aboutsummaryrefslogtreecommitdiff
path: root/drivers/mfd
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2008-04-21 15:40:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-21 15:40:55 -0700
commit85b375a613085b78531ec86369a51c2f3b922f95 (patch)
tree716437d598de92bbd7acaf24622e9a7d74fc209a /drivers/mfd
parentec965350bb98bd291eb34f6ecddfdcfc36da1e6e (diff)
parentcf816ecb533ab96b883dfdc0db174598b5b5c4d2 (diff)
Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (212 commits) [ARM] pxa: Phycore pcm-990-specific code for the PXA270 Quick Capture driver [ARM] pxa: V4L2 soc_camera driver for PXA270 [ARM] pxa: restrict availability of pxa2xx PCMCIA drivers [ARM] 5005/1: BAST: Fix kset_name initialiser [ARM] 4967/1: Adds functions to set clkout rate for Samsung S3C2410 [ARM] 4988/1: Add GPIO lib support to the EP93xx [ARM] Add initial sparsemem support [ARM] pxa: initialise PXA devices before platform init code [ARM] 5002/1: tosa: add two more leds [ARM] 5004/1: Tosa: make several unreferenced structures static. [ARM] 5003/1: Shut up sparse warnings [ARM] 4977/2: soc - pxa2xx-ac97 - Add missing clk_enable() [ARM] 4976/1: zylonite: Configure GPIO for WM9713 IRQ line [ARM] 4974/1: Drop unused leds-tosa. [ARM] 4973/1: Tosa: use leds-gpio driver. [ARM] 4972/1: Tosa: convert scoop GPIOs usage to generic gpio code [ARM] 4971/1: pxaficp_ir: provide startup and shutdown hooks [ARM] pxa: lubbock: move mis-placed SPI info [ARM] 4970/1: tosa: correct gpio used for wake up. [ARM] 4966/1: magician: add MFP pin configuration ...
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/Kconfig16
-rw-r--r--drivers/mfd/Makefile3
-rw-r--r--drivers/mfd/htc-egpio.c440
-rw-r--r--drivers/mfd/htc-pasic3.c265
4 files changed, 724 insertions, 0 deletions
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 0c886c88238..2566479937c 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -22,6 +22,22 @@ config MFD_ASIC3
This driver supports the ASIC3 multifunction chip found on many
PDAs (mainly iPAQ and HTC based ones)
+config HTC_EGPIO
+ bool "HTC EGPIO support"
+ depends on GENERIC_HARDIRQS && HAVE_GPIO_LIB
+ help
+ This driver supports the CPLD egpio chip present on
+ several HTC phones. It provides basic support for input
+ pins, output pins, and irqs.
+
+config HTC_PASIC3
+ tristate "HTC PASIC3 LED/DS1WM chip support"
+ help
+ This core driver provides register access for the LED/DS1WM
+ chips labeled "AIC2" and "AIC3", found on HTC Blueangel and
+ HTC Magician devices, respectively. Actual functionality is
+ handled by the leds-pasic3 and ds1wm drivers.
+
endmenu
menu "Multimedia Capabilities Port drivers"
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 521cd5cb68a..eef4e26807d 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -5,6 +5,9 @@
obj-$(CONFIG_MFD_SM501) += sm501.o
obj-$(CONFIG_MFD_ASIC3) += asic3.o
+obj-$(CONFIG_HTC_EGPIO) += htc-egpio.o
+obj-$(CONFIG_HTC_PASIC3) += htc-pasic3.o
+
obj-$(CONFIG_MCP) += mcp-core.o
obj-$(CONFIG_MCP_SA11X0) += mcp-sa11x0.o
obj-$(CONFIG_MCP_UCB1200) += ucb1x00-core.o
diff --git a/drivers/mfd/htc-egpio.c b/drivers/mfd/htc-egpio.c
new file mode 100644
index 00000000000..8872cc07751
--- /dev/null
+++ b/drivers/mfd/htc-egpio.c
@@ -0,0 +1,440 @@
+/*
+ * Support for the GPIO/IRQ expander chips present on several HTC phones.
+ * These are implemented in CPLD chips present on the board.
+ *
+ * Copyright (c) 2007 Kevin O'Connor <kevin@koconnor.net>
+ * Copyright (c) 2007 Philipp Zabel <philipp.zabel@gmail.com>
+ *
+ * This file may be distributed under the terms of the GNU GPL license.
+ */
+
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/spinlock.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/mfd/htc-egpio.h>
+
+struct egpio_chip {
+ int reg_start;
+ int cached_values;
+ unsigned long is_out;
+ struct device *dev;
+ struct gpio_chip chip;
+};
+
+struct egpio_info {
+ spinlock_t lock;
+
+ /* iomem info */
+ void __iomem *base_addr;
+ int bus_shift; /* byte shift */
+ int reg_shift; /* bit shift */
+ int reg_mask;
+
+ /* irq info */
+ int ack_register;
+ int ack_write;
+ u16 irqs_enabled;
+ uint irq_start;
+ int nirqs;
+ uint chained_irq;
+
+ /* egpio info */
+ struct egpio_chip *chip;
+ int nchips;
+};
+
+static inline void egpio_writew(u16 value, struct egpio_info *ei, int reg)
+{
+ writew(value, ei->base_addr + (reg << ei->bus_shift));
+}
+
+static inline u16 egpio_readw(struct egpio_info *ei, int reg)
+{
+ return readw(ei->base_addr + (reg << ei->bus_shift));
+}
+
+/*
+ * IRQs
+ */
+
+static inline void ack_irqs(struct egpio_info *ei)
+{
+ egpio_writew(ei->ack_write, ei, ei->ack_register);
+ pr_debug("EGPIO ack - write %x to base+%x\n",
+ ei->ack_write, ei->ack_register << ei->bus_shift);
+}
+
+static void egpio_ack(unsigned int irq)
+{
+}
+
+/* There does not appear to be a way to proactively mask interrupts
+ * on the egpio chip itself. So, we simply ignore interrupts that
+ * aren't desired. */
+static void egpio_mask(unsigned int irq)
+{
+ struct egpio_info *ei = get_irq_chip_data(irq);
+ ei->irqs_enabled &= ~(1 << (irq - ei->irq_start));
+ pr_debug("EGPIO mask %d %04x\n", irq, ei->irqs_enabled);
+}
+static void egpio_unmask(unsigned int irq)
+{
+ struct egpio_info *ei = get_irq_chip_data(irq);
+ ei->irqs_enabled |= 1 << (irq - ei->irq_start);
+ pr_debug("EGPIO unmask %d %04x\n", irq, ei->irqs_enabled);
+}
+
+static struct irq_chip egpio_muxed_chip = {
+ .name = "htc-egpio",
+ .ack = egpio_ack,
+ .mask = egpio_mask,
+ .unmask = egpio_unmask,
+};
+
+static void egpio_handler(unsigned int irq, struct irq_desc *desc)
+{
+ struct egpio_info *ei = get_irq_data(irq);
+ int irqpin;
+
+ /* Read current pins. */
+ unsigned long readval = egpio_readw(ei, ei->ack_register);
+ pr_debug("IRQ reg: %x\n", (unsigned int)readval);
+ /* Ack/unmask interrupts. */
+ ack_irqs(ei);
+ /* Process all set pins. */
+ readval &= ei->irqs_enabled;
+ for_each_bit(irqpin, &readval, ei->nirqs) {
+ /* Run irq handler */
+ pr_debug("got IRQ %d\n", irqpin);
+ irq = ei->irq_start + irqpin;
+ desc = &irq_desc[irq];
+ desc->handle_irq(irq, desc);
+ }
+}
+
+int htc_egpio_get_wakeup_irq(struct device *dev)
+{
+ struct egpio_info *ei = dev_get_drvdata(dev);
+
+ /* Read current pins. */
+ u16 readval = egpio_readw(ei, ei->ack_register);
+ /* Ack/unmask interrupts. */
+ ack_irqs(ei);
+ /* Return first set pin. */
+ readval &= ei->irqs_enabled;
+ return ei->irq_start + ffs(readval) - 1;
+}
+EXPORT_SYMBOL(htc_egpio_get_wakeup_irq);
+
+static inline int egpio_pos(struct egpio_info *ei, int bit)
+{
+ return bit >> ei->reg_shift;
+}
+
+static inline int egpio_bit(struct egpio_info *ei, int bit)
+{
+ return 1 << (bit & ((1 << ei->reg_shift)-1));
+}
+
+/*
+ * Input pins
+ */
+
+static int egpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ struct egpio_chip *egpio;
+ struct egpio_info *ei;
+ unsigned bit;
+ int reg;
+ int value;
+
+ pr_debug("egpio_get_value(%d)\n", chip->base + offset);
+
+ egpio = container_of(chip, struct egpio_chip, chip);
+ ei = dev_get_drvdata(egpio->dev);
+ bit = egpio_bit(ei, offset);
+ reg = egpio->reg_start + egpio_pos(ei, offset);
+
