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path: root/drivers/mfd/htc-pasic3.c
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Diffstat (limited to 'drivers/mfd/htc-pasic3.c')
-rw-r--r--drivers/mfd/htc-pasic3.c186
1 files changed, 67 insertions, 119 deletions
diff --git a/drivers/mfd/htc-pasic3.c b/drivers/mfd/htc-pasic3.c
index 91b294dcc13..e88d4f6fef4 100644
--- a/drivers/mfd/htc-pasic3.c
+++ b/drivers/mfd/htc-pasic3.c
@@ -12,18 +12,18 @@
#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>
+#include <linux/slab.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
@@ -36,7 +36,7 @@ struct pasic3_data {
*/
void pasic3_write_register(struct device *dev, u32 reg, u8 val)
{
- struct pasic3_data *asic = dev->driver_data;
+ struct pasic3_data *asic = dev_get_drvdata(dev);
int bus_shift = asic->bus_shift;
void __iomem *addr = asic->mapping + (REG_ADDR << bus_shift);
void __iomem *data = asic->mapping + (REG_DATA << bus_shift);
@@ -51,7 +51,7 @@ EXPORT_SYMBOL(pasic3_write_register); /* for leds-pasic3 */
*/
u8 pasic3_read_register(struct device *dev, u32 reg)
{
- struct pasic3_data *asic = dev->driver_data;
+ struct pasic3_data *asic = dev_get_drvdata(dev);
int bus_shift = asic->bus_shift;
void __iomem *addr = asic->mapping + (REG_ADDR << bus_shift);
void __iomem *data = asic->mapping + (REG_DATA << bus_shift);
@@ -65,46 +65,15 @@ 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 +82,10 @@ 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;
@@ -124,96 +94,89 @@ 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,
+ .reset_recover_delay = 1,
};
-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 const struct mfd_cell ds1wm_cell __initconst = {
+ .name = "ds1wm",
+ .enable = ds1wm_enable,
+ .disable = ds1wm_disable,
+ .platform_data = &ds1wm_pdata,
+ .pdata_size = sizeof(ds1wm_pdata),
+ .num_resources = 2,
+ .resources = ds1wm_resources,
+};
static int __init pasic3_probe(struct platform_device *pdev)
{
- struct pasic3_platform_data *pdata = pdev->dev.platform_data;
+ struct pasic3_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct device *dev = &pdev->dev;
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_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);
+ asic = devm_kzalloc(dev, 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);
+ 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);
- if (ret < 0)
- dev_warn(dev, "failed to register DS1WM\n");
+ /* calculate bus shift from mem resource */
+ asic->bus_shift = (resource_size(r) - 5) >> 3;
+
+ if (pdata && pdata->clock_rate) {
+ ds1wm_pdata.clock_rate = pdata->clock_rate;
+ /* the first 5 PASIC3 registers control the DS1WM */
+ ds1wm_resources[0].end = (5 << asic->bus_shift) - 1;
+ ret = mfd_add_devices(&pdev->dev, pdev->id,
+ &ds1wm_cell, 1, r, irq, NULL);
+ if (ret < 0)
+ dev_warn(dev, "failed to register DS1WM\n");
+ }
- if (pdata->led_pdata) {
- ret = led_device_add(dev, pdata->led_pdata);
+ if (pdata && pdata->led_pdata) {
+ led_cell.platform_data = pdata->led_pdata;
+ led_cell.pdata_size = sizeof(struct pasic3_leds_machinfo);
+ ret = mfd_add_devices(&pdev->dev, pdev->id, &led_cell, 1, r,
+ 0, NULL);
if (ret < 0)
dev_warn(dev, "failed to register LED device\n");
}
@@ -226,15 +189,11 @@ 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);
- kfree(asic);
+ release_mem_region(r->start, resource_size(r));
return 0;
}
@@ -247,18 +206,7 @@ static struct platform_driver pasic3_driver = {
.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_platform_driver_probe(pasic3_driver, pasic3_probe);
MODULE_AUTHOR("Philipp Zabel <philipp.zabel@gmail.com>");
MODULE_DESCRIPTION("Core driver for HTC PASIC3");
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-09 06:24:08 +0000