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authorLinus Torvalds <torvalds@linux-foundation.org>2011-11-03 09:40:51 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-11-03 09:40:51 -0700
commita0a4194c943bc64dd7b6e26cccb036cb26b81363 (patch)
tree4282f0dd573344d10f69616eb05868b5cd563cc1 /arch/x86
parentcf0223503e6198292cdcc864e01eeb5fe7490752 (diff)
parentb958f7a7cbdfbf59ba61de7ebb9c59b0ee3a7967 (diff)
Merge branch 'for-next' of git://git.infradead.org/users/sameo/mfd-2.6
* 'for-next' of git://git.infradead.org/users/sameo/mfd-2.6: (80 commits) mfd: Fix missing abx500 header file updates mfd: Add missing <linux/io.h> include to intel_msic x86, mrst: add platform support for MSIC MFD driver mfd: Expose TurnOnStatus in ab8500 sysfs mfd: Remove support for early drop ab8500 chip mfd: Add support for ab8500 v3.3 mfd: Add ab8500 interrupt disable hook mfd: Convert db8500-prcmu panic() into pr_crit() mfd: Refactor db8500-prcmu request_clock() function mfd: Rename db8500-prcmu init function mfd: Fix db5500-prcmu defines mfd: db8500-prcmu voltage domain consumers additions mfd: db8500-prcmu reset code retrieval mfd: db8500-prcmu tweak for modem wakeup mfd: Add db8500-pcmu watchdog accessor functions for watchdog mfd: hwacc power state db8500-prcmu accessor mfd: Add db8500-prcmu accessors for PLL and SGA clock mfd: Move to the new db500 PRCMU API mfd: Create a common interface for dbx500 PRCMU drivers mfd: Initialize DB8500 PRCMU regs ... Fix up trivial conflicts in arch/arm/mach-imx/mach-mx31moboard.c arch/arm/mach-omap2/board-omap3beagle.c arch/arm/mach-u300/include/mach/irqs.h drivers/mfd/wm831x-spi.c
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/include/asm/intel_scu_ipc.h22
-rw-r--r--arch/x86/platform/mrst/mrst.c176
2 files changed, 183 insertions, 15 deletions
diff --git a/arch/x86/include/asm/intel_scu_ipc.h b/arch/x86/include/asm/intel_scu_ipc.h
index 29f66793cc5..4420993acc4 100644
--- a/arch/x86/include/asm/intel_scu_ipc.h
+++ b/arch/x86/include/asm/intel_scu_ipc.h
@@ -1,6 +1,8 @@
#ifndef _ASM_X86_INTEL_SCU_IPC_H_
#define _ASM_X86_INTEL_SCU_IPC_H_
+#include <linux/notifier.h>
+
#define IPCMSG_VRTC 0xFA /* Set vRTC device */
/* Command id associated with message IPCMSG_VRTC */
@@ -44,4 +46,24 @@ int intel_scu_ipc_i2c_cntrl(u32 addr, u32 *data);
/* Update FW version */
int intel_scu_ipc_fw_update(u8 *buffer, u32 length);
+extern struct blocking_notifier_head intel_scu_notifier;
+
+static inline void intel_scu_notifier_add(struct notifier_block *nb)
+{
+ blocking_notifier_chain_register(&intel_scu_notifier, nb);
+}
+
+static inline void intel_scu_notifier_remove(struct notifier_block *nb)
+{
+ blocking_notifier_chain_unregister(&intel_scu_notifier, nb);
+}
+
+static inline int intel_scu_notifier_post(unsigned long v, void *p)
+{
+ return blocking_notifier_call_chain(&intel_scu_notifier, v, p);
+}
+
+#define SCU_AVAILABLE 1
+#define SCU_DOWN 2
+
#endif
diff --git a/arch/x86/platform/mrst/mrst.c b/arch/x86/platform/mrst/mrst.c
index e6379526675..6ed7afdaf4a 100644
--- a/arch/x86/platform/mrst/mrst.c
+++ b/arch/x86/platform/mrst/mrst.c
