diff mbox series

[08/11] platform/x86: intel_cht_int33fe: Provide software nodes for the devices

Message ID 20190403164537.24643-9-heikki.krogerus@linux.intel.com (mailing list archive)
State Deferred, archived
Headers show
Series Software fwnode references | expand

Commit Message

Heikki Krogerus April 3, 2019, 4:45 p.m. UTC 
Software nodes provide two features that we will need later.
1) Software nodes can have references to other software nodes.
2) Software nodes can exist before a device entry is created.

Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
---
 drivers/platform/x86/intel_cht_int33fe.c | 122 +++++++++++++++++------
 1 file changed, 92 insertions(+), 30 deletions(-)

Comments

Andy Shevchenko April 8, 2019, 4:09 p.m. UTC | #1 
On Wed, Apr 3, 2019 at 7:46 PM Heikki Krogerus
<heikki.krogerus@linux.intel.com> wrote:
>
> Software nodes provide two features that we will need later.
> 1) Software nodes can have references to other software nodes.
> 2) Software nodes can exist before a device entry is created.

>  #include <linux/platform_device.h>
>  #include <linux/regulator/consumer.h>
>  #include <linux/slab.h>
> +#include <linux/pci.h>

I understand your attitude to ordering here, but we already have it
ordered, why not to keep it that way?

> -static struct i2c_client *cht_int33fe_find_max17047(void)
> -{
> -       struct i2c_client *max17047 = NULL;
> -
> -       i2c_for_each_dev(&max17047, cht_int33fe_check_for_max17047);
> -       return max17047;
> -}

This sounds like a cleanup patch before actual change.
And I'm not sure, do we need to remove this function?

> +static int
> +cht_int33fe_max17047(struct device *dev, struct cht_int33fe_data *data)
> +{
> +       struct fwnode_handle *fwnode = data->node[INT33FE_NODE_MAX17047];
> +       struct i2c_client *max17047 = NULL;
> +       struct i2c_board_info board_info;
> +       int ret;
> +
> +       i2c_for_each_dev(&max17047, cht_int33fe_check_for_max17047);
> +       if (max17047) {
> +               /* Pre-existing i2c-client for the max17047, add device-props */
> +               max17047->dev.fwnode->secondary = fwnode;
> +               /* And re-probe to get the new device-props applied. */
> +               ret = device_reprobe(&max17047->dev);
> +               if (ret)
> +                       dev_warn(dev, "Reprobing max17047 error: %d\n", ret);
> +               return 0;
> +       }
> +
> +       memset(&board_info, 0, sizeof(board_info));
> +       strlcpy(board_info.type, "max17047", I2C_NAME_SIZE);
> +       board_info.dev_name = "max17047";
> +       board_info.fwnode = fwnode;
> +       data->max17047 = i2c_acpi_new_device(dev, 1, &board_info);
> +       if (IS_ERR(data->max17047))
> +               return PTR_ERR(data->max17047);
> +
> +       return 0;
> +}

This looks like a split from the original code with some changes.
Perhaps, split patch first.

>         /* Work around BIOS bug, see comment on cht_int33fe_find_max17047 */

After this patch, the comment here become outdated, care to fix?

> +       ret = cht_int33fe_max17047(dev, data);

Seems like the verb is missed in the name of the function.

> +       if (ret)
> +               goto out_remove_nodes;
Heikki Krogerus April 9, 2019, 12:41 p.m. UTC | #2 
On Mon, Apr 08, 2019 at 07:09:15PM +0300, Andy Shevchenko wrote:
> On Wed, Apr 3, 2019 at 7:46 PM Heikki Krogerus
> <heikki.krogerus@linux.intel.com> wrote:
> >
> > Software nodes provide two features that we will need later.
> > 1) Software nodes can have references to other software nodes.
> > 2) Software nodes can exist before a device entry is created.
> 
> >  #include <linux/platform_device.h>
> >  #include <linux/regulator/consumer.h>
> >  #include <linux/slab.h>
> > +#include <linux/pci.h>
> 
> I understand your attitude to ordering here, but we already have it
> ordered, why not to keep it that way?

Sure. I'll keep the order.

