[PATCH v2 04/10] Bluetooth: btmtksdio: explicitly set WHISR as write-1-clear
From: <sean.wang@mediatek.com>
Date: 2021-10-18 21:37:37
Also in:
linux-mediatek, lkml
Subsystem:
bluetooth drivers, the rest · Maintainers:
Marcel Holtmann, Luiz Augusto von Dentz, Linus Torvalds
From: Sean Wang <sean.wang@mediatek.com> That is a preliminary patch to introduce mt7921s support. Explicitly set WHISR as write-1-clear method to all devices that is the expected behavior the driver rely on. Co-developed-by: Mark-yw Chen <redacted> Signed-off-by: Mark-yw Chen <redacted> Signed-off-by: Sean Wang <sean.wang@mediatek.com> --- drivers/bluetooth/btmtksdio.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c
index 77d1c4ac582d..57126a95e292 100644
--- a/drivers/bluetooth/btmtksdio.c
+++ b/drivers/bluetooth/btmtksdio.c@@ -487,8 +487,8 @@ static void btmtksdio_interrupt(struct sdio_func *func) static int btmtksdio_open(struct hci_dev *hdev) { struct btmtksdio_dev *bdev = hci_get_drvdata(hdev); + u32 status, val; int err; - u32 status; sdio_claim_host(bdev->func);
@@ -533,8 +533,13 @@ static int btmtksdio_open(struct hci_dev *hdev) if (err < 0) goto err_release_irq; - /* Setup write-1-clear for CHISR register */ - sdio_writel(bdev->func, C_INT_CLR_CTRL, MTK_REG_CHCR, &err); + /* Explitly set write-1-clear method */ + val = sdio_readl(bdev->func, MTK_REG_CHCR, &err); + if (err < 0) + goto err_release_irq; + + val |= C_INT_CLR_CTRL; + sdio_writel(bdev->func, val, MTK_REG_CHCR, &err); if (err < 0) goto err_release_irq;
--
2.25.1