nWKRQ supports an output voltage of either the internal reference voltage
(3.6V) or the reference voltage of the digital interface 0 - 6V.
Add the devicetree option ti,nwkrq-voltage-sel to be able to select
between them.
Default is kept as the internal reference voltage.
Signed-off-by: Sean Nyekjaer <sean@geanix.com>
---
drivers/net/can/m_can/tcan4x5x-core.c | 35 +++++++++++++++++++++++++++++++++++
drivers/net/can/m_can/tcan4x5x.h | 2 ++
2 files changed, 37 insertions(+)
diff --git a/drivers/net/can/m_can/tcan4x5x-core.c b/drivers/net/can/m_can/tcan4x5x-core.c
index 2f73bf3abad889c222f15c39a3d43de1a1cf5fbb..264bba830be50033347056da994102f8b614e51b 100644
--- a/drivers/net/can/m_can/tcan4x5x-core.c
+++ b/drivers/net/can/m_can/tcan4x5x-core.c
@@ -92,6 +92,8 @@
#define TCAN4X5X_MODE_STANDBY BIT(6)
#define TCAN4X5X_MODE_NORMAL BIT(7)
+#define TCAN4X5X_NWKRQ_VOLTAGE_MASK BIT(19)
+
#define TCAN4X5X_DISABLE_WAKE_MSK (BIT(31) | BIT(30))
#define TCAN4X5X_DISABLE_INH_MSK BIT(9)
@@ -267,6 +269,11 @@ static int tcan4x5x_init(struct m_can_classdev *cdev)
if (ret)
return ret;
+ ret = regmap_update_bits(tcan4x5x->regmap, TCAN4X5X_CONFIG,
+ TCAN4X5X_NWKRQ_VOLTAGE_MASK, tcan4x5x->nwkrq_voltage);
+ if (ret)
+ return ret;
+
return ret;
}
@@ -318,6 +325,28 @@ static const struct tcan4x5x_version_info
return &tcan4x5x_versions[TCAN4X5X];
}
+static int tcan4x5x_get_dt_data(struct m_can_classdev *cdev)
+{
+ struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
+ struct device_node *np = cdev->dev->of_node;
+ u8 prop;
+ int ret;
+
+ ret = of_property_read_u8(np, "ti,nwkrq-voltage-sel", &prop);
+ if (!ret) {
+ if (prop <= 1)
+ tcan4x5x->nwkrq_voltage = prop;
+ else
+ dev_warn(cdev->dev,
+ "nwkrq-voltage-sel have invalid option: %u\n",
+ prop);
+ } else {
+ tcan4x5x->nwkrq_voltage = 0;
+ }
+
+ return 0;
+}
+
static int tcan4x5x_get_gpios(struct m_can_classdev *cdev,
const struct tcan4x5x_version_info *version_info)
{
@@ -453,6 +482,12 @@ static int tcan4x5x_can_probe(struct spi_device *spi)
goto out_power;
}
+ ret = tcan4x5x_get_dt_data(mcan_class);
+ if (ret) {
+ dev_err(&spi->dev, "Getting dt data failed %pe\n", ERR_PTR(ret));
+ goto out_power;
+ }
+
tcan4x5x_check_wake(priv);
ret = tcan4x5x_write_tcan_reg(mcan_class, TCAN4X5X_INT_EN, 0);
diff --git a/drivers/net/can/m_can/tcan4x5x.h b/drivers/net/can/m_can/tcan4x5x.h
index e62c030d3e1e5a713c997e7c8ecad4a44aff4e6a..04ebe5c64f4f7056a62e72e717cb85dd3817ab9c 100644
--- a/drivers/net/can/m_can/tcan4x5x.h
+++ b/drivers/net/can/m_can/tcan4x5x.h
@@ -42,6 +42,8 @@ struct tcan4x5x_priv {
struct tcan4x5x_map_buf map_buf_rx;
struct tcan4x5x_map_buf map_buf_tx;
+
+ u8 nwkrq_voltage;
};
static inline void
--
2.46.2On Mon. 11 Nov. 2024 at 17:55, Sean Nyekjaer <sean@geanix.com> wrote:
> nWKRQ supports an output voltage of either the internal reference voltage
> (3.6V) or the reference voltage of the digital interface 0 - 6V.
> Add the devicetree option ti,nwkrq-voltage-sel to be able to select
> between them.
> Default is kept as the internal reference voltage.
