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Message-Id: <20231006094033.3082468-2-andriy.shevchenko@linux.intel.com>
Date: Fri, 6 Oct 2023 12:40:33 +0300
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: Mika Westerberg <mika.westerberg@...ux.intel.com>,
Andy Shevchenko <andy@...nel.org>,
Linus Walleij <linus.walleij@...aro.org>,
Raag Jadav <raag.jadav@...el.com>
Subject: [PATCH v1 2/2] pinctrl: cherryview: Simplify code with cleanup helpers
Use macros defined in linux/cleanup.h to automate resource lifetime
control in the driver.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
drivers/pinctrl/intel/pinctrl-cherryview.c | 137 +++++++--------------
1 file changed, 47 insertions(+), 90 deletions(-)
diff --git a/drivers/pinctrl/intel/pinctrl-cherryview.c b/drivers/pinctrl/intel/pinctrl-cherryview.c
index 9b9f18f50c1d..2ffeccc83ccd 100644
--- a/drivers/pinctrl/intel/pinctrl-cherryview.c
+++ b/drivers/pinctrl/intel/pinctrl-cherryview.c
@@ -12,6 +12,7 @@
#include <linux/acpi.h>
#include <linux/array_size.h>
+#include <linux/cleanup.h>
#include <linux/dmi.h>
#include <linux/gpio/driver.h>
#include <linux/module.h>
@@ -626,15 +627,12 @@ static void chv_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
unsigned int offset)
{
struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
- unsigned long flags;
u32 ctrl0, ctrl1;
- raw_spin_lock_irqsave(&chv_lock, flags);
-
- ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
- ctrl1 = chv_readl(pctrl, offset, CHV_PADCTRL1);
-
- raw_spin_unlock_irqrestore(&chv_lock, flags);
+ scoped_guard(raw_spinlock_irqsave, &chv_lock) {
+ ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
+ ctrl1 = chv_readl(pctrl, offset, CHV_PADCTRL1);
+ }
if (ctrl0 & CHV_PADCTRL0_GPIOEN) {
seq_puts(s, "GPIO ");
@@ -666,17 +664,15 @@ static int chv_pinmux_set_mux(struct pinctrl_dev *pctldev,
struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
struct device *dev = pctrl->dev;
const struct intel_pingroup *grp;
- unsigned long flags;
int i;
grp = &pctrl->soc->groups[group];
- raw_spin_lock_irqsave(&chv_lock, flags);
+ guard(raw_spinlock_irqsave)(&chv_lock);
/* Check first that the pad is not locked */
for (i = 0; i < grp->grp.npins; i++) {
if (chv_pad_locked(pctrl, grp->grp.pins[i])) {
- raw_spin_unlock_irqrestore(&chv_lock, flags);
dev_warn(dev, "unable to set mode for locked pin %u\n", grp->grp.pins[i]);
return -EBUSY;
}
@@ -716,8 +712,6 @@ static int chv_pinmux_set_mux(struct pinctrl_dev *pctldev,
invert_oe ? "" : "not ");
}
- raw_spin_unlock_irqrestore(&chv_lock, flags);
-
return 0;
}
@@ -748,16 +742,14 @@ static int chv_gpio_request_enable(struct pinctrl_dev *pctldev,
unsigned int offset)
{
struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
- unsigned long flags;
u32 value;
- raw_spin_lock_irqsave(&chv_lock, flags);
+ guard(raw_spinlock_irqsave)(&chv_lock);
if (chv_pad_locked(pctrl, offset)) {
value = chv_readl(pctrl, offset, CHV_PADCTRL0);
if (!(value & CHV_PADCTRL0_GPIOEN)) {
/* Locked so cannot enable */
- raw_spin_unlock_irqrestore(&chv_lock, flags);
return -EBUSY;
}
} else {
@@ -792,8 +784,6 @@ static int chv_gpio_request_enable(struct pinctrl_dev *pctldev,
chv_writel(pctrl, offset, CHV_PADCTRL0, value);
}
- raw_spin_unlock_irqrestore(&chv_lock, flags);
-
return 0;
}
@@ -802,14 +792,13 @@ static void chv_gpio_disable_free(struct pinctrl_dev *pctldev,
unsigned int offset)
{
struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
- unsigned long flags;
