1 files changed, 811 insertions, 0 deletions

diff --git a/arch/x86/platform/mrst/mrst.c b/arch/x86/platform/mrst/mrst.c
new file mode 100644
index 000000000000..7000e74b3087
--- /dev/null
+++ b/arch/x86/platform/mrst/mrst.c
@@ -0,0 +1,811 @@
+/*
+ * mrst.c: Intel Moorestown platform specific setup code
+ *
+ * (C) Copyright 2008 Intel Corporation
+ * Author: Jacob Pan (jacob.jun.pan@intel.com)
+ *
+ * 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.
+ */
+
+#define pr_fmt(fmt) "mrst: " fmt
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sfi.h>
+#include <linux/intel_pmic_gpio.h>
+#include <linux/spi/spi.h>
+#include <linux/i2c.h>
+#include <linux/i2c/pca953x.h>
+#include <linux/gpio_keys.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+
+#include <asm/setup.h>
+#include <asm/mpspec_def.h>
+#include <asm/hw_irq.h>
+#include <asm/apic.h>
+#include <asm/io_apic.h>
+#include <asm/mrst.h>
+#include <asm/mrst-vrtc.h>
+#include <asm/io.h>
+#include <asm/i8259.h>
+#include <asm/intel_scu_ipc.h>
+#include <asm/apb_timer.h>
+#include <asm/reboot.h>
+
+/*
+ * the clockevent devices on Moorestown/Medfield can be APBT or LAPIC clock,
+ * cmdline option x86_mrst_timer can be used to override the configuration
+ * to prefer one or the other.
+ * at runtime, there are basically three timer configurations:
+ * 1. per cpu apbt clock only
+ * 2. per cpu always-on lapic clocks only, this is Penwell/Medfield only
+ * 3. per cpu lapic clock (C3STOP) and one apbt clock, with broadcast.
+ *
+ * by default (without cmdline option), platform code first detects cpu type
+ * to see if we are on lincroft or penwell, then set up both lapic or apbt
+ * clocks accordingly.
+ * i.e. by default, medfield uses configuration #2, moorestown uses #1.
+ * config #3 is supported but not recommended on medfield.
+ *
+ * rating and feature summary:
+ * lapic (with C3STOP) --------- 100
+ * apbt (always-on) ------------ 110
+ * lapic (always-on,ARAT) ------ 150
+ */
+
+__cpuinitdata enum mrst_timer_options mrst_timer_options;
+
+static u32 sfi_mtimer_usage[SFI_MTMR_MAX_NUM];
+static struct sfi_timer_table_entry sfi_mtimer_array[SFI_MTMR_MAX_NUM];
+enum mrst_cpu_type __mrst_cpu_chip;
+EXPORT_SYMBOL_GPL(__mrst_cpu_chip);
+
+int sfi_mtimer_num;
+
+struct sfi_rtc_table_entry sfi_mrtc_array[SFI_MRTC_MAX];
+EXPORT_SYMBOL_GPL(sfi_mrtc_array);
+int sfi_mrtc_num;
+
+/* parse all the mtimer info to a static mtimer array */
+static int __init sfi_parse_mtmr(struct sfi_table_header *table)
+{
+        struct sfi_table_simple *sb;
+        struct sfi_timer_table_entry *pentry;
+        struct mpc_intsrc mp_irq;
+        int totallen;
+
+        sb = (struct sfi_table_simple *)table;
+        if (!sfi_mtimer_num) {
+                sfi_mtimer_num = SFI_GET_NUM_ENTRIES(sb,
+                                        struct sfi_timer_table_entry);
+                pentry = (struct sfi_timer_table_entry *) sb->pentry;
+                totallen = sfi_mtimer_num * sizeof(*pentry);
+                memcpy(sfi_mtimer_array, pentry, totallen);
+        }
+
+        pr_debug("SFI MTIMER info (num = %d):\n", sfi_mtimer_num);
+        pentry = sfi_mtimer_array;
+        for (totallen = 0; totallen < sfi_mtimer_num; totallen++, pentry++) {
+                pr_debug("timer[%d]: paddr = 0x%08x, freq = %dHz,"
+                        " irq = %d\n", totallen, (u32)pentry->phys_addr,
