From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tin Huynh Subject: [PATCH V1] i2c: designware: fix wrong tx/rx fifo for ACPI Date: Tue, 29 Nov 2016 10:32:07 +0700 Message-ID: <1480390327-24562-1-git-send-email-tnhuynh@apm.com> Return-path: Sender: linux-acpi-owner@vger.kernel.org To: Jarkko Nikula , Andy Shevchenko , Mika Westerberg , Wolfram Sang Cc: linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Loc Ho , Thang Nguyen , Phong Vo , patches@apm.com, Tin Huynh List-Id: linux-i2c@vger.kernel.org ACPI always sets txfifo and rxfifo to 32. This configuration will cause problem if the IP core supports a fifo size of 16 bytes only. Set the default value to 0 so the driver will get these parameters from IP core. Signed-off-by: Tin Huynh --- drivers/i2c/busses/i2c-designware-platdrv.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index 0b42a12..c88a4b8 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -97,8 +97,8 @@ static int dw_i2c_acpi_configure(struct platform_device *pdev) const struct acpi_device_id *id; dev->adapter.nr = -1; - dev->tx_fifo_depth = 32; - dev->rx_fifo_depth = 32; + dev->tx_fifo_depth = 0; + dev->rx_fifo_depth = 0; /* * Try to get SDA hold time and *CNT values from an ACPI method if -- 1.7.1