diff options
author | Christophe Ricard <christophe.ricard@gmail.com> | 2015-12-23 23:45:11 +0100 |
---|---|---|
committer | Samuel Ortiz <sameo@linux.intel.com> | 2015-12-29 19:06:17 +0100 |
commit | dfa8070d7f641e1fb1b5e5fe643faddfa4869e07 (patch) | |
tree | 1143d20cc5012543bce44a34af04caedc6077a1b /drivers/nfc | |
parent | 60cd6d89319f7f3854bad5f1bad570d9f135b03c (diff) | |
download | op-kernel-dev-dfa8070d7f641e1fb1b5e5fe643faddfa4869e07.zip op-kernel-dev-dfa8070d7f641e1fb1b5e5fe643faddfa4869e07.tar.gz |
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 <christophe-h.ricard@st.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/nfc')
-rw-r--r-- | drivers/nfc/st21nfca/i2c.c | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/drivers/nfc/st21nfca/i2c.c b/drivers/nfc/st21nfca/i2c.c index 831e20d..ae16534 100644 --- a/drivers/nfc/st21nfca/i2c.c +++ b/drivers/nfc/st21nfca/i2c.c @@ -21,8 +21,10 @@ #include <linux/module.h> #include <linux/i2c.h> #include <linux/gpio.h> +#include <linux/gpio/consumer.h> #include <linux/of_irq.h> #include <linux/of_gpio.h> +#include <linux/acpi.h> #include <linux/miscdevice.h> #include <linux/interrupt.h> #include <linux/delay.h> @@ -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, |