+                        pentry->freq_hz, pentry->irq);
+                        if (!pentry->irq)
+                                continue;
+                        mp_irq.type = MP_INTSRC;
+                        mp_irq.irqtype = mp_INT;
+/* triggering mode edge bit 2-3, active high polarity bit 0-1 */
+                        mp_irq.irqflag = 5;
+                        mp_irq.srcbus = MP_BUS_ISA;
+                        mp_irq.srcbusirq = pentry->irq; /* IRQ */
+                        mp_irq.dstapic = MP_APIC_ALL;
+                        mp_irq.dstirq = pentry->irq;
+                        mp_save_irq(&mp_irq);
+        }
+
+        return 0;
+}
+
+struct sfi_timer_table_entry *sfi_get_mtmr(int hint)
+{
+        int i;
+        if (hint < sfi_mtimer_num) {
+                if (!sfi_mtimer_usage[hint]) {
+                        pr_debug("hint taken for timer %d irq %d\n",\
+                                hint, sfi_mtimer_array[hint].irq);
+                        sfi_mtimer_usage[hint] = 1;
+                        return &sfi_mtimer_array[hint];
+                }
+        }
+        /* take the first timer available */
+        for (i = 0; i < sfi_mtimer_num;) {
+                if (!sfi_mtimer_usage[i]) {
+                        sfi_mtimer_usage[i] = 1;
+                        return &sfi_mtimer_array[i];
+                }
+                i++;
+        }
+        return NULL;
+}
+
+void sfi_free_mtmr(struct sfi_timer_table_entry *mtmr)
+{
+        int i;
+        for (i = 0; i < sfi_mtimer_num;) {
+                if (mtmr->irq == sfi_mtimer_array[i].irq) {
+                        sfi_mtimer_usage[i] = 0;
+                        return;
+                }
+                i++;
+        }
+}
+
+/* parse all the mrtc info to a global mrtc array */
+int __init sfi_parse_mrtc(struct sfi_table_header *table)
+{
+        struct sfi_table_simple *sb;
+        struct sfi_rtc_table_entry *pentry;
+        struct mpc_intsrc mp_irq;
+
+        int totallen;
+
+        sb = (struct sfi_table_simple *)table;
+        if (!sfi_mrtc_num) {
+                sfi_mrtc_num = SFI_GET_NUM_ENTRIES(sb,
+                                                struct sfi_rtc_table_entry);
+                pentry = (struct sfi_rtc_table_entry *)sb->pentry;
+                totallen = sfi_mrtc_num * sizeof(*pentry);
+                memcpy(sfi_mrtc_array, pentry, totallen);
+        }
+
+        pr_debug("SFI RTC info (num = %d):\n", sfi_mrtc_num);
+        pentry = sfi_mrtc_array;
+        for (totallen = 0; totallen < sfi_mrtc_num; totallen++, pentry++) {
+                pr_debug("RTC[%d]: paddr = 0x%08x, irq = %d\n",
+                        totallen, (u32)pentry->phys_addr, pentry->irq);
+                mp_irq.type = MP_INTSRC;
+                mp_irq.irqtype = mp_INT;
+                mp_irq.irqflag = 0xf;   /* level trigger and active low */
+                mp_irq.srcbus = MP_BUS_ISA;
+                mp_irq.srcbusirq = pentry->irq; /* IRQ */
+                mp_irq.dstapic = MP_APIC_ALL;
+                mp_irq.dstirq = pentry->irq;
+                mp_save_irq(&mp_irq);
+        }
+        return 0;
+}
+
+static unsigned long __init mrst_calibrate_tsc(void)
+{
+        unsigned long flags, fast_calibrate;
+
+        local_irq_save(flags);
+        fast_calibrate = apbt_quick_calibrate();
+        local_irq_restore(flags);
+
