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Diffstat (limited to 'arch/powerpc/platforms/52xx/mpc52xx_gpt.c')
-rw-r--r--arch/powerpc/platforms/52xx/mpc52xx_gpt.c126
1 files changed, 58 insertions, 68 deletions
diff --git a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
index 22645a7c6b8a..7748b6641a3c 100644
--- a/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
+++ b/arch/powerpc/platforms/52xx/mpc52xx_gpt.c
@@ -1,15 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* MPC5200 General Purpose Timer device driver
*
* Copyright (c) 2009 Secret Lab Technologies Ltd.
* Copyright (c) 2008 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * This file is a driver for the the General Purpose Timer (gpt) devices
+ * This file is a driver for the General Purpose Timer (gpt) devices
* found on the MPC5200 SoC. Each timer has an IO pin which can be used
* for GPIO or can be used to raise interrupts. The timer function can
* be used independently from the IO pin, or it can be used to control
@@ -52,16 +48,18 @@
* the output mode. This driver does not change the output mode setting.
*/
-#include <linux/device.h>
+#include <linux/gpio/driver.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/of.h>
-#include <linux/of_platform.h>
-#include <linux/of_gpio.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
#include <linux/kernel.h>
+#include <linux/property.h>
#include <linux/slab.h>
#include <linux/fs.h>
#include <linux/watchdog.h>
@@ -90,7 +88,7 @@ struct mpc52xx_gpt_priv {
struct list_head list; /* List of all GPT devices */
struct device *dev;
struct mpc52xx_gpt __iomem *regs;
- spinlock_t lock;
+ raw_spinlock_t lock;
struct irq_domain *irqhost;
u32 ipb_freq;
u8 wdt_mode;
@@ -141,9 +139,9 @@ static void mpc52xx_gpt_irq_unmask(struct irq_data *d)
struct mpc52xx_gpt_priv *gpt = irq_data_get_irq_chip_data(d);
unsigned long flags;
- spin_lock_irqsave(&gpt->lock, flags);
+ raw_spin_lock_irqsave(&gpt->lock, flags);
setbits32(&gpt->regs->mode, MPC52xx_GPT_MODE_IRQ_EN);
- spin_unlock_irqrestore(&gpt->lock, flags);
+ raw_spin_unlock_irqrestore(&gpt->lock, flags);
}
static void mpc52xx_gpt_irq_mask(struct irq_data *d)
@@ -151,9 +149,9 @@ static void mpc52xx_gpt_irq_mask(struct irq_data *d)
struct mpc52xx_gpt_priv *gpt = irq_data_get_irq_chip_data(d);
unsigned long flags;
- spin_lock_irqsave(&gpt->lock, flags);
+ raw_spin_lock_irqsave(&gpt->lock, flags);
clrbits32(&gpt->regs->mode, MPC52xx_GPT_MODE_IRQ_EN);
- spin_unlock_irqrestore(&gpt->lock, flags);
+ raw_spin_unlock_irqrestore(&gpt->lock, flags);
}
static void mpc52xx_gpt_irq_ack(struct irq_data *d)
@@ -171,14 +169,14 @@ static int mpc52xx_gpt_irq_set_type(struct irq_data *d, unsigned int flow_type)
dev_dbg(gpt->dev, "%s: virq=%i type=%x\n", __func__, d->irq, flow_type);
- spin_lock_irqsave(&gpt->lock, flags);
+ raw_spin_lock_irqsave(&gpt->lock, flags);
