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Diffstat (limited to 'arch/arm/plat-mxc/dptc.c')
-rw-r--r--arch/arm/plat-mxc/dptc.c78
1 files changed, 48 insertions, 30 deletions
diff --git a/arch/arm/plat-mxc/dptc.c b/arch/arm/plat-mxc/dptc.c
index 6b7f5599909e..a26fd9b8d516 100644
--- a/arch/arm/plat-mxc/dptc.c
+++ b/arch/arm/plat-mxc/dptc.c
@@ -1,5 +1,5 @@
/*
- * Copyright 2005-2009 Freescale Semiconductor, Inc. All Rights Reserved.
+ * Copyright 2005-2010 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
@@ -67,6 +67,7 @@ enum {
struct device *dev_data0;
struct device *dev_data1;
+struct dptc_device *dptc_device_data;
/*!
* In case the MXC device has multiple DPTC modules, this structure is used to
@@ -89,6 +90,8 @@ struct dptc_device {
int curr_wp;
/* DPTC vai bits */
u32 ptvai;
+ /* The base address of the DPTC */
+ void __iomem *membase;
/* The interrupt number used by the DPTC device */
int irq;
/* DPTC platform data pointer */
@@ -104,13 +107,13 @@ static void update_dptc_wp(struct dptc_device *drv_data, u32 wp)
voltage_uV = dptc_data->dptc_wp_allfreq[wp].voltage * 1000;
__raw_writel(dptc_data->dptc_wp_allfreq[wp].dcvr0,
- dptc_data->dcvr0_reg_addr);
+ drv_data->membase + dptc_data->dcvr0_reg_addr);
__raw_writel(dptc_data->dptc_wp_allfreq[wp].dcvr1,
- dptc_data->dcvr0_reg_addr + 0x4);
+ drv_data->membase + dptc_data->dcvr0_reg_addr + 0x4);
__raw_writel(dptc_data->dptc_wp_allfreq[wp].dcvr2,
- dptc_data->dcvr0_reg_addr + 0x8);
+ drv_data->membase + dptc_data->dcvr0_reg_addr + 0x8);
__raw_writel(dptc_data->dptc_wp_allfreq[wp].dcvr3,
- dptc_data->dcvr0_reg_addr + 0xC);
+ drv_data->membase + dptc_data->dcvr0_reg_addr + 0xC);
/* Set the voltage */
ret = regulator_set_voltage(drv_data->dptc_reg, voltage_uV, voltage_uV);
@@ -130,7 +133,8 @@ static irqreturn_t dptc_irq(int irq, void *dev_id)
struct device *dev = dev_id;
struct dptc_device *drv_data = dev->driver_data;
struct mxc_dptc_data *dptc_data = dev->platform_data;
- u32 dptccr = __raw_readl(dptc_data->dptccr_reg_addr);
+ u32 dptccr = __raw_readl(drv_data->membase
+ + dptc_data->dptccr_reg_addr);
u32 gpc_cntr = __raw_readl(dptc_data->gpc_cntr_reg_addr);
gpc_cntr = (gpc_cntr & dptc_data->dptccr);
@@ -145,7 +149,8 @@ static irqreturn_t dptc_irq(int irq, void *dev_id)
dptccr = (dptccr & ~(dptc_data->dptc_enable_bit)) |
(dptc_data->irq_mask);
dptccr = (dptccr & ~(dptc_data->dptc_nvcr_bit));
- __raw_writel(dptccr, dptc_data->dptccr_reg_addr);
+ __raw_writel(dptccr, drv_data->membase
+ + dptc_data->dptccr_reg_addr);
if (drv_data->turbo_mode_active == 1)
schedule_delayed_work(&drv_data->dptc_work, 0);
@@ -162,7 +167,8 @@ static void dptc_workqueue_handler(struct work_struct *work1)
struct dptc_device *drv_data =
container_of(dptc_work_tmp, struct dptc_device, dptc_work);
struct mxc_dptc_data *dptc_data = drv_data->dptc_platform_data;
- u32 dptccr = __raw_readl(dptc_data->dptccr_reg_addr);
+ u32 dptccr = __raw_readl(drv_data->membase
