leds: Add SN3218 and SN3216 support to the IS31FL32XX driver

Si-En Technology was acquired by ISSI in 2011, and it appears that
the IS31FL3218/IS31FL3216 are just rebranded SN3218/SN3216 devices.

Add the "si-en,sn3218" and "si-en,sn3216" compatible strings into the
IS31FL32XX driver as aliases for the issi equivalents, and update
binding documentation.

Datasheets:
    IS31FL3218: http://www.issi.com/WW/pdf/31FL3218.pdf
    SN3218:     http://www.si-en.com/uploadpdf/s2011517171720.pdf

    IS31FL3216: http://www.issi.com/WW/pdf/31FL3216.pdf
    SN3216:     http://www.si-en.com/uploadpdf/SN3216201152410148.pdf

Signed-off-by: David Rivshin <drivshin@allworx.com>
Acked-by: Rob Herring <robh@kernel.org>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>

2 files changed, 8 insertions, 4 deletions

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 08a5743fe7a5..1f6415168998 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -572,9 +572,9 @@ config LEDS_IS31FL32XX
         tristate "LED support for ISSI IS31FL32XX I2C LED controller family"
         depends on LEDS_CLASS && I2C && OF
         help
-          Say Y here to include support for ISSI IS31FL32XX LED controllers.
-          They are I2C devices with multiple constant-current channels, each
-          with independent 256-level PWM control.
+          Say Y here to include support for ISSI IS31FL32XX and Si-En SN32xx
+          LED controllers. They are I2C devices with multiple constant-current
+          channels, each with independent 256-level PWM control.
 
 comment "LED driver for blink(1) USB RGB LED is under Special HID drivers (HID_THINGM)"
 
diff --git a/drivers/leds/leds-is31fl32xx.c b/drivers/leds/leds-is31fl32xx.c
index 9a6785694886..c901d132d80c 100644
--- a/drivers/leds/leds-is31fl32xx.c
+++ b/drivers/leds/leds-is31fl32xx.c
@@ -8,7 +8,9 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  *
- * Datasheets: http://www.issi.com/US/product-analog-fxled-driver.shtml
+ * Datasheets:
+ *   http://www.issi.com/US/product-analog-fxled-driver.shtml
+ *   http://www.si-en.com/product.asp?parentid=890
  */
 
 #include <linux/device.h>
@@ -424,7 +426,9 @@ static const struct of_device_id of_is31fl31xx_match[] = {
         { .compatible = "issi,is31fl3236", .data = &is31fl3236_cdef, },
         { .compatible = "issi,is31fl3235", .data = &is31fl3235_cdef, },
         { .compatible = "issi,is31fl3218", .data = &is31fl3218_cdef, },
+        { .compatible = "si-en,sn3218",    .data = &is31fl3218_cdef, },
         { .compatible = "issi,is31fl3216", .data = &is31fl3216_cdef, },
+        { .compatible = "si-en,sn3216",    .data = &is31fl3216_cdef, },
         {},
 };