+        if (fast_calibrate)
+                return fast_calibrate;
+
+        return 0;
+}
+
+static void __init mrst_time_init(void)
+{
+        sfi_table_parse(SFI_SIG_MTMR, NULL, NULL, sfi_parse_mtmr);
+        switch (mrst_timer_options) {
+        case MRST_TIMER_APBT_ONLY:
+                break;
+        case MRST_TIMER_LAPIC_APBT:
+                x86_init.timers.setup_percpu_clockev = setup_boot_APIC_clock;
+                x86_cpuinit.setup_percpu_clockev = setup_secondary_APIC_clock;
+                break;
+        default:
+                if (!boot_cpu_has(X86_FEATURE_ARAT))
+                        break;
+                x86_init.timers.setup_percpu_clockev = setup_boot_APIC_clock;
+                x86_cpuinit.setup_percpu_clockev = setup_secondary_APIC_clock;
+                return;
+        }
+        /* we need at least one APB timer */
+        pre_init_apic_IRQ0();
+        apbt_time_init();
+}
+
+static void __cpuinit mrst_arch_setup(void)
+{
+        if (boot_cpu_data.x86 == 6 && boot_cpu_data.x86_model == 0x27)
+                __mrst_cpu_chip = MRST_CPU_CHIP_PENWELL;
+        else if (boot_cpu_data.x86 == 6 && boot_cpu_data.x86_model == 0x26)
+                __mrst_cpu_chip = MRST_CPU_CHIP_LINCROFT;
+        else {
+                pr_err("Unknown Moorestown CPU (%d:%d), default to Lincroft\n",
+                        boot_cpu_data.x86, boot_cpu_data.x86_model);
+                __mrst_cpu_chip = MRST_CPU_CHIP_LINCROFT;
+        }
+        pr_debug("Moorestown CPU %s identified\n",
+                (__mrst_cpu_chip == MRST_CPU_CHIP_LINCROFT) ?
+                "Lincroft" : "Penwell");
+}
+
+/* MID systems don't have i8042 controller */
+static int mrst_i8042_detect(void)
+{
+        return 0;
+}
+
+/* Reboot and power off are handled by the SCU on a MID device */
+static void mrst_power_off(void)
+{
+        intel_scu_ipc_simple_command(0xf1, 1);
+}
+
+static void mrst_reboot(void)
+{
+        intel_scu_ipc_simple_command(0xf1, 0);
+}
+
+/*
+ * Moorestown specific x86_init function overrides and early setup
+ * calls.
+ */
+void __init x86_mrst_early_setup(void)
+{
+        x86_init.resources.probe_roms = x86_init_noop;
+        x86_init.resources.reserve_resources = x86_init_noop;
+
+        x86_init.timers.timer_init = mrst_time_init;
+        x86_init.timers.setup_percpu_clockev = x86_init_noop;
+
+        x86_init.irqs.pre_vector_init = x86_init_noop;
+
+        x86_init.oem.arch_setup = mrst_arch_setup;
+
+        x86_cpuinit.setup_percpu_clockev = apbt_setup_secondary_clock;
+
+        x86_platform.calibrate_tsc = mrst_calibrate_tsc;
+        x86_platform.i8042_detect = mrst_i8042_detect;
+        x86_init.timers.wallclock_init = mrst_rtc_init;
+        x86_init.pci.init = pci_mrst_init;
+        x86_init.pci.fixup_irqs = x86_init_noop;
+
+        legacy_pic = &null_legacy_pic;
+
+        /* Moorestown specific power_off/restart method */
+        pm_power_off = mrst_power_off;
+        machine_ops.emergency_restart  = mrst_reboot;
+
+        /* Avoid searching for BIOS MP tables */
+        x86_init.mpparse.find_smp_config = x86_init_noop;
+        x86_init.mpparse.get_smp_config = x86_init_uint_noop;
+        set_bit(MP_BUS_ISA, mp_bus_not_pci);
+}
+
+/*
+ * if user does not want to use per CPU apb timer, just give it a lower rating
+ * than local apic timer and skip the late per cpu timer init.
