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nfc: st-nci: Add support for acpi probing for spi device. 

Add support for acpi probing.
SMO2101 is used for st21nfcb

It has been tested with the following acpi node on Minnowboard:
Note: Remove uicc-present or ese-present Package if one of them is not
supported.

Device (NFC1)
{
	Name (_ADR, Zero)  // _ADR: Address
	Name (_HID, "SMO2101")  // _HID: Hardware ID
	Name (_CID, "SMO2101")  // _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 ()
		{
			SpiSerialBus (0, PolarityLow, FourWireMode, 8,
				      ControllerInitiated, 4000000, ClockPolarityLow,
				      ClockPhaseFirst, "\\_SB.SPI1",
				      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_.SPI1.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>
hifive-unleashed-5.1
Christophe Ricard 2015-12-23 23:45:10 +01:00 committed by Samuel Ortiz
parent ed6a2f3fb7
commit 60cd6d8931
1 changed files with 52 additions and 0 deletions
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52
drivers/nfc/st-nci/spi.c
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@ -20,8 +20,10 @@
#include <linux/module.h>
#include <linux/spi/spi.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/interrupt.h>
#include <linux/delay.h>
#include <linux/nfc.h>
@ -221,6 +223,43 @@ static struct nfc_phy_ops spi_phy_ops = {
.disable = st_nci_spi_disable,
};
static int st_nci_spi_acpi_request_resources(struct spi_device *spi_dev)
{
struct st_nci_spi_phy *phy = spi_get_drvdata(spi_dev);
const struct acpi_device_id *id;
struct gpio_desc *gpiod_reset;
struct device *dev;
if (!spi_dev)
return -EINVAL;
dev = &spi_dev->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 RESET GPIO from ACPI */
gpiod_reset = devm_gpiod_get_index(dev, ST_NCI_GPIO_NAME_RESET, 1,
GPIOD_OUT_HIGH);
if (IS_ERR(gpiod_reset)) {
nfc_err(dev, "Unable to get RESET GPIO\n");
return -ENODEV;
}
phy->gpio_reset = desc_to_gpio(gpiod_reset);
phy->irq_polarity = irq_get_trigger_type(spi_dev->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 st_nci_spi_of_request_resources(struct spi_device *dev)
{
struct st_nci_spi_phy *phy = spi_get_drvdata(dev);
@ -328,6 +367,12 @@ static int st_nci_spi_probe(struct spi_device *dev)
"Cannot get platform resources\n");
return r;
}
} else if (ACPI_HANDLE(&dev->dev)) {
r = st_nci_spi_acpi_request_resources(dev);
if (r) {
nfc_err(&dev->dev, "Cannot get ACPI data\n");
return r;
}
} else {
nfc_err(&dev->dev,
"st_nci platform resources not available\n");
@ -370,6 +415,12 @@ static struct spi_device_id st_nci_spi_id_table[] = {
};
MODULE_DEVICE_TABLE(spi, st_nci_spi_id_table);
static const struct acpi_device_id st_nci_spi_acpi_match[] = {
{"SMO2101", 0},
{}
};
MODULE_DEVICE_TABLE(acpi, st_nci_spi_acpi_match);
static const struct of_device_id of_st_nci_spi_match[] = {
{ .compatible = "st,st21nfcb-spi", },
{}
@ -380,6 +431,7 @@ static struct spi_driver st_nci_spi_driver = {
.driver = {
.name = ST_NCI_SPI_DRIVER_NAME,
.of_match_table = of_match_ptr(of_st_nci_spi_match),
.acpi_match_table = ACPI_PTR(st_nci_spi_acpi_match),
},
.probe = st_nci_spi_probe,
.id_table = st_nci_spi_id_table,