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Message-ID: <7e3b0ed4-c646-c58b-7afc-035b274716e4@collabora.com>
Date: Tue, 30 Mar 2021 18:33:09 +0200
From: Enric Balletbo i Serra <enric.balletbo@...labora.com>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
Wolfram Sang <wsa@...nel.org>
Cc: linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
Benson Leung <bleung@...omium.org>
Subject: Re: [PATCH 10/12] platform/chrome: chromeos_laptop - Prepare complete
software nodes
Hi Heikki,
Thank you for your patch.
On 29/3/21 12:50, Heikki Krogerus wrote:
> The older device property API is going to be removed soon
> and that will affect also I2C subystem. Supplying complete
> software nodes instead of only the properties in them for
> the I2C devices.
>
> Signed-off-by: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
> Cc: Benson Leung <bleung@...omium.org>
> Cc: Enric Balletbo i Serra <enric.balletbo@...labora.com>
Acked-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
> ---
> drivers/platform/chrome/chromeos_laptop.c | 100 +++++++++++++---------
> 1 file changed, 60 insertions(+), 40 deletions(-)
>
> diff --git a/drivers/platform/chrome/chromeos_laptop.c b/drivers/platform/chrome/chromeos_laptop.c
> index 472a03daa8693..4e14b4d6635d7 100644
> --- a/drivers/platform/chrome/chromeos_laptop.c
> +++ b/drivers/platform/chrome/chromeos_laptop.c
> @@ -52,12 +52,15 @@ struct i2c_peripheral {
> enum i2c_adapter_type type;
> u32 pci_devid;
>
> + const struct property_entry *properties;
> +
> struct i2c_client *client;
> };
>
> struct acpi_peripheral {
> char hid[ACPI_ID_LEN];
> - const struct property_entry *properties;
> + struct software_node swnode;
> + struct i2c_client *client;
> };
>
> struct chromeos_laptop {
> @@ -68,7 +71,7 @@ struct chromeos_laptop {
> struct i2c_peripheral *i2c_peripherals;
> unsigned int num_i2c_peripherals;
>
> - const struct acpi_peripheral *acpi_peripherals;
> + struct acpi_peripheral *acpi_peripherals;
> unsigned int num_acpi_peripherals;
> };
>
> @@ -161,7 +164,7 @@ static void chromeos_laptop_check_adapter(struct i2c_adapter *adapter)
>
> static bool chromeos_laptop_adjust_client(struct i2c_client *client)
> {
> - const struct acpi_peripheral *acpi_dev;
> + struct acpi_peripheral *acpi_dev;
> struct acpi_device_id acpi_ids[2] = { };
> int i;
> int error;
> @@ -175,8 +178,7 @@ static bool chromeos_laptop_adjust_client(struct i2c_client *client)
> memcpy(acpi_ids[0].id, acpi_dev->hid, ACPI_ID_LEN);
>
> if (acpi_match_device(acpi_ids, &client->dev)) {
> - error = device_add_properties(&client->dev,
> - acpi_dev->properties);
> + error = device_add_software_node(&client->dev, &acpi_dev->swnode);
> if (error) {
> dev_err(&client->dev,
> "failed to add properties: %d\n",
> @@ -184,6 +186,8 @@ static bool chromeos_laptop_adjust_client(struct i2c_client *client)
> break;
> }
>
> + acpi_dev->client = client;
> +
> return true;
> }
> }
> @@ -193,15 +197,28 @@ static bool chromeos_laptop_adjust_client(struct i2c_client *client)
>
