summaryrefslogtreecommitdiff
path: root/src/drivers/i2c
diff options
context:
space:
mode:
authorBarnali Sarkar <barnali.sarkar@intel.com>2016-11-12 00:55:53 +0530
committerFurquan Shaikh <furquan@google.com>2016-11-16 19:42:29 +0100
commitd899318b78c1871d9c423ea7bb395655e5ab6d5e (patch)
tree7b987ffe6a5698621a1fd7ab3b9d866ea177eb33 /src/drivers/i2c
parentdab15e24916695608a0ddd3ea260e1acd2bb7b07 (diff)
downloadcoreboot-d899318b78c1871d9c423ea7bb395655e5ab6d5e.tar.xz
drivers/i2c/alps: Add support for ALPS Touchpad driver
Add support for I2C ALPS Touchpad Device Driver. BUG=none BRANCH=none TEST=Build and booted successfully on KBL RVP and Touchpad is working Change-Id: I78b77bd7c4694ccf61260724f593bd59545c70e6 Signed-off-by: Barnali Sarkar <barnali.sarkar@intel.com> Reviewed-on: https://review.coreboot.org/17390 Tested-by: build bot (Jenkins) Reviewed-by: Furquan Shaikh <furquan@google.com>
Diffstat (limited to 'src/drivers/i2c')
-rw-r--r--src/drivers/i2c/alps/Kconfig3
-rw-r--r--src/drivers/i2c/alps/Makefile.inc1
-rw-r--r--src/drivers/i2c/alps/alps.c59
-rw-r--r--src/drivers/i2c/alps/chip.h30
4 files changed, 93 insertions, 0 deletions
diff --git a/src/drivers/i2c/alps/Kconfig b/src/drivers/i2c/alps/Kconfig
new file mode 100644
index 0000000000..b49581d4aa
--- /dev/null
+++ b/src/drivers/i2c/alps/Kconfig
@@ -0,0 +1,3 @@
+config DRIVERS_I2C_ALPS
+ bool
+ select DRIVERS_I2C_GENERIC
diff --git a/src/drivers/i2c/alps/Makefile.inc b/src/drivers/i2c/alps/Makefile.inc
new file mode 100644
index 0000000000..aa18034a03
--- /dev/null
+++ b/src/drivers/i2c/alps/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_DRIVERS_I2C_ALPS) += alps.c
diff --git a/src/drivers/i2c/alps/alps.c b/src/drivers/i2c/alps/alps.c
new file mode 100644
index 0000000000..2686f6c0ca
--- /dev/null
+++ b/src/drivers/i2c/alps/alps.c
@@ -0,0 +1,59 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Intel Corporation.
+ *
+ * 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 <arch/acpigen_dsm.h>
+#include <device/device.h>
+#include <stdint.h>
+#include "chip.h"
+
+static void i2c_alps_fill_dsm(struct device *dev)
+{
+ struct drivers_i2c_alps_config *config = dev->chip_info;
+ struct dsm_i2c_hid_config dsm_config = {
+ .hid_desc_reg_offset = config->hid_desc_reg_offset,
+ };
+
+ acpigen_write_dsm_i2c_hid(&dsm_config);
+}
+
+static void i2c_alps_fill_ssdt_generator(struct device *dev)
+{
+ i2c_generic_fill_ssdt(dev, &i2c_alps_fill_dsm);
+}
+
+static const char *i2c_alps_acpi_name(struct device *dev)
+{
+ return "ALPS";
+}
+
+static struct device_operations i2c_alps_ops = {
+ .read_resources = DEVICE_NOOP,
+ .set_resources = DEVICE_NOOP,
+ .enable_resources = DEVICE_NOOP,
+#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+ .acpi_name = &i2c_alps_acpi_name,
+ .acpi_fill_ssdt_generator = &i2c_alps_fill_ssdt_generator,
+#endif
+};
+
+static void i2c_alps_enable(struct device *dev)
+{
+ dev->ops = &i2c_alps_ops;
+}
+
+struct chip_operations drivers_i2c_alps_ops = {
+ CHIP_NAME("ALPS I2C Device")
+ .enable_dev = &i2c_alps_enable
+};
diff --git a/src/drivers/i2c/alps/chip.h b/src/drivers/i2c/alps/chip.h
new file mode 100644
index 0000000000..fb0b0fab4f
--- /dev/null
+++ b/src/drivers/i2c/alps/chip.h
@@ -0,0 +1,30 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2016 Intel Corporation.
+ *
+ * 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.
+ */
+
+#ifndef __I2C_ALPS_CHIP_H__
+#define __I2C_ALPS_CHIP_H__
+
+#include <drivers/i2c/generic/chip.h>
+
+#define ALPS0001_HID "ALPS0001"
+#define PNP0C50_CID "PNP0C50"
+#define ALPS_TP_DESC "ALPS Touchpad"
+
+struct drivers_i2c_alps_config {
+ struct drivers_i2c_generic_config generic;
+ uint8_t hid_desc_reg_offset;
+};
+
+#endif /* __I2C_ALPS_CHIP_H__ */