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Message-ID: <CAHp75VfMyyPEPg8VkmrbF6CeL0_+pPw+KrT5e+aGLsx0rwm=5g@mail.gmail.com>
Date: Sun, 17 Mar 2019 22:36:03 +0200
From: Andy Shevchenko <andy.shevchenko@...il.com>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc: Hans de Goede <hdegoede@...hat.com>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
USB <linux-usb@...r.kernel.org>,
Platform Driver <platform-driver-x86@...r.kernel.org>
Subject: Re: [PATCH 07/12] platform/x86: intel_cht_int33fe: Provide software
node for all components
On Fri, Mar 15, 2019 at 6:58 PM Heikki Krogerus
<heikki.krogerus@...ux.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.
>
I don't see any problems with code (*), though I hope Hans will have
chance to test this.
One nit below.
(*) Means all patches touching PDx86 in this series
> Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> ---
> drivers/platform/x86/intel_cht_int33fe.c | 122 +++++++++++++++++------
> 1 file changed, 92 insertions(+), 30 deletions(-)
>
> diff --git a/drivers/platform/x86/intel_cht_int33fe.c b/drivers/platform/x86/intel_cht_int33fe.c
> index 6fa3cced6f8e..26444d31945b 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>
Preserve the ordering, please.
>
> #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] = NULL,
> + [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";
> @@ -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;
> }
> --
> 2.20.1
>
--
With Best Regards,
Andy Shevchenko
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