In brcmf_sdio_buscore_read() there is some special handling upon register access to chipid register of the chipcommon core. Add comment explaining why it is done here.
Signed-off-by: Arend van Spriel <[email protected]> --- drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c index 81eb776..0868614 100644 --- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c +++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c @@ -3772,6 +3772,13 @@ static u32 brcmf_sdio_buscore_read32(void *ctx, u32 addr) val = brcmf_sdiod_readl(sdiodev, addr, NULL); + /* + * this is a bit of special handling if reading the chipcommon chipid + * register. The 4339 is a next-gen of the 4335. It uses the same + * SDIO device id as 4335 and the chipid register returns 4335 as well. + * It can be identified as 4339 by looking at the chip revision. It + * is corrected here so the chip.c module has the right info. + */ if (addr == CORE_CC_REG(SI_ENUM_BASE, chipid) && (sdiodev->func1->device == SDIO_DEVICE_ID_BROADCOM_4339 || sdiodev->func1->device == SDIO_DEVICE_ID_BROADCOM_4335_4339)) { -- 1.9.1
