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drivers: