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yaml
---
r: 142007
b: refs/heads/master
c: 0254a8f
h: refs/heads/master
i:
  142005: b2a7435
  142003: 3958fee
  141999: ab9d62c
v: v3
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Philipp Zabel authored and Samuel Ortiz committed Apr 4, 2009
1 parent 461c47d commit 7c8ca3c
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Showing 3 changed files with 63 additions and 99 deletions.
2 changes: 1 addition & 1 deletion [refs]
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Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: a23a175795cdb202619ac176129b2f0c2a5c9456
refs/heads/master: 0254a8f496f9c939d4068613ace4ffd0d9e6ece2
1 change: 1 addition & 0 deletions trunk/drivers/mfd/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -52,6 +52,7 @@ config HTC_EGPIO

config HTC_PASIC3
tristate "HTC PASIC3 LED/DS1WM chip support"
select MFD_CORE
help
This core driver provides register access for the LED/DS1WM
chips labeled "AIC2" and "AIC3", found on HTC Blueangel and
Expand Down
159 changes: 61 additions & 98 deletions trunk/drivers/mfd/htc-pasic3.c
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Original file line number Diff line number Diff line change
Expand Up @@ -12,18 +12,17 @@
#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/core.h>
#include <linux/mfd/ds1wm.h>
#include <linux/mfd/htc-pasic3.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
Expand Down Expand Up @@ -65,46 +64,15 @@ 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;
}
static struct mfd_cell led_cell __initdata = {
.name = "leds-pasic3",
};

/*
* DS1WM
*/

static void ds1wm_enable(struct platform_device *pdev)
static int ds1wm_enable(struct platform_device *pdev)
{
struct device *dev = pdev->dev.parent;
int c;
Expand All @@ -113,9 +81,10 @@ static void ds1wm_enable(struct platform_device *pdev)
pasic3_write_register(dev, 0x28, c & 0x7f);

dev_dbg(dev, "DS1WM OWM_EN low (active) %02x\n", c & 0x7f);
return 0;
}

static void ds1wm_disable(struct platform_device *pdev)
static int ds1wm_disable(struct platform_device *pdev)
{
struct device *dev = pdev->dev.parent;
int c;
Expand All @@ -124,56 +93,33 @@ static void ds1wm_disable(struct platform_device *pdev)
pasic3_write_register(dev, 0x28, c | 0x80);

dev_dbg(dev, "DS1WM OWM_EN high (inactive) %02x\n", c | 0x80);
return 0;
}

static struct ds1wm_platform_data ds1wm_pdata = {
.bus_shift = 2,
.enable = ds1wm_enable,
.disable = ds1wm_disable,
static struct ds1wm_driver_data ds1wm_pdata = {
.active_high = 0,
};

static int ds1wm_device_add(struct platform_device *pasic3_pdev, int bus_shift)
{
struct device *pasic3_dev = &pasic3_pdev->dev;
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, pasic3_pdev->resource,
pasic3_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;
static struct resource ds1wm_resources[] __initdata = {
[0] = {
.start = 0,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = 0,
.end = 0,
.flags = IORESOURCE_IRQ,
},
};

exit_pdev_put:
platform_device_put(pdev);
return ret;
}
static struct mfd_cell ds1wm_cell __initdata = {
.name = "ds1wm",
.enable = ds1wm_enable,
.disable = ds1wm_disable,
.driver_data = &ds1wm_pdata,
.num_resources = 2,
.resources = ds1wm_resources,
};

static int __init pasic3_probe(struct platform_device *pdev)
{
Expand All @@ -182,12 +128,27 @@ static int __init pasic3_probe(struct platform_device *pdev)
struct pasic3_data *asic;
struct resource *r;
int ret;
int irq = 0;

r = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (r) {
ds1wm_resources[1].flags = IORESOURCE_IRQ | (r->flags &
(IORESOURCE_IRQ_HIGHEDGE | IORESOURCE_IRQ_LOWEDGE));
irq = r->start;
}

r = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (r) {
ds1wm_resources[1].flags = IORESOURCE_IRQ | (r->flags &
(IORESOURCE_IRQ_HIGHEDGE | IORESOURCE_IRQ_LOWEDGE));
irq = r->start;
}

r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!r)
return -ENXIO;

if (!request_mem_region(r->start, r->end - r->start + 1, "pasic3"))
if (!request_mem_region(r->start, resource_size(r), "pasic3"))
return -EBUSY;

asic = kzalloc(sizeof(struct pasic3_data), GFP_KERNEL);
Expand All @@ -196,24 +157,29 @@ static int __init pasic3_probe(struct platform_device *pdev)

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);
asic->mapping = ioremap(r->start, resource_size(r));
if (!asic->mapping) {
dev_err(dev, "couldn't ioremap PASIC3\n");
kfree(asic);
return -ENOMEM;
}

ret = ds1wm_device_add(pdev, asic->bus_shift);
/* calculate bus shift from mem resource */
asic->bus_shift = (resource_size(r) - 5) >> 3;

/* the first 5 PASIC3 registers control the DS1WM */
ds1wm_resources[0].end = (5 << asic->bus_shift) - 1;
ds1wm_cell.platform_data = &ds1wm_cell;
ds1wm_cell.data_size = sizeof(ds1wm_cell);
ret = mfd_add_devices(&pdev->dev, pdev->id, &ds1wm_cell, 1, r, irq);
if (ret < 0)
dev_warn(dev, "failed to register DS1WM\n");

if (pdata->led_pdata) {
ret = led_device_add(dev, pdata->led_pdata);
led_cell.driver_data = pdata->led_pdata;
led_cell.platform_data = &led_cell;
led_cell.data_size = sizeof(ds1wm_cell);
ret = mfd_add_devices(&pdev->dev, pdev->id, &led_cell, 1, r, 0);
if (ret < 0)
dev_warn(dev, "failed to register LED device\n");
}
Expand All @@ -226,14 +192,11 @@ 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);
mfd_remove_devices(&pdev->dev);

iounmap(asic->mapping);
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(r->start, r->end - r->start + 1);
release_mem_region(r->start, resource_size(r));
kfree(asic);
return 0;
}
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