[PATCH v2 06/10] Bluetooth: btmtksdio: update register CSDIOCSR operation

[sean.wang at mediatek.com]

From: Sean Wang <sean.wang at mediatek.com>

That is a preliminary patch to introduce mt7921s support.

Update register CSDIOCSR operation that is suggested from the vendor
driver and is compatible to the all devices.

Co-developed-by: Mark-yw Chen <mark-yw.chen at mediatek.com>
Signed-off-by: Mark-yw Chen <mark-yw.chen at mediatek.com>
Signed-off-by: Sean Wang <sean.wang at mediatek.com>
---
 drivers/bluetooth/btmtksdio.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c
index f712b52e5797..3381c8844902 100644
--- a/drivers/bluetooth/btmtksdio.c
+++ b/drivers/bluetooth/btmtksdio.c
@@ -520,8 +520,12 @@ static int btmtksdio_open(struct hci_dev *hdev)
 	/* SDIO CMD 5 allows the SDIO device back to idle state an
 	 * synchronous interrupt is supported in SDIO 4-bit mode
 	 */
-	sdio_writel(bdev->func, SDIO_INT_CTL | SDIO_RE_INIT_EN,
-		    MTK_REG_CSDIOCSR, &err);
+	val = sdio_readl(bdev->func, MTK_REG_CSDIOCSR, &err);
+	if (err < 0)
+		goto err_release_irq;
+
+	val |= SDIO_INT_CTL;
+	sdio_writel(bdev->func, val, MTK_REG_CSDIOCSR, &err);
 	if (err < 0)
 		goto err_release_irq;
 
-- 
2.25.1