>
> Signed-off-by: Sean Nyekjaer <sean@geanix.com>
> ---
> drivers/net/can/m_can/tcan4x5x-core.c | 35 +++++++++++++++++++++++++++++++++++
> drivers/net/can/m_can/tcan4x5x.h | 2 ++
> 2 files changed, 37 insertions(+)
>
> diff --git a/drivers/net/can/m_can/tcan4x5x-core.c b/drivers/net/can/m_can/tcan4x5x-core.c
> index 2f73bf3abad889c222f15c39a3d43de1a1cf5fbb..264bba830be50033347056da994102f8b614e51b 100644
> --- a/drivers/net/can/m_can/tcan4x5x-core.c
> +++ b/drivers/net/can/m_can/tcan4x5x-core.c
> @@ -92,6 +92,8 @@
> #define TCAN4X5X_MODE_STANDBY BIT(6)
> #define TCAN4X5X_MODE_NORMAL BIT(7)
>
> +#define TCAN4X5X_NWKRQ_VOLTAGE_MASK BIT(19)
> +
> #define TCAN4X5X_DISABLE_WAKE_MSK (BIT(31) | BIT(30))
> #define TCAN4X5X_DISABLE_INH_MSK BIT(9)
>
> @@ -267,6 +269,11 @@ static int tcan4x5x_init(struct m_can_classdev *cdev)
> if (ret)
> return ret;
>
> + ret = regmap_update_bits(tcan4x5x->regmap, TCAN4X5X_CONFIG,
> + TCAN4X5X_NWKRQ_VOLTAGE_MASK, tcan4x5x->nwkrq_voltage);
> + if (ret)
> + return ret;
> +
> return ret;
> }
>
> @@ -318,6 +325,28 @@ static const struct tcan4x5x_version_info
> return &tcan4x5x_versions[TCAN4X5X];
> }
>
> +static int tcan4x5x_get_dt_data(struct m_can_classdev *cdev)
> +{
> + struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
> + struct device_node *np = cdev->dev->of_node;
> + u8 prop;
> + int ret;
> +
> + ret = of_property_read_u8(np, "ti,nwkrq-voltage-sel", &prop);
> + if (!ret) {
> + if (prop <= 1)
> + tcan4x5x->nwkrq_voltage = prop;
> + else
> + dev_warn(cdev->dev,
> + "nwkrq-voltage-sel have invalid option: %u\n",
> + prop);
> + } else {
> + tcan4x5x->nwkrq_voltage = 0;
> + }
If the
if (prop <= 1)
condition fails, you print a warning, but you are not assigning a
value to tcan4x5x->nwkrq_voltage. Is this intentional?
What about:
tcan4x5x->nwkrq_voltage = 0;
ret = of_property_read_u8(np, "ti,nwkrq-voltage-sel", &prop);
if (!ret) {
if (prop <= 1)
tcan4x5x->nwkrq_voltage = prop;
else
dev_warn(cdev->dev,
"nwkrq-voltage-sel have invalid option: %u\n",
prop);
}
so that you make sure that tcan4x5x->nwkrq_voltage always gets a
default zero value? Else, if you can make sure that tcan4x5x is always
zero initialized, you can just drop the
tcan4x5x->nwkrq_voltage = 0;
thing.
> + return 0;
> +}
> +
> static int tcan4x5x_get_gpios(struct m_can_classdev *cdev,
> const struct tcan4x5x_version_info *version_info)
> {
> @@ -453,6 +482,12 @@ static int tcan4x5x_can_probe(struct spi_device *spi)
> goto out_power;
> }
>
> + ret = tcan4x5x_get_dt_data(mcan_class);
> + if (ret) {
> + dev_err(&spi->dev, "Getting dt data failed %pe\n", ERR_PTR(ret));
> + goto out_power;
> + }
> +
> tcan4x5x_check_wake(priv);
>
> ret = tcan4x5x_write_tcan_reg(mcan_class, TCAN4X5X_INT_EN, 0);
> diff --git a/drivers/net/can/m_can/tcan4x5x.h b/drivers/net/can/m_can/tcan4x5x.h
> index e62c030d3e1e5a713c997e7c8ecad4a44aff4e6a..04ebe5c64f4f7056a62e72e717cb85dd3817ab9c 100644
> --- a/drivers/net/can/m_can/tcan4x5x.h
> +++ b/drivers/net/can/m_can/tcan4x5x.h
> @@ -42,6 +42,8 @@ struct tcan4x5x_priv {
>
> struct tcan4x5x_map_buf map_buf_rx;
> struct tcan4x5x_map_buf map_buf_tx;
> +
> + u8 nwkrq_voltage;
> };
>
> static inline void
>
> --
> 2.46.2
>
>
On 14.11.2024 13:53:34, Vincent Mailhol wrote:
> On Mon. 11 Nov. 2024 at 17:55, Sean Nyekjaer <sean@geanix.com> wrote:
> > nWKRQ supports an output voltage of either the internal reference voltage
> > (3.6V) or the reference voltage of the digital interface 0 - 6V.
> > Add the devicetree option ti,nwkrq-voltage-sel to be able to select
> > between them.
> > Default is kept as the internal reference voltage.
