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staging: brcm80211: use int_sqrt kernel function iso driver implementation

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The driver code had its own implementation for fixed point square root
calculation, but such a function is already available in the linux
kernel so the driver implementation has been removed using the kernel
function.

Cc: devel@linuxdriverproject.org
Cc: linux-wireless@vger.kernel.org
Reviewed-by: Roland Vossen <rvossen@broadcoom.com>
Reviewed-by: Henry Ptasinski <henryp@broadcom.com>
Reviewed-by: Brett Rudley <brudley@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Arend van Spriel 2011-05-09 16:33:25 +02:00 • committed by Greg Kroah-Hartman
parent 83dcec0904
commit dc1e961668
4 changed files with 2 additions and 22 deletions
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19
drivers/staging/brcm80211/brcmsmac/phy/wlc_phy_cmn.c
View file

@ -3117,25 +3117,6 @@ u8 wlc_phy_nbits(s32 value)
return nbits;
}
u32 wlc_phy_sqrt_int(u32 value)
{
u32 root = 0, shift = 0;
for (shift = 0; shift < 32; shift += 2) {
if (((0x40000000 >> shift) + root) <= value) {
value -= ((0x40000000 >> shift) + root);
root = (root >> 1) | (0x40000000 >> shift);
} else {
root = root >> 1;
}
}
if (root < value)
++root;
return root;
}
void wlc_phy_stf_chain_init(wlc_phy_t *pih, u8 txchain, u8 rxchain)
{
phy_info_t *pi = (phy_info_t *) pih;

1
drivers/staging/brcm80211/brcmsmac/phy/wlc_phy_int.h
View file

@ -1025,7 +1025,6 @@ extern void wlc_phy_txpower_update_shm(phy_info_t *pi);
extern void wlc_phy_cordic(fixed theta, cs32 *val);
extern u8 wlc_phy_nbits(s32 value);
extern u32 wlc_phy_sqrt_int(u32 value);
extern void wlc_phy_compute_dB(u32 *cmplx_pwr, s8 *p_dB, u8 core);
extern uint wlc_phy_init_radio_regs_allbands(phy_info_t *pi,

2
drivers/staging/brcm80211/brcmsmac/phy/wlc_phy_lcn.c
View file

@ -3244,7 +3244,7 @@ static bool wlc_lcnphy_calc_rx_iq_comp(phy_info_t *pi, u16 num_samps)
}
b /= temp;
b -= a * a;
b = (s32) wlc_phy_sqrt_int((u32) b);
b = (s32) int_sqrt((unsigned long) b);
b -= (1 << 10);
a0_new = (u16) (a & 0x3ff);
b0_new = (u16) (b & 0x3ff);

2
drivers/staging/brcm80211/brcmsmac/phy/wlc_phy_n.c
View file

@ -24608,7 +24608,7 @@ static void wlc_phy_calc_rx_iq_comp_nphy(phy_info_t *pi, u8 core_mask)
}
b /= temp;
b -= a * a;
b = (s32) wlc_phy_sqrt_int((u32) b);
b = (s32) int_sqrt((unsigned long) b);
b -= (1 << 10);
if ((curr_core == PHY_CORE_0) && (core_mask & 0x1)) {