From fd42f263cef9fd6bba9ded76a82d4ac66450e156 Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Tue, 22 Sep 2020 12:45:01 -0600
Subject: i2c: Add a generic driver to generate ACPI info

Many I2C devices produce roughly the same ACPI data with just things like
the GPIO/interrupt information being different.

This can be handled by a generic driver along with some information in the
device tree.

Add a generic i2c driver for this purpose.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heiko Schocher <hs@denx.de>
---
 drivers/i2c/i2c-uclass.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'drivers/i2c/i2c-uclass.c')

diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c
index 2373aa2ea4..5c4626b044 100644
--- a/drivers/i2c/i2c-uclass.c
+++ b/drivers/i2c/i2c-uclass.c
@@ -9,6 +9,8 @@
 #include <i2c.h>
 #include <log.h>
 #include <malloc.h>
+#include <acpi/acpi_device.h>
+#include <dm/acpi.h>
 #include <dm/device-internal.h>
 #include <dm/lists.h>
 #include <dm/pinctrl.h>
@@ -16,6 +18,7 @@
 #include <asm/gpio.h>
 #endif
 #include <linux/delay.h>
+#include "acpi_i2c.h"
 
 #define I2C_MAX_OFFSET_LEN	4
 
@@ -749,7 +752,21 @@ UCLASS_DRIVER(i2c_generic) = {
 	.name		= "i2c_generic",
 };
 
+static const struct udevice_id generic_chip_i2c_ids[] = {
+	{ .compatible = "i2c-chip", .data = I2C_DEVICE_GENERIC },
+#if CONFIG_IS_ENABLED(ACPIGEN)
+	{ .compatible = "hid-over-i2c", .data = I2C_DEVICE_HID_OVER_I2C },
+#endif
+	{ }
+};
+
 U_BOOT_DRIVER(i2c_generic_chip_drv) = {
 	.name		= "i2c_generic_chip_drv",
 	.id		= UCLASS_I2C_GENERIC,
+	.of_match	= generic_chip_i2c_ids,
+#if CONFIG_IS_ENABLED(ACPIGEN)
+	.ofdata_to_platdata	= acpi_i2c_ofdata_to_platdata,
+	.priv_auto_alloc_size	= sizeof(struct acpi_i2c_priv),
+#endif
+	ACPI_OPS_PTR(&acpi_i2c_ops)
 };
-- 
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