forked from Minki/linux
Input: synaptics_i2c - change msleep to usleep_range for small msecs
msleep(1~20) may not do what the caller intends, and will often sleep longer. (~20 ms actual sleep for any value given in the 1~20ms range) This is not the desired behaviour for many cases like device resume time, device suspend time, device enable time, retry logic, etc. Thus, change msleep to usleep_range for precise wakeups. Signed-off-by: Aniroop Mathur <a.mathur@samsung.com> Acked-by: Igor Grinberg <grinberg@compulab.co.il> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
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@ -29,7 +29,7 @@
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* after soft reset, we should wait for 1 ms
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* before the device becomes operational
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*/
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#define SOFT_RESET_DELAY_MS 3
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#define SOFT_RESET_DELAY_US 3000
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/* and after hard reset, we should wait for max 500ms */
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#define HARD_RESET_DELAY_MS 500
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@ -311,7 +311,7 @@ static int synaptics_i2c_reset_config(struct i2c_client *client)
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if (ret) {
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dev_err(&client->dev, "Unable to reset device\n");
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} else {
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msleep(SOFT_RESET_DELAY_MS);
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usleep_range(SOFT_RESET_DELAY_US, SOFT_RESET_DELAY_US + 100);
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ret = synaptics_i2c_config(client);
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if (ret)
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dev_err(&client->dev, "Unable to config device\n");
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