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mfd: asic3: enable DS1WM cell

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This enables the ASIC3's DS1WM MFD cell, supported by the ds1wm driver.

Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Philipp Zabel 2009-06-15 12:10:24 +02:00 committed by Samuel Ortiz
parent 1b89040c3a
commit 9461f65a85
2 changed files with 100 additions and 0 deletions
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1
drivers/mfd/Kconfig
View File

@ -30,6 +30,7 @@ config MFD_SM501_GPIO
config MFD_ASIC3
bool "Support for Compaq ASIC3"
depends on GENERIC_HARDIRQS && GPIOLIB && ARM
select MFD_CORE
---help---
This driver supports the ASIC3 multifunction chip found on many
PDAs (mainly iPAQ and HTC based ones)

99
drivers/mfd/asic3.c
View File

@ -17,6 +17,7 @@
*/
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <linux/gpio.h>
#include <linux/io.h>
@ -24,6 +25,8 @@
#include <linux/platform_device.h>
#include <linux/mfd/asic3.h>
#include <linux/mfd/core.h>
#include <linux/mfd/ds1wm.h>
enum {
ASIC3_CLOCK_SPI,
@ -616,6 +619,98 @@ static void asic3_clk_disable(struct asic3 *asic, struct asic3_clk *clk)
spin_unlock_irqrestore(&asic->lock, flags);
}
/* MFD cells (SPI, PWM, LED, DS1WM, MMC) */
static struct ds1wm_driver_data ds1wm_pdata = {
.active_high = 1,
};
static struct resource ds1wm_resources[] = {
{
.start = ASIC3_OWM_BASE,
.end = ASIC3_OWM_BASE + 0x13,
.flags = IORESOURCE_MEM,
},
{
.start = ASIC3_IRQ_OWM,
.start = ASIC3_IRQ_OWM,
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
},
};
static int ds1wm_enable(struct platform_device *pdev)
{
struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
/* Turn on external clocks and the OWM clock */
asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_OWM]);
msleep(1);
/* Reset and enable DS1WM */
asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET),
ASIC3_EXTCF_OWM_RESET, 1);
msleep(1);
asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET),
ASIC3_EXTCF_OWM_RESET, 0);
msleep(1);
asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
ASIC3_EXTCF_OWM_EN, 1);
msleep(1);
return 0;
}
static int ds1wm_disable(struct platform_device *pdev)
{
struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
ASIC3_EXTCF_OWM_EN, 0);
asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_OWM]);
asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
return 0;
}
static struct mfd_cell asic3_cell_ds1wm = {
.name = "ds1wm",
.enable = ds1wm_enable,
.disable = ds1wm_disable,
.driver_data = &ds1wm_pdata,
.num_resources = ARRAY_SIZE(ds1wm_resources),
.resources = ds1wm_resources,
};
static int __init asic3_mfd_probe(struct platform_device *pdev,
struct resource *mem)
{
struct asic3 *asic = platform_get_drvdata(pdev);
int ret;
/* DS1WM */
asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
ASIC3_EXTCF_OWM_SMB, 0);
ds1wm_resources[0].start >>= asic->bus_shift;
ds1wm_resources[0].end >>= asic->bus_shift;
asic3_cell_ds1wm.platform_data = &asic3_cell_ds1wm;
asic3_cell_ds1wm.data_size = sizeof(asic3_cell_ds1wm);
ret = mfd_add_devices(&pdev->dev, pdev->id,
&asic3_cell_ds1wm, 1, mem, asic->irq_base);
return ret;
}
static void asic3_mfd_remove(struct platform_device *pdev)
{
mfd_remove_devices(&pdev->dev);
}
/* Core */
static int __init asic3_probe(struct platform_device *pdev)
{
@ -683,6 +778,8 @@ static int __init asic3_probe(struct platform_device *pdev)
*/
memcpy(asic->clocks, asic3_clk_init, sizeof(asic3_clk_init));
asic3_mfd_probe(pdev, mem);
dev_info(asic->dev, "ASIC3 Core driver\n");
return 0;
@ -704,6 +801,8 @@ static int asic3_remove(struct platform_device *pdev)
int ret;
struct asic3 *asic = platform_get_drvdata(pdev);
asic3_mfd_remove(pdev);
ret = asic3_gpio_remove(pdev);
if (ret < 0)
return ret;