leds: pca955x: Add an IBM software implementation of the PCA9552 chip

IBM created an implementation of the PCA9552 on a PIC16F
microcontroller. The I2C device addresses are different from the
hardware PCA9552, so add a new compatible string and associated
platform data to be able to probe this device.
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>
Signed-off-by: Pavel Machek <pavel@ucw.cz>

drivers/leds/leds-pca955x.c

@@ -65,6 +65,7 @@ enum pca955x_type {
 	pca9550,
 	pca9551,
 	pca9552,
+	ibm_pca9552,
 	pca9553,
 };
 
@@ -90,6 +91,11 @@ static struct pca955x_chipdef pca955x_chipdefs[] = {
 		.slv_addr	= /* 1100xxx */ 0x60,
 		.slv_addr_shift	= 3,
 	},
+	[ibm_pca9552] = {
+		.bits		= 16,
+		.slv_addr	= /* 0110xxx */ 0x30,
+		.slv_addr_shift	= 3,
+	},
 	[pca9553] = {
 		.bits		= 4,
 		.slv_addr	= /* 110001x */ 0x62,
@@ -101,6 +107,7 @@ static const struct i2c_device_id pca955x_id[] = {
 	{ "pca9550", pca9550 },
 	{ "pca9551", pca9551 },
 	{ "pca9552", pca9552 },
+	{ "ibm-pca9552", ibm_pca9552 },
 	{ "pca9553", pca9553 },
 	{ }
 };
@@ -412,6 +419,7 @@ static const struct of_device_id of_pca955x_match[] = {
 	{ .compatible = "nxp,pca9550", .data = (void *)pca9550 },
 	{ .compatible = "nxp,pca9551", .data = (void *)pca9551 },
 	{ .compatible = "nxp,pca9552", .data = (void *)pca9552 },
+	{ .compatible = "ibm,pca9552", .data = (void *)ibm_pca9552 },
 	{ .compatible = "nxp,pca9553", .data = (void *)pca9553 },
 	{},
 };