enable I2C devices behind I2C bus on Gen2

65 lines not on this page · raw message

index a76bc10..27dac3f 100644
@@ -18,6 +18,12 @@
 
 struct irq_domain;
 
+/* Matches ACPI PNP id, either _HID or _CID, or ACPI _ADR */
+struct mfd_cell_acpi_match {
+	const char			*pnpid;
+	const unsigned long long	adr;
+};
+
 /*
  * This struct describes the MFD part ("cell").
  * After registration the copy of this structure will become the platform data

@@ -44,8 +50,8 @@ struct mfd_cell {
 	 */
 	const char		*of_compatible;
 
-	/* Matches ACPI PNP id, either _HID or _CID */
-	const char		*acpi_pnpid;
+	/* Matches ACPI */
+	const struct mfd_cell_acpi_match	*acpi_match;
 
 	/*
 	 * These resources can be specified relative to the parent device.

index 1ce1603..958c134 100644
@@ -90,19 +90,19 @@ static struct resource intel_quark_gpio_res[] = {
 
 static struct mfd_cell intel_quark_mfd_cells[] = {
 	{
-		.id = MFD_I2C_BAR,
-		.name = "i2c_designware",
-		.num_resources = ARRAY_SIZE(intel_quark_i2c_res),
-		.resources = intel_quark_i2c_res,
-		.ignore_resource_conflicts = true,
-	},
-	{
 		.id = MFD_GPIO_BAR,
 		.name = "gpio-dwapb",
 		.num_resources = ARRAY_SIZE(intel_quark_gpio_res),
 		.resources = intel_quark_gpio_res,
 		.ignore_resource_conflicts = true,
 	},
+	{
+		.id = MFD_I2C_BAR,
+		.name = "i2c_designware",
+		.num_resources = ARRAY_SIZE(intel_quark_i2c_res),
+		.resources = intel_quark_i2c_res,
+		.ignore_resource_conflicts = true,
+	},
 };
 
 static const struct pci_device_id intel_quark_mfd_ids[] = {

@@ -248,12 +248,11 @@ static int intel_quark_mfd_probe(struct pci_dev *pdev,
 
 	dev_set_drvdata(&pdev->dev, quark_mfd);
 
-	ret = intel_quark_i2c_setup(pdev, &intel_quark_mfd_cells[MFD_I2C_BAR]);
+	ret = intel_quark_i2c_setup(pdev, &intel_quark_mfd_cells[1]);
 	if (ret)
 		return ret;
 
-	ret = intel_quark_gpio_setup(pdev,
-				     &intel_quark_mfd_cells[MFD_GPIO_BAR]);
+	ret = intel_quark_gpio_setup(pdev, &intel_quark_mfd_cells[0]);
 	if (ret)
 		return ret;
 

index 958c134..0421374 100644
@@ -31,6 +31,10 @@
 #define MFD_I2C_BAR		0
 #define MFD_GPIO_BAR		1
 
+/* ACPI _ADR value to match the child node */
+#define MFD_ACPI_MATCH_GPIO	0ULL
+#define MFD_ACPI_MATCH_I2C	1ULL
+
 /* The base GPIO number under GPIOLIB framework */
 #define INTEL_QUARK_MFD_GPIO_BASE	8
 

@@ -82,16 +86,25 @@ static struct resource intel_quark_i2c_res[] = {
 	},
 };
 
+static struct mfd_cell_acpi_match intel_quark_acpi_match_i2c = {
+	.adr = MFD_ACPI_MATCH_I2C,
+};
+
 static struct resource intel_quark_gpio_res[] = {
 	[INTEL_QUARK_IORES_MEM] = {
 		.flags = IORESOURCE_MEM,
 	},
 };
 
+static struct mfd_cell_acpi_match intel_quark_acpi_match_gpio = {
+	.adr = MFD_ACPI_MATCH_GPIO,
+};
+
 static struct mfd_cell intel_quark_mfd_cells[] = {
 	{
 		.id = MFD_GPIO_BAR,
 		.name = "gpio-dwapb",
+		.acpi_match = &intel_quark_acpi_match_gpio,
 		.num_resources = ARRAY_SIZE(intel_quark_gpio_res),
 		.resources = intel_quark_gpio_res,
 		.ignore_resource_conflicts = true,