> >
> > Signed-off-by: Sean Nyekjaer <sean@geanix.com>
> > ---
> > drivers/net/can/m_can/tcan4x5x-core.c | 35 +++++++++++++++++++++++++++++++++++
> > drivers/net/can/m_can/tcan4x5x.h | 2 ++
> > 2 files changed, 37 insertions(+)
> >
> > diff --git a/drivers/net/can/m_can/tcan4x5x-core.c b/drivers/net/can/m_can/tcan4x5x-core.c
> > index 2f73bf3abad889c222f15c39a3d43de1a1cf5fbb..264bba830be50033347056da994102f8b614e51b 100644
> > --- a/drivers/net/can/m_can/tcan4x5x-core.c
> > +++ b/drivers/net/can/m_can/tcan4x5x-core.c
> > @@ -92,6 +92,8 @@
> > #define TCAN4X5X_MODE_STANDBY BIT(6)
> > #define TCAN4X5X_MODE_NORMAL BIT(7)
> >
> > +#define TCAN4X5X_NWKRQ_VOLTAGE_MASK BIT(19)
> > +
> > #define TCAN4X5X_DISABLE_WAKE_MSK (BIT(31) | BIT(30))
> > #define TCAN4X5X_DISABLE_INH_MSK BIT(9)
> >
> > @@ -267,6 +269,11 @@ static int tcan4x5x_init(struct m_can_classdev *cdev)
> > if (ret)
> > return ret;
> >
> > + ret = regmap_update_bits(tcan4x5x->regmap, TCAN4X5X_CONFIG,
> > + TCAN4X5X_NWKRQ_VOLTAGE_MASK, tcan4x5x->nwkrq_voltage);
> > + if (ret)
> > + return ret;
> > +
> > return ret;
> > }
> >
> > @@ -318,6 +325,28 @@ static const struct tcan4x5x_version_info
> > return &tcan4x5x_versions[TCAN4X5X];
> > }
> >
> > +static int tcan4x5x_get_dt_data(struct m_can_classdev *cdev)
> > +{
> > + struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
> > + struct device_node *np = cdev->dev->of_node;
> > + u8 prop;
> > + int ret;
> > +
> > + ret = of_property_read_u8(np, "ti,nwkrq-voltage-sel", &prop);
> > + if (!ret) {
> > + if (prop <= 1)
> > + tcan4x5x->nwkrq_voltage = prop;
> > + else
> > + dev_warn(cdev->dev,
> > + "nwkrq-voltage-sel have invalid option: %u\n",
> > + prop);
> > + } else {
> > + tcan4x5x->nwkrq_voltage = 0;
> > + }
>
> If the
>
> if (prop <= 1)
>
> condition fails, you print a warning, but you are not assigning a
> value to tcan4x5x->nwkrq_voltage. Is this intentional?
>
> What about:
>
> tcan4x5x->nwkrq_voltage = 0;
> ret = of_property_read_u8(np, "ti,nwkrq-voltage-sel", &prop);
> if (!ret) {
> if (prop <= 1)
> tcan4x5x->nwkrq_voltage = prop;
> else
> dev_warn(cdev->dev,
> "nwkrq-voltage-sel have invalid option: %u\n",
> prop);
> }
>
> so that you make sure that tcan4x5x->nwkrq_voltage always gets a
> default zero value? Else, if you can make sure that tcan4x5x is always
> zero initialized, you can just drop the
The tcan4x5x_priv is allocated in the netdev priv, which is initialized
with 0x0.
>
> tcan4x5x->nwkrq_voltage = 0;
>
> thing.
regards,
Marc
--
Pengutronix e.K. | Marc Kleine-Budde |
Embedded Linux | https://www.pengutronix.de |
Vertretung Nürnberg | Phone: +49-5121-206917-129 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-9 |
Hi Vincent,
On Thu, Nov 14, 2024 at 01:53:34PM +0100, Vincent Mailhol wrote:
> On Mon. 11 Nov. 2024 at 17:55, Sean Nyekjaer <sean@geanix.com> wrote:
> > nWKRQ supports an output voltage of either the internal reference voltage
> > (3.6V) or the reference voltage of the digital interface 0 - 6V.
> > Add the devicetree option ti,nwkrq-voltage-sel to be able to select
> > between them.
> > Default is kept as the internal reference voltage.
> >
> > Signed-off-by: Sean Nyekjaer <sean@geanix.com>
> > ---
> > drivers/net/can/m_can/tcan4x5x-core.c | 35 +++++++++++++++++++++++++++++++++++
> > drivers/net/can/m_can/tcan4x5x.h | 2 ++
> > 2 files changed, 37 insertions(+)
> >
[...]