+ value = egpio_readw(ei, reg);
+ pr_debug("readw(%p + %x) = %x\n",
+ ei->base_addr, reg << ei->bus_shift, value);
+ return value & bit;
+}
+
+static int egpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+ struct egpio_chip *egpio;
+
+ egpio = container_of(chip, struct egpio_chip, chip);
+ return test_bit(offset, &egpio->is_out) ? -EINVAL : 0;
+}
+
+
+/*
+ * Output pins
+ */
+
+static void egpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+ unsigned long flag;
+ struct egpio_chip *egpio;
+ struct egpio_info *ei;
+ unsigned bit;
+ int pos;
+ int reg;
+ int shift;
+
+ pr_debug("egpio_set(%s, %d(%d), %d)\n",
+ chip->label, offset, offset+chip->base, value);
+
+ egpio = container_of(chip, struct egpio_chip, chip);
+ ei = dev_get_drvdata(egpio->dev);
+ bit = egpio_bit(ei, offset);
+ pos = egpio_pos(ei, offset);
+ reg = egpio->reg_start + pos;
+ shift = pos << ei->reg_shift;
+
+ pr_debug("egpio %s: reg %d = 0x%04x\n", value ? "set" : "clear",
+ reg, (egpio->cached_values >> shift) & ei->reg_mask);
+
+ spin_lock_irqsave(&ei->lock, flag);
+ if (value)
+ egpio->cached_values |= (1 << offset);
+ else
+ egpio->cached_values &= ~(1 << offset);
+ egpio_writew((egpio->cached_values >> shift) & ei->reg_mask, ei, reg);
+ spin_unlock_irqrestore(&ei->lock, flag);
+}
+
+static int egpio_direction_output(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ struct egpio_chip *egpio;
+
+ egpio = container_of(chip, struct egpio_chip, chip);
+ if (test_bit(offset, &egpio->is_out)) {
+ egpio_set(chip, offset, value);
+ return 0;
+ } else {
+ return -EINVAL;
+ }
+}
+
+static void egpio_write_cache(struct egpio_info *ei)
+{
+ int i;
+ struct egpio_chip *egpio;
+ int shift;
+
+ for (i = 0; i < ei->nchips; i++) {
+ egpio = &(ei->chip[i]);
+ if (!egpio->is_out)
+ continue;
+
+ for (shift = 0; shift < egpio->chip.ngpio;
+ shift += (1<<ei->reg_shift)) {
+
+ int reg = egpio->reg_start + egpio_pos(ei, shift);
+
+ if (!((egpio->is_out >> shift) & ei->reg_mask))
+ continue;
+
+ pr_debug("EGPIO: setting %x to %x, was %x\n", reg,
+ (egpio->cached_values >> shift) & ei->reg_mask,
+ egpio_readw(ei, reg));
+
+ egpio_writew((egpio->cached_values >> shift)
+ & ei->reg_mask, ei, reg);
+ }
+ }
+}
+
+
+/*
+ * Setup
+ */
+
+static int __init egpio_probe(struct platform_device *pdev)
+{
+ struct htc_egpio_platform_data *pdata = pdev->dev.platform_data;
+ struct resource *res;
+ struct egpio_info *ei;
+ struct gpio_chip *chip;
+ unsigned int irq, irq_end;
+ int i;
+ int ret;
+
+ /* Initialize ei data structure. */
+ ei = kzalloc(sizeof(*ei), GFP_KERNEL);
+ if (!ei)
+ return -ENOMEM;
+
+ spin_lock_init(&ei->lock);
+
+ /* Find chained irq */
+ ret = -EINVAL;
+ res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (res)
+ ei->chained_irq = res->start;
+
+ /* Map egpio chip into virtual address space. */
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
+ goto fail;
+ ei->base_addr = ioremap_nocache(res->start, res->end - res->start);
+ if (!ei->base_addr)
+ goto fail;
+ pr_debug("EGPIO phys=%08x virt=%p\n", res->start, ei->base_addr);
+
+ if ((pdata->bus_width != 16) && (pdata->bus_width != 32))
+ goto fail;
+ ei->bus_shift = fls(pdata->bus_width - 1) - 3;
+ pr_debug("bus_shift = %d\n", ei->bus_shift);
+
+ if ((pdata->reg_width != 8) && (pdata->reg_width != 16))
+ goto fail;
+ ei->reg_shift = fls(pdata->reg_width - 1);
+ pr_debug("reg_shift = %d\n", ei->reg_shift);
+
+ ei->reg_mask = (1 << pdata->reg_width) - 1;
+
+ platform_set_drvdata(pdev, ei);
+
+ ei->nchips = pdata->num_chips;