> > -static struct i2c_client *cht_int33fe_find_max17047(void)
> > -{
> > -       struct i2c_client *max17047 = NULL;
> > -
> > -       i2c_for_each_dev(&max17047, cht_int33fe_check_for_max17047);
> > -       return max17047;
> > -}
> 
> This sounds like a cleanup patch before actual change.
> And I'm not sure, do we need to remove this function?
> 
> > +static int
> > +cht_int33fe_max17047(struct device *dev, struct cht_int33fe_data *data)
> > +{
> > +       struct fwnode_handle *fwnode = data->node[INT33FE_NODE_MAX17047];
> > +       struct i2c_client *max17047 = NULL;
> > +       struct i2c_board_info board_info;
> > +       int ret;
> > +
> > +       i2c_for_each_dev(&max17047, cht_int33fe_check_for_max17047);
> > +       if (max17047) {
> > +               /* Pre-existing i2c-client for the max17047, add device-props */
> > +               max17047->dev.fwnode->secondary = fwnode;
> > +               /* And re-probe to get the new device-props applied. */
> > +               ret = device_reprobe(&max17047->dev);
> > +               if (ret)
> > +                       dev_warn(dev, "Reprobing max17047 error: %d\n", ret);
> > +               return 0;
> > +       }
> > +
> > +       memset(&board_info, 0, sizeof(board_info));
> > +       strlcpy(board_info.type, "max17047", I2C_NAME_SIZE);
> > +       board_info.dev_name = "max17047";
> > +       board_info.fwnode = fwnode;
> > +       data->max17047 = i2c_acpi_new_device(dev, 1, &board_info);
> > +       if (IS_ERR(data->max17047))
> > +               return PTR_ERR(data->max17047);
> > +
> > +       return 0;
> > +}
> 
> This looks like a split from the original code with some changes.
> Perhaps, split patch first.
> 
> >         /* Work around BIOS bug, see comment on cht_int33fe_find_max17047 */
> 
> After this patch, the comment here become outdated, care to fix?
> 
> > +       ret = cht_int33fe_max17047(dev, data);
> 
> Seems like the verb is missed in the name of the function.

Yeah, I never meant to rename the function. I'll just keep the
function name as cht_int33fe_find_max17047.


thanks,
diff mbox series

Patch

diff --git a/drivers/platform/x86/intel_cht_int33fe.c b/drivers/platform/x86/intel_cht_int33fe.c
index 657b8d61554c..2f12ce154489 100644
--- a/drivers/platform/x86/intel_cht_int33fe.c
+++ b/drivers/platform/x86/intel_cht_int33fe.c
@@ -24,15 +24,25 @@ 
 #include <linux/platform_device.h>
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>
+#include <linux/pci.h>
 
 #define EXPECTED_PTYPE		4
 
+enum {
+	INT33FE_NODE_FUSB302,
+	INT33FE_NODE_MAX17047,
+	INT33FE_NODE_PI3USB30532,
+	INT33FE_NODE_MAX,
+};
+
 struct cht_int33fe_data {
 	struct i2c_client *max17047;
 	struct i2c_client *fusb302;
 	struct i2c_client *pi3usb30532;
 	/* Contain a list-head must be per device */
 	struct device_connection connections[4];
+
+	struct fwnode_handle *node[INT33FE_NODE_MAX];
 };
 
 /*
@@ -63,14 +73,6 @@  static int cht_int33fe_check_for_max17047(struct device *dev, void *data)
 	return 1;
 }
 
-static struct i2c_client *cht_int33fe_find_max17047(void)
-{
-	struct i2c_client *max17047 = NULL;
-
-	i2c_for_each_dev(&max17047, cht_int33fe_check_for_max17047);
-	return max17047;
-}
-
 static const char * const max17047_suppliers[] = { "bq24190-charger" };
 
 static const struct property_entry max17047_props[] = {
@@ -78,6 +80,36 @@  static const struct property_entry max17047_props[] = {
 	{ }
 };
 
+static int
+cht_int33fe_max17047(struct device *dev, struct cht_int33fe_data *data)
+{
+	struct fwnode_handle *fwnode = data->node[INT33FE_NODE_MAX17047];
+	struct i2c_client *max17047 = NULL;
+	struct i2c_board_info board_info;
+	int ret;
+
+	i2c_for_each_dev(&max17047, cht_int33fe_check_for_max17047);
+	if (max17047) {
+		/* Pre-existing i2c-client for the max17047, add device-props */
+		max17047->dev.fwnode->secondary = fwnode;
+		/* And re-probe to get the new device-props applied. */
+		ret = device_reprobe(&max17047->dev);
+		if (ret)
+			dev_warn(dev, "Reprobing max17047 error: %d\n", ret);
+		return 0;
+	}
+
+	memset(&board_info, 0, sizeof(board_info));
+	strlcpy(board_info.type, "max17047", I2C_NAME_SIZE);
+	board_info.dev_name = "max17047";
+	board_info.fwnode = fwnode;
+	data->max17047 = i2c_acpi_new_device(dev, 1, &board_info);
+	if (IS_ERR(data->max17047))
+		return PTR_ERR(data->max17047);
+
+	return 0;
+}
+
 static const struct property_entry fusb302_props[] = {
 	PROPERTY_ENTRY_STRING("linux,extcon-name", "cht_wcove_pwrsrc"),
 	PROPERTY_ENTRY_U32("fcs,max-sink-microvolt", 12000000),
@@ -86,12 +118,50 @@  static const struct property_entry fusb302_props[] = {
 	{ }
 };
 