+ */
+static inline int __init setup_x86_mrst_timer(char *arg)
+{
+        if (!arg)
+                return -EINVAL;
+
+        if (strcmp("apbt_only", arg) == 0)
+                mrst_timer_options = MRST_TIMER_APBT_ONLY;
+        else if (strcmp("lapic_and_apbt", arg) == 0)
+                mrst_timer_options = MRST_TIMER_LAPIC_APBT;
+        else {
+                pr_warning("X86 MRST timer option %s not recognised"
+                           " use x86_mrst_timer=apbt_only or lapic_and_apbt\n",
+                           arg);
+                return -EINVAL;
+        }
+        return 0;
+}
+__setup("x86_mrst_timer=", setup_x86_mrst_timer);
+
+/*
+ * Parsing GPIO table first, since the DEVS table will need this table
+ * to map the pin name to the actual pin.
+ */
+static struct sfi_gpio_table_entry *gpio_table;
+static int gpio_num_entry;
+
+static int __init sfi_parse_gpio(struct sfi_table_header *table)
+{
+        struct sfi_table_simple *sb;
+        struct sfi_gpio_table_entry *pentry;
+        int num, i;
+
+        if (gpio_table)
+                return 0;
+        sb = (struct sfi_table_simple *)table;
+        num = SFI_GET_NUM_ENTRIES(sb, struct sfi_gpio_table_entry);
+        pentry = (struct sfi_gpio_table_entry *)sb->pentry;
+
+        gpio_table = (struct sfi_gpio_table_entry *)
+                                kmalloc(num * sizeof(*pentry), GFP_KERNEL);
+        if (!gpio_table)
+                return -1;
+        memcpy(gpio_table, pentry, num * sizeof(*pentry));
+        gpio_num_entry = num;
+
+        pr_debug("GPIO pin info:\n");
+        for (i = 0; i < num; i++, pentry++)
+                pr_debug("info[%2d]: controller = %16.16s, pin_name = %16.16s,"
+                " pin = %d\n", i,
+                        pentry->controller_name,
+                        pentry->pin_name,
+                        pentry->pin_no);
+        return 0;
+}
+
+static int get_gpio_by_name(const char *name)
+{
+        struct sfi_gpio_table_entry *pentry = gpio_table;
+        int i;
+
+        if (!pentry)
+                return -1;
+        for (i = 0; i < gpio_num_entry; i++, pentry++) {
+                if (!strncmp(name, pentry->pin_name, SFI_NAME_LEN))
+                        return pentry->pin_no;
+        }
+        return -1;
+}
+
+/*
+ * Here defines the array of devices platform data that IAFW would export
+ * through SFI "DEVS" table, we use name and type to match the device and
+ * its platform data.
+ */
+struct devs_id {
+        char name[SFI_NAME_LEN + 1];
+        u8 type;
+        u8 delay;
+        void *(*get_platform_data)(void *info);
+};
+
+/* the offset for the mapping of global gpio pin to irq */
+#define MRST_IRQ_OFFSET 0x100
+
+static void __init *pmic_gpio_platform_data(void *info)
+{
+        static struct intel_pmic_gpio_platform_data pmic_gpio_pdata;
+        int gpio_base = get_gpio_by_name("pmic_gpio_base");
+
+        if (gpio_base == -1)
+                gpio_base = 64;
+        pmic_gpio_pdata.gpio_base = gpio_base;
+        pmic_gpio_pdata.irq_base = gpio_base + MRST_IRQ_OFFSET;
+        pmic_gpio_pdata.gpiointr = 0xffffeff8;
+
+        return &pmic_gpio_pdata;
+}
+
+static void __init *max3111_platform_data(void *info)
+{
+        struct spi_board_info *spi_info = info;
+        int intr = get_gpio_by_name("max3111_int");
+
+        if (intr == -1)
+                return NULL;
+        spi_info->irq = intr + MRST_IRQ_OFFSET;
+        return NULL;
+}
+
+/* we have multiple max7315 on the board ... */
+#define MAX7315_NUM 2
+static void __init *max7315_platform_data(void *info)
+{
+        static struct pca953x_platform_data max7315_pdata[MAX7315_NUM];
