From dfa8070d7f641e1fb1b5e5fe643faddfa4869e07 Mon Sep 17 00:00:00 2001 From: Christophe Ricard Date: Wed, 23 Dec 2015 23:45:11 +0100 Subject: [PATCH] nfc: st21nfca: Add support for acpi probing for i2c device. Add support for acpi probing. SMO2100 is used for st21nfca It has been tested with the following acpi node on Minnowboard Max: Note: Remove uicc-present or ese-present Package if one them is not supported. Device (NFC1) { Name (_ADR, Zero) // _ADR: Address Name (_HID, "SMO2100") // _HID: Hardware ID Name (_CID, "SMO2100") // _CID: Compatible ID Name (_DDN, "SMO NFC") // _DDN: DOS Device Name Name (_UID, One) // _UID: Unique ID Name (_DSD, Package (0x02) { /* Device Properties for _DSD */ ToUUID ("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"), Package (0x02) { Package (0x02) { "uicc-present", 1 }, Package (0x02) { "ese-present", 1 } } }) Method (_CRS, 0, NotSerialized) // _CRS: Current Resource Settings { Name (SBUF, ResourceTemplate () { I2cSerialBus (0x0001, ControllerInitiated, 400000, AddressingMode7Bit, "\\_SB.I2C7", 0x00, ResourceConsumer, ,) GpioInt (Edge, ActiveHigh, ExclusiveAndWake, PullNone, 0x0000, "\\_SB.GPO2", 0x00, ResourceConsumer, ,) { // Pin list 0x0001 } GpioIo (Exclusive, PullDefault, 0x0000, 0x0000, IoRestrictionOutputOnly, "\\_SB.GPO2", 0x00, ResourceConsumer, ,) { // Pin list 0x0002, } }) Return (SBUF) /* \_SB_.I2C7.NFC1._CRS.SBUF */ } Method (_STA, 0, NotSerialized) // _STA: Status { Return (0x0F) } } Signed-off-by: Christophe Ricard Signed-off-by: Samuel Ortiz --- drivers/nfc/st21nfca/i2c.c | 51 +++++++++++++++++++++++++++++++++++++- 1 file changed, 50 insertions(+), 1 deletion(-) diff --git a/drivers/nfc/st21nfca/i2c.c b/drivers/nfc/st21nfca/i2c.c index 831e20d4da65..ae1653444549 100644 --- a/drivers/nfc/st21nfca/i2c.c +++ b/drivers/nfc/st21nfca/i2c.c @@ -21,8 +21,10 @@ #include #include #include +#include #include #include +#include #include #include #include @@ -205,7 +207,6 @@ static int st21nfca_hci_i2c_write(void *phy_id, struct sk_buff *skb) I2C_DUMP_SKB("st21nfca_hci_i2c_write", skb); - if (phy->hard_fault != 0) return phy->hard_fault; @@ -504,6 +505,41 @@ static struct nfc_phy_ops i2c_phy_ops = { .disable = st21nfca_hci_i2c_disable, }; +static int st21nfca_hci_i2c_acpi_request_resources(struct i2c_client *client) +{ + struct st21nfca_i2c_phy *phy = i2c_get_clientdata(client); + const struct acpi_device_id *id; + struct gpio_desc *gpiod_ena; + struct device *dev; + + if (!client) + return -EINVAL; + + dev = &client->dev; + + /* Match the struct device against a given list of ACPI IDs */ + id = acpi_match_device(dev->driver->acpi_match_table, dev); + if (!id) + return -ENODEV; + + /* Get EN GPIO from ACPI */ + gpiod_ena = devm_gpiod_get_index(dev, ST21NFCA_GPIO_NAME_EN, 1, + GPIOD_OUT_LOW); + if (!IS_ERR(gpiod_ena)) + phy->gpio_ena = desc_to_gpio(gpiod_ena); + + phy->gpio_ena = desc_to_gpio(gpiod_ena); + + phy->irq_polarity = irq_get_trigger_type(client->irq); + + phy->se_status.is_ese_present = + device_property_present(dev, "ese-present"); + phy->se_status.is_uicc_present = + device_property_present(dev, "uicc-present"); + + return 0; +} + static int st21nfca_hci_i2c_of_request_resources(struct i2c_client *client) { struct st21nfca_i2c_phy *phy = i2c_get_clientdata(client); @@ -617,6 +653,12 @@ static int st21nfca_hci_i2c_probe(struct i2c_client *client, nfc_err(&client->dev, "Cannot get platform resources\n"); return r; } + } else if (ACPI_HANDLE(&client->dev)) { + r = st21nfca_hci_i2c_acpi_request_resources(client); + if (r) { + nfc_err(&client->dev, "Cannot get ACPI data\n"); + return r; + } } else { nfc_err(&client->dev, "st21nfca platform resources not available\n"); return -ENODEV; @@ -665,6 +707,12 @@ static struct i2c_device_id st21nfca_hci_i2c_id_table[] = { }; MODULE_DEVICE_TABLE(i2c, st21nfca_hci_i2c_id_table); +static const struct acpi_device_id st21nfca_hci_i2c_acpi_match[] = { + {"SMO2100", 0}, + {} +}; +MODULE_DEVICE_TABLE(acpi, st21nfca_hci_i2c_acpi_match); + static const struct of_device_id of_st21nfca_i2c_match[] = { { .compatible = "st,st21nfca-i2c", }, { .compatible = "st,st21nfca_i2c", }, @@ -677,6 +725,7 @@ static struct i2c_driver st21nfca_hci_i2c_driver = { .owner = THIS_MODULE, .name = ST21NFCA_HCI_I2C_DRIVER_NAME, .of_match_table = of_match_ptr(of_st21nfca_i2c_match), + .acpi_match_table = ACPI_PTR(st21nfca_hci_i2c_acpi_match), }, .probe = st21nfca_hci_i2c_probe, .id_table = st21nfca_hci_i2c_id_table, -- 2.20.1