Re: [PATCH v2 bluetooth-next] ieee802154: add set transmit power support

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Hi Alex,

On 05/26/2015 02:28 PM, Alexander Aring wrote:

On Mon, May 25, 2015 at 10:46:40AM +0530, Varka Bhadram wrote:
Hi,

On 05/24/2015 08:16 PM, Varka Bhadram wrote:

This patch adds transmission power setting support for IEEE-802.15.4
devices via nl802154.

Signed-off-by: Varka Bhadram <varkab@xxxxxxx>
---
  include/net/cfg802154.h   |    1 +
  net/ieee802154/nl802154.c |   21 +++++++++++++++++++++
  net/ieee802154/rdev-ops.h |   12 ++++++++++++
  net/ieee802154/trace.h    |   15 +++++++++++++++
  net/mac802154/cfg.c       |   19 +++++++++++++++++++
  5 files changed, 68 insertions(+)

diff --git a/include/net/cfg802154.h b/include/net/cfg802154.h
index 4de59aa..2e3bb01 100644
--- a/include/net/cfg802154.h
+++ b/include/net/cfg802154.h
@@ -44,6 +44,7 @@ struct cfg802154_ops {
  	int	(*set_channel)(struct wpan_phy *wpan_phy, u8 page, u8 channel);
  	int	(*set_cca_mode)(struct wpan_phy *wpan_phy,
  				const struct wpan_phy_cca *cca);
+	int     (*set_tx_power)(struct wpan_phy *wpan_phy, s32 power);
  	int	(*set_pan_id)(struct wpan_phy *wpan_phy,
  			      struct wpan_dev *wpan_dev, __le16 pan_id);
  	int	(*set_short_addr)(struct wpan_phy *wpan_phy,
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index 54f4959..42bc3d7 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -783,6 +783,19 @@ static int nl802154_set_cca_mode(struct sk_buff *skb, struct genl_info *info)
  	return rdev_set_cca_mode(rdev, &cca);
  }
+static int nl802154_set_tx_power(struct sk_buff *skb, struct genl_info *info)
+{
+	struct cfg802154_registered_device *rdev = info->user_ptr[0];
+	s32 power;
+
+	if (!info->attrs[NL802154_ATTR_TX_POWER])
+		return -EINVAL;
+
+	/* Collecting dBm value and converting to mBm*/
+	power = nla_get_s8(info->attrs[NL802154_ATTR_TX_POWER]) * 100;
I have noticed that wpan-tools converting the dBm value into mBm
and sending over netlinks. In this case i should remove the conversion
from dBm to mBm.

power = nla_get_s32(info->attrs[NL802154_ATTR_TX_POWER]);

I think above one is fine.

Do you think that conversion of dBm to mBm at userspace level is fine ..?
yes, "make it so".

Ok. Do you have any comments on this patch ?

--
Varka Bhadram

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