- raw_spin_lock_irqsave(&chv_lock, flags);
+ guard(raw_spinlock_irqsave)(&chv_lock);
- if (!chv_pad_locked(pctrl, offset))
- chv_gpio_clear_triggering(pctrl, offset);
+ if (chv_pad_locked(pctrl, offset))
+ return;
- raw_spin_unlock_irqrestore(&chv_lock, flags);
+ chv_gpio_clear_triggering(pctrl, offset);
}
static int chv_gpio_set_direction(struct pinctrl_dev *pctldev,
@@ -817,10 +806,9 @@ static int chv_gpio_set_direction(struct pinctrl_dev *pctldev,
unsigned int offset, bool input)
{
struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
- unsigned long flags;
u32 ctrl0;
- raw_spin_lock_irqsave(&chv_lock, flags);
+ guard(raw_spinlock_irqsave)(&chv_lock);
ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0) & ~CHV_PADCTRL0_GPIOCFG_MASK;
if (input)
@@ -829,8 +817,6 @@ static int chv_gpio_set_direction(struct pinctrl_dev *pctldev,
ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPO << CHV_PADCTRL0_GPIOCFG_SHIFT;
chv_writel(pctrl, offset, CHV_PADCTRL0, ctrl0);
- raw_spin_unlock_irqrestore(&chv_lock, flags);
-
return 0;
}
@@ -849,15 +835,14 @@ static int chv_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
{
struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
enum pin_config_param param = pinconf_to_config_param(*config);
- unsigned long flags;
u32 ctrl0, ctrl1;
u16 arg = 0;
u32 term;
- raw_spin_lock_irqsave(&chv_lock, flags);
- ctrl0 = chv_readl(pctrl, pin, CHV_PADCTRL0);
- ctrl1 = chv_readl(pctrl, pin, CHV_PADCTRL1);
- raw_spin_unlock_irqrestore(&chv_lock, flags);
+ scoped_guard(raw_spinlock_irqsave, &chv_lock) {
+ ctrl0 = chv_readl(pctrl, pin, CHV_PADCTRL0);
+ ctrl1 = chv_readl(pctrl, pin, CHV_PADCTRL1);
+ }
term = (ctrl0 & CHV_PADCTRL0_TERM_MASK) >> CHV_PADCTRL0_TERM_SHIFT;
@@ -932,10 +917,10 @@ static int chv_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
static int chv_config_set_pull(struct intel_pinctrl *pctrl, unsigned int pin,
enum pin_config_param param, u32 arg)
{
- unsigned long flags;
u32 ctrl0, pull;
- raw_spin_lock_irqsave(&chv_lock, flags);
+ guard(raw_spinlock_irqsave)(&chv_lock);
+
ctrl0 = chv_readl(pctrl, pin, CHV_PADCTRL0);
switch (param) {
@@ -958,7 +943,6 @@ static int chv_config_set_pull(struct intel_pinctrl *pctrl, unsigned int pin,
pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT;
break;
default:
- raw_spin_unlock_irqrestore(&chv_lock, flags);
return -EINVAL;
}
@@ -976,7 +960,6 @@ static int chv_config_set_pull(struct intel_pinctrl *pctrl, unsigned int pin,
pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT;
break;
default:
- raw_spin_unlock_irqrestore(&chv_lock, flags);
return -EINVAL;
}
@@ -984,12 +967,10 @@ static int chv_config_set_pull(struct intel_pinctrl *pctrl, unsigned int pin,
break;
default:
- raw_spin_unlock_irqrestore(&chv_lock, flags);
return -EINVAL;
}
chv_writel(pctrl, pin, CHV_PADCTRL0, ctrl0);
- raw_spin_unlock_irqrestore(&chv_lock, flags);
return 0;
}
@@ -997,10 +978,10 @@ static int chv_config_set_pull(struct intel_pinctrl *pctrl, unsigned int pin,
static int chv_config_set_oden(struct intel_pinctrl *pctrl, unsigned int pin,
bool enable)
{
- unsigned long flags;
u32 ctrl1;
- raw_spin_lock_irqsave(&chv_lock, flags);
+ guard(raw_spinlock_irqsave)(&chv_lock);
+
ctrl1 = chv_readl(pctrl, pin, CHV_PADCTRL1);
if (enable)
@@ -1009,7 +990,6 @@ static int chv_config_set_oden(struct intel_pinctrl *pctrl, unsigned int pin,
ctrl1 &= ~CHV_PADCTRL1_ODEN;
chv_writel(pctrl, pin, CHV_PADCTRL1, ctrl1);
- raw_spin_unlock_irqrestore(&chv_lock, flags);
return 0;