+        static int nr;
+        struct pca953x_platform_data *max7315 = &max7315_pdata[nr];
+        struct i2c_board_info *i2c_info = info;
+        int gpio_base, intr;
+        char base_pin_name[SFI_NAME_LEN + 1];
+        char intr_pin_name[SFI_NAME_LEN + 1];
+
+        if (nr == MAX7315_NUM) {
+                pr_err("too many max7315s, we only support %d\n",
+                                MAX7315_NUM);
+                return NULL;
+        }
+        /* we have several max7315 on the board, we only need load several
+         * instances of the same pca953x driver to cover them
+         */
+        strcpy(i2c_info->type, "max7315");
+        if (nr++) {
+                sprintf(base_pin_name, "max7315_%d_base", nr);
+                sprintf(intr_pin_name, "max7315_%d_int", nr);
+        } else {
+                strcpy(base_pin_name, "max7315_base");
+                strcpy(intr_pin_name, "max7315_int");
+        }
+
+        gpio_base = get_gpio_by_name(base_pin_name);
+        intr = get_gpio_by_name(intr_pin_name);
+
+        if (gpio_base == -1)
+                return NULL;
+        max7315->gpio_base = gpio_base;
+        if (intr != -1) {
+                i2c_info->irq = intr + MRST_IRQ_OFFSET;
+                max7315->irq_base = gpio_base + MRST_IRQ_OFFSET;
+        } else {
+                i2c_info->irq = -1;
+                max7315->irq_base = -1;
+        }
+        return max7315;
+}
+
+static void __init *emc1403_platform_data(void *info)
+{
+        static short intr2nd_pdata;
+        struct i2c_board_info *i2c_info = info;
+        int intr = get_gpio_by_name("thermal_int");
+        int intr2nd = get_gpio_by_name("thermal_alert");
+
+        if (intr == -1 || intr2nd == -1)
+                return NULL;
+
+        i2c_info->irq = intr + MRST_IRQ_OFFSET;
+        intr2nd_pdata = intr2nd + MRST_IRQ_OFFSET;
+
+        return &intr2nd_pdata;
+}
+
+static void __init *lis331dl_platform_data(void *info)
+{
+        static short intr2nd_pdata;
+        struct i2c_board_info *i2c_info = info;
+        int intr = get_gpio_by_name("accel_int");
+        int intr2nd = get_gpio_by_name("accel_2");
+
+        if (intr == -1 || intr2nd == -1)
+                return NULL;
+
+        i2c_info->irq = intr + MRST_IRQ_OFFSET;
+        intr2nd_pdata = intr2nd + MRST_IRQ_OFFSET;
+
+        return &intr2nd_pdata;
+}
+
+static void __init *no_platform_data(void *info)
+{
+        return NULL;
+}
+
+static const struct devs_id __initconst device_ids[] = {
+        {"pmic_gpio", SFI_DEV_TYPE_SPI, 1, &pmic_gpio_platform_data},
+        {"spi_max3111", SFI_DEV_TYPE_SPI, 0, &max3111_platform_data},
+        {"i2c_max7315", SFI_DEV_TYPE_I2C, 1, &max7315_platform_data},
+        {"i2c_max7315_2", SFI_DEV_TYPE_I2C, 1, &max7315_platform_data},
+        {"emc1403", SFI_DEV_TYPE_I2C, 1, &emc1403_platform_data},
+        {"i2c_accel", SFI_DEV_TYPE_I2C, 0, &lis331dl_platform_data},
+        {"pmic_audio", SFI_DEV_TYPE_IPC, 1, &no_platform_data},
+        {"msic_audio", SFI_DEV_TYPE_IPC, 1, &no_platform_data},
+        {},
+};
+
+#define MAX_IPCDEVS     24
+static struct platform_device *ipc_devs[MAX_IPCDEVS];
+static int ipc_next_dev;
+
+#define MAX_SCU_SPI     24
+static struct spi_board_info *spi_devs[MAX_SCU_SPI];
+static int spi_next_dev;
+
+#define MAX_SCU_I2C     24
+static struct i2c_board_info *i2c_devs[MAX_SCU_I2C];
+static int i2c_bus[MAX_SCU_I2C];
+static int i2c_next_dev;
+
+static void __init intel_scu_device_register(struct platform_device *pdev)
+{
+        if(ipc_next_dev == MAX_IPCDEVS)
+                pr_err("too many SCU IPC devices");
+        else
+                ipc_devs[ipc_next_dev++] = pdev;
+}
+
