diff options
| author |   Dan Murphy <dmurphy@ti.com> | 2019-12-10 10:32:04 -0600 |
|---|---|---|
| committer |   Marc Kleine-Budde <mkl@pengutronix.de> | 2020-01-02 15:34:26 +0100 |
| commit | 3814ca3a10be795693e9d95142c69134c6189a9b (patch) | |
| tree | 583637747cd3736e9f298421917d68f0646164ce /drivers/net/can | |
| parent | can: tcan4x5x: tcan4x5x_can_probe(): get the device out of standby before register access (diff) | |
| download | linux-dev-3814ca3a10be795693e9d95142c69134c6189a9b.tar.xz linux-dev-3814ca3a10be795693e9d95142c69134c6189a9b.zip | |
can: tcan4x5x: tcan4x5x_can_probe(): turn on the power before parsing the config
The tcan4x5x_parse_config() function now performs action on the device
either reading or writing and a reset. If the devive has a switchable
power supppy (i.e. regulator is managed) it needs to be turned on.
So turn on the regulator if available. If the parsing fails, turn off
the regulator.
Fixes: 2de497356955 ("can: tcan45x: Make wake-up GPIO an optional GPIO")
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'drivers/net/can')
| -rw-r--r-- | drivers/net/can/m_can/tcan4x5x.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/drivers/net/can/m_can/tcan4x5x.c b/drivers/net/can/m_can/tcan4x5x.c index c9fb864fcfa1..a69476f5aec6 100644 --- a/drivers/net/can/m_can/tcan4x5x.c +++ b/drivers/net/can/m_can/tcan4x5x.c @@ -374,11 +374,6 @@ static int tcan4x5x_parse_config(struct m_can_classdev *cdev) if (IS_ERR(tcan4x5x->device_state_gpio)) tcan4x5x->device_state_gpio = NULL; - tcan4x5x->power = devm_regulator_get_optional(cdev->dev, - "vsup"); - if (PTR_ERR(tcan4x5x->power) == -EPROBE_DEFER) - return -EPROBE_DEFER; - return 0; } @@ -412,6 +407,12 @@ static int tcan4x5x_can_probe(struct spi_device *spi) if (!priv) return -ENOMEM; + priv->power = devm_regulator_get_optional(&spi->dev, "vsup"); + if (PTR_ERR(priv->power) == -EPROBE_DEFER) + return -EPROBE_DEFER; + else + priv->power = NULL; + mcan_class->device_data = priv; m_can_class_get_clocks(mcan_class); @@ -451,11 +452,13 @@ static int tcan4x5x_can_probe(struct spi_device *spi) priv->regmap = devm_regmap_init(&spi->dev, &tcan4x5x_bus, &spi->dev, &tcan4x5x_regmap); - ret = tcan4x5x_parse_config(mcan_class); + ret = tcan4x5x_power_enable(priv->power, 1); if (ret) goto out_clk; - tcan4x5x_power_enable(priv->power, 1); + ret = tcan4x5x_parse_config(mcan_class); + if (ret) + goto out_power; ret = tcan4x5x_init(mcan_class); if (ret) |