+ ei->chip = kzalloc(sizeof(struct egpio_chip) * ei->nchips, GFP_KERNEL);
+ if (!ei) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+ for (i = 0; i < ei->nchips; i++) {
+ ei->chip[i].reg_start = pdata->chip[i].reg_start;
+ ei->chip[i].cached_values = pdata->chip[i].initial_values;
+ ei->chip[i].is_out = pdata->chip[i].direction;
+ ei->chip[i].dev = &(pdev->dev);
+ chip = &(ei->chip[i].chip);
+ chip->label = "htc-egpio";
+ chip->get = egpio_get;
+ chip->set = egpio_set;
+ chip->direction_input = egpio_direction_input;
+ chip->direction_output = egpio_direction_output;
+ chip->base = pdata->chip[i].gpio_base;
+ chip->ngpio = pdata->chip[i].num_gpios;
+
+ gpiochip_add(chip);
+ }
+
+ /* Set initial pin values */
+ egpio_write_cache(ei);
+
+ ei->irq_start = pdata->irq_base;
+ ei->nirqs = pdata->num_irqs;
+ ei->ack_register = pdata->ack_register;
+
+ if (ei->chained_irq) {
+ /* Setup irq handlers */
+ ei->ack_write = 0xFFFF;
+ if (pdata->invert_acks)
+ ei->ack_write = 0;
+ irq_end = ei->irq_start + ei->nirqs;
+ for (irq = ei->irq_start; irq < irq_end; irq++) {
+ set_irq_chip(irq, &egpio_muxed_chip);
+ set_irq_chip_data(irq, ei);
+ set_irq_handler(irq, handle_simple_irq);
+ set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+ }
+ set_irq_type(ei->chained_irq, IRQ_TYPE_EDGE_RISING);
+ set_irq_data(ei->chained_irq, ei);
+ set_irq_chained_handler(ei->chained_irq, egpio_handler);
+ ack_irqs(ei);
+
+ device_init_wakeup(&pdev->dev, 1);
+ }
+
+ return 0;
+
+fail:
+ printk(KERN_ERR "EGPIO failed to setup\n");
+ kfree(ei);
+ return ret;
+}
+
+static int __exit egpio_remove(struct platform_device *pdev)
+{
+ struct egpio_info *ei = platform_get_drvdata(pdev);
+ unsigned int irq, irq_end;
+
+ if (ei->chained_irq) {
+ irq_end = ei->irq_start + ei->nirqs;
+ for (irq = ei->irq_start; irq < irq_end; irq++) {
+ set_irq_chip(irq, NULL);
+ set_irq_handler(irq, NULL);
+ set_irq_flags(irq, 0);
+ }
+ set_irq_chained_handler(ei->chained_irq, NULL);
+ device_init_wakeup(&pdev->dev, 0);
+ }
+ iounmap(ei->base_addr);
+ kfree(ei->chip);
+ kfree(ei);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int egpio_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ struct egpio_info *ei = platform_get_drvdata(pdev);
+
+ if (ei->chained_irq && device_may_wakeup(&pdev->dev))
+ enable_irq_wake(ei->chained_irq);
+ return 0;
+}
+
+static int egpio_resume(struct platform_device *pdev)
+{
+ struct egpio_info *ei = platform_get_drvdata(pdev);
+
+ if (ei->chained_irq && device_may_wakeup(&pdev->dev))
+ disable_irq_wake(ei->chained_irq);
+
+ /* Update registers from the cache, in case
+ the CPLD was powered off during suspend */
+ egpio_write_cache(ei);
+ return 0;
+}
+#else
+#define egpio_suspend NULL
+#define egpio_resume NULL
+#endif
+
+
+static struct platform_driver egpio_driver = {
+ .driver = {
+ .name = "htc-egpio",
+ },
+ .remove = __exit_p(egpio_remove),
+ .suspend = egpio_suspend,
+ .resume = egpio_resume,
+};
+
+static int __init egpio_init(void)
+{
+ return platform_driver_probe(&egpio_driver, egpio_probe);
+}
+
+static void __exit egpio_exit(void)
+{
+ platform_driver_unregister(&egpio_driver);
+}
+
+/* start early for dependencies */
+subsys_initcall(egpio_init);
+module_exit(egpio_exit)
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Kevin O'Connor <kevin@koconnor.net>");
diff --git a/drivers/mfd/htc-pasic3.c b/drivers/mfd/htc-pasic3.c
new file mode 100644
index 00000000000..af66f4f2830
--- /dev/null
+++ b/drivers/mfd/htc-pasic3.c
@@ -0,0 +1,265 @@
+/*
+ * Core driver for HTC PASIC3 LED/DS1WM chip.
