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 <wg...@codeaurora.org>
---
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
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