* [PATCH 0/2] NFC: nxp-nci: Add pad supply voltage pvdd-supply
@ 2023-06-06 7:24 Raymond Hackley
2023-06-06 7:25 ` [PATCH 1/2] dt-bindings: nfc: nxp-nci: document pvdd-supply Raymond Hackley
2023-06-06 7:25 ` [PATCH 2/2] NFC: nxp-nci: Add pad supply voltage pvdd-supply Raymond Hackley
0 siblings, 2 replies; 5+ messages in thread
From: Raymond Hackley @ 2023-06-06 7:24 UTC (permalink / raw)
To: linux-kernel
Cc: Krzysztof Kozlowski, David S . Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Rob Herring, Liam Girdwood,
Mark Brown, Michael Walle, Uwe Kleine-König, Jeremy Kerr,
Raymond Hackley, netdev, devicetree
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.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH 1/2] dt-bindings: nfc: nxp-nci: document pvdd-supply
2023-06-06 7:24 [PATCH 0/2] NFC: nxp-nci: Add pad supply voltage pvdd-supply Raymond Hackley
@ 2023-06-06 7:25 ` Raymond Hackley
2023-06-06 8:29 ` Krzysztof Kozlowski
2023-06-06 7:25 ` [PATCH 2/2] NFC: nxp-nci: Add pad supply voltage pvdd-supply Raymond Hackley
1 sibling, 1 reply; 5+ messages in thread
From: Raymond Hackley @ 2023-06-06 7:25 UTC (permalink / raw)
To: linux-kernel
Cc: Krzysztof Kozlowski, David S . Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Rob Herring, Liam Girdwood,
Mark Brown, Michael Walle, Uwe Kleine-König, Jeremy Kerr,
Raymond Hackley, netdev, devicetree
PN547/553, QN310/330 chips on some devices require a pad supply voltage
(PVDD). Otherwise, the NFC won't power up.
Document 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>
---
Documentation/devicetree/bindings/net/nfc/nxp,nci.yaml | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/nfc/nxp,nci.yaml b/Documentation/devicetree/bindings/net/nfc/nxp,nci.yaml
index 6924aff0b2c5..d5a4f935c2ce 100644
--- a/Documentation/devicetree/bindings/net/nfc/nxp,nci.yaml
+++ b/Documentation/devicetree/bindings/net/nfc/nxp,nci.yaml
@@ -25,6 +25,11 @@ properties:
firmware-gpios:
description: Output GPIO pin used to enter firmware download mode
+ pvdd-supply:
+ description: |
+ Optional regulator that provides pad supply voltage for some
+ controllers
+
interrupts:
maxItems: 1
--
2.30.2
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [PATCH 2/2] NFC: nxp-nci: Add pad supply voltage pvdd-supply
2023-06-06 7:24 [PATCH 0/2] NFC: nxp-nci: Add pad supply voltage pvdd-supply Raymond Hackley
2023-06-06 7:25 ` [PATCH 1/2] dt-bindings: nfc: nxp-nci: document pvdd-supply Raymond Hackley
@ 2023-06-06 7:25 ` Raymond Hackley
2023-06-08 4:36 ` Jakub Kicinski
1 sibling, 1 reply; 5+ messages in thread
From: Raymond Hackley @ 2023-06-06 7:25 UTC (permalink / raw)
To: linux-kernel
Cc: Krzysztof Kozlowski, David S . Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, Rob Herring, Liam Girdwood,
Mark Brown, Michael Walle, Uwe Kleine-König, Jeremy Kerr,
Raymond Hackley, netdev, devicetree
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 | 47 +++++++++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
diff --git a/drivers/nfc/nxp-nci/i2c.c b/drivers/nfc/nxp-nci/i2c.c
index d4c299be7949..e2d16111daa4 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 +264,22 @@ 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 +315,34 @@ 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) {
+ if (r != -EPROBE_DEFER)
+ dev_err(dev,
+ "Failed to get regulator pvdd: %d\n",
+ r);
+ return r;
+ }
+ } 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);
+ nxp_nci_i2c_poweroff(phy);
+ return r;
+ }
+
r = nxp_nci_probe(phy, &client->dev, &i2c_phy_ops,
NXP_NCI_I2C_MAX_PAYLOAD, &phy->ndev);
if (r < 0)
@@ -319,6 +364,8 @@ static void nxp_nci_i2c_remove(struct i2c_client *client)
nxp_nci_remove(phy->ndev);
free_irq(client->irq, phy);
+
+ nxp_nci_i2c_poweroff(phy);
}
static const struct i2c_device_id nxp_nci_i2c_id_table[] = {
--
2.30.2
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH 1/2] dt-bindings: nfc: nxp-nci: document pvdd-supply
2023-06-06 7:25 ` [PATCH 1/2] dt-bindings: nfc: nxp-nci: document pvdd-supply Raymond Hackley
@ 2023-06-06 8:29 ` Krzysztof Kozlowski
0 siblings, 0 replies; 5+ messages in thread
From: Krzysztof Kozlowski @ 2023-06-06 8:29 UTC (permalink / raw)
To: Raymond Hackley, linux-kernel
Cc: David S . Miller, Eric Dumazet, Jakub Kicinski, Paolo Abeni,
Rob Herring, Liam Girdwood, Mark Brown, Michael Walle,
Uwe Kleine-König, Jeremy Kerr, netdev, devicetree
On 06/06/2023 09:25, Raymond Hackley wrote:
> PN547/553, QN310/330 chips on some devices require a pad supply voltage
> (PVDD). Otherwise, the NFC won't power up.
>
> Document support for pad supply voltage pvdd-supply that is enabled by
> the nxp-nci driver so that the regulator gets enabled when needed.
>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH 2/2] NFC: nxp-nci: Add pad supply voltage pvdd-supply
2023-06-06 7:25 ` [PATCH 2/2] NFC: nxp-nci: Add pad supply voltage pvdd-supply Raymond Hackley
@ 2023-06-08 4:36 ` Jakub Kicinski
0 siblings, 0 replies; 5+ messages in thread
From: Jakub Kicinski @ 2023-06-08 4:36 UTC (permalink / raw)
To: Raymond Hackley
Cc: linux-kernel, Krzysztof Kozlowski, David S . Miller,
Eric Dumazet, Paolo Abeni, Rob Herring, Liam Girdwood,
Mark Brown, Michael Walle, Uwe Kleine-König, Jeremy Kerr,
netdev, devicetree
On Tue, 06 Jun 2023 07:25:55 +0000 Raymond Hackley wrote:
> + if (r != -EPROBE_DEFER)
> + dev_err(dev,
> + "Failed to get regulator pvdd: %d\n",
> + r);
> + return r;
dev_err_probe() ?
> + 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);
> + nxp_nci_i2c_poweroff(phy);
The _or_reset() stands for "we'll call the action for you if we can't
add it". Don't call poweroff again.
--
pw-bot: cr
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2023-06-08 4:36 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2023-06-06 7:24 [PATCH 0/2] NFC: nxp-nci: Add pad supply voltage pvdd-supply Raymond Hackley
2023-06-06 7:25 ` [PATCH 1/2] dt-bindings: nfc: nxp-nci: document pvdd-supply Raymond Hackley
2023-06-06 8:29 ` Krzysztof Kozlowski
2023-06-06 7:25 ` [PATCH 2/2] NFC: nxp-nci: Add pad supply voltage pvdd-supply Raymond Hackley
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