linux-kernel - [PATCH V2] leds: pca963x: Add ACPI support

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Message-Id: <1480414910-16691-1-git-send-email-tnhuynh@apm.com>
Date:   Tue, 29 Nov 2016 17:21:50 +0700
From:   Tin Huynh <tnhuynh@....com>
To:     Mika Westerberg <mika.westerberg@...ux.intel.com>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Richard Purdie <rpurdie@...ys.net>,
        Jacek Anaszewski <j.anaszewski@...sung.com>
Cc:     linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-acpi@...r.kernel.org, Loc Ho <lho@....com>,
        Thang Nguyen <tqnguyen@....com>, Phong Vo <pvo@....com>,
        patches@....com, Tin Huynh <tnhuynh@....com>
Subject: [PATCH V2] leds: pca963x: Add ACPI support

This patch enables ACPI support for leds-pca963x driver.

Signed-off-by: Tin Huynh <tnhuynh@....com>
---
 drivers/leds/leds-pca963x.c |   25 ++++++++++++++++++++++++-
 1 files changed, 24 insertions(+), 1 deletions(-)

Change from V1:
  -Add CONFIG_ACPI.

diff --git a/drivers/leds/leds-pca963x.c b/drivers/leds/leds-pca963x.c
index 407eba1..57f11e3 100644
--- a/drivers/leds/leds-pca963x.c
+++ b/drivers/leds/leds-pca963x.c
@@ -25,6 +25,7 @@
  * or by adding the 'nxp,hw-blink' property to the DTS.
  */
 
+#include <linux/acpi.h>
 #include <linux/module.h>
 #include <linux/delay.h>
 #include <linux/string.h>
@@ -95,6 +96,17 @@ struct pca963x_chipdef {
 };
 MODULE_DEVICE_TABLE(i2c, pca963x_id);
 
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id pca963x_acpi_ids[] = {
+	{ "PCA9632", pca9633 },
+	{ "PCA9633", pca9633 },
+	{ "PCA9634", pca9634 },
+	{ "PCA9635", pca9635 },
+	{ }
+};
+MODULE_DEVICE_TABLE(acpi, pca963x_acpi_ids);
+#endif
+
 struct pca963x_led;
 
 struct pca963x {
@@ -322,7 +334,17 @@ static int pca963x_probe(struct i2c_client *client,
 	struct pca963x_chipdef *chip;
 	int i, err;
 
-	chip = &pca963x_chipdefs[id->driver_data];
+	if (id) {
+		chip = &pca963x_chipdefs[id->driver_data];
+	} else {
+		const struct acpi_device_id *acpi_id;
+
+		acpi_id = acpi_match_device(ACPI_PTR(pca963x_acpi_ids),
+						&client->dev);
+		if (!acpi_id)
+			return -ENODEV;
+		chip = &pca963x_chipdefs[acpi_id->driver_data];
+	}
 	pdata = dev_get_platdata(&client->dev);
 
 	if (!pdata) {
@@ -426,6 +448,7 @@ static int pca963x_remove(struct i2c_client *client)
 	.driver = {
 		.name	= "leds-pca963x",
 		.of_match_table = of_match_ptr(of_pca963x_match),
+		.acpi_match_table = ACPI_PTR(pca963x_acpi_ids),
 	},
 	.probe	= pca963x_probe,
 	.remove	= pca963x_remove,
-- 
1.7.1