linux-kernel - [PATCH v7 3/3] platform/chrome: cros_ec

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Message-Id: <20221117114818.v7.3.Ie23c217d69ff25d7354db942613f143bbc8ef891@changeid>
Date:   Thu, 17 Nov 2022 11:48:48 -0700
From:   Mark Hasemeyer <markhas@...omium.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Raul Rangel <rrangel@...omium.org>,
        Mark Hasemeyer <markhas@...omium.org>,
        Bhanu Prakash Maiya <bhanumaiya@...omium.org>,
        Benson Leung <bleung@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>,
        Guenter Roeck <groeck@...omium.org>,
        chrome-platform@...ts.linux.dev
Subject: [PATCH v7 3/3] platform/chrome: cros_ec_uart: Add DT enumeration support

Existing firmware uses the "PRP0001" _HID and an associated compatible
string to enumerate the cros_ec_uart.

Add DT enumeration support for already shipped firmware.

Signed-off-by: Bhanu Prakash Maiya <bhanumaiya@...omium.org>
Signed-off-by: Mark Hasemeyer <markhas@...omium.org>
---

Changes in v7:
- Move PRP0001 enumeration support to its own commit

 drivers/platform/chrome/cros_ec_uart.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/platform/chrome/cros_ec_uart.c b/drivers/platform/chrome/cros_ec_uart.c
index b5f72f0104985..d44efb78bc881 100644
--- a/drivers/platform/chrome/cros_ec_uart.c
+++ b/drivers/platform/chrome/cros_ec_uart.c
@@ -11,6 +11,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/acpi.h>
+#include <linux/of.h>
 #include <linux/platform_data/cros_ec_commands.h>
 #include <linux/platform_data/cros_ec_proto.h>
 #include <linux/serdev.h>
@@ -392,6 +393,12 @@ static int __maybe_unused cros_ec_uart_resume(struct device *dev)
 static SIMPLE_DEV_PM_OPS(cros_ec_uart_pm_ops, cros_ec_uart_suspend,
 			 cros_ec_uart_resume);
 
+static const struct of_device_id cros_ec_uart_of_match[] = {
+	{ .compatible = "google,cros-ec-uart" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, cros_ec_uart_of_match);
+
 #ifdef CONFIG_ACPI
 static const struct acpi_device_id cros_ec_uart_acpi_id[] = {
 	{ "GOOG0019", 0 },
@@ -405,6 +412,7 @@ static struct serdev_device_driver cros_ec_uart_driver = {
 	.driver	= {
 		.name	= "cros-ec-uart",
 		.acpi_match_table = ACPI_PTR(cros_ec_uart_acpi_id),
+		.of_match_table = cros_ec_uart_of_match,
 		.pm	= &cros_ec_uart_pm_ops,
 	},
 	.probe		= cros_ec_uart_probe,
-- 
2.38.1.584.g0f3c55d4c2-goog