}
@@ -1119,28 +1099,26 @@ static struct pinctrl_desc chv_pinctrl_desc = {
static int chv_gpio_get(struct gpio_chip *chip, unsigned int offset)
{
struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
- unsigned long flags;
u32 ctrl0, cfg;
- raw_spin_lock_irqsave(&chv_lock, flags);
- ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
- raw_spin_unlock_irqrestore(&chv_lock, flags);
+ scoped_guard(raw_spinlock_irqsave, &chv_lock)
+ ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
if (cfg == CHV_PADCTRL0_GPIOCFG_GPO)
return !!(ctrl0 & CHV_PADCTRL0_GPIOTXSTATE);
+
return !!(ctrl0 & CHV_PADCTRL0_GPIORXSTATE);
}
static void chv_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
{
struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
- unsigned long flags;
u32 ctrl0;
- raw_spin_lock_irqsave(&chv_lock, flags);
+ guard(raw_spinlock_irqsave)(&chv_lock);
ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
@@ -1150,19 +1128,15 @@ static void chv_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
ctrl0 &= ~CHV_PADCTRL0_GPIOTXSTATE;
chv_writel(pctrl, offset, CHV_PADCTRL0, ctrl0);
-
- raw_spin_unlock_irqrestore(&chv_lock, flags);
}
static int chv_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
{
struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
u32 ctrl0, direction;
- unsigned long flags;
- raw_spin_lock_irqsave(&chv_lock, flags);
- ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
- raw_spin_unlock_irqrestore(&chv_lock, flags);
+ scoped_guard(raw_spinlock_irqsave, &chv_lock)
+ ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
direction = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
direction >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
@@ -1203,23 +1177,20 @@ static void chv_gpio_irq_ack(struct irq_data *d)
irq_hw_number_t hwirq = irqd_to_hwirq(d);
u32 intr_line;
- raw_spin_lock(&chv_lock);
+ guard(raw_spinlock)(&chv_lock);
intr_line = chv_readl(pctrl, hwirq, CHV_PADCTRL0);
intr_line &= CHV_PADCTRL0_INTSEL_MASK;
intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT;
chv_pctrl_writel(pctrl, CHV_INTSTAT, BIT(intr_line));
-
- raw_spin_unlock(&chv_lock);
}
static void chv_gpio_irq_mask_unmask(struct gpio_chip *gc, irq_hw_number_t hwirq, bool mask)
{
struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
u32 value, intr_line;
- unsigned long flags;
- raw_spin_lock_irqsave(&chv_lock, flags);
+ guard(raw_spinlock_irqsave)(&chv_lock);
intr_line = chv_readl(pctrl, hwirq, CHV_PADCTRL0);
intr_line &= CHV_PADCTRL0_INTSEL_MASK;
@@ -1231,8 +1202,6 @@ static void chv_gpio_irq_mask_unmask(struct gpio_chip *gc, irq_hw_number_t hwirq
else
value |= BIT(intr_line);
chv_pctrl_writel(pctrl, CHV_INTMASK, value);
-
- raw_spin_unlock_irqrestore(&chv_lock, flags);
}
static void chv_gpio_irq_mask(struct irq_data *d)
@@ -1257,7 +1226,15 @@ static unsigned chv_gpio_irq_startup(struct irq_data *d)
{
/*
* Check if the interrupt has been requested with 0 as triggering
- * type. In that case it is assumed that the current values
+ * type. If not, bail out, ...
+ */
+ if (irqd_get_trigger_type(d) != IRQ_TYPE_NONE) {
+ chv_gpio_irq_unmask(d);
+ return 0;
+ }
+
+ /*
+ * ...otherwise it is assumed that the current values
* programmed to the hardware are used (e.g BIOS configured
* defaults).
*
@@ -1265,17 +1242,15 @@ static unsigned chv_gpio_irq_startup(struct irq_data *d)
* read back the values from hardware now, set correct flow handler
* and update mappings before the interrupt is being used.