> static void chromeos_laptop_detach_i2c_client(struct i2c_client *client)
> {
> + struct acpi_peripheral *acpi_dev;
> struct i2c_peripheral *i2c_dev;
> int i;
>
> - for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) {
> - i2c_dev = &cros_laptop->i2c_peripherals[i];
> + if (has_acpi_companion(&client->dev))
> + for (i = 0; i < cros_laptop->num_acpi_peripherals; i++) {
> + acpi_dev = &cros_laptop->acpi_peripherals[i];
>
> - if (i2c_dev->client == client)
> - i2c_dev->client = NULL;
> - }
> + if (acpi_dev->client == client) {
> + acpi_dev->client = NULL;
> + return;
> + }
> + }
> + else
> + for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) {
> + i2c_dev = &cros_laptop->i2c_peripherals[i];
> +
> + if (i2c_dev->client == client) {
> + i2c_dev->client = NULL;
> + return;
> + }
> + }
> }
>
> static int chromeos_laptop_i2c_notifier_call(struct notifier_block *nb,
> @@ -302,28 +319,26 @@ static struct i2c_peripheral chromebook_pixel_peripherals[] __initdata = {
> .board_info = {
> I2C_BOARD_INFO("atmel_mxt_ts",
> ATMEL_TS_I2C_ADDR),
> - .properties =
> - chromebook_atmel_touchscreen_props,
> .flags = I2C_CLIENT_WAKE,
> },
> .dmi_name = "touchscreen",
> .irqflags = IRQF_TRIGGER_FALLING,
> .type = I2C_ADAPTER_PANEL,
> .alt_addr = ATMEL_TS_I2C_BL_ADDR,
> + .properties = chromebook_atmel_touchscreen_props,
> },
> /* Touchpad. */
> {
> .board_info = {
> I2C_BOARD_INFO("atmel_mxt_tp",
> ATMEL_TP_I2C_ADDR),
> - .properties =
> - chromebook_pixel_trackpad_props,
> .flags = I2C_CLIENT_WAKE,
> },
> .dmi_name = "trackpad",
> .irqflags = IRQF_TRIGGER_FALLING,
> .type = I2C_ADAPTER_VGADDC,
> .alt_addr = ATMEL_TP_I2C_BL_ADDR,
> + .properties = chromebook_pixel_trackpad_props,
> },
> /* Light Sensor. */
> {
> @@ -414,8 +429,6 @@ static struct i2c_peripheral acer_c720_peripherals[] __initdata = {
> .board_info = {
> I2C_BOARD_INFO("atmel_mxt_ts",
> ATMEL_TS_I2C_ADDR),
> - .properties =
> - chromebook_atmel_touchscreen_props,
> .flags = I2C_CLIENT_WAKE,
> },
> .dmi_name = "touchscreen",
> @@ -423,6 +436,7 @@ static struct i2c_peripheral acer_c720_peripherals[] __initdata = {
> .type = I2C_ADAPTER_DESIGNWARE,
> .pci_devid = PCI_DEVID(0, PCI_DEVFN(0x15, 0x2)),
> .alt_addr = ATMEL_TS_I2C_BL_ADDR,
> + .properties = chromebook_atmel_touchscreen_props,
> },
> /* Touchpad. */
> {
> @@ -498,12 +512,16 @@ static struct acpi_peripheral samus_peripherals[] __initdata = {
> /* Touchpad */
> {
> .hid = "ATML0000",
> - .properties = samus_trackpad_props,
> + .swnode = {
> + .properties = samus_trackpad_props,
> + },
> },
> /* Touchsceen */
> {
> .hid = "ATML0001",
> - .properties = chromebook_atmel_touchscreen_props,
> + .swnode = {
> + .properties = chromebook_atmel_touchscreen_props,
> + },
> },
> };
> DECLARE_ACPI_CROS_LAPTOP(samus);
> @@ -512,12 +530,16 @@ static struct acpi_peripheral generic_atmel_peripherals[] __initdata = {
> /* Touchpad */
> {
> .hid = "ATML0000",
> - .properties = chromebook_pixel_trackpad_props,
> + .swnode = {
> + .properties = chromebook_pixel_trackpad_props,
> + },
> },
> /* Touchsceen */
> {
> .hid = "ATML0001",
