From: Jarkko Nikula <jarkko.nikula@linux.intel.com>
To: linux-i2c@vger.kernel.org
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Mika Westerberg <mika.westerberg@linux.intel.com>,
Wolfram Sang <wsa@the-dreams.de>,
Luis Oliveira <Luis.Oliveira@synopsys.com>,
Jarkko Nikula <jarkko.nikula@linux.intel.com>
Subject: [PATCH] i2c: designware: Fix standard mode speed when configuring the slave mode
Date: Wed, 9 Aug 2017 15:24:44 +0300 [thread overview]
Message-ID: <20170809122444.13461-1-jarkko.nikula@linux.intel.com> (raw)
Code sets bit DW_IC_CON_SPEED_FAST (0x4) always when configuring the slave
mode. This results incorrect register value DW_IC_CON_SPEED_HIGH (0x6)
when OR'ed together with DW_IC_CON_SPEED_STD (0x2).
Remove this and let the code set the speed mode bits according to clock
frequency or default to fast mode.
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
---
drivers/i2c/busses/i2c-designware-platdrv.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c
index efb7191c6a6c..f55f2cdbbae3 100644
--- a/drivers/i2c/busses/i2c-designware-platdrv.c
+++ b/drivers/i2c/busses/i2c-designware-platdrv.c
@@ -198,8 +198,7 @@ static void i2c_dw_configure_slave(struct dw_i2c_dev *dev)
dev->functionality = I2C_FUNC_SLAVE | DW_IC_DEFAULT_FUNCTIONALITY;
dev->slave_cfg = DW_IC_CON_RX_FIFO_FULL_HLD_CTRL |
- DW_IC_CON_RESTART_EN | DW_IC_CON_STOP_DET_IFADDRESSED |
- DW_IC_CON_SPEED_FAST;
+ DW_IC_CON_RESTART_EN | DW_IC_CON_STOP_DET_IFADDRESSED;
dev->mode = DW_IC_SLAVE;
--
2.13.2
next reply other threads:[~2017-08-09 12:24 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-09 12:24 Jarkko Nikula [this message]
2017-08-14 19:13 ` [PATCH] i2c: designware: Fix standard mode speed when configuring the slave mode Wolfram Sang
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