@@ -99,6 +112,7 @@ static struct mfd_cell intel_quark_mfd_cells[] = {
 	{
 		.id = MFD_I2C_BAR,
 		.name = "i2c_designware",
+		.acpi_match = &intel_quark_acpi_match_i2c,
 		.num_resources = ARRAY_SIZE(intel_quark_i2c_res),
 		.resources = intel_quark_i2c_res,
 		.ignore_resource_conflicts = true,

index c6cb7f8..5d7c090 100644
@@ -21,6 +21,7 @@
 #include <linux/bitops.h>
 #include <linux/jiffies.h>
 #include <linux/of.h>
+#include <linux/acpi.h>
 #include <linux/i2c.h>
 #include <linux/platform_data/at24.h>
 

@@ -131,6 +132,12 @@ static const struct i2c_device_id at24_ids[] = {
 };
 MODULE_DEVICE_TABLE(i2c, at24_ids);
 
+static const struct acpi_device_id at24_acpi_ids[] = {
+	{ "INT3499", AT24_DEVICE_MAGIC(8192 / 8, 0) },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, at24_acpi_ids);
+
 /*-------------------------------------------------------------------------*/
 
 /*

@@ -467,21 +474,29 @@ static void at24_get_ofdata(struct i2c_client *client,
 static int at24_probe(struct i2c_client *client, const struct i2c_device_id *id)
 {
 	struct at24_platform_data chip;
+	kernel_ulong_t magic = 0;
 	bool writable;
 	int use_smbus = 0;
 	int use_smbus_write = 0;
 	struct at24_data *at24;
 	int err;
 	unsigned i, num_addresses;
-	kernel_ulong_t magic;
 
 	if (client->dev.platform_data) {
 		chip = *(struct at24_platform_data *)client->dev.platform_data;
 	} else {
-		if (!id->driver_data)
+		if (id) {
+			magic = id->driver_data;
+		} else {
+			const struct acpi_device_id *aid;
+
+			aid = acpi_match_device(at24_acpi_ids, &client->dev);
+			if (aid)
+				magic = aid->driver_data;
+		}
+		if (!magic)
 			return -ENODEV;
 
-		magic = id->driver_data;
 		chip.byte_len = BIT(magic & AT24_BITMASK(AT24_SIZE_BYTELEN));
 		magic >>= AT24_SIZE_BYTELEN;
 		chip.flags = magic & AT24_BITMASK(AT24_SIZE_FLAGS);

@@ -661,6 +676,7 @@ static int at24_remove(struct i2c_client *client)
 static struct i2c_driver at24_driver = {
 	.driver = {
 		.name = "at24",
+		.acpi_match_table = ACPI_PTR(at24_acpi_ids),
 	},
 	.probe = at24_probe,
 	.remove = at24_remove,

index 70448a6..117fccf 100644
@@ -19,9 +19,11 @@
  * this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include <linux/acpi.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/property.h>
 #include <linux/pwm.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>

@@ -297,7 +299,6 @@ static const struct regmap_config pca9685_regmap_i2c_config = {
 static int pca9685_pwm_probe(struct i2c_client *client,
 				const struct i2c_device_id *id)
 {
-	struct device_node *np = client->dev.of_node;
 	struct pca9685 *pca;
 	int ret;
 	int mode2;

@@ -320,12 +321,12 @@ static int pca9685_pwm_probe(struct i2c_client *client,
 
 	regmap_read(pca->regmap, PCA9685_MODE2, &mode2);
 
-	if (of_property_read_bool(np, "invert"))
+	if (device_property_read_bool(&client->dev, "invert"))
 		mode2 |= MODE2_INVRT;
 	else
 		mode2 &= ~MODE2_INVRT;
 
-	if (of_property_read_bool(np, "open-drain"))
+	if (device_property_read_bool(&client->dev, "open-drain"))
 		mode2 &= ~MODE2_OUTDRV;
 	else
 		mode2 |= MODE2_OUTDRV;

@@ -363,16 +364,27 @@ static const struct i2c_device_id pca9685_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, pca9685_id);
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id pca9685_acpi_ids[] = {
+	{ "INT3492", 0 },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(acpi, pca9685_acpi_ids);
+#endif
+
+#ifdef CONFIG_OF
 static const struct of_device_id pca9685_dt_ids[] = {
 	{ .compatible = "nxp,pca9685-pwm", },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, pca9685_dt_ids);
+#endif
 
 static struct i2c_driver pca9685_i2c_driver = {
 	.driver = {
 		.name = "pca9685-pwm",
-		.of_match_table = pca9685_dt_ids,
+		.acpi_match_table = ACPI_PTR(pca9685_acpi_ids),
+		.of_match_table = of_match_ptr(pca9685_dt_ids),
 	},
 	.probe = pca9685_pwm_probe,
 	.remove = pca9685_pwm_remove,