*/
- if (irqd_get_trigger_type(d) == IRQ_TYPE_NONE) {
+ scoped_guard(raw_spinlock_irqsave, &chv_lock) {
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
struct device *dev = pctrl->dev;
struct intel_community_context *cctx = &pctrl->context.communities[0];
irq_hw_number_t hwirq = irqd_to_hwirq(d);
irq_flow_handler_t handler;
- unsigned long flags;
u32 intsel, value;
- raw_spin_lock_irqsave(&chv_lock, flags);
intsel = chv_readl(pctrl, hwirq, CHV_PADCTRL0);
intsel &= CHV_PADCTRL0_INTSEL_MASK;
intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
@@ -1292,7 +1267,6 @@ static unsigned chv_gpio_irq_startup(struct irq_data *d)
intsel, hwirq);
cctx->intr_lines[intsel] = hwirq;
}
- raw_spin_unlock_irqrestore(&chv_lock, flags);
}
chv_gpio_irq_unmask(d);
@@ -1357,17 +1331,14 @@ static int chv_gpio_irq_type(struct irq_data *d, unsigned int type)
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
irq_hw_number_t hwirq = irqd_to_hwirq(d);
- unsigned long flags;
u32 value;
int ret;
- raw_spin_lock_irqsave(&chv_lock, flags);
+ guard(raw_spinlock_irqsave)(&chv_lock);
ret = chv_gpio_set_intr_line(pctrl, hwirq);
- if (ret) {
- raw_spin_unlock_irqrestore(&chv_lock, flags);
+ if (ret)
return ret;
- }
/*
* Pins which can be used as shared interrupt are configured in
@@ -1408,8 +1379,6 @@ static int chv_gpio_irq_type(struct irq_data *d, unsigned int type)
else if (type & IRQ_TYPE_LEVEL_MASK)
irq_set_handler_locked(d, handle_level_irq);
- raw_spin_unlock_irqrestore(&chv_lock, flags);
-
return 0;
}
@@ -1433,14 +1402,12 @@ static void chv_gpio_irq_handler(struct irq_desc *desc)
struct intel_community_context *cctx = &pctrl->context.communities[0];
struct irq_chip *chip = irq_desc_get_chip(desc);
unsigned long pending;
- unsigned long flags;
u32 intr_line;
chained_irq_enter(chip, desc);
- raw_spin_lock_irqsave(&chv_lock, flags);
- pending = chv_pctrl_readl(pctrl, CHV_INTSTAT);
- raw_spin_unlock_irqrestore(&chv_lock, flags);
+ scoped_guard(raw_spinlock_irqsave, &chv_lock)
+ pending = chv_pctrl_readl(pctrl, CHV_INTSTAT);
for_each_set_bit(intr_line, &pending, community->nirqs) {
unsigned int offset;
@@ -1629,21 +1596,17 @@ static acpi_status chv_pinctrl_mmio_access_handler(u32 function,
void *handler_context, void *region_context)
{
struct intel_pinctrl *pctrl = region_context;
- unsigned long flags;
- acpi_status ret = AE_OK;
- raw_spin_lock_irqsave(&chv_lock, flags);
+ guard(raw_spinlock_irqsave)(&chv_lock);
if (function == ACPI_WRITE)
chv_pctrl_writel(pctrl, address, *value);
else if (function == ACPI_READ)
*value = chv_pctrl_readl(pctrl, address);
else
- ret = AE_BAD_PARAMETER;
+ return AE_BAD_PARAMETER;
- raw_spin_unlock_irqrestore(&chv_lock, flags);
-
- return ret;
+ return AE_OK;
}
static int chv_pinctrl_probe(struct platform_device *pdev)
@@ -1751,10 +1714,9 @@ static int chv_pinctrl_suspend_noirq(struct device *dev)
{
struct intel_pinctrl *pctrl = dev_get_drvdata(dev);
struct intel_community_context *cctx = &pctrl->context.communities[0];
- unsigned long flags;
int i;
- raw_spin_lock_irqsave(&chv_lock, flags);
+ guard(raw_spinlock_irqsave)(&chv_lock);
cctx->saved_intmask = chv_pctrl_readl(pctrl, CHV_INTMASK);
@@ -1772,8 +1734,6 @@ static int chv_pinctrl_suspend_noirq(struct device *dev)
ctx->padctrl1 = chv_readl(pctrl, desc->number, CHV_PADCTRL1);
}
- raw_spin_unlock_irqrestore(&chv_lock, flags);
-
return 0;
}
@@ -1781,10 +1741,9 @@ static int chv_pinctrl_resume_noirq(struct device *dev)
{
struct intel_pinctrl *pctrl = dev_get_drvdata(dev);
struct intel_community_context *cctx = &pctrl->context.communities[0];
- unsigned long flags;
int i;
- raw_spin_lock_irqsave(&chv_lock, flags);
+ guard(raw_spinlock_irqsave)(&chv_lock);
/*
* Mask all interrupts before restoring per-pin configuration
@@ -1826,8 +1785,6 @@ static int chv_pinctrl_resume_noirq(struct device *dev)
chv_pctrl_writel(pctrl, CHV_INTSTAT, 0xffff);
chv_pctrl_writel(pctrl, CHV_INTMASK, cctx->saved_intmask);
- raw_spin_unlock_irqrestore(&chv_lock, flags);
-
return 0;
}
--
2.40.0.1.gaa8946217a0b
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