+ + dptc_data->dptccr_reg_addr);
switch (drv_data->ptvai) {
case DPTC_PTVAI_DECREASE:
@@ -193,7 +199,7 @@ static void dptc_workqueue_handler(struct work_struct *work1)
/* Enable DPTC and unmask its interrupt */
dptccr = (dptccr & ~(dptc_data->irq_mask)) |
dptc_data->dptc_nvcr_bit | dptc_data->dptc_enable_bit;
- __raw_writel(dptccr, dptc_data->dptccr_reg_addr);
+ __raw_writel(dptccr, drv_data->membase + dptc_data->dptccr_reg_addr);
}
/* Start DPTC unconditionally */
@@ -228,12 +234,12 @@ static int start_dptc(struct device *dev)
dptc_data->gpc_cntr_reg_addr);
}
- dptccr = __raw_readl(dptc_data->dptccr_reg_addr);
+ dptccr = __raw_readl(drv_data->membase + dptc_data->dptccr_reg_addr);
/* Enable DPTC and unmask its interrupt */
dptccr = ((dptccr & ~(dptc_data->irq_mask)) | dptc_data->enable_config);
- __raw_writel(dptccr, dptc_data->dptccr_reg_addr);
+ __raw_writel(dptccr, drv_data->membase + dptc_data->dptccr_reg_addr);
spin_unlock_irqrestore(&drv_data->lock, flags);
@@ -257,13 +263,13 @@ static void stop_dptc(struct device *dev)
struct dptc_device *drv_data = dev->driver_data;
u32 dptccr;
- dptccr = __raw_readl(dptc_data->dptccr_reg_addr);
+ dptccr = __raw_readl(drv_data->membase + dptc_data->dptccr_reg_addr);
/* disable DPTC and mask its interrupt */
dptccr = ((dptccr & ~(dptc_data->dptc_enable_bit)) |
dptc_data->irq_mask) & (~dptc_data->dptc_nvcr_bit);
- __raw_writel(dptccr, dptc_data->dptccr_reg_addr);
+ __raw_writel(dptccr, drv_data->membase + dptc_data->dptccr_reg_addr);
/* Restore Turbo Mode voltage to highest wp */
update_dptc_wp(drv_data, 0);
@@ -304,12 +310,12 @@ void dptc_suspend(int id)
if (!drv_data->dptc_is_active)
return;
- dptccr = __raw_readl(dptc_data->dptccr_reg_addr);
+ dptccr = __raw_readl(drv_data->membase + dptc_data->dptccr_reg_addr);
/* Disable DPTC and mask its interrupt */
dptccr = (dptccr & ~(dptc_data->dptc_enable_bit)) | dptc_data->irq_mask;
- __raw_writel(dptccr, dptc_data->dptccr_reg_addr);
+ __raw_writel(dptccr, drv_data->membase + dptc_data->dptccr_reg_addr);
}
EXPORT_SYMBOL(dptc_suspend);
@@ -344,20 +350,20 @@ void dptc_resume(int id)
return;
__raw_writel(dptc_data->dptc_wp_allfreq[0].dcvr0,
- dptc_data->dcvr0_reg_addr);
+ drv_data->membase + dptc_data->dcvr0_reg_addr);
__raw_writel(dptc_data->dptc_wp_allfreq[0].dcvr1,
- dptc_data->dcvr0_reg_addr + 0x4);
+ drv_data->membase + dptc_data->dcvr0_reg_addr + 0x4);
__raw_writel(dptc_data->dptc_wp_allfreq[0].dcvr2,
- dptc_data->dcvr0_reg_addr + 0x8);
+ drv_data->membase + dptc_data->dcvr0_reg_addr + 0x8);
__raw_writel(dptc_data->dptc_wp_allfreq[0].dcvr3,
- dptc_data->dcvr0_reg_addr + 0xC);
+ drv_data->membase + dptc_data->dcvr0_reg_addr + 0xC);
- dptccr = __raw_readl(dptc_data->dptccr_reg_addr);
+ dptccr = __raw_readl(drv_data->membase + dptc_data->dptccr_reg_addr);
/* Enable DPTC and unmask its interrupt */
dptccr = (dptccr & ~(dptc_data->irq_mask)) | dptc_data->dptc_enable_bit;
- __raw_writel(dptccr, dptc_data->dptccr_reg_addr);
