[RESEND,v3,2/2] NFC: nxp-nci: Add pad supply voltage pvdd-supply
Commit Message
PN547/553, QN310/330 chips on some devices require a pad supply voltage
(PVDD). Otherwise, the NFC won't power up.
Implement support for pad supply voltage pvdd-supply that is enabled by
the nxp-nci driver so that the regulator gets enabled when needed.
Signed-off-by: Raymond Hackley <raymondhackley@protonmail.com>
---
drivers/nfc/nxp-nci/i2c.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
Comments
On 09/06/2023 20:37, Raymond Hackley wrote:
> PN547/553, QN310/330 chips on some devices require a pad supply voltage
> (PVDD). Otherwise, the NFC won't power up.
>
> Implement support for pad supply voltage pvdd-supply that is enabled by
> the nxp-nci driver so that the regulator gets enabled when needed.
>
> Signed-off-by: Raymond Hackley <raymondhackley@protonmail.com>
> ---
> drivers/nfc/nxp-nci/i2c.c | 34 ++++++++++++++++++++++++++++++++++
> 1 file changed, 34 insertions(+)
>
> diff --git a/drivers/nfc/nxp-nci/i2c.c b/drivers/nfc/nxp-nci/i2c.c
> index d4c299be7949..6f01152d2c83 100644
> --- a/drivers/nfc/nxp-nci/i2c.c
> +++ b/drivers/nfc/nxp-nci/i2c.c
> @@ -35,6 +35,7 @@ struct nxp_nci_i2c_phy {
>
> struct gpio_desc *gpiod_en;
> struct gpio_desc *gpiod_fw;
> + struct regulator *pvdd;
>
> int hard_fault; /*
> * < 0 if hardware error occurred (e.g. i2c err)
> @@ -263,6 +264,20 @@ static const struct acpi_gpio_mapping acpi_nxp_nci_gpios[] = {
> { }
> };
>
> +static void nxp_nci_i2c_poweroff(void *data)
> +{
> + struct nxp_nci_i2c_phy *phy = data;
> + struct device *dev = &phy->i2c_dev->dev;
> + struct regulator *pvdd = phy->pvdd;
> + int r;
> +
> + if (!IS_ERR(pvdd) && regulator_is_enabled(pvdd)) {
> + r = regulator_disable(pvdd);
> + if (r < 0)
> + dev_warn(dev, "Failed to disable regulator pvdd: %d\n", r);
Why resending? This should be explained.
It's like third or fourth patchset today. You need to slow down.
Unresolved comments from v2, so I still don't agree with this. I don't
like that I have to write the same three times because you sent three
patchsets...
Best regards,
Krzysztof
@@ -35,6 +35,7 @@ struct nxp_nci_i2c_phy {
struct gpio_desc *gpiod_en;
struct gpio_desc *gpiod_fw;
+ struct regulator *pvdd;
int hard_fault; /*
* < 0 if hardware error occurred (e.g. i2c err)
@@ -263,6 +264,20 @@ static const struct acpi_gpio_mapping acpi_nxp_nci_gpios[] = {
{ }
};
+static void nxp_nci_i2c_poweroff(void *data)
+{
+ struct nxp_nci_i2c_phy *phy = data;
+ struct device *dev = &phy->i2c_dev->dev;
+ struct regulator *pvdd = phy->pvdd;
+ int r;
+
+ if (!IS_ERR(pvdd) && regulator_is_enabled(pvdd)) {
+ r = regulator_disable(pvdd);
+ if (r < 0)
+ dev_warn(dev, "Failed to disable regulator pvdd: %d\n", r);
+ }
+}
+
static int nxp_nci_i2c_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
@@ -298,6 +313,25 @@ static int nxp_nci_i2c_probe(struct i2c_client *client)
return PTR_ERR(phy->gpiod_fw);
}
+ phy->pvdd = devm_regulator_get_optional(dev, "pvdd");
+ if (IS_ERR(phy->pvdd)) {
+ r = PTR_ERR(phy->pvdd);
+ if (r != -ENODEV)
+ return dev_err_probe(dev, r, "Failed to get regulator pvdd\n");
+ } else {
+ r = regulator_enable(phy->pvdd);
+ if (r < 0) {
+ nfc_err(dev, "Failed to enable regulator pvdd: %d\n", r);
+ return r;
+ }
+ }
+
+ r = devm_add_action_or_reset(dev, nxp_nci_i2c_poweroff, phy);
+ if (r < 0) {
+ nfc_err(dev, "Failed to install poweroff handler: %d\n", r);
+ return r;
+ }
+
r = nxp_nci_probe(phy, &client->dev, &i2c_phy_ops,
NXP_NCI_I2C_MAX_PAYLOAD, &phy->ndev);
if (r < 0)