1 Reply Latest reply on Jan 19, 2015 3:51 PM by nikvh

    BCM4334 wlan interface in Linux Kernel 3.12

      Dear Team,

            

                    We are working with BCM4334 with TI-AM335x Microprocessor with Linux-Kernel-3.12, driver related working are completed and when kernel starts we are getting an error "No SDIO Drive strength init done for chip 4334 rev 3 pmurev 17"


      We are running the BM4334 module in 3.3 I/O Voltage Level, then we found a patch from web for bcm4334 drive strength,

      below mentioned the patch details.


      +/* SDIO Drive Strength to sel value table for PMU Rev 17 (1.8v) */

      +static const struct sdiod_drive_str sdiod_drvstr_tab6_1v8[] = {

      +    {3, 0x3},

      +    {2, 0x2},

      +    {1, 0x1},

      +    {0, 0x0} };

      +

       

      +    case SDIOD_DRVSTR_KEY(BCM4334_CHIP_ID, 17):

      +         str_tab = sdiod_drvstr_tab6_1v8;

      +            str_mask = 0x00001800;

      +         str_shift = 11;

      +         break;

       

      Whether the mentioned patch is meant for 1.8V volt I/O or the same is ok with 3.3 I/O or else what is the configuration for 3.3 I/O Level.

       

      Regards

      Jithin@