New patch to review for coreboot: drivers/i2c: Pass in i2c_generic_config into i2c_generic_fill_ssdt

[Furquan Shaikh]

Furquan Shaikh ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17857

-gerrit

commit 407b6d1640f2f0dce3575375f6a41c59b0380179
Author: Furquan Shaikh 
Date:   Tue Dec 13 21:50:32 2016 -0800

drivers/i2c: Pass in i2c_generic_config into i2c_generic_fill_ssdt

Remove any assumptions required for the drivers using i2c_generic to
    have drivers_i2c_generic_config structure at the start of the driver
    config. Instead prepare a structure i2c_generic_fill_options with
    pointers to device, drivers_i2c_generic_config and callback (if any
    required) by the calling device.

Change-Id: I51dc4cad1c1f246b51891abf7115a7120e87b098
    Signed-off-by: Furquan Shaikh 
---
 src/drivers/i2c/alps/alps.c       |  7 +++++++
 src/drivers/i2c/generic/chip.h    | 13 +++++++------
 src/drivers/i2c/generic/generic.c | 16 ++++++++++------
 src/drivers/i2c/wacom/wacom.c     |  8 +++++++-
 4 files changed, 31 insertions(+), 13 deletions(-)

diff --git a/src/drivers/i2c/alps/alps.c b/src/drivers/i2c/alps/alps.c
index 2686f6c..945fc7e 100644
--- a/src/drivers/i2c/alps/alps.c
+++ b/src/drivers/i2c/alps/alps.c
@@ -30,6 +30,13 @@ static void i2c_alps_fill_dsm(struct device *dev)

static void i2c_alps_fill_ssdt_generator(struct device *dev)
 {
+	struct drivers_i2c_alps_config *config = dev->chip_info;
+	const struct i2c_generic_fill_options opt = {
+		.dev = dev,
+		.config = &config->generic,
+		.callback = i2c_alps_fill_dsm,
+	};
+
    i2c_generic_fill_ssdt(dev, &i2c_alps_fill_dsm);
 }

diff --git a/src/drivers/i2c/generic/chip.h b/src/drivers/i2c/generic/chip.h
index 736de51..e438c5c 100644
--- a/src/drivers/i2c/generic/chip.h
+++ b/src/drivers/i2c/generic/chip.h
@@ -52,16 +52,17 @@ struct drivers_i2c_generic_config {
    unsigned enable_delay_ms;
 };

+struct i2c_generic_fill_options {
+	struct device *dev;
+	struct drivers_i2c_generic_config *config;
+	void (*callback)(struct device *dev);
+};
+
 /*
  * Fills in generic information about i2c device from device-tree
  * properties. Callback can be provided to fill in any
  * device-specific information in SSDT.
- *
- * Drivers calling into this function to generate should place
- * drivers_i2c_generic_config structure at the beginning of their device config
- * structure.
  */
-void i2c_generic_fill_ssdt(struct device *dev,
-			   void (*callback)(struct device *dev));
+void i2c_generic_fill_ssdt(const struct i2c_generic_fill_options *opt);

#endif /* __I2C_GENERIC_CHIP_H__ */
diff --git a/src/drivers/i2c/generic/generic.c b/src/drivers/i2c/generic/generic.c
index b8e5d86..9211ab0 100644
--- a/src/drivers/i2c/generic/generic.c
+++ b/src/drivers/i2c/generic/generic.c
@@ -65,10 +65,10 @@ static void i2c_generic_add_power_res(struct drivers_i2c_generic_config *config)
    acpigen_pop_len();		/* PowerResource PRIC */
 }

-void i2c_generic_fill_ssdt(struct device *dev,
-			   void (*callback)(struct device *dev))
+void i2c_generic_fill_ssdt(const struct i2c_generic_fill_options *opt)
 {
-	struct drivers_i2c_generic_config *config = dev->chip_info;
+	struct drivers_i2c_generic_config *config = opt->config;
+	struct device *dev = opt->dev;
    const char *scope = acpi_device_scope(dev);
    struct acpi_i2c i2c = {
    	.address = dev->path.i2c.device,
@@ -119,8 +119,8 @@ void i2c_generic_fill_ssdt(struct device *dev,
    i2c_generic_add_power_res(config);

/* Callback if any. */
-	if (callback)
-		callback(dev);
+	if (opt->callback)
+		opt->callback(dev);

acpigen_pop_len(); /* Device */
    acpigen_pop_len(); /* Scope */
@@ -131,7 +131,11 @@ void i2c_generic_fill_ssdt(struct device *dev,

static void i2c_generic_fill_ssdt_generator(struct device *dev)
 {
-	i2c_generic_fill_ssdt(dev, NULL);
+	const struct i2c_generic_fill_options opt = {
+		.dev = dev,
+		.config = dev->chip_info,
+	};
+	i2c_generic_fill_ssdt(&opt);
 }

/* Use name specified in config or build one from I2C address */
diff --git a/src/drivers/i2c/wacom/wacom.c b/src/drivers/i2c/wacom/wacom.c
index c54194f..5703244 100644
--- a/src/drivers/i2c/wacom/wacom.c
+++ b/src/drivers/i2c/wacom/wacom.c
@@ -30,7 +30,13 @@ static void i2c_wacom_fill_dsm(struct device *dev)

static void i2c_wacom_fill_ssdt_generator(struct device *dev)
 {
-	i2c_generic_fill_ssdt(dev, &i2c_wacom_fill_dsm);
+	struct drivers_i2c_wacom_config *config = dev->chip_info;
+	const struct i2c_generic_fill_options opt = {
+		.dev = dev,
+		.config = &config->generic,
+		.callback = i2c_wacom_fill_dsm,
+	};
+	i2c_generic_fill_ssdt(&opt);
 }

static const char *i2c_wacom_acpi_name(struct device *dev)