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Date: Thu, 5 Feb 2009 17:53:36 +0100
From: Philipp Zabel <philipp.zabel@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Samuel Ortiz <sameo@...nedhand.com>,
Evgeniy Polyakov <johnpol@....mipt.ru>,
Matt Reimer <mreimer@...p.net>,
Philipp Zabel <philipp.zabel@...il.com>
Subject: [PATCH 2/6] mfd: PASIC3: convert to use MFD core
This patch makes htc-pasic3 register the DS1WM and LED cell drivers
through the MFD core infrastructure instead of allocating the platform
devices manually. It also calculates the bus_shift parameter from the
memory resource size.
Signed-off-by: Philipp Zabel <philipp.zabel@...il.com>
---
drivers/mfd/Kconfig | 1 +
drivers/mfd/htc-pasic3.c | 159 ++++++++++++++++++----------------------------
2 files changed, 62 insertions(+), 98 deletions(-)
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 06a2b0f..da2d4c5 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -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
diff --git a/drivers/mfd/htc-pasic3.c b/drivers/mfd/htc-pasic3.c
index 91b294d..92b6837 100644
--- a/drivers/mfd/htc-pasic3.c
+++ b/drivers/mfd/htc-pasic3.c
@@ -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
@@ -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;
@@ -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;
@@ -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)
{
@@ -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);
@@ -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");
}
@@ -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;
}
--
1.5.6.5
--
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