Remove checking the wake pin for every read/write call.
The device is not explicitly put to sleep in the code
and the POR interrupt is cleared during the init of
the device.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Remove the data-ready gpio interrupt handling and use the spi->irq
that is created based on the interrupt DT property.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
In regmap_spi_gather_write() the "addr" is prepared. The chip expects
the number of 32 bit words to write in the lower 8 bits of addr. However
the number of byte to write in shifted left by 3 (== divided by 8).
The function tcan4x5x_regmap_write() is called with a data buffer, which
holds the register information in the first 32 bits, followed by the
actual data. tcan4x5x_regmap_write() calls regmap_spi_gather_write()
with the val pointer pointing to the actual data (i.e. the original
pointer is incremented by 4 bytes), but without decrementing the count.
If the regmap framework only calls tcan4x5x_regmap_write() to read
single 32 bit registers these two bugs cancel each other.
This patch fixes the code.
Fixes: 5443c226ba ("can: tcan4x5x: Add tcan4x5x driver to the kernel")
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This patch adds the missing error handling in tcan4x5x_can_probe() if
mcan_class is NULL.
Fixes: 5443c226ba ("can: tcan4x5x: Add tcan4x5x driver to the kernel")
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
The struct m_can_classdev::device_data is a void pointer, so there's no
need to cast it to struct tcan4x5x_priv *, when assigning the struct
tcan4x5x_priv pointer.
This patch removes the not needed casts from the tcan4x5x driver.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
The mutex struct tcan4x5x_priv::tcan4x5x_lock is unused in the driver,
so this patch removes the variable from the driver.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Add the TCAN4x5x SPI CAN driver.
This device uses the Bosch MCAN IP core along with a SPI interface map.
Register to the MCAN common core code to manage the MCAN IP.
This device has a special method to indicate a write/read operation on
the data payload.
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
