zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/mfd/lpc_sch.c b/ap/os/linux/linux-3.4.x/drivers/mfd/lpc_sch.c
new file mode 100644
index 0000000..abc4213
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/mfd/lpc_sch.c
@@ -0,0 +1,185 @@
+/*
+ * lpc_sch.c - LPC interface for Intel Poulsbo SCH
+ *
+ * LPC bridge function of the Intel SCH contains many other
+ * functional units, such as Interrupt controllers, Timers,
+ * Power Management, System Management, GPIO, RTC, and LPC
+ * Configuration Registers.
+ *
+ * Copyright (c) 2010 CompuLab Ltd
+ * Author: Denis Turischev <denis@compulab.co.il>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License 2 as published
+ * by the Free Software Foundation.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/acpi.h>
+#include <linux/pci.h>
+#include <linux/mfd/core.h>
+
+#define SMBASE 0x40
+#define SMBUS_IO_SIZE 64
+
+#define GPIOBASE 0x44
+#define GPIO_IO_SIZE 64
+
+#define WDTBASE 0x84
+#define WDT_IO_SIZE 64
+
+static struct resource smbus_sch_resource = {
+ .flags = IORESOURCE_IO,
+};
+
+
+static struct resource gpio_sch_resource = {
+ .flags = IORESOURCE_IO,
+};
+
+static struct mfd_cell lpc_sch_cells[] = {
+ {
+ .name = "isch_smbus",
+ .num_resources = 1,
+ .resources = &smbus_sch_resource,
+ },
+ {
+ .name = "sch_gpio",
+ .num_resources = 1,
+ .resources = &gpio_sch_resource,
+ },
+};
+
+static struct resource wdt_sch_resource = {
+ .flags = IORESOURCE_IO,
+};
+
+static struct mfd_cell tunnelcreek_cells[] = {
+ {
+ .name = "tunnelcreek_wdt",
+ .num_resources = 1,
+ .resources = &wdt_sch_resource,
+ },
+};
+
+static DEFINE_PCI_DEVICE_TABLE(lpc_sch_ids) = {
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SCH_LPC) },
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_ITC_LPC) },
+ { 0, }
+};
+MODULE_DEVICE_TABLE(pci, lpc_sch_ids);
+
+static int __devinit lpc_sch_probe(struct pci_dev *dev,
+ const struct pci_device_id *id)
+{
+ unsigned int base_addr_cfg;
+ unsigned short base_addr;
+ int i;
+ int ret;
+
+ pci_read_config_dword(dev, SMBASE, &base_addr_cfg);
+ if (!(base_addr_cfg & (1 << 31))) {
+ dev_err(&dev->dev, "Decode of the SMBus I/O range disabled\n");
+ return -ENODEV;
+ }
+ base_addr = (unsigned short)base_addr_cfg;
+ if (base_addr == 0) {
+ dev_err(&dev->dev, "I/O space for SMBus uninitialized\n");
+ return -ENODEV;
+ }
+
+ smbus_sch_resource.start = base_addr;
+ smbus_sch_resource.end = base_addr + SMBUS_IO_SIZE - 1;
+
+ pci_read_config_dword(dev, GPIOBASE, &base_addr_cfg);
+ if (!(base_addr_cfg & (1 << 31))) {
+ dev_err(&dev->dev, "Decode of the GPIO I/O range disabled\n");
+ return -ENODEV;
+ }
+ base_addr = (unsigned short)base_addr_cfg;
+ if (base_addr == 0) {
+ dev_err(&dev->dev, "I/O space for GPIO uninitialized\n");
+ return -ENODEV;
+ }
+
+ gpio_sch_resource.start = base_addr;
+ gpio_sch_resource.end = base_addr + GPIO_IO_SIZE - 1;
+
+ for (i=0; i < ARRAY_SIZE(lpc_sch_cells); i++)
+ lpc_sch_cells[i].id = id->device;
+
+ ret = mfd_add_devices(&dev->dev, 0,
+ lpc_sch_cells, ARRAY_SIZE(lpc_sch_cells), NULL, 0);
+ if (ret)
+ goto out_dev;
+
+ if (id->device == PCI_DEVICE_ID_INTEL_ITC_LPC) {
+ pci_read_config_dword(dev, WDTBASE, &base_addr_cfg);
+ if (!(base_addr_cfg & (1 << 31))) {
+ dev_err(&dev->dev, "Decode of the WDT I/O range disabled\n");
+ ret = -ENODEV;
+ goto out_dev;
+ }
+ base_addr = (unsigned short)base_addr_cfg;
+ if (base_addr == 0) {
+ dev_err(&dev->dev, "I/O space for WDT uninitialized\n");
+ ret = -ENODEV;
+ goto out_dev;
+ }
+
+ wdt_sch_resource.start = base_addr;
+ wdt_sch_resource.end = base_addr + WDT_IO_SIZE - 1;
+
+ for (i = 0; i < ARRAY_SIZE(tunnelcreek_cells); i++)
+ tunnelcreek_cells[i].id = id->device;
+
+ ret = mfd_add_devices(&dev->dev, 0, tunnelcreek_cells,
+ ARRAY_SIZE(tunnelcreek_cells), NULL, 0);
+ }
+
+ return ret;
+out_dev:
+ mfd_remove_devices(&dev->dev);
+ return ret;
+}
+
+static void __devexit lpc_sch_remove(struct pci_dev *dev)
+{
+ mfd_remove_devices(&dev->dev);
+}
+
+static struct pci_driver lpc_sch_driver = {
+ .name = "lpc_sch",
+ .id_table = lpc_sch_ids,
+ .probe = lpc_sch_probe,
+ .remove = __devexit_p(lpc_sch_remove),
+};
+
+static int __init lpc_sch_init(void)
+{
+ return pci_register_driver(&lpc_sch_driver);
+}
+
+static void __exit lpc_sch_exit(void)
+{
+ pci_unregister_driver(&lpc_sch_driver);
+}
+
+module_init(lpc_sch_init);
+module_exit(lpc_sch_exit);
+
+MODULE_AUTHOR("Denis Turischev <denis@compulab.co.il>");
+MODULE_DESCRIPTION("LPC interface for Intel Poulsbo SCH");
+MODULE_LICENSE("GPL");