From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Thu, 23 Mar 2017 19:17:48 +0000 (+0200)
Subject: leds: lp3952: Remove ACPI support for lp3952
X-Git-Tag: v4.12-rc1~168^2~4
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=96962178475ae8040f40dff3a44beb9f69181421;p=karo-tx-linux.git

leds: lp3952: Remove ACPI support for lp3952

In ACPI world any ID should be carefully chosen and registered
officially. The discussion [1] as I read it gets to wilful assignment
an ID for non-existing real DSDT example.

Rafael already told [2] how this device would be enumerated using
compatible string. To be more precise look at the possible DSDT excerpt
below:

	Device (LDX0) {
		Name (_HID, "PRP0001")
		Name (_DDN, "TI LP3952 compatible led driver")
		...
	})

	Name (_DSD, Package () {
		ToUUID("daffd814-6eba-4d8c-8a91-bc9bbf4aa301"),
		Package () {
			Package () {"compatible", "ti,lp3952"},
			...
		}
	})

Based on above, remove non-official ACPI IDs and enumeration from the
driver.

Note: currently driver has no compatible strings at all, to make above
working one should add at least one.

[1] https://e2e.ti.com/support/power_management/led_driver/f/192/t/524926
[2] https://www.spinics.net/lists/linux-acpi/msg67125.html

Cc: Tony Makkiel <tony.makkiel@daqri.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
---

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index e9ba04dcb7cf..8075d2ebccff 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -249,7 +249,6 @@ config LEDS_LP3952
 	tristate "LED Support for TI LP3952 2 channel LED driver"
 	depends on LEDS_CLASS
 	depends on I2C
-	depends on ACPI
 	depends on GPIOLIB
 	select REGMAP_I2C
 	help
diff --git a/drivers/leds/leds-lp3952.c b/drivers/leds/leds-lp3952.c
index 4847e89883a7..5184436b8905 100644
--- a/drivers/leds/leds-lp3952.c
+++ b/drivers/leds/leds-lp3952.c
@@ -10,7 +10,6 @@
  *
  */
 
-#include <linux/acpi.h>
 #include <linux/delay.h>
 #include <linux/gpio.h>
 #include <linux/i2c.h>
@@ -276,19 +275,9 @@ static const struct i2c_device_id lp3952_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, lp3952_id);
 
-#ifdef CONFIG_ACPI
-static const struct acpi_device_id lp3952_acpi_match[] = {
-	{"TXNW3952", 0},
-	{}
-};
-
-MODULE_DEVICE_TABLE(acpi, lp3952_acpi_match);
-#endif
-
 static struct i2c_driver lp3952_i2c_driver = {
 	.driver = {
 			.name = LP3952_NAME,
-			.acpi_match_table = ACPI_PTR(lp3952_acpi_match),
 	},
 	.probe = lp3952_probe,
 	.remove = lp3952_remove,