@@ -26,6 +26,8 @@
#include <linux/platform_device.h>
#include <linux/irq.h>
#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/mfd/intel_msic.h>
#include <asm/setup.h>
#include <asm/mpspec_def.h>
@@ -483,6 +485,128 @@ static void __init *no_platform_data(void *info)
return NULL;
}
+static struct resource msic_resources[] = {
+ {
+ .start = INTEL_MSIC_IRQ_PHYS_BASE,
+ .end = INTEL_MSIC_IRQ_PHYS_BASE + 64 - 1,
+ .flags = IORESOURCE_MEM,
+ },
+};
+
+static struct intel_msic_platform_data msic_pdata;
+
+static struct platform_device msic_device = {
+ .name = "intel_msic",
+ .id = -1,
+ .dev = {
+ .platform_data = &msic_pdata,
+ },
+ .num_resources = ARRAY_SIZE(msic_resources),
+ .resource = msic_resources,
+};
+
+static inline bool mrst_has_msic(void)
+{
+ return mrst_identify_cpu() == MRST_CPU_CHIP_PENWELL;
+}
+
+static int msic_scu_status_change(struct notifier_block *nb,
+ unsigned long code, void *data)
+{
+ if (code == SCU_DOWN) {
+ platform_device_unregister(&msic_device);
+ return 0;
+ }
+
+ return platform_device_register(&msic_device);
+}
+
+static int __init msic_init(void)
+{
+ static struct notifier_block msic_scu_notifier = {
+ .notifier_call = msic_scu_status_change,
+ };
+
+ /*
+ * We need to be sure that the SCU IPC is ready before MSIC device
+ * can be registered.
+ */
+ if (mrst_has_msic())
+ intel_scu_notifier_add(&msic_scu_notifier);
+
+ return 0;
+}
+arch_initcall(msic_init);
+
+/*
+ * msic_generic_platform_data - sets generic platform data for the block
+ * @info: pointer to the SFI device table entry for this block
+ * @block: MSIC block
+ *
+ * Function sets IRQ number from the SFI table entry for given device to
+ * the MSIC platform data.
+ */
+static void *msic_generic_platform_data(void *info, enum intel_msic_block block)
+{
+ struct sfi_device_table_entry *entry = info;
+
+ BUG_ON(block < 0 || block >= INTEL_MSIC_BLOCK_LAST);
+ msic_pdata.irq[block] = entry->irq;
+
+ return no_platform_data(info);
+}
+
+static void *msic_battery_platform_data(void *info)
+{
+ return msic_generic_platform_data(info, INTEL_MSIC_BLOCK_BATTERY);
+}
+
+static void *msic_gpio_platform_data(void *info)
+{
+ static struct intel_msic_gpio_pdata pdata;
+ int gpio = get_gpio_by_name("msic_gpio_base");
+
+ if (gpio < 0)
+ return NULL;
+
+ pdata.gpio_base = gpio;
+ msic_pdata.gpio = &pdata;
+
+ return msic_generic_platform_data(info, INTEL_MSIC_BLOCK_GPIO);
+}
+
+static void *msic_audio_platform_data(void *info)
+{
+ struct platform_device *pdev;
+
+ pdev = platform_device_register_simple("sst-platform", -1, NULL, 0);
+ if (IS_ERR(pdev)) {
+ pr_err("failed to create audio platform device\n");
+ return NULL;
+ }
+
+ return msic_generic_platform_data(info, INTEL_MSIC_BLOCK_AUDIO);
+}
+
+static void *msic_power_btn_platform_data(void *info)
+{
+ return msic_generic_platform_data(info, INTEL_MSIC_BLOCK_POWER_BTN);
+}
+
+static void *msic_ocd_platform_data(void *info)
+{
+ static struct intel_msic_ocd_pdata pdata;
+ int gpio = get_gpio_by_name("ocd_gpio");
+
+ if (gpio < 0)
+ return NULL;
+
+ pdata.gpio = gpio;
+ msic_pdata.ocd = &pdata;
+
