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    Subject[PATCH 5.13 491/800] mt76: mt7921: fix mt7921_wfsys_reset sequence
    Date
    From: Sean Wang <sean.wang@mediatek.com>

    [ Upstream commit 20eb83c749609199443972cf80fb6004fc36afc6 ]

    WiFi subsytem reset should control MT_WFSYS_SW_RST_B and then poll the
    same register until the bit WFSYS_SW_INIT_DONE bit is set.

    Fixes: 0c1ce9884607 ("mt76: mt7921: add wifi reset support")
    Reviewed-by: Lorenzo Bianconi <lorenzo@kernel.org>
    Signed-off-by: Sean Wang <sean.wang@mediatek.com>
    Signed-off-by: Felix Fietkau <nbd@nbd.name>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/net/wireless/mediatek/mt76/mt7921/dma.c | 6 +++---
    1 file changed, 3 insertions(+), 3 deletions(-)

    diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/dma.c b/drivers/net/wireless/mediatek/mt76/mt7921/dma.c
    index 71e664ee7652..bd9143dc865f 100644
    --- a/drivers/net/wireless/mediatek/mt76/mt7921/dma.c
    +++ b/drivers/net/wireless/mediatek/mt76/mt7921/dma.c
    @@ -313,9 +313,9 @@ static int mt7921_dma_reset(struct mt7921_dev *dev, bool force)

    int mt7921_wfsys_reset(struct mt7921_dev *dev)
    {
    - mt76_set(dev, 0x70002600, BIT(0));
    - msleep(200);
    - mt76_clear(dev, 0x70002600, BIT(0));
    + mt76_clear(dev, MT_WFSYS_SW_RST_B, WFSYS_SW_RST_B);
    + msleep(50);
    + mt76_set(dev, MT_WFSYS_SW_RST_B, WFSYS_SW_RST_B);

    if (!__mt76_poll_msec(&dev->mt76, MT_WFSYS_SW_RST_B,
    WFSYS_SW_INIT_DONE, WFSYS_SW_INIT_DONE, 500))
    --
    2.30.2


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