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Date: Fri, 22 May 2015 19:01:03 +0800
From: Hanjun Guo <hanjun.guo@...aro.org>
To: "Rafael J. Wysocki" <rjw@...ysocki.net>,
ACPI Devel Maling List <linux-acpi@...r.kernel.org>
CC: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Mika Westerberg <mika.westerberg@...ux.intel.com>,
Darren Hart <dvhart@...radead.org>
Subject: Re: [PATCH] ACPI / property: Define a symbol for PRP0001
On 2015年05月22日 10:24, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>
> Use a #defined symbol ACPI_DT_NAMESPACE_HID instead of the PRP0001
> string.
>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> ---
> drivers/acpi/internal.h | 2 ++
> drivers/acpi/property.c | 8 ++++----
> drivers/acpi/scan.c | 28 +++++++++++++++-------------
> 3 files changed, 21 insertions(+), 17 deletions(-)
>
> Index: linux-pm/drivers/acpi/internal.h
> ===================================================================
> --- linux-pm.orig/drivers/acpi/internal.h
> +++ linux-pm/drivers/acpi/internal.h
> @@ -191,6 +191,8 @@ bool acpi_osi_is_win8(void);
> /*--------------------------------------------------------------------------
> Device properties
> -------------------------------------------------------------------------- */
> +#define ACPI_DT_NAMESPACE_HID "PRP0001"
This makes PRP0001 easy understood,
Reviewed-by: Hanjun Guo <hanjun.guo@...aro.org>
Thanks
Hanjun
> +
> void acpi_init_properties(struct acpi_device *adev);
> void acpi_free_properties(struct acpi_device *adev);
>
> Index: linux-pm/drivers/acpi/scan.c
> ===================================================================
> --- linux-pm.orig/drivers/acpi/scan.c
> +++ linux-pm/drivers/acpi/scan.c
> @@ -135,12 +135,13 @@ static int create_pnp_modalias(struct ac
> struct acpi_hardware_id *id;
>
> /*
> - * Since we skip PRP0001 from the modalias below, 0 should be returned
> - * if PRP0001 is the only ACPI/PNP ID in the device's list.
> + * Since we skip ACPI_DT_NAMESPACE_HID from the modalias below, 0 should
> + * be returned if ACPI_DT_NAMESPACE_HID is the only ACPI/PNP ID in the
> + * device's list.
> */
> count = 0;
> list_for_each_entry(id, &acpi_dev->pnp.ids, list)
> - if (strcmp(id->id, "PRP0001"))
> + if (strcmp(id->id, ACPI_DT_NAMESPACE_HID))
> count++;
>
> if (!count)
> @@ -153,7 +154,7 @@ static int create_pnp_modalias(struct ac
> size -= len;
>
> list_for_each_entry(id, &acpi_dev->pnp.ids, list) {
> - if (!strcmp(id->id, "PRP0001"))
> + if (!strcmp(id->id, ACPI_DT_NAMESPACE_HID))
> continue;
>
> count = snprintf(&modalias[len], size, "%s:", id->id);
> @@ -177,7 +178,8 @@ static int create_pnp_modalias(struct ac
> * @size: Size of the buffer.
> *
> * Expose DT compatible modalias as of:NnameTCcompatible. This function should
> - * only be called for devices having PRP0001 in their list of ACPI/PNP IDs.
> + * only be called for devices having ACPI_DT_NAMESPACE_HID in their list of
> + * ACPI/PNP IDs.
> */
> static int create_of_modalias(struct acpi_device *acpi_dev, char *modalias,
> int size)
> @@ -980,9 +982,9 @@ static void acpi_device_remove_files(str
> * @adev: ACPI device object to match.
> * @of_match_table: List of device IDs to match against.
> *
> - * If @dev has an ACPI companion which has the special PRP0001 device ID in its
> - * list of identifiers and a _DSD object with the "compatible" property, use
> - * that property to match against the given list of identifiers.
> + * If @dev has an ACPI companion which has ACPI_DT_NAMESPACE_HID in its list of
> + * identifiers and a _DSD object with the "compatible" property, use that
> + * property to match against the given list of identifiers.
> */
> static bool acpi_of_match_device(struct acpi_device *adev,
> const struct of_device_id *of_match_table)
> @@ -1038,14 +1040,14 @@ static const struct acpi_device_id *__ac
> return id;
>
> /*
> - * Next, check the special "PRP0001" ID and try to match the
> + * Next, check ACPI_DT_NAMESPACE_HID and try to match the
> * "compatible" property if found.
> *
> * The id returned by the below is not valid, but the only
> * caller passing non-NULL of_ids here is only interested in
> * whether or not the return value is NULL.
> */
> - if (!strcmp("PRP0001", hwid->id)
> + if (!strcmp(ACPI_DT_NAMESPACE_HID, hwid->id)
> && acpi_of_match_device(device, of_ids))
> return id;
> }
> @@ -2391,7 +2393,7 @@ static void acpi_default_enumeration(str
> }
>
> static const struct acpi_device_id generic_device_ids[] = {
> - {"PRP0001", },
> + {ACPI_DT_NAMESPACE_HID, },
> {"", },
> };
>
> @@ -2399,8 +2401,8 @@ static int acpi_generic_device_attach(st
> const struct acpi_device_id *not_used)
> {
> /*
> - * Since PRP0001 is the only ID handled here, the test below can be
> - * unconditional.
> + * Since ACPI_DT_NAMESPACE_HID is the only ID handled here, the test
> + * below can be unconditional.
> */
> if (adev->data.of_compatible)
> acpi_default_enumeration(adev);
> Index: linux-pm/drivers/acpi/property.c
> ===================================================================
> --- linux-pm.orig/drivers/acpi/property.c
> +++ linux-pm/drivers/acpi/property.c
> @@ -110,11 +110,11 @@ void acpi_init_properties(struct acpi_de
> int i;
>
> /*
> - * Check if the special PRP0001 ACPI ID is present and in that case we
> - * fill in Device Tree compatible properties for this device.
> + * Check if ACPI_DT_NAMESPACE_HID is present and inthat case we fill in
> + * Device Tree compatible properties for this device.
> */
> list_for_each_entry(hwid, &adev->pnp.ids, list) {
> - if (!strcmp(hwid->id, "PRP0001")) {
> + if (!strcmp(hwid->id, ACPI_DT_NAMESPACE_HID)) {
> acpi_of = true;
> break;
> }
> @@ -170,7 +170,7 @@ void acpi_init_properties(struct acpi_de
> out:
> if (acpi_of && !adev->flags.of_compatible_ok)
> acpi_handle_info(adev->handle,
> - "PRP0001 requires 'compatible' property\n");
> + ACPI_DT_NAMESPACE_HID " requires 'compatible' property\n");
> }
>
> void acpi_free_properties(struct acpi_device *adev)
>
> --
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