find out, that it is compatible with the following wireless modules:

    #ifdef CONFIG_OF

    static const struct of_device_id wlcore_sdio_of_match_table[] = {

    { .compatible = "ti,wl1271" },

    { .compatible = "ti,wl1273" },

    { .compatible = "ti,wl1281" },

    { .compatible = "ti,wl1283" },

    { .compatible = "ti,wl1801" },

    { .compatible = "ti,wl1805" },

    { .compatible = "ti,wl1807" },

    { .compatible = "ti,wl1831" },

    { .compatible = "ti,wl1835" },

    { .compatible = "ti,wl1837" },

    { }

    };

    So yes, the DTS is compatible with the WL1837 chip, you just may need to change: compatible = "ti,wl1837"; in wlcore child node.

    As for the AM437x Schematics, they are located here:
    processors.wiki.ti.com/.../AM437X_EVM_Boards

    Hope this helps.

    Best Regards, 

  • 0 in reply to Yordan Kovachev
    Prodigy 10 points
    Hi Yordan,
    I use this ti-sdk-epos-am438x-02.02.00.15 SDK for am437x, but there is not the fuction of "wlcore_sdio_of_match_table[]" in the drivers/net/wireless/ti/wlcore/sdio.c .how can I config the dts to be compatible with the WL1837 chip?

    #ifdef CONFIG_OF
    static struct wl12xx_platform_data *wlcore_probe_of(struct device *dev)
    {
    struct device_node *np = dev->of_node;
    struct wl12xx_platform_data *pdata;

    if (!np || !of_device_is_compatible(np, "ti,wlcore")) {
    dev_err(dev, "No platform data set\n");
    return NULL;
    }

    pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
    if (!pdata) {
    dev_err(dev, "Can't allocate platform data\n");
    return NULL;
    }

    pdata->irq = irq_of_parse_and_map(np, 0);
    if (!pdata->irq) {
    dev_err(dev, "No irq in platform data\n");
    kfree(pdata);
    return NULL;
    }

    return pdata;
    }
    #else
    static struct wl12xx_platform_data *wlcore_probe_of(struct device *dev)
    {
    return NULL;
    }
    #endif

    Thanks!