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regmap: Updates for v4.21

Browse source 
This has been a busy release for the regmap-irq code, there's several
 new features been added, including an API cleanup for how we specify
 types that affected one existing driver (gpio-max77620):
 
  - Support for hardware that flags rising and falling edges on separate
    status bits from Bartosz Golaszewski.
  - Support for explicitly clearing interrupts before unmasking from
    Bartosz Golaszewski.
  - Support for level triggered IRQs from Matti Vaittinen.
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Merge tag 'regmap-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap

Pull regmap updates from Mark Brown:
 "This has been a busy release for the regmap-irq code, there's several
  new features been added, including an API cleanup for how we specify
  types that affected one existing driver (gpio-max77620):

   - Support for hardware that flags rising and falling edges on
     separate status bits from Bartosz Golaszewski.

   - Support for explicitly clearing interrupts before unmasking from
     Bartosz Golaszewski.

   - Support for level triggered IRQs from Matti Vaittinen"

* tag 'regmap-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: irq: add an option to clear status registers on unmask
  regmap: regmap-irq/gpio-max77620: add level-irq support
  regmap: regmap-irq: Remove default irq type setting from core
  regmap: debugfs: convert to DEFINE_SHOW_ATTRIBUTE
  regmap: rbtree: convert to DEFINE_SHOW_ATTRIBUTE
  regmap: irq: handle HW using separate rising/falling edge interrupts
  regmap: add a new macro:REGMAP_IRQ_REG_LINE(_id, _reg_bits)
This commit is contained in:
Linus Torvalds 2018-12-25 14:48:06 -08:00
commit b1669432b3
5 changed files with 200 additions and 103 deletions
Download patch file Download diff file Expand all files Collapse all files

12
drivers/base/regmap/regcache-rbtree.c
View file

@ -177,17 +177,7 @@ static int rbtree_show(struct seq_file *s, void *ignored)
return 0;
}
static int rbtree_open(struct inode *inode, struct file *file)
{
return single_open(file, rbtree_show, inode->i_private);
}
static const struct file_operations rbtree_fops = {
.open = rbtree_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
DEFINE_SHOW_ATTRIBUTE(rbtree);
static void rbtree_debugfs_init(struct regmap *map)
{

12
drivers/base/regmap/regmap-debugfs.c
View file

@ -435,17 +435,7 @@ static int regmap_access_show(struct seq_file *s, void *ignored)
return 0;
}
static int access_open(struct inode *inode, struct file *file)
{
return single_open(file, regmap_access_show, inode->i_private);
}
static const struct file_operations regmap_access_fops = {
.open = access_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
DEFINE_SHOW_ATTRIBUTE(regmap_access);
static ssize_t regmap_cache_only_write_file(struct file *file,
const char __user *user_buf,

