diff options
| author | Arend Van Spriel <arend.vanspriel@broadcom.com> | 2018-01-09 13:22:53 +0100 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2018-01-11 19:34:47 +0200 |
| commit | 32adbcaa5df49f1977441f7a4bf180a0bcfe9966 (patch) | |
| tree | c70091f838b4ba6d75fbbabeb8d62812aeaee61d /drivers/net | |
| parent | c9aa7a91de740c537dc8c2f9f3d36fc651371b13 (diff) | |
| download | linux-32adbcaa5df49f1977441f7a4bf180a0bcfe9966.tar.bz2 | |
brcmfmac: add comment block in brcmf_sdio_buscore_read()
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 <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/sdio.c index 81eb776218bb..08686147b59d 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)) { |