reg = in_be32(&gpt->regs->mode) & ~MPC52xx_GPT_MODE_ICT_MASK;
if (flow_type & IRQF_TRIGGER_RISING)
reg |= MPC52xx_GPT_MODE_ICT_RISING;
if (flow_type & IRQF_TRIGGER_FALLING)
reg |= MPC52xx_GPT_MODE_ICT_FALLING;
out_be32(&gpt->regs->mode, reg);
- spin_unlock_irqrestore(&gpt->lock, flags);
+ raw_spin_unlock_irqrestore(&gpt->lock, flags);
return 0;
}
@@ -194,14 +192,11 @@ static struct irq_chip mpc52xx_gpt_irq_chip = {
static void mpc52xx_gpt_irq_cascade(struct irq_desc *desc)
{
struct mpc52xx_gpt_priv *gpt = irq_desc_get_handler_data(desc);
- int sub_virq;
u32 status;
status = in_be32(&gpt->regs->status) & MPC52xx_GPT_STATUS_IRQMASK;
- if (status) {
- sub_virq = irq_linear_revmap(gpt->irqhost, 0);
- generic_handle_irq(sub_virq);
- }
+ if (status)
+ generic_handle_domain_irq(gpt->irqhost, 0);
}
static int mpc52xx_gpt_irq_map(struct irq_domain *h, unsigned int virq,
@@ -226,7 +221,7 @@ static int mpc52xx_gpt_irq_xlate(struct irq_domain *h, struct device_node *ct,
dev_dbg(gpt->dev, "%s: flags=%i\n", __func__, intspec[0]);
if ((intsize < 1) || (intspec[0] > 3)) {
- dev_err(gpt->dev, "bad irq specifier in %s\n", ct->full_name);
+ dev_err(gpt->dev, "bad irq specifier in %pOF\n", ct);
return -EINVAL;
}
@@ -252,9 +247,9 @@ mpc52xx_gpt_irq_setup(struct mpc52xx_gpt_priv *gpt, struct device_node *node)
if (!cascade_virq)
return;
- gpt->irqhost = irq_domain_add_linear(node, 1, &mpc52xx_gpt_irq_ops, gpt);
+ gpt->irqhost = irq_domain_create_linear(of_fwnode_handle(node), 1, &mpc52xx_gpt_irq_ops, gpt);
if (!gpt->irqhost) {
- dev_err(gpt->dev, "irq_domain_add_linear() failed\n");
+ dev_err(gpt->dev, "irq_domain_create_linear() failed\n");
return;
}
@@ -264,11 +259,11 @@ mpc52xx_gpt_irq_setup(struct mpc52xx_gpt_priv *gpt, struct device_node *node)
/* If the GPT is currently disabled, then change it to be in Input
* Capture mode. If the mode is non-zero, then the pin could be
* already in use for something. */
- spin_lock_irqsave(&gpt->lock, flags);
+ raw_spin_lock_irqsave(&gpt->lock, flags);
mode = in_be32(&gpt->regs->mode);
if ((mode & MPC52xx_GPT_MODE_MS_MASK) == 0)
out_be32(&gpt->regs->mode, mode | MPC52xx_GPT_MODE_MS_IC);
- spin_unlock_irqrestore(&gpt->lock, flags);
+ raw_spin_unlock_irqrestore(&gpt->lock, flags);
dev_dbg(gpt->dev, "%s() complete. virq=%i\n", __func__, cascade_virq);
}
@@ -285,7 +280,7 @@ static int mpc52xx_gpt_gpio_get(struct gpio_chip *gc, unsigned int gpio)
return (in_be32(&gpt->regs->status) >> 8) & 1;
}
-static void
+static int
mpc52xx_gpt_gpio_set(struct gpio_chip *gc, unsigned int gpio, int v)
{
struct mpc52xx_gpt_priv *gpt = gpiochip_get_data(gc);
@@ -295,9 +290,11 @@ mpc52xx_gpt_gpio_set(struct gpio_chip *gc, unsigned int gpio, int v)
dev_dbg(gpt->dev, "%s: gpio:%d v:%d\n", __func__, gpio, v);
r = v ? MPC52xx_GPT_MODE_GPIO_OUT_HIGH : MPC52xx_GPT_MODE_GPIO_OUT_LOW;
- spin_lock_irqsave(&gpt->lock, flags);
