diff mbox

[V5,4/3] brcmfmac: use wiphy_read_of_freq_limits to respect extra limits

Message ID 20170103225715.14072-4-zajec5@gmail.com (mailing list archive)
State Changes Requested
Delegated to: Johannes Berg
Headers show

Commit Message

Rafał Miłecki Jan. 3, 2017, 10:57 p.m. UTC 
From: Rafał Miłecki <rafal@milecki.pl>

There are some devices (e.g. Netgear R8000 home router) with one chipset
model used for different radios, some of them limited to subbands. NVRAM
entries don't contain any extra info on such limitations and firmware
reports full list of channels to us. We need to store extra limitation
info on DT to support such devices properly.

Now there is a cfg80211 helper for reading such info use it in brcmfmac.
This patch adds check for channel being disabled with orig_flags which
is how this wiphy helper works.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
This patch should probably go through wireless-driver-next which is why
it got weird number 4/3. I'm sending it just as a proof of concept.
It was succesfully tested on SmartRG SR400ac with BCM43602.

V4: Respect IEEE80211_CHAN_DISABLED in orig_flags
V5: Update commit message
---
 drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c | 4 ++++
 1 file changed, 4 insertions(+)

Comments

Rob Herring Jan. 4, 2017, 2:20 p.m. UTC | #1 
On Tue, Jan 03, 2017 at 11:57:15PM +0100, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@milecki.pl>
> 
> There are some devices (e.g. Netgear R8000 home router) with one chipset
> model used for different radios, some of them limited to subbands. NVRAM
> entries don't contain any extra info on such limitations and firmware
> reports full list of channels to us. We need to store extra limitation
> info on DT to support such devices properly.

This is the type of explanation that I'm looking for in the DT patch as 
well as the examples of where this data comes from now. Certainly, I 
think having per platform settings in userspace is not what you want.

Rob
diff mbox

Patch

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
index ccae3bb..f95e316 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/cfg80211.c
@@ -5886,6 +5886,9 @@  static int brcmf_construct_chaninfo(struct brcmf_cfg80211_info *cfg,
 						       band->band);
 		channel[index].hw_value = ch.control_ch_num;
 
+		if (channel->orig_flags & IEEE80211_CHAN_DISABLED)
+			continue;
+
 		/* assuming the chanspecs order is HT20,
 		 * HT40 upper, HT40 lower, and VHT80.
 		 */
@@ -6477,6 +6480,7 @@  static int brcmf_setup_wiphy(struct wiphy *wiphy, struct brcmf_if *ifp)
 			wiphy->bands[NL80211_BAND_5GHZ] = band;
 		}
 	}
+	wiphy_read_of_freq_limits(wiphy);
 	err = brcmf_setup_wiphybands(wiphy);
 	return err;
 }