linux-kernel - [PATCH 2/2] leds: pca955x: Add an IBM software implementation of the PCA9552 chip

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Message-Id: <20200709201220.13736-3-eajames@linux.ibm.com>
Date:   Thu,  9 Jul 2020 15:12:20 -0500
From:   Eddie James <eajames@...ux.ibm.com>
To:     linux-leds@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        robh+dt@...nel.org, dmurphy@...com, pavel@....cz,
        jacek.anaszewski@...il.com, eajames@...ux.ibm.com,
        vishwa@...ux.ibm.com
Subject: [PATCH 2/2] 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@...ux.ibm.com>
Reviewed-by: Vishwanatha Subbanna <vishwa@...ux.vnet.ibm.com>
---
 drivers/leds/leds-pca955x.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
index 4037c504589c..bf7ead45f66b 100644
--- a/drivers/leds/leds-pca955x.c
+++ b/drivers/leds/leds-pca955x.c
@@ -65,6 +65,7 @@ enum pca955x_type {
 	pca9550,
 	pca9551,
 	pca9552,
+	pca9552_ibm,
 	pca9553,
 };
 
@@ -90,6 +91,11 @@ static struct pca955x_chipdef pca955x_chipdefs[] = {
 		.slv_addr	= /* 1100xxx */ 0x60,
 		.slv_addr_shift	= 3,
 	},
+	[pca9552_ibm] = {
+		.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 },
+	{ "pca9552-ibm", pca9552_ibm },
 	{ "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 = "nxp,pca9552-ibm", .data = (void *)pca9552_ibm },
 	{ .compatible = "nxp,pca9553", .data = (void *)pca9553 },
 	{},
 };
-- 
2.24.0