+ raw_spin_lock_irqsave(&gpt->lock, flags);
clrsetbits_be32(&gpt->regs->mode, MPC52xx_GPT_MODE_GPIO_MASK, r);
- spin_unlock_irqrestore(&gpt->lock, flags);
+ raw_spin_unlock_irqrestore(&gpt->lock, flags);
+
+ return 0;
}
static int mpc52xx_gpt_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
@@ -307,9 +304,9 @@ static int mpc52xx_gpt_gpio_dir_in(struct gpio_chip *gc, unsigned int gpio)
dev_dbg(gpt->dev, "%s: gpio:%d\n", __func__, gpio);
- spin_lock_irqsave(&gpt->lock, flags);
+ raw_spin_lock_irqsave(&gpt->lock, flags);
clrbits32(&gpt->regs->mode, MPC52xx_GPT_MODE_GPIO_MASK);
- spin_unlock_irqrestore(&gpt->lock, flags);
+ raw_spin_unlock_irqrestore(&gpt->lock, flags);
return 0;
}
@@ -321,17 +318,15 @@ mpc52xx_gpt_gpio_dir_out(struct gpio_chip *gc, unsigned int gpio, int val)
return 0;
}
-static void
-mpc52xx_gpt_gpio_setup(struct mpc52xx_gpt_priv *gpt, struct device_node *node)
+static void mpc52xx_gpt_gpio_setup(struct mpc52xx_gpt_priv *gpt)
{
int rc;
- /* Only setup GPIO if the device tree claims the GPT is
- * a GPIO controller */
- if (!of_find_property(node, "gpio-controller", NULL))
+ /* Only setup GPIO if the device claims the GPT is a GPIO controller */
+ if (!device_property_present(gpt->dev, "gpio-controller"))
return;
- gpt->gc.label = kstrdup(node->full_name, GFP_KERNEL);
+ gpt->gc.label = kasprintf(GFP_KERNEL, "%pfw", dev_fwnode(gpt->dev));
if (!gpt->gc.label) {
dev_err(gpt->dev, "out of memory\n");
return;
@@ -343,7 +338,7 @@ mpc52xx_gpt_gpio_setup(struct mpc52xx_gpt_priv *gpt, struct device_node *node)
gpt->gc.get = mpc52xx_gpt_gpio_get;
gpt->gc.set = mpc52xx_gpt_gpio_set;
gpt->gc.base = -1;
- gpt->gc.of_node = node;
+ gpt->gc.parent = gpt->dev;
/* Setup external pin in GPIO mode */
clrsetbits_be32(&gpt->regs->mode, MPC52xx_GPT_MODE_MS_MASK,
@@ -356,8 +351,7 @@ mpc52xx_gpt_gpio_setup(struct mpc52xx_gpt_priv *gpt, struct device_node *node)
dev_dbg(gpt->dev, "%s() complete.\n", __func__);
}
#else /* defined(CONFIG_GPIOLIB) */
-static void
-mpc52xx_gpt_gpio_setup(struct mpc52xx_gpt_priv *p, struct device_node *np) { }
+static void mpc52xx_gpt_gpio_setup(struct mpc52xx_gpt_priv *gpt) { }
#endif /* defined(CONFIG_GPIOLIB) */
/***********************************************************************
@@ -377,7 +371,7 @@ struct mpc52xx_gpt_priv *mpc52xx_gpt_from_irq(int irq)
mutex_lock(&mpc52xx_gpt_list_mutex);
list_for_each(pos, &mpc52xx_gpt_list) {
gpt = container_of(pos, struct mpc52xx_gpt_priv, list);
- if (gpt->irqhost && irq == irq_linear_revmap(gpt->irqhost, 0)) {
+ if (gpt->irqhost && irq == irq_find_mapping(gpt->irqhost, 0)) {
mutex_unlock(&mpc52xx_gpt_list_mutex);
return gpt;
}
@@ -405,7 +399,7 @@ static int mpc52xx_gpt_do_start(struct mpc52xx_gpt_priv *gpt, u64 period,
set |= MPC52xx_GPT_MODE_CONTINUOUS;
/* Determine the number of clocks in the requested period. 64 bit
