Edward O'Callaghan has uploaded this change for review.
drivers/i2c: Add rtd2142 stub driver
Currently this driver is a nop however forms the boilerplate for the
required support.
BUG=b:142769041
BRANCH=none
TEST=builds
Change-Id: I1716e6f186a097b309504762017b98747972547c
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
---
A src/drivers/i2c/rtd2142/Kconfig
A src/drivers/i2c/rtd2142/Makefile.inc
A src/drivers/i2c/rtd2142/chip.h
A src/drivers/i2c/rtd2142/rtd2142.c
4 files changed, 75 insertions(+), 0 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/04/37904/1
diff --git a/src/drivers/i2c/rtd2142/Kconfig b/src/drivers/i2c/rtd2142/Kconfig
new file mode 100644
index 0000000..614df35
--- /dev/null
+++ b/src/drivers/i2c/rtd2142/Kconfig
@@ -0,0 +1,5 @@
+config DRIVERS_I2C_RTD2142
+ bool
+ default n
+ help
+ Enable support for Realtek RTD2142 DisplayPort MST bridge chip.
diff --git a/src/drivers/i2c/rtd2142/Makefile.inc b/src/drivers/i2c/rtd2142/Makefile.inc
new file mode 100644
index 0000000..df9edae
--- /dev/null
+++ b/src/drivers/i2c/rtd2142/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_DRIVERS_I2C_RTD2142) += rtd2142.c
diff --git a/src/drivers/i2c/rtd2142/chip.h b/src/drivers/i2c/rtd2142/chip.h
new file mode 100644
index 0000000..182b1b7
--- /dev/null
+++ b/src/drivers/i2c/rtd2142/chip.h
@@ -0,0 +1,15 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+struct drivers_i2c_rtd2142_config {
+};
diff --git a/src/drivers/i2c/rtd2142/rtd2142.c b/src/drivers/i2c/rtd2142/rtd2142.c
new file mode 100644
index 0000000..580a6b8
--- /dev/null
+++ b/src/drivers/i2c/rtd2142/rtd2142.c
@@ -0,0 +1,54 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <console/console.h>
+#include <device/device.h>
+#include <device/smbus.h>
+#include <device/pci.h>
+
+#include "chip.h"
+
+static void rtd2142_setup(struct device *dev)
+{
+ struct drivers_i2c_rtd2142_config *config = dev->chip_info;
+
+ if (!config)
+ return;
+
+ /* nop */
+}
+
+static void rtd2142_init(struct device *dev)
+{
+ if (dev->enabled && dev->path.type == DEVICE_PATH_I2C &&
+ ops_smbus_bus(get_pbus_smbus(dev))) {
+ rtd2142_setup(dev);
+ }
+}
+
+static struct device_operations rtd2142_operations = {
+ .read_resources = DEVICE_NOOP,
+ .set_resources = DEVICE_NOOP,
+ .enable_resources = DEVICE_NOOP,
+ .init = rtd2142_init,
+};
+
+static void enable_dev(struct device *dev)
+{
+ dev->ops = &rtd2142_operations;
+}
+
+struct chip_operations drivers_i2c_rtd2142_ops = {
+ CHIP_NAME("Realtek RTD2142 MST")
+ .enable_dev = enable_dev,
+};
To view, visit change 37904. To unsubscribe, or for help writing mail filters, visit settings.