+ *
+ * Copyright (C) 2006 Philipp Zabel <philipp.zabel@gmail.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.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+#include <linux/ds1wm.h>
+#include <linux/gpio.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/htc-pasic3.h>
+
+#include <asm/arch/pxa-regs.h>
+
+struct pasic3_data {
+ void __iomem *mapping;
+ unsigned int bus_shift;
+ struct platform_device *ds1wm_pdev;
+ struct platform_device *led_pdev;
+};
+
+#define REG_ADDR 5
+#define REG_DATA 6
+#define NUM_REGS 7
+
+#define READ_MODE 0x80
+
+/*
+ * write to a secondary register on the PASIC3
+ */
+void pasic3_write_register(struct device *dev, u32 reg, u8 val)
+{
+ struct pasic3_data *asic = dev->driver_data;
+ int bus_shift = asic->bus_shift;
+ void __iomem *addr = asic->mapping + (REG_ADDR << bus_shift);
+ void __iomem *data = asic->mapping + (REG_DATA << bus_shift);
+
+ __raw_writeb(~READ_MODE & reg, addr);
+ __raw_writeb(val, data);
+}
+EXPORT_SYMBOL(pasic3_write_register); /* for leds-pasic3 */
+
+/*
+ * read from a secondary register on the PASIC3
+ */
+u8 pasic3_read_register(struct device *dev, u32 reg)
+{
+ struct pasic3_data *asic = dev->driver_data;
+ int bus_shift = asic->bus_shift;
+ void __iomem *addr = asic->mapping + (REG_ADDR << bus_shift);
+ void __iomem *data = asic->mapping + (REG_DATA << bus_shift);
+
+ __raw_writeb(READ_MODE | reg, addr);
+ return __raw_readb(data);
+}
+EXPORT_SYMBOL(pasic3_read_register); /* for leds-pasic3 */
+
+/*
+ * LEDs
+ */
+
+static int led_device_add(struct device *pasic3_dev,
+ const struct pasic3_leds_machinfo *pdata)
+{
+ struct pasic3_data *asic = pasic3_dev->driver_data;
+ struct platform_device *pdev;
+ int ret;
+
+ pdev = platform_device_alloc("pasic3-led", -1);
+ if (!pdev) {
+ dev_dbg(pasic3_dev, "failed to allocate LED platform device\n");
+ return -ENOMEM;
+ }
+
+ ret = platform_device_add_data(pdev, pdata,
+ sizeof(struct pasic3_leds_machinfo));
+ if (ret < 0) {
+ dev_dbg(pasic3_dev, "failed to add LED platform data\n");
+ goto exit_pdev_put;
+ }
+
+ pdev->dev.parent = pasic3_dev;
+ ret = platform_device_add(pdev);
+ if (ret < 0) {
+ dev_dbg(pasic3_dev, "failed to add LED platform device\n");
+ goto exit_pdev_put;
+ }
+
+ asic->led_pdev = pdev;
+ return 0;
+
+exit_pdev_put:
+ platform_device_put(pdev);
+ return ret;
+}
+
+/*
+ * DS1WM
+ */
+
+static void ds1wm_enable(struct platform_device *pdev)
+{
+ struct device *dev = pdev->dev.parent;
+ int c;
+
+ c = pasic3_read_register(dev, 0x28);
+ pasic3_write_register(dev, 0x28, c & 0x7f);
+
+ dev_dbg(dev, "DS1WM OWM_EN low (active) %02x\n", c & 0x7f);
+}
+
+static void ds1wm_disable(struct platform_device *pdev)
+{
+ struct device *dev = pdev->dev.parent;
+ int c;
+
+ c = pasic3_read_register(dev, 0x28);
+ pasic3_write_register(dev, 0x28, c | 0x80);
+
+ dev_dbg(dev, "DS1WM OWM_EN high (inactive) %02x\n", c | 0x80);
+}
+
+static struct ds1wm_platform_data ds1wm_pdata = {
+ .bus_shift = 2,
+ .enable = ds1wm_enable,
+ .disable = ds1wm_disable,
+};
+