+ return msic_generic_platform_data(info, INTEL_MSIC_BLOCK_OCD);
+}
+
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},
@@ -491,7 +615,14 @@ static const struct devs_id __initconst device_ids[] = {
{"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},
+
+ /* MSIC subdevices */
+ {"msic_battery", SFI_DEV_TYPE_IPC, 1, &msic_battery_platform_data},
+ {"msic_gpio", SFI_DEV_TYPE_IPC, 1, &msic_gpio_platform_data},
+ {"msic_audio", SFI_DEV_TYPE_IPC, 1, &msic_audio_platform_data},
+ {"msic_power_btn", SFI_DEV_TYPE_IPC, 1, &msic_power_btn_platform_data},
+ {"msic_ocd", SFI_DEV_TYPE_IPC, 1, &msic_ocd_platform_data},
+
{},
};
@@ -558,6 +689,9 @@ static void __init intel_scu_i2c_device_register(int bus,
i2c_devs[i2c_next_dev++] = new_dev;
}
+BLOCKING_NOTIFIER_HEAD(intel_scu_notifier);
+EXPORT_SYMBOL_GPL(intel_scu_notifier);
+
/* Called by IPC driver */
void intel_scu_devices_create(void)
{
@@ -582,6 +716,7 @@ void intel_scu_devices_create(void)
} else
i2c_register_board_info(i2c_bus[i], i2c_devs[i], 1);
}
+ intel_scu_notifier_post(SCU_AVAILABLE, 0L);
}
EXPORT_SYMBOL_GPL(intel_scu_devices_create);
@@ -590,6 +725,8 @@ void intel_scu_devices_destroy(void)
{
int i;
+ intel_scu_notifier_post(SCU_DOWN, 0L);
+
for (i = 0; i < ipc_next_dev; i++)
platform_device_del(ipc_devs[i]);
}
@@ -606,19 +743,37 @@ static void __init install_irq_resource(struct platform_device *pdev, int irq)
platform_device_add_resources(pdev, &res, 1);
}
-static void __init sfi_handle_ipc_dev(struct platform_device *pdev)
+static void __init sfi_handle_ipc_dev(struct sfi_device_table_entry *entry)
{
const struct devs_id *dev = device_ids;
+ struct platform_device *pdev;
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);
+ !strncmp(dev->name, entry->name, SFI_NAME_LEN)) {
+ pdata = dev->get_platform_data(entry);
break;
}
dev++;
}
+
+ /*
+ * On Medfield the platform device creation is handled by the MSIC
+ * MFD driver so we don't need to do it here.
+ */
+ if (mrst_has_msic())
+ return;
+
+ /* ID as IRQ is a hack that will go away */
+ pdev = platform_device_alloc(entry->name, entry->irq);
+ if (pdev == NULL) {
+ pr_err("out of memory for SFI platform device '%s'.\n",
+ entry->name);
+ return;
+ }
+ install_irq_resource(pdev, entry->irq);
+
pdev->dev.platform_data = pdata;
intel_scu_device_register(pdev);
}
@@ -671,7 +826,6 @@ static int __init sfi_parse_devs(struct sfi_table_header *table)
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;
@@ -699,17 +853,9 @@ static int __init sfi_parse_devs(struct sfi_table_header *table)
switch (pentry->type) {
case SFI_DEV_TYPE_IPC:
- /* ID as IRQ is a hack that will go away */
- pdev = platform_device_alloc(pentry->name, irq);
- if (pdev == NULL) {
- pr_err("out of memory for SFI platform device '%s'.\n",
- pentry->name);
- continue;
- }
- install_irq_resource(pdev, irq);
pr_debug("info[%2d]: IPC bus, name = %16.16s, "
- "irq = 0x%2x\n", i, pentry->name, irq);
- sfi_handle_ipc_dev(pdev);
+ "irq = 0x%2x\n", i, pentry->name, pentry->irq);
+ sfi_handle_ipc_dev(pentry);
break;
case SFI_DEV_TYPE_SPI:
memset(&spi_info, 0, sizeof(spi_info));