+static void __init intel_scu_spi_device_register(struct spi_board_info *sdev)
+{
+        struct spi_board_info *new_dev;
+
+        if (spi_next_dev == MAX_SCU_SPI) {
+                pr_err("too many SCU SPI devices");
+                return;
+        }
+
+        new_dev = kzalloc(sizeof(*sdev), GFP_KERNEL);
+        if (!new_dev) {
+                pr_err("failed to alloc mem for delayed spi dev %s\n",
+                        sdev->modalias);
+                return;
+        }
+        memcpy(new_dev, sdev, sizeof(*sdev));
+
+        spi_devs[spi_next_dev++] = new_dev;
+}
+
+static void __init intel_scu_i2c_device_register(int bus,
+                                                struct i2c_board_info *idev)
+{
+        struct i2c_board_info *new_dev;
+
+        if (i2c_next_dev == MAX_SCU_I2C) {
+                pr_err("too many SCU I2C devices");
+                return;
+        }
+
+        new_dev = kzalloc(sizeof(*idev), GFP_KERNEL);
+        if (!new_dev) {
+                pr_err("failed to alloc mem for delayed i2c dev %s\n",
+                        idev->type);
+                return;
+        }
+        memcpy(new_dev, idev, sizeof(*idev));
+
+        i2c_bus[i2c_next_dev] = bus;
+        i2c_devs[i2c_next_dev++] = new_dev;
+}
+
+/* Called by IPC driver */
+void intel_scu_devices_create(void)
+{
+        int i;
+
+        for (i = 0; i < ipc_next_dev; i++)
+                platform_device_add(ipc_devs[i]);
+
+        for (i = 0; i < spi_next_dev; i++)
+                spi_register_board_info(spi_devs[i], 1);
+
+        for (i = 0; i < i2c_next_dev; i++) {
+                struct i2c_adapter *adapter;
+                struct i2c_client *client;
+
+                adapter = i2c_get_adapter(i2c_bus[i]);
+                if (adapter) {
+                        client = i2c_new_device(adapter, i2c_devs[i]);
+                        if (!client)
+                                pr_err("can't create i2c device %s\n",
+                                        i2c_devs[i]->type);
+                } else
+                        i2c_register_board_info(i2c_bus[i], i2c_devs[i], 1);
+        }
+}
+EXPORT_SYMBOL_GPL(intel_scu_devices_create);
+
+/* Called by IPC driver */
+void intel_scu_devices_destroy(void)
+{
+        int i;
+
+        for (i = 0; i < ipc_next_dev; i++)
+                platform_device_del(ipc_devs[i]);
+}
+EXPORT_SYMBOL_GPL(intel_scu_devices_destroy);
+
+static void __init install_irq_resource(struct platform_device *pdev, int irq)
+{
+        /* Single threaded */
+        static struct resource __initdata res = {
+                .name = "IRQ",
+                .flags = IORESOURCE_IRQ,
+        };
+        res.start = irq;
+        platform_device_add_resources(pdev, &res, 1);
+}
+
+static void __init sfi_handle_ipc_dev(struct platform_device *pdev)
+{
+        const struct devs_id *dev = device_ids;
+        void *pdata = NULL;
+
+        while (dev->name[0]) {
+                if (dev->type == SFI_DEV_TYPE_IPC &&
+                        !strncmp(dev->name, pdev->name, SFI_NAME_LEN)) {
+                        pdata = dev->get_platform_data(pdev);
+                        break;
+                }
+                dev++;
+        }
+        pdev->dev.platform_data = pdata;
+        intel_scu_device_register(pdev);
+}
+
+static void __init sfi_handle_spi_dev(struct spi_board_info *spi_info)
+{
+        const struct devs_id *dev = device_ids;
+        void *pdata = NULL;
+
+        while (dev->name[0]) {
+                if (dev->type == SFI_DEV_TYPE_SPI &&
+                                !strncmp(dev->name, spi_info->modalias, SFI_NAME_LEN)) {
+                        pdata = dev->get_platform_data(spi_info);
