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.
Cc: Ferruh Yigit <fery@xxxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
drivers/input/touchscreen/cyttsp_core.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
index 73c854f35f33..b9772192b5ea 100644
--- a/drivers/input/touchscreen/cyttsp_core.c
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -248,12 +248,16 @@ 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 (retval)
+ dev_err(ts->dev, "timeout waiting for soft reset\n");
out:
ts->state = CY_IDLE_STATE;
--
2.29.2