> - .properties = chromebook_atmel_touchscreen_props,
> + .swnode = {
> + .properties = chromebook_atmel_touchscreen_props,
> + },
> },
> };
> DECLARE_ACPI_CROS_LAPTOP(generic_atmel);
> @@ -743,12 +765,11 @@ chromeos_laptop_prepare_i2c_peripherals(struct chromeos_laptop *cros_laptop,
> if (error)
> goto err_out;
>
> - /* We need to deep-copy properties */
> - if (info->properties) {
> - info->properties =
> - property_entries_dup(info->properties);
> - if (IS_ERR(info->properties)) {
> - error = PTR_ERR(info->properties);
> + /* Create primary fwnode for the device - copies everything */
> + if (i2c_dev->properties) {
> + info->fwnode = fwnode_create_software_node(i2c_dev->properties, NULL);
> + if (IS_ERR(info->fwnode)) {
> + error = PTR_ERR(info->fwnode);
> goto err_out;
> }
> }
> @@ -760,8 +781,8 @@ chromeos_laptop_prepare_i2c_peripherals(struct chromeos_laptop *cros_laptop,
> while (--i >= 0) {
> i2c_dev = &cros_laptop->i2c_peripherals[i];
> info = &i2c_dev->board_info;
> - if (info->properties)
> - property_entries_free(info->properties);
> + if (!IS_ERR_OR_NULL(info->fwnode))
> + fwnode_remove_software_node(info->fwnode);
> }
> kfree(cros_laptop->i2c_peripherals);
> return error;
> @@ -801,11 +822,11 @@ chromeos_laptop_prepare_acpi_peripherals(struct chromeos_laptop *cros_laptop,
> *acpi_dev = *src_dev;
>
> /* We need to deep-copy properties */
> - if (src_dev->properties) {
> - acpi_dev->properties =
> - property_entries_dup(src_dev->properties);
> - if (IS_ERR(acpi_dev->properties)) {
> - error = PTR_ERR(acpi_dev->properties);
> + if (src_dev->swnode.properties) {
> + acpi_dev->swnode.properties =
> + property_entries_dup(src_dev->swnode.properties);
> + if (IS_ERR(acpi_dev->swnode.properties)) {
> + error = PTR_ERR(acpi_dev->swnode.properties);
> goto err_out;
> }
> }
> @@ -821,8 +842,8 @@ chromeos_laptop_prepare_acpi_peripherals(struct chromeos_laptop *cros_laptop,
> err_out:
> while (--i >= 0) {
> acpi_dev = &acpi_peripherals[i];
> - if (acpi_dev->properties)
> - property_entries_free(acpi_dev->properties);
> + if (!IS_ERR_OR_NULL(acpi_dev->swnode.properties))
> + property_entries_free(acpi_dev->swnode.properties);
> }
>
> kfree(acpi_peripherals);
> @@ -833,21 +854,20 @@ static void chromeos_laptop_destroy(const struct chromeos_laptop *cros_laptop)
> {
> const struct acpi_peripheral *acpi_dev;
> struct i2c_peripheral *i2c_dev;
> - struct i2c_board_info *info;
> int i;
>
> for (i = 0; i < cros_laptop->num_i2c_peripherals; i++) {
> i2c_dev = &cros_laptop->i2c_peripherals[i];
> - info = &i2c_dev->board_info;
> -
> i2c_unregister_device(i2c_dev->client);
> - property_entries_free(info->properties);
> }
>
> for (i = 0; i < cros_laptop->num_acpi_peripherals; i++) {
> acpi_dev = &cros_laptop->acpi_peripherals[i];
>
> - property_entries_free(acpi_dev->properties);
> + if (acpi_dev->client)
> + device_remove_software_node(&acpi_dev->client->dev);
> +
> + property_entries_free(acpi_dev->swnode.properties);
> }
>
> kfree(cros_laptop->i2c_peripherals);
>
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