+                        break;
+                }
+                dev++;
+        }
+        spi_info->platform_data = pdata;
+        if (dev->delay)
+                intel_scu_spi_device_register(spi_info);
+        else
+                spi_register_board_info(spi_info, 1);
+}
+
+static void __init sfi_handle_i2c_dev(int bus, struct i2c_board_info *i2c_info)
+{
+        const struct devs_id *dev = device_ids;
+        void *pdata = NULL;
+
+        while (dev->name[0]) {
+                if (dev->type == SFI_DEV_TYPE_I2C &&
+                        !strncmp(dev->name, i2c_info->type, SFI_NAME_LEN)) {
+                        pdata = dev->get_platform_data(i2c_info);
+                        break;
+                }
+                dev++;
+        }
+        i2c_info->platform_data = pdata;
+
+        if (dev->delay)
+                intel_scu_i2c_device_register(bus, i2c_info);
+        else
+                i2c_register_board_info(bus, i2c_info, 1);
+ }
+
+
+static int __init sfi_parse_devs(struct sfi_table_header *table)
+{
+        struct sfi_table_simple *sb;
+        struct sfi_device_table_entry *pentry;
+        struct spi_board_info spi_info;
+        struct i2c_board_info i2c_info;
+        struct platform_device *pdev;
+        int num, i, bus;
+        int ioapic;
+        struct io_apic_irq_attr irq_attr;
+
+        sb = (struct sfi_table_simple *)table;
+        num = SFI_GET_NUM_ENTRIES(sb, struct sfi_device_table_entry);
+        pentry = (struct sfi_device_table_entry *)sb->pentry;
+
+        for (i = 0; i < num; i++, pentry++) {
+                if (pentry->irq != (u8)0xff) { /* native RTE case */
+                        /* these SPI2 devices are not exposed to system as PCI
+                         * devices, but they have separate RTE entry in IOAPIC
+                         * so we have to enable them one by one here
+                         */
+                        ioapic = mp_find_ioapic(pentry->irq);
+                        irq_attr.ioapic = ioapic;
+                        irq_attr.ioapic_pin = pentry->irq;
+                        irq_attr.trigger = 1;
+                        irq_attr.polarity = 1;
+                        io_apic_set_pci_routing(NULL, pentry->irq, &irq_attr);
+                }
+                switch (pentry->type) {
+                case SFI_DEV_TYPE_IPC:
+                        /* ID as IRQ is a hack that will go away */
+                        pdev = platform_device_alloc(pentry->name, pentry->irq);
+                        if (pdev == NULL) {
+                                pr_err("out of memory for SFI platform device '%s'.\n",
+                                                        pentry->name);
+                                continue;
+                        }
+                        install_irq_resource(pdev, pentry->irq);
+                        pr_debug("info[%2d]: IPC bus, name = %16.16s, "
+                                "irq = 0x%2x\n", i, pentry->name, pentry->irq);
+                        sfi_handle_ipc_dev(pdev);
+                        break;
+                case SFI_DEV_TYPE_SPI:
+                        memset(&spi_info, 0, sizeof(spi_info));
+                        strncpy(spi_info.modalias, pentry->name, SFI_NAME_LEN);
+                        spi_info.irq = pentry->irq;
+                        spi_info.bus_num = pentry->host_num;
+                        spi_info.chip_select = pentry->addr;
+                        spi_info.max_speed_hz = pentry->max_freq;
+                        pr_debug("info[%2d]: SPI bus = %d, name = %16.16s, "
+                                "irq = 0x%2x, max_freq = %d, cs = %d\n", i,
