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authorAlexandre Belloni <alexandre.belloni@bootlin.com>2018-08-31 17:11:10 +0200
committerWolfram Sang <wsa@the-dreams.de>2018-09-02 23:51:15 +0200
commitc7fa7aeff85cbd71c724e7a7b167c24356de9c5f (patch)
tree83f095e0bbc6cfbb2b5693dd46b178497c6798ed /drivers/i2c/busses/i2c-designware-common.c
parent96742775a3c0649b88140803737ffa1915eb4509 (diff)
downloadlinux-c7fa7aeff85cbd71c724e7a7b167c24356de9c5f.tar.bz2
i2c: designware: allow IP specific sda_hold_time
Because some old designware IPs were not supporting setting an SDA hold time, vendors developed their own solution. Add a way for the final driver to provide its own SDA hold time handling. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Diffstat (limited to 'drivers/i2c/busses/i2c-designware-common.c')
-rw-r--r--drivers/i2c/busses/i2c-designware-common.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/i2c/busses/i2c-designware-common.c b/drivers/i2c/busses/i2c-designware-common.c
index 69ec4a791f23..36271cd75342 100644
--- a/drivers/i2c/busses/i2c-designware-common.c
+++ b/drivers/i2c/busses/i2c-designware-common.c
@@ -201,6 +201,8 @@ int i2c_dw_set_sda_hold(struct dw_i2c_dev *dev)
dev_dbg(dev->dev, "SDA Hold Time TX:RX = %d:%d\n",
dev->sda_hold_time & ~(u32)DW_IC_SDA_HOLD_RX_MASK,
dev->sda_hold_time >> DW_IC_SDA_HOLD_RX_SHIFT);
+ } else if (dev->set_sda_hold_time) {
+ dev->set_sda_hold_time(dev);
} else if (dev->sda_hold_time) {
dev_warn(dev->dev,
"Hardware too old to adjust SDA hold time.\n");