+ __raw_writel(dptccr, drv_data->membase + dptc_data->dptccr_reg_addr);
}
EXPORT_SYMBOL(dptc_resume);
@@ -426,7 +432,6 @@ static DEVICE_ATTR(enable, 0644, dptc_show, dptc_store);
*/
static int __devinit mxc_dptc_probe(struct platform_device *pdev)
{
- struct dptc_device *dptc_device_data;
int ret = 0;
struct resource *res;
u32 dptccr = 0;
@@ -449,13 +454,16 @@ static int __devinit mxc_dptc_probe(struct platform_device *pdev)
goto err1;
}
+ dptc_device_data->membase = ioremap(res->start,
+ res->end - res->start + 1);
+
/*
* Request the DPTC interrupt
*/
dptc_device_data->irq = platform_get_irq(pdev, 0);
if (dptc_device_data->irq < 0) {
ret = dptc_device_data->irq;
- goto err1;
+ goto err2;
}
ret =
@@ -463,7 +471,7 @@ static int __devinit mxc_dptc_probe(struct platform_device *pdev)
pdev->name, &pdev->dev);
if (ret) {
printk(KERN_ERR "DPTC: Unable to attach to DPTC interrupt\n");
- goto err1;
+ goto err2;
}
dptc_device_data->curr_wp = 0;
@@ -471,7 +479,8 @@ static int __devinit mxc_dptc_probe(struct platform_device *pdev)
dptc_device_data->turbo_mode_active = 0;
dptc_device_data->ptvai = 0;
- dptccr = __raw_readl(dptc_data->dptccr_reg_addr);
+ dptccr = __raw_readl(dptc_device_data->membase
+ + dptc_data->dptccr_reg_addr);
printk(KERN_INFO "DPTC mxc_dptc_probe()\n");
@@ -487,32 +496,33 @@ static int __devinit mxc_dptc_probe(struct platform_device *pdev)
else
printk(KERN_ERR "DPTC: Pointer to DPTC table is NULL\
not started\n");
- goto err1;
+ goto err3;
}
dptc_device_data->dptc_reg = regulator_get(NULL, dptc_data->reg_id);
if (IS_ERR(dptc_device_data->dptc_reg)) {
clk_put(dptc_device_data->dptc_clk);
printk(KERN_ERR "%s: failed to get regulator\n", __func__);
- goto err1;
+ goto err3;
}
INIT_DELAYED_WORK(&dptc_device_data->dptc_work, dptc_workqueue_handler);
/* Enable Reference Circuits */
dptccr = (dptccr & ~(dptc_data->dcr_mask)) | dptc_data->init_config;
- __raw_writel(dptccr, dptc_data->dptccr_reg_addr);
+ __raw_writel(dptccr, dptc_device_data->membase
+ + dptc_data->dptccr_reg_addr);
ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_enable.attr);
if (ret) {
printk(KERN_ERR
"DPTC: Unable to register sysdev entry for dptc");
- goto err1;
+ goto err3;
}
if (ret != 0) {
printk(KERN_ERR "DPTC: Unable to start");
- goto err1;
+ goto err3;
}
dptc_device_data->dptc_clk = clk_get(NULL, dptc_data->clk_id);
@@ -529,6 +539,10 @@ static int __devinit mxc_dptc_probe(struct platform_device *pdev)
return 0;
+err3:
+ free_irq(dptc_device_data->irq, &pdev->dev);
+err2:
+ iounmap(dptc_device_data->membase);
err1:
dev_err(&pdev->dev, "Failed to probe DPTC\n");
kfree(dptc_device_data);
@@ -607,6 +621,10 @@ static int __init dptc_init(void)
static void __exit dptc_cleanup(void)
{
+ free_irq(dptc_device_data->irq, NULL);
+ iounmap(dptc_device_data->membase);
+ kfree(dptc_device_data);
+
/* Unregister the device structure */
platform_driver_unregister(&mxc_dptc_driver);
generated by cgit v1.2.3 (git 2.0.4) at 2024-04-28 07:38:56 +0000