+                                spi_info.bus_num,
+                                spi_info.modalias,
+                                spi_info.irq,
+                                spi_info.max_speed_hz,
+                                spi_info.chip_select);
+                        sfi_handle_spi_dev(&spi_info);
+                        break;
+                case SFI_DEV_TYPE_I2C:
+                        memset(&i2c_info, 0, sizeof(i2c_info));
+                        bus = pentry->host_num;
+                        strncpy(i2c_info.type, pentry->name, SFI_NAME_LEN);
+                        i2c_info.irq = pentry->irq;
+                        i2c_info.addr = pentry->addr;
+                        pr_debug("info[%2d]: I2C bus = %d, name = %16.16s, "
+                                "irq = 0x%2x, addr = 0x%x\n", i, bus,
+                                i2c_info.type,
+                                i2c_info.irq,
+                                i2c_info.addr);
+                        sfi_handle_i2c_dev(bus, &i2c_info);
+                        break;
+                case SFI_DEV_TYPE_UART:
+                case SFI_DEV_TYPE_HSI:
+                default:
+                        ;
+                }
+        }
+        return 0;
+}
+
+static int __init mrst_platform_init(void)
+{
+        sfi_table_parse(SFI_SIG_GPIO, NULL, NULL, sfi_parse_gpio);
+        sfi_table_parse(SFI_SIG_DEVS, NULL, NULL, sfi_parse_devs);
+        return 0;
+}
+arch_initcall(mrst_platform_init);
+
+/*
+ * we will search these buttons in SFI GPIO table (by name)
+ * and register them dynamically. Please add all possible
+ * buttons here, we will shrink them if no GPIO found.
+ */
+static struct gpio_keys_button gpio_button[] = {
+        {KEY_POWER,             -1, 1, "power_btn",     EV_KEY, 0, 3000},
+        {KEY_PROG1,             -1, 1, "prog_btn1",     EV_KEY, 0, 20},
+        {KEY_PROG2,             -1, 1, "prog_btn2",     EV_KEY, 0, 20},
+        {SW_LID,                -1, 1, "lid_switch",    EV_SW,  0, 20},
+        {KEY_VOLUMEUP,          -1, 1, "vol_up",        EV_KEY, 0, 20},
+        {KEY_VOLUMEDOWN,        -1, 1, "vol_down",      EV_KEY, 0, 20},
+        {KEY_CAMERA,            -1, 1, "camera_full",   EV_KEY, 0, 20},
+        {KEY_CAMERA_FOCUS,      -1, 1, "camera_half",   EV_KEY, 0, 20},
+        {SW_KEYPAD_SLIDE,       -1, 1, "MagSw1",        EV_SW,  0, 20},
+        {SW_KEYPAD_SLIDE,       -1, 1, "MagSw2",        EV_SW,  0, 20},
+};
+
+static struct gpio_keys_platform_data mrst_gpio_keys = {
+        .buttons        = gpio_button,
+        .rep            = 1,
+        .nbuttons       = -1, /* will fill it after search */
+};
+
+static struct platform_device pb_device = {
+        .name           = "gpio-keys",
+        .id             = -1,
+        .dev            = {
+                .platform_data  = &mrst_gpio_keys,
+        },
+};
+
+/*
+ * Shrink the non-existent buttons, register the gpio button
+ * device if there is some
+ */
+static int __init pb_keys_init(void)
+{
+        struct gpio_keys_button *gb = gpio_button;
+        int i, num, good = 0;
+
+        num = sizeof(gpio_button) / sizeof(struct gpio_keys_button);
+        for (i = 0; i < num; i++) {
+                gb[i].gpio = get_gpio_by_name(gb[i].desc);
+                if (gb[i].gpio == -1)
+                        continue;
+
+                if (i != good)
+                        gb[good] = gb[i];
+                good++;
+        }
+
+        if (good) {
+                mrst_gpio_keys.nbuttons = good;
+                return platform_device_register(&pb_device);
+        }
+        return 0;
+}
+late_initcall(pb_keys_init);