- * arithmatic is done here to preserve the precision until the value
+ * arithmetic is done here to preserve the precision until the value
* is scaled back down into the u32 range. Period is in 'ns', bus
* frequency is in Hz. */
clocks = period * (u64)gpt->ipb_freq;
@@ -436,16 +430,16 @@ static int mpc52xx_gpt_do_start(struct mpc52xx_gpt_priv *gpt, u64 period,
}
/* Set and enable the timer, reject an attempt to use a wdt as gpt */
- spin_lock_irqsave(&gpt->lock, flags);
+ raw_spin_lock_irqsave(&gpt->lock, flags);
if (as_wdt)
gpt->wdt_mode |= MPC52xx_GPT_IS_WDT;
else if ((gpt->wdt_mode & MPC52xx_GPT_IS_WDT) != 0) {
- spin_unlock_irqrestore(&gpt->lock, flags);
+ raw_spin_unlock_irqrestore(&gpt->lock, flags);
return -EBUSY;
}
out_be32(&gpt->regs->count, prescale << 16 | clocks);
clrsetbits_be32(&gpt->regs->mode, clear, set);
- spin_unlock_irqrestore(&gpt->lock, flags);
+ raw_spin_unlock_irqrestore(&gpt->lock, flags);
return 0;
}
@@ -476,14 +470,14 @@ int mpc52xx_gpt_stop_timer(struct mpc52xx_gpt_priv *gpt)
unsigned long flags;
/* reject the operation if the timer is used as watchdog (gpt 0 only) */
- spin_lock_irqsave(&gpt->lock, flags);
+ raw_spin_lock_irqsave(&gpt->lock, flags);
if ((gpt->wdt_mode & MPC52xx_GPT_IS_WDT) != 0) {
- spin_unlock_irqrestore(&gpt->lock, flags);
+ raw_spin_unlock_irqrestore(&gpt->lock, flags);
return -EBUSY;
}
clrbits32(&gpt->regs->mode, MPC52xx_GPT_MODE_COUNTER_ENABLE);
- spin_unlock_irqrestore(&gpt->lock, flags);
+ raw_spin_unlock_irqrestore(&gpt->lock, flags);
return 0;
}
EXPORT_SYMBOL(mpc52xx_gpt_stop_timer);
@@ -500,16 +494,16 @@ u64 mpc52xx_gpt_timer_period(struct mpc52xx_gpt_priv *gpt)
u64 prescale;
unsigned long flags;
- spin_lock_irqsave(&gpt->lock, flags);
+ raw_spin_lock_irqsave(&gpt->lock, flags);
period = in_be32(&gpt->regs->count);
- spin_unlock_irqrestore(&gpt->lock, flags);
+ raw_spin_unlock_irqrestore(&gpt->lock, flags);
prescale = period >> 16;
period &= 0xffff;
if (prescale == 0)
prescale = 0x10000;
period = period * prescale * 1000000000ULL;
- do_div(period, (u64)gpt->ipb_freq);
+ do_div(period, gpt->ipb_freq);
return period;
}
EXPORT_SYMBOL(mpc52xx_gpt_timer_period);
@@ -532,9 +526,9 @@ static inline void mpc52xx_gpt_wdt_ping(struct mpc52xx_gpt_priv *gpt_wdt)
{
unsigned long flags;
- spin_lock_irqsave(&gpt_wdt->lock, flags);
+ raw_spin_lock_irqsave(&gpt_wdt->lock, flags);
out_8((u8 *) &gpt_wdt->regs->mode, MPC52xx_GPT_MODE_WDT_PING);
- spin_unlock_irqrestore(&gpt_wdt->lock, flags);
+ raw_spin_unlock_irqrestore(&gpt_wdt->lock, flags);
}
/* wdt misc device api */
@@ -586,6 +580,7 @@ static long mpc52xx_wdt_ioctl(struct file *file, unsigned int cmd,
if (ret)
break;
/* fall through and return the timeout */
+ fallthrough;
case WDIOC_GETTIMEOUT:
/* we need to round here as to avoid e.g. the following
@@ -628,7 +623,7 @@ static int mpc52xx_wdt_open(struct inode *inode, struct file *file)
