i2c: tegra: do bitbanging xfer if atomic xfer is required

If atomic context transfer is required then only do bit-banging
transfers.

bug 1451967
bug 1469284

Change-Id: Icd516610918fc4c59aef32ad154b763dd5418172
Signed-off-by: Chaitanya Bandi <bandik@nvidia.com>
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Reviewed-on: http://git-master/r/380933

diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index b1e69f0966df3d2e0ccca105fa8e9ee5db49cef1..64a58366d3b6766bbce8bc39bdf6af1c8039a01c 100644 (file)
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -1235,9 +1235,13 @@ static int tegra_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[],
        if (i2c_dev->is_suspended)
                return -EBUSY;
 
-       if (i2c_dev->is_shutdown && i2c_dev->bit_banging_xfer_after_shutdown)
+       if ((i2c_dev->is_shutdown || adap->atomic_xfer_only)
+               && i2c_dev->bit_banging_xfer_after_shutdown)
                return tegra_i2c_gpio_xfer(adap, msgs, num);
 
+       if (adap->atomic_xfer_only)
+               return -EBUSY;
+
        i2c_dev->msgs = msgs;
        i2c_dev->msgs_num = num;