Furquan Shaikh (furquan@google.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17092
-gerrit
commit 27f2a99ea340c5f9969ad28e41f089b91abdcb27 Author: Furquan Shaikh furquan@chromium.org Date: Fri Oct 21 16:42:45 2016 -0700
drivers/i2c/wacom_ts: Add support for WCOM touchscreen device driver
BUG=chrome-os-partner:57846
Change-Id: Id6bd91b3fd6420994ad5811d362618b1a38a8afa Signed-off-by: Furquan Shaikh furquan@chromium.org --- src/drivers/i2c/wacom_ts/Kconfig | 3 ++ src/drivers/i2c/wacom_ts/Makefile.inc | 1 + src/drivers/i2c/wacom_ts/chip.h | 7 ++++ src/drivers/i2c/wacom_ts/ts.c | 67 +++++++++++++++++++++++++++++++++++ 4 files changed, 78 insertions(+)
diff --git a/src/drivers/i2c/wacom_ts/Kconfig b/src/drivers/i2c/wacom_ts/Kconfig new file mode 100644 index 0000000..50da3f1 --- /dev/null +++ b/src/drivers/i2c/wacom_ts/Kconfig @@ -0,0 +1,3 @@ +config DRIVERS_I2C_WACOM_TS + bool + select DRIVERS_I2C_GENERIC diff --git a/src/drivers/i2c/wacom_ts/Makefile.inc b/src/drivers/i2c/wacom_ts/Makefile.inc new file mode 100644 index 0000000..9455099 --- /dev/null +++ b/src/drivers/i2c/wacom_ts/Makefile.inc @@ -0,0 +1 @@ +ramstage-$(CONFIG_DRIVERS_I2C_WACOM_TS) += ts.c diff --git a/src/drivers/i2c/wacom_ts/chip.h b/src/drivers/i2c/wacom_ts/chip.h new file mode 100644 index 0000000..6eb4641 --- /dev/null +++ b/src/drivers/i2c/wacom_ts/chip.h @@ -0,0 +1,7 @@ + +#include <drivers/i2c/generic/generic.h> + +struct drivers_i2c_wacom_ts_config { + I2C_GENERIC_CONFIG; + uint8_t hid_desc_reg_offset; +}; diff --git a/src/drivers/i2c/wacom_ts/ts.c b/src/drivers/i2c/wacom_ts/ts.c new file mode 100644 index 0000000..0b221ac --- /dev/null +++ b/src/drivers/i2c/wacom_ts/ts.c @@ -0,0 +1,67 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2016 Google Inc. + * + * 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/acpi_device.h> +#include <arch/acpigen.h> +#include <arch/acpigen_dsm.h> +#include <console/console.h> +#include <device/i2c.h> +#include <device/device.h> +#include <device/path.h> +#include <drivers/i2c/generic/generic.h> +#include <gpio.h> +#include <stdint.h> +#include <string.h> +#include "chip.h" + +static void i2c_wacom_ts_fill_dsm(struct device *dev) +{ + struct drivers_i2c_wacom_ts_config *config = dev->chip_info; + struct dsm_i2c_hid_config dsm_config; + + dsm_config.hid_desc_reg_offset = config->hid_desc_reg_offset; + + acpigen_write_dsm_i2c_hid(&dsm_config); +} + +static void i2c_wacom_ts_fill_ssdt_generator(struct device *dev) +{ + i2c_generic_fill_ssdt(dev, &i2c_wacom_ts_fill_dsm); +} + +static const char *i2c_wacom_ts_acpi_name(struct device *dev) +{ + return ("WCTS"); +} + +static struct device_operations i2c_wacom_ts_ops = { + .read_resources = DEVICE_NOOP, + .set_resources = DEVICE_NOOP, + .enable_resources = DEVICE_NOOP, +#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES) + .acpi_name = &i2c_wacom_ts_acpi_name, + .acpi_fill_ssdt_generator = &i2c_wacom_ts_fill_ssdt_generator, +#endif +}; + +static void i2c_wacom_ts_enable(struct device *dev) +{ + dev->ops = &i2c_wacom_ts_ops; +} + +struct chip_operations drivers_i2c_wacom_ts_ops = { + CHIP_NAME("Wacom Touchscreen Device") + .enable_dev = &i2c_wacom_ts_enable +};