For sdio 3.0 chip, the clock will drop from 200M Hz to 50M Hz after load ath10k driver, it is because mmc_hw_reset will reset the sdio's power, then mmc will consider it as sdio 2.0 and drop the clock. Remove mmc_hw_reset will avoid the drop of clock. Tested with QCA6174 SDIO with firmware WLAN.RMH.4.4.1-00007-QCARMSWP-1. Signed-off-by: Wen Gong <wgong@xxxxxxxxxxxxxx> --- drivers/net/wireless/ath/ath10k/sdio.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/sdio.c b/drivers/net/wireless/ath/ath10k/sdio.c index fae56c6..f1d2af8 100644 --- a/drivers/net/wireless/ath/ath10k/sdio.c +++ b/drivers/net/wireless/ath/ath10k/sdio.c @@ -1433,10 +1433,6 @@ static void ath10k_sdio_hif_power_down(struct ath10k *ar) return; } - ret = mmc_hw_reset(ar_sdio->func->card->host); - if (ret) - ath10k_warn(ar, "unable to reset sdio: %d\n", ret); - sdio_release_host(ar_sdio->func); ar_sdio->is_disabled = true; -- 1.9.1