}
file->private_data = mpc52xx_gpt_wdt;
- return nonseekable_open(inode, file);
+ return stream_open(inode, file);
}
static int mpc52xx_wdt_release(struct inode *inode, struct file *file)
@@ -638,11 +633,11 @@ static int mpc52xx_wdt_release(struct inode *inode, struct file *file)
struct mpc52xx_gpt_priv *gpt_wdt = file->private_data;
unsigned long flags;
- spin_lock_irqsave(&gpt_wdt->lock, flags);
+ raw_spin_lock_irqsave(&gpt_wdt->lock, flags);
clrbits32(&gpt_wdt->regs->mode,
MPC52xx_GPT_MODE_COUNTER_ENABLE | MPC52xx_GPT_MODE_WDT_EN);
gpt_wdt->wdt_mode &= ~MPC52xx_GPT_IS_WDT;
- spin_unlock_irqrestore(&gpt_wdt->lock, flags);
+ raw_spin_unlock_irqrestore(&gpt_wdt->lock, flags);
#endif
clear_bit(0, &wdt_is_active);
return 0;
@@ -651,9 +646,9 @@ static int mpc52xx_wdt_release(struct inode *inode, struct file *file)
static const struct file_operations mpc52xx_wdt_fops = {
.owner = THIS_MODULE,
- .llseek = no_llseek,
.write = mpc52xx_wdt_write,
.unlocked_ioctl = mpc52xx_wdt_ioctl,
+ .compat_ioctl = compat_ptr_ioctl,
.open = mpc52xx_wdt_open,
.release = mpc52xx_wdt_release,
};
@@ -723,16 +718,16 @@ static int mpc52xx_gpt_probe(struct platform_device *ofdev)
if (!gpt)
return -ENOMEM;
- spin_lock_init(&gpt->lock);
+ raw_spin_lock_init(&gpt->lock);
gpt->dev = &ofdev->dev;
- gpt->ipb_freq = mpc5xxx_get_bus_frequency(ofdev->dev.of_node);
+ gpt->ipb_freq = mpc5xxx_get_bus_frequency(&ofdev->dev);
gpt->regs = of_iomap(ofdev->dev.of_node, 0);
if (!gpt->regs)
return -ENOMEM;
dev_set_drvdata(&ofdev->dev, gpt);
- mpc52xx_gpt_gpio_setup(gpt, ofdev->dev.of_node);
+ mpc52xx_gpt_gpio_setup(gpt);
mpc52xx_gpt_irq_setup(gpt, ofdev->dev.of_node);
mutex_lock(&mpc52xx_gpt_list_mutex);
@@ -740,8 +735,8 @@ static int mpc52xx_gpt_probe(struct platform_device *ofdev)
mutex_unlock(&mpc52xx_gpt_list_mutex);
/* check if this device could be a watchdog */
- if (of_get_property(ofdev->dev.of_node, "fsl,has-wdt", NULL) ||
- of_get_property(ofdev->dev.of_node, "has-wdt", NULL)) {
+ if (of_property_read_bool(ofdev->dev.of_node, "fsl,has-wdt") ||
+ of_property_read_bool(ofdev->dev.of_node, "has-wdt")) {
const u32 *on_boot_wdt;
gpt->wdt_mode = MPC52xx_GPT_CAN_WDT;
@@ -758,11 +753,6 @@ static int mpc52xx_gpt_probe(struct platform_device *ofdev)
return 0;
}
-static int mpc52xx_gpt_remove(struct platform_device *ofdev)
-{
- return -EBUSY;
-}
-
static const struct of_device_id mpc52xx_gpt_match[] = {
{ .compatible = "fsl,mpc5200-gpt", },
@@ -775,10 +765,10 @@ static const struct of_device_id mpc52xx_gpt_match[] = {
static struct platform_driver mpc52xx_gpt_driver = {
.driver = {
.name = "mpc52xx-gpt",
+ .suppress_bind_attrs = true,
.of_match_table = mpc52xx_gpt_match,
},
.probe = mpc52xx_gpt_probe,
- .remove = mpc52xx_gpt_remove,
};
static int __init mpc52xx_gpt_init(void)
generated by cgit (git 2.34.1) at 2025-12-26 13:07:00 +0000