+static int ds1wm_device_add(struct device *pasic3_dev, int bus_shift)
+{
+ struct pasic3_data *asic = pasic3_dev->driver_data;
+ struct platform_device *pdev;
+ int ret;
+
+ pdev = platform_device_alloc("ds1wm", -1);
+ if (!pdev) {
+ dev_dbg(pasic3_dev, "failed to allocate DS1WM platform device\n");
+ return -ENOMEM;
+ }
+
+ ret = platform_device_add_resources(pdev, pdev->resource,
+ pdev->num_resources);
+ if (ret < 0) {
+ dev_dbg(pasic3_dev, "failed to add DS1WM resources\n");
+ goto exit_pdev_put;
+ }
+
+ ds1wm_pdata.bus_shift = asic->bus_shift;
+ ret = platform_device_add_data(pdev, &ds1wm_pdata,
+ sizeof(struct ds1wm_platform_data));
+ if (ret < 0) {
+ dev_dbg(pasic3_dev, "failed to add DS1WM platform data\n");
+ goto exit_pdev_put;
+ }
+
+ pdev->dev.parent = pasic3_dev;
+ ret = platform_device_add(pdev);
+ if (ret < 0) {
+ dev_dbg(pasic3_dev, "failed to add DS1WM platform device\n");
+ goto exit_pdev_put;
+ }
+
+ asic->ds1wm_pdev = pdev;
+ return 0;
+
+exit_pdev_put:
+ platform_device_put(pdev);
+ return ret;
+}
+
+static int __init pasic3_probe(struct platform_device *pdev)
+{
+ struct pasic3_platform_data *pdata = pdev->dev.platform_data;
+ struct device *dev = &pdev->dev;
+ struct pasic3_data *asic;
+ struct resource *r;
+ int ret;
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!r)
+ return -ENXIO;
+
+ if (!request_mem_region(r->start, r->end - r->start + 1, "pasic3"))
+ return -EBUSY;
+
+ asic = kzalloc(sizeof(struct pasic3_data), GFP_KERNEL);
+ if (!asic)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, asic);
+
+ if (pdata && pdata->bus_shift)
+ asic->bus_shift = pdata->bus_shift;
+ else
+ asic->bus_shift = 2;
+
+ asic->mapping = ioremap(r->start, r->end - r->start + 1);
+ if (!asic->mapping) {
+ dev_err(dev, "couldn't ioremap PASIC3\n");
+ kfree(asic);
+ return -ENOMEM;
+ }
+
+ ret = ds1wm_device_add(dev, asic->bus_shift);
+ if (ret < 0)
+ dev_warn(dev, "failed to register DS1WM\n");
+
+ if (pdata->led_pdata) {
+ ret = led_device_add(dev, pdata->led_pdata);
+ if (ret < 0)
+ dev_warn(dev, "failed to register LED device\n");
+ }
+
+ return 0;
+}
+
+static int pasic3_remove(struct platform_device *pdev)
+{
+ struct pasic3_data *asic = platform_get_drvdata(pdev);
+ struct resource *r;
+
+ if (asic->led_pdev)
+ platform_device_unregister(asic->led_pdev);
+ if (asic->ds1wm_pdev)
+ platform_device_unregister(asic->ds1wm_pdev);
+
+ iounmap(asic->mapping);
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ release_mem_region(r->start, r->end - r->start + 1);
+ kfree(asic);
+ return 0;
+}
+
+static struct platform_driver pasic3_driver = {
+ .driver = {
+ .name = "pasic3",
+ },
+ .remove = pasic3_remove,
+};
+
+static int __init pasic3_base_init(void)
+{
+ return platform_driver_probe(&pasic3_driver, pasic3_probe);
+}
+
+static void __exit pasic3_base_exit(void)
+{
+ platform_driver_unregister(&pasic3_driver);
+}
+
+module_init(pasic3_base_init);
+module_exit(pasic3_base_exit);
+
+MODULE_AUTHOR("Philipp Zabel <philipp.zabel@gmail.com>");
+MODULE_DESCRIPTION("Core driver for HTC PASIC3");
+MODULE_LICENSE("GPL");