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Input: cyttsp - verbose error on soft reset 

The first thing the Cypress driver does when starting
up is to try a soft reset. This is the first point where
the driver SPI/I2C communication can fail, so put out some
nice debug text:

  cyttsp-spi spi2.0: failed to send soft reset

Instead of just:

  cyttsp-spi: probe of spi2.0 failed with error -5

This is more helpful.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210322221349.1116666-1-linus.walleij@linaro.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Linus Walleij 2021-03-22 20:25:26 -07:00 committed by Dmitry Torokhov
parent 55f2645c92
commit 84c36ab7a6
1 changed files with 8 additions and 5 deletions
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13
drivers/input/touchscreen/cyttsp_core.c
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@ -238,7 +238,6 @@ static void cyttsp_hard_reset(struct cyttsp *ts)
static int cyttsp_soft_reset(struct cyttsp *ts)
{
unsigned long timeout;
int retval;
/* wait for interrupt to set ready completion */
@ -248,12 +247,16 @@ static int cyttsp_soft_reset(struct cyttsp *ts)
enable_irq(ts->irq);
retval = ttsp_send_command(ts, CY_SOFT_RESET_MODE);
if (retval)
if (retval) {
dev_err(ts->dev, "failed to send soft reset\n");
goto out;
}
timeout = wait_for_completion_timeout(&ts->bl_ready,
msecs_to_jiffies(CY_DELAY_DFLT * CY_DELAY_MAX));
retval = timeout ? 0 : -EIO;
if (!wait_for_completion_timeout(&ts->bl_ready,
msecs_to_jiffies(CY_DELAY_DFLT * CY_DELAY_MAX))) {
dev_err(ts->dev, "timeout waiting for soft reset\n");
retval = -EIO;
}
out:
ts->state = CY_IDLE_STATE;