142
drivers/base/regmap/regmap-irq.c
View file

@ -44,6 +44,8 @@ struct regmap_irq_chip_data {
unsigned int irq_reg_stride;
unsigned int type_reg_stride;
bool clear_status:1;
};
static inline const
@ -77,6 +79,7 @@ static void regmap_irq_sync_unlock(struct irq_data *data)
int i, ret;
u32 reg;
u32 unmask_offset;
u32 val;
if (d->chip->runtime_pm) {
ret = pm_runtime_get_sync(map->dev);
@ -85,6 +88,20 @@ static void regmap_irq_sync_unlock(struct irq_data *data)
ret);
}
if (d->clear_status) {
for (i = 0; i < d->chip->num_regs; i++) {
reg = d->chip->status_base +
(i * map->reg_stride * d->irq_reg_stride);
ret = regmap_read(map, reg, &val);
if (ret)
dev_err(d->map->dev,
"Failed to clear the interrupt status bits\n");
}
d->clear_status = false;
}
/*
* If there's been a change in the mask write it back to the
* hardware. We rely on the use of the regmap core cache to
@ -157,20 +174,23 @@ static void regmap_irq_sync_unlock(struct irq_data *data)
}
}
for (i = 0; i < d->chip->num_type_reg; i++) {
if (!d->type_buf_def[i])
continue;
reg = d->chip->type_base +
(i * map->reg_stride * d->type_reg_stride);
if (d->chip->type_invert)
ret = regmap_irq_update_bits(d, reg,
d->type_buf_def[i], ~d->type_buf[i]);
else
ret = regmap_irq_update_bits(d, reg,
d->type_buf_def[i], d->type_buf[i]);
if (ret != 0)
dev_err(d->map->dev, "Failed to sync type in %x\n",
reg);
/* Don't update the type bits if we're using mask bits for irq type. */
if (!d->chip->type_in_mask) {
for (i = 0; i < d->chip->num_type_reg; i++) {
if (!d->type_buf_def[i])
continue;
reg = d->chip->type_base +
(i * map->reg_stride * d->type_reg_stride);
if (d->chip->type_invert)
ret = regmap_irq_update_bits(d, reg,
d->type_buf_def[i], ~d->type_buf[i]);
else
ret = regmap_irq_update_bits(d, reg,
d->type_buf_def[i], d->type_buf[i]);
if (ret != 0)
dev_err(d->map->dev, "Failed to sync type in %x\n",
reg);
}
}
if (d->chip->runtime_pm)
@ -194,8 +214,30 @@ static void regmap_irq_enable(struct irq_data *data)
struct regmap_irq_chip_data *d = irq_data_get_irq_chip_data(data);
struct regmap *map = d->map;
const struct regmap_irq *irq_data = irq_to_regmap_irq(d, data->hwirq);
unsigned int mask, type;
d->mask_buf[irq_data->reg_offset / map->reg_stride] &= ~irq_data->mask;
type = irq_data->type.type_falling_val | irq_data->type.type_rising_val;
/*
* The type_in_mask flag means that the underlying hardware uses
* separate mask bits for rising and falling edge interrupts, but
* we want to make them into a single virtual interrupt with
* configurable edge.
*
* If the interrupt we're enabling defines the falling or rising
* masks then instead of using the regular mask bits for this
* interrupt, use the value previously written to the type buffer
* at the corresponding offset in regmap_irq_set_type().
*/
if (d->chip->type_in_mask && type)
mask = d->type_buf[irq_data->reg_offset / map->reg_stride];
else
mask = irq_data->mask;
if (d->chip->clear_on_unmask)
d->clear_status = true;
d->mask_buf[irq_data->reg_offset / map->reg_stride] &= ~mask;
}
static void regmap_irq_disable(struct irq_data *data)
@ -212,27 +254,42 @@ static int regmap_irq_set_type(struct irq_data *data, unsigned int type)
struct regmap_irq_chip_data *d = irq_data_get_irq_chip_data(data);
struct regmap *map = d->map;
const struct regmap_irq *irq_data = irq_to_regmap_irq(d, data->hwirq);
int reg = irq_data->type_reg_offset / map->reg_stride;
int reg;
const struct regmap_irq_type *t = &irq_data->type;
if (!(irq_data->type_rising_mask | irq_data->type_falling_mask))
return 0;
if ((t->types_supported & type) != type)
return -ENOTSUPP;
d->type_buf[reg] &= ~(irq_data->type_falling_mask |
irq_data->type_rising_mask);
reg = t->type_reg_offset / map->reg_stride;
if (t->type_reg_mask)
d->type_buf[reg] &= ~t->type_reg_mask;
else
d->type_buf[reg] &= ~(t->type_falling_val |
t->type_rising_val |
t->type_level_low_val |
t->type_level_high_val);
switch (type) {
case IRQ_TYPE_EDGE_FALLING:
d->type_buf[reg] |= irq_data->type_falling_mask;
d->type_buf[reg] |= t->type_falling_val;
break;
case IRQ_TYPE_EDGE_RISING:
d->type_buf[reg] |= irq_data->type_rising_mask;
d->type_buf[reg] |= t->type_rising_val;
break;
case IRQ_TYPE_EDGE_BOTH:
d->type_buf[reg] |= (irq_data->type_falling_mask |
irq_data->type_rising_mask);
d->type_buf[reg] |= (t->type_falling_val |
t->type_rising_val);
break;
case IRQ_TYPE_LEVEL_HIGH:
d->type_buf[reg] |= t->type_level_high_val;
break;
case IRQ_TYPE_LEVEL_LOW:
d->type_buf[reg] |= t->type_level_low_val;
break;
default:
return -EINVAL;
}
@ -430,12 +487,16 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
struct regmap_irq_chip_data *d;
int i;
int ret = -ENOMEM;
int num_type_reg;
u32 reg;
u32 unmask_offset;
if (chip->num_regs <= 0)
return -EINVAL;
if (chip->clear_on_unmask && (chip->ack_base || chip->use_ack))
return -EINVAL;
for (i = 0; i < chip->num_irqs; i++) {
if (chip->irqs[i].reg_offset % map->reg_stride)
return -EINVAL;
@ -479,13 +540,14 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
goto err_alloc;
}
if (chip->num_type_reg) {
d->type_buf_def = kcalloc(chip->num_type_reg,
sizeof(unsigned int), GFP_KERNEL);
num_type_reg = chip->type_in_mask ? chip->num_regs : chip->num_type_reg;
if (num_type_reg) {
d->type_buf_def = kcalloc(num_type_reg,
sizeof(unsigned int), GFP_KERNEL);
if (!d->type_buf_def)
goto err_alloc;
d->type_buf = kcalloc(chip->num_type_reg, sizeof(unsigned int),
d->type_buf = kcalloc(num_type_reg, sizeof(unsigned int),
GFP_KERNEL);
if (!d->type_buf)
goto err_alloc;
@ -600,27 +662,21 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
}
}
if (chip->num_type_reg) {
for (i = 0; i < chip->num_irqs; i++) {
reg = chip->irqs[i].type_reg_offset / map->reg_stride;
d->type_buf_def[reg] |= chip->irqs[i].type_rising_mask |
chip->irqs[i].type_falling_mask;
}
if (chip->num_type_reg && !chip->type_in_mask) {
for (i = 0; i < chip->num_type_reg; ++i) {
if (!d->type_buf_def[i])
continue;
reg = chip->type_base +
(i * map->reg_stride * d->type_reg_stride);
if (chip->type_invert)
ret = regmap_irq_update_bits(d, reg,
d->type_buf_def[i], 0xFF);
else
ret = regmap_irq_update_bits(d, reg,
d->type_buf_def[i], 0x0);
if (ret != 0) {
dev_err(map->dev,
"Failed to set type in 0x%x: %x\n",
ret = regmap_read(map, reg, &d->type_buf_def[i]);
if (d->chip->type_invert)
d->type_buf_def[i] = ~d->type_buf_def[i];
if (ret) {
dev_err(map->dev, "Failed to get type defaults at 0x%x: %d\n",
reg, ret);
goto err_alloc;
}