Patch set updated for coreboot: drivers/i2c/tps68470: Add TPS68470 PMIC SSDT generator

[Rizwan Qureshi]

Rizwan Qureshi ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/18063

-gerrit

commit f79ffd16ae604db3bdcfa06bb21ff1630f98a0d6
Author: Rizwan Qureshi 
Date:   Mon Jan 9 19:00:06 2017 +0530

drivers/i2c/tps68470: Add TPS68470 PMIC SSDT generator

Add TPS68470 PMIC SSDT generator.

Change-Id: Iaa1dba094a7f791d5b624e545b03b510a4306337
    Signed-off-by: Rizwan Qureshi 
---
 src/drivers/i2c/tps68470/Kconfig      |  2 +
 src/drivers/i2c/tps68470/Makefile.inc |  1 +
 src/drivers/i2c/tps68470/chip.h       | 26 ++++++++++
 src/drivers/i2c/tps68470/tps68470.c   | 94 +++++++++++++++++++++++++++++++++++
 4 files changed, 123 insertions(+)

diff --git a/src/drivers/i2c/tps68470/Kconfig b/src/drivers/i2c/tps68470/Kconfig
new file mode 100644
index 0000000..75d81dc
--- /dev/null
+++ b/src/drivers/i2c/tps68470/Kconfig
@@ -0,0 +1,2 @@
+config DRIVERS_I2C_TPS68470
+	bool
diff --git a/src/drivers/i2c/tps68470/Makefile.inc b/src/drivers/i2c/tps68470/Makefile.inc
new file mode 100644
index 0000000..3fa4412
--- /dev/null
+++ b/src/drivers/i2c/tps68470/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_DRIVERS_I2C_TPS68470) += tps68470.c
diff --git a/src/drivers/i2c/tps68470/chip.h b/src/drivers/i2c/tps68470/chip.h
new file mode 100644
index 0000000..d82d9bd
--- /dev/null
+++ b/src/drivers/i2c/tps68470/chip.h
@@ -0,0 +1,26 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2017 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/acpi_device.h>
+
+#define TPS68470_MAX_CLDB_BUF 32
+
+struct drivers_i2c_tps68470_config {
+
+	/* I2C Bus Frequency in Hertz (default 400kHz) */
+	unsigned bus_speed;
+
+	uint8_t cldb_buf[TPS68470_MAX_CLDB_BUF];
+};
diff --git a/src/drivers/i2c/tps68470/tps68470.c b/src/drivers/i2c/tps68470/tps68470.c
new file mode 100644
index 0000000..f7c2ce1
--- /dev/null
+++ b/src/drivers/i2c/tps68470/tps68470.c
@@ -0,0 +1,94 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2017 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/acpi.h>
+#include <arch/acpi_device.h>
+#include <arch/acpigen.h>
+#include <console/console.h>
+#include <device/i2c.h>
+#include <device/device.h>
+#include <device/path.h>
+#include <stdint.h>
+#include <string.h>
+#include "chip.h"
+
+#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+
+#define TPS68470_ACPI_NAME "PMIC"
+
+static void tps68470_fill_ssdt(struct device *dev)
+{
+	struct drivers_i2c_tps68470_config *config = dev->chip_info;
+	const char *scope = acpi_device_scope(dev);
+	struct acpi_i2c i2c = {
+		.address = dev->path.i2c.device,
+		.mode_10bit = dev->path.i2c.mode_10bit,
+		.speed = config->bus_speed ? : I2C_SPEED_FAST,
+		.resource = scope,
+	};
+
+	if (!dev->enabled || !scope)
+		return;
+
+	/* Device */
+	acpigen_write_scope(scope);
+	acpigen_write_device(acpi_device_name(dev));
+	acpigen_write_name_string("_HID", "INT3472");
+	acpigen_write_name_integer("_UID", 0);
+	acpigen_write_name_string("_DDN", dev->chip_ops->name);
+	acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON);
+
+	/* Resources */
+	acpigen_write_name("_CRS");
+	acpigen_write_resourcetemplate_header();
+	acpi_device_write_i2c(&i2c);
+	acpigen_write_resourcetemplate_footer();
+
+	/* Device Properties */
+	acpigen_write_method_serialized("CLDB",0);
+	acpigen_write_return_byte_buffer(config->cldb_buf,
+					TPS68470_MAX_CLDB_BUF);
+
+	acpigen_pop_len(); /* Method */
+	acpigen_pop_len(); /* Device */
+	acpigen_pop_len(); /* Scope */
+
+}
+
+static const char *tps68470_acpi_name(struct device *dev)
+{
+	return TPS68470_ACPI_NAME;
+}
+#endif
+
+static struct device_operations tps68470_ops = {
+	.read_resources		  = DEVICE_NOOP,
+	.set_resources		  = DEVICE_NOOP,
+	.enable_resources	  = DEVICE_NOOP,
+#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+	.acpi_name                = &tps68470_acpi_name,
+	.acpi_fill_ssdt_generator = &tps68470_fill_ssdt,
+#endif
+};
+
+static void tps68470_enable(struct device *dev)
+{
+	dev->ops = &tps68470_ops;
+}
+
+struct chip_operations drivers_i2c_tps68470_ops = {
+	CHIP_NAME("TPS 68470 PMIC")
+	.enable_dev = &tps68470_enable
+};