linux-kernel - [PATCH v1 06/10] Bluetooth: btmtksdio: update register CSDIOCSR operation

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Date:   Sat, 9 Oct 2021 06:10:13 +0800
From:   <sean.wang@...iatek.com>
To:     <marcel@...tmann.org>, <johan.hedberg@...il.com>
CC:     <Mark-YW.Chen@...iatek.com>, <sean.wang@...iatek.com>,
        <Soul.Huang@...iatek.com>, <YN.Chen@...iatek.com>,
        <Leon.Yen@...iatek.com>, <Eric-SY.Chang@...iatek.com>,
        <Deren.Wu@...iatek.com>, <km.lin@...iatek.com>,
        <robin.chiu@...iatek.com>, <Eddie.Chen@...iatek.com>,
        <ch.yeh@...iatek.com>, <posh.sun@...iatek.com>,
        <ted.huang@...iatek.com>, <Eric.Liang@...iatek.com>,
        <Stella.Chang@...iatek.com>, <Tom.Chou@...iatek.com>,
        <steve.lee@...iatek.com>, <jsiuda@...gle.com>,
        <frankgor@...gle.com>, <jemele@...gle.com>,
        <abhishekpandit@...gle.com>, <michaelfsun@...gle.com>,
        <mcchou@...omium.org>, <shawnku@...gle.com>,
        <linux-bluetooth@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Mark-yw Chen <mark-yw.chen@...iatek.com>
Subject: [PATCH v1 06/10] Bluetooth: btmtksdio: update register CSDIOCSR operation

From: Sean Wang <sean.wang@...iatek.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@...iatek.com>
Signed-off-by: Mark-yw Chen <mark-yw.chen@...iatek.com>
Signed-off-by: Sean Wang <sean.wang@...iatek.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