+static const struct property_entry *props[] = {
+	[INT33FE_NODE_FUSB302]		= fusb302_props,
+	[INT33FE_NODE_MAX17047]		= max17047_props,
+	[INT33FE_NODE_PI3USB30532]	= NULL,
+};
+
+static void cht_int33fe_remove_nodes(struct cht_int33fe_data *data)
+{
+	int i;
+
+	for (i = 0; i < INT33FE_NODE_MAX; i++) {
+		fwnode_remove_software_node(data->node[i]);
+		data->node[i] = NULL;
+	}
+}
+
+static int cht_int33fe_add_nodes(struct cht_int33fe_data *data)
+{
+	struct fwnode_handle *fwnode;
+	int ret;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(props); i++) {
+		fwnode = fwnode_create_software_node(props[i], NULL);
+		if (IS_ERR(fwnode)) {
+			ret = PTR_ERR(fwnode);
+			goto err_remove_nodes;
+		}
+		data->node[i] = fwnode;
+	}
+
+	return 0;
+
+err_remove_nodes:
+	cht_int33fe_remove_nodes(data);
+
+	return ret;
+}
+
 static int cht_int33fe_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct i2c_board_info board_info;
 	struct cht_int33fe_data *data;
-	struct i2c_client *max17047;
 	struct regulator *regulator;
 	unsigned long long ptyp;
 	acpi_status status;
@@ -151,26 +221,14 @@  static int cht_int33fe_probe(struct platform_device *pdev)
 	if (!data)
 		return -ENOMEM;
 
+	ret = cht_int33fe_add_nodes(data);
+	if (ret)
+		return ret;
+
 	/* Work around BIOS bug, see comment on cht_int33fe_find_max17047 */
-	max17047 = cht_int33fe_find_max17047();
-	if (max17047) {
-		/* Pre-existing i2c-client for the max17047, add device-props */
-		ret = device_add_properties(&max17047->dev, max17047_props);
-		if (ret)
-			return ret;
-		/* And re-probe to get the new device-props applied. */
-		ret = device_reprobe(&max17047->dev);
-		if (ret)
-			dev_warn(dev, "Reprobing max17047 error: %d\n", ret);
-	} else {
-		memset(&board_info, 0, sizeof(board_info));
-		strlcpy(board_info.type, "max17047", I2C_NAME_SIZE);
-		board_info.dev_name = "max17047";
-		board_info.properties = max17047_props;
-		data->max17047 = i2c_acpi_new_device(dev, 1, &board_info);
-		if (IS_ERR(data->max17047))
-			return PTR_ERR(data->max17047);
-	}
+	ret = cht_int33fe_max17047(dev, data);
+	if (ret)
+		goto out_remove_nodes;
 
 	data->connections[0].endpoint[0] = "port0";
 	data->connections[0].endpoint[1] = "i2c-pi3usb30532-switch";
@@ -187,7 +245,7 @@  static int cht_int33fe_probe(struct platform_device *pdev)
 	memset(&board_info, 0, sizeof(board_info));
 	strlcpy(board_info.type, "typec_fusb302", I2C_NAME_SIZE);
 	board_info.dev_name = "fusb302";
-	board_info.properties = fusb302_props;
+	board_info.fwnode = data->node[INT33FE_NODE_FUSB302];
 	board_info.irq = fusb302_irq;
 
 	data->fusb302 = i2c_acpi_new_device(dev, 2, &board_info);
@@ -198,6 +256,7 @@  static int cht_int33fe_probe(struct platform_device *pdev)
 
 	memset(&board_info, 0, sizeof(board_info));
 	board_info.dev_name = "pi3usb30532";
+	board_info.fwnode = data->node[INT33FE_NODE_PI3USB30532];
 	strlcpy(board_info.type, "pi3usb30532", I2C_NAME_SIZE);
 
 	data->pi3usb30532 = i2c_acpi_new_device(dev, 3, &board_info);
@@ -214,9 +273,11 @@  static int cht_int33fe_probe(struct platform_device *pdev)
 	i2c_unregister_device(data->fusb302);
 
 out_unregister_max17047:
+	device_connections_remove(data->connections);
 	i2c_unregister_device(data->max17047);
 
-	device_connections_remove(data->connections);
+out_remove_nodes:
+	cht_int33fe_remove_nodes(data);
 
 	return ret;
 }
@@ -230,6 +291,7 @@  static int cht_int33fe_remove(struct platform_device *pdev)
 	i2c_unregister_device(data->max17047);
 
 	device_connections_remove(data->connections);
+	cht_int33fe_remove_nodes(data);
 
 	return 0;
 }