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[iwm] Only for family 7000 power-down busmaster DMA clocks when stopping.

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Taken-From: Linux iwlwifi

Obtained from:	DragonflyBSD commit 4c45994fcc77373ae2fb0901db15368c9731f641
This commit is contained in:
Adrian Chadd 2017-02-08 06:54:08 +00:00
parent 99baf303e7
commit d5722aae84
1 changed files with 6 additions and 5 deletions
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11
sys/dev/iwm/if_iwm.c
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@ -1401,11 +1401,12 @@ iwm_stop_device(struct iwm_softc *sc)
for (qid = 0; qid < nitems(sc->txq); qid++)
iwm_reset_tx_ring(sc, &sc->txq[qid]);
/*
* Power-down device's busmaster DMA clocks
*/
iwm_write_prph(sc, IWM_APMG_CLK_DIS_REG, IWM_APMG_CLK_VAL_DMA_CLK_RQT);
DELAY(5);
if (sc->cfg->device_family == IWM_DEVICE_FAMILY_7000) {
/* Power-down device's busmaster DMA clocks */
iwm_write_prph(sc, IWM_APMG_CLK_DIS_REG,
IWM_APMG_CLK_VAL_DMA_CLK_RQT);
DELAY(5);
}
/* Make sure (redundant) we've released our request to stay awake */
IWM_CLRBITS(sc, IWM_CSR_GP_CNTRL,