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ieee802154: add TX power control to wpan_phy

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Replace the current u8 transmit_power in wpan_phy with s8 transmit_power.
The u8 field contained the actual tx power and a tolerance field,
which no physical radio every used. Adjust sysfs entries to keep
compatibility with userspace, give tolerances of +-1dB statically there.

This patch only adds support for this in the at86rf230 driver and the
RF212 chip. Configuration calculation for RF212 is also somewhat basic,
but does the job - the RF212 datasheet gives a large table with
suggested values for combinations of TX power and page/channel, if this
does not work well, we might have to copy the whole table.

Signed-off-by: Phoebe Buckheister <phoebe.buckheister@itwm.fraunhofer.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Phoebe Buckheister
2014-02-17 11:34:08 +01:00
committed by David S. Miller
parent 5b520bbb53
commit 9b2777d608
10 changed files with 102 additions and 6 deletions
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6
include/net/wpan-phy.h
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@@ -37,14 +37,14 @@ struct wpan_phy {
struct mutex pib_lock;
/*
* This is a PIB according to 802.15.4-2006.
* This is a PIB according to 802.15.4-2011.
* We do not provide timing-related variables, as they
* aren't used outside of driver
*/
u8 current_channel;
u8 current_page;
u32 channels_supported[32];
u8 transmit_power;
s8 transmit_power;
u8 cca_mode;
struct device dev;
@@ -54,6 +54,8 @@ struct wpan_phy {
const char *name, int type);
void (*del_iface)(struct wpan_phy *phy, struct net_device *dev);
int (*set_txpower)(struct wpan_phy *phy, int db);
char priv[0] __attribute__((__aligned__(NETDEV_ALIGN)));
};