107 lines
3.2 KiB
Diff
107 lines
3.2 KiB
Diff
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From 876826de0f1ccbc148c3116bb9cb10b084dbd34d Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Ond=C5=99ej=20Jirman?= <megi@xff.cz>
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Date: Fri, 10 Nov 2017 14:29:26 +0100
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Subject: [PATCH 012/464] nfc: pn544: Add support for VBAT/PVDD regulators
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Regulators are required, so this can't go into mainline as is.
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Signed-off-by: Ondrej Jirman <megi@xff.cz>
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---
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drivers/nfc/pn544/i2c.c | 31 +++++++++++++++++++++++++++++--
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1 file changed, 29 insertions(+), 2 deletions(-)
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diff --git a/drivers/nfc/pn544/i2c.c b/drivers/nfc/pn544/i2c.c
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index 3f6d74832bac..ed6ade728f55 100644
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--- a/drivers/nfc/pn544/i2c.c
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+++ b/drivers/nfc/pn544/i2c.c
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@@ -16,6 +16,7 @@
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#include <linux/nfc.h>
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#include <linux/firmware.h>
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#include <linux/gpio/consumer.h>
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+#include <linux/regulator/consumer.h>
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#include <asm/unaligned.h>
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@@ -59,6 +60,14 @@ MODULE_DEVICE_TABLE(acpi, pn544_hci_i2c_acpi_match);
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#define PN544_HCI_I2C_DRIVER_NAME "pn544_hci_i2c"
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+/* regulator supplies */
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+static const char * const pn544_supply_names[] = {
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+ "PVDD", /* Digital Core (1.8V) supply */
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+ "VBAT", /* Analog (2.9V-5.5V) supply */
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+};
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+
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+#define PN544_NUM_SUPPLIES ARRAY_SIZE(pn544_supply_names)
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+
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/*
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* Exposed through the 4 most significant bytes
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* from the HCI SW_VERSION first byte, a.k.a.
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@@ -150,6 +159,7 @@ struct pn544_i2c_phy {
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struct i2c_client *i2c_dev;
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struct nfc_hci_dev *hdev;
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+ struct regulator_bulk_data supplies[PN544_NUM_SUPPLIES];
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struct gpio_desc *gpiod_en;
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struct gpio_desc *gpiod_fw;
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@@ -240,6 +250,13 @@ static void pn544_hci_i2c_enable_mode(struct pn544_i2c_phy *phy, int run_mode)
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static int pn544_hci_i2c_enable(void *phy_id)
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{
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struct pn544_i2c_phy *phy = phy_id;
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+ int ret;
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+
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+ pr_info("%s\n", __func__);
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+
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+ ret = regulator_bulk_enable(PN544_NUM_SUPPLIES, phy->supplies);
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+ if (ret)
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+ return ret;
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pn544_hci_i2c_enable_mode(phy, PN544_HCI_MODE);
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@@ -262,6 +279,8 @@ static void pn544_hci_i2c_disable(void *phy_id)
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gpiod_set_value_cansleep(phy->gpiod_en, !phy->en_polarity);
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usleep_range(10000, 15000);
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+ regulator_bulk_disable(PN544_NUM_SUPPLIES, phy->supplies);
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+
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phy->powered = 0;
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}
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@@ -368,7 +387,7 @@ static int pn544_hci_i2c_read(struct pn544_i2c_phy *phy, struct sk_buff **skb)
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if ((len < (PN544_HCI_I2C_LLC_MIN_SIZE - 1)) ||
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(len > (PN544_HCI_I2C_LLC_MAX_SIZE - 1))) {
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- nfc_err(&client->dev, "invalid len byte\n");
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+ nfc_err(&client->dev, "invalid len byte %hhx\n", len);
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r = -EBADMSG;
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goto flush;
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}
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@@ -870,7 +889,7 @@ static int pn544_hci_i2c_probe(struct i2c_client *client)
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{
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struct device *dev = &client->dev;
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struct pn544_i2c_phy *phy;
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- int r = 0;
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+ int r = 0, i;
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
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nfc_err(&client->dev, "Need I2C_FUNC_I2C\n");
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@@ -892,6 +911,14 @@ static int pn544_hci_i2c_probe(struct i2c_client *client)
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if (r)
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dev_dbg(dev, "Unable to add GPIO mapping table\n");
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+ for (i = 0; i < PN544_NUM_SUPPLIES; i++)
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+ phy->supplies[i].supply = pn544_supply_names[i];
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+
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+ r = devm_regulator_bulk_get(&client->dev, PN544_NUM_SUPPLIES,
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+ phy->supplies);
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+ if (r)
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+ return r;
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+
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/* Get EN GPIO */
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phy->gpiod_en = devm_gpiod_get(dev, "enable", GPIOD_OUT_LOW);
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if (IS_ERR(phy->gpiod_en)) {
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--
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2.34.1
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