> >
> > +static int tcan4x5x_get_dt_data(struct m_can_classdev *cdev)
> > +{
> > + struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
> > + struct device_node *np = cdev->dev->of_node;
> > + u8 prop;
> > + int ret;
> > +
> > + ret = of_property_read_u8(np, "ti,nwkrq-voltage-sel", &prop);
> > + if (!ret) {
> > + if (prop <= 1)
> > + tcan4x5x->nwkrq_voltage = prop;
> > + else
> > + dev_warn(cdev->dev,
> > + "nwkrq-voltage-sel have invalid option: %u\n",
> > + prop);
> > + } else {
> > + tcan4x5x->nwkrq_voltage = 0;
> > + }
>
> If the
>
> if (prop <= 1)
>
> condition fails, you print a warning, but you are not assigning a
> value to tcan4x5x->nwkrq_voltage. Is this intentional?
>
> What about:
>
> tcan4x5x->nwkrq_voltage = 0;
> ret = of_property_read_u8(np, "ti,nwkrq-voltage-sel", &prop);
> if (!ret) {
> if (prop <= 1)
> tcan4x5x->nwkrq_voltage = prop;
> else
> dev_warn(cdev->dev,
> "nwkrq-voltage-sel have invalid option: %u\n",
> prop);
> }
>
> so that you make sure that tcan4x5x->nwkrq_voltage always gets a
> default zero value? Else, if you can make sure that tcan4x5x is always
> zero initialized, you can just drop the
>
> tcan4x5x->nwkrq_voltage = 0;
>
> thing.
Thanks for the review.
You are right, so I reworked this for v3:
https://lore.kernel.org/r/20241112-tcan-wkrqv-v3-0-c66423fba26d@geanix.com
>
> > + return 0;
> > +}
> > +
[...]
> >
> >
/Sean
On Thu. 14 Nov. 2024 at 16:33, Sean Nyekjaer <sean@geanix.com> wrote:
> Hi Vincent,
> On Thu, Nov 14, 2024 at 01:53:34PM +0100, Vincent Mailhol wrote:
> > On Mon. 11 Nov. 2024 at 17:55, Sean Nyekjaer <sean@geanix.com> wrote:
> > > nWKRQ supports an output voltage of either the internal reference voltage
> > > (3.6V) or the reference voltage of the digital interface 0 - 6V.
> > > Add the devicetree option ti,nwkrq-voltage-sel to be able to select
> > > between them.
> > > Default is kept as the internal reference voltage.
> > >
> > > Signed-off-by: Sean Nyekjaer <sean@geanix.com>
> > > ---
> > > drivers/net/can/m_can/tcan4x5x-core.c | 35 +++++++++++++++++++++++++++++++++++
> > > drivers/net/can/m_can/tcan4x5x.h | 2 ++
> > > 2 files changed, 37 insertions(+)
> > >
>
> [...]
>
> > >
> > > +static int tcan4x5x_get_dt_data(struct m_can_classdev *cdev)
> > > +{
> > > + struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
> > > + struct device_node *np = cdev->dev->of_node;
> > > + u8 prop;
> > > + int ret;
> > > +
> > > + ret = of_property_read_u8(np, "ti,nwkrq-voltage-sel", &prop);
> > > + if (!ret) {
> > > + if (prop <= 1)
> > > + tcan4x5x->nwkrq_voltage = prop;
> > > + else
> > > + dev_warn(cdev->dev,
> > > + "nwkrq-voltage-sel have invalid option: %u\n",
> > > + prop);
> > > + } else {
> > > + tcan4x5x->nwkrq_voltage = 0;
> > > + }
> >
> > If the
> >
> > if (prop <= 1)
> >
> > condition fails, you print a warning, but you are not assigning a
> > value to tcan4x5x->nwkrq_voltage. Is this intentional?
> >
> > What about:
> >
> > tcan4x5x->nwkrq_voltage = 0;
> > ret = of_property_read_u8(np, "ti,nwkrq-voltage-sel", &prop);
> > if (!ret) {
> > if (prop <= 1)
> > tcan4x5x->nwkrq_voltage = prop;
> > else
> > dev_warn(cdev->dev,
> > "nwkrq-voltage-sel have invalid option: %u\n",
> > prop);
> > }
> >
> > so that you make sure that tcan4x5x->nwkrq_voltage always gets a
> > default zero value? Else, if you can make sure that tcan4x5x is always
> > zero initialized, you can just drop the
> >
> > tcan4x5x->nwkrq_voltage = 0;
> >
> > thing.
>
> Thanks for the review.
> You are right, so I reworked this for v3:
> https://lore.kernel.org/r/20241112-tcan-wkrqv-v3-0-c66423fba26d@geanix.com
I see. So this v2 was already outdated at the time of my review. Well,
glad to hear that this was proactively fixed in the v3 and sorry for
missing that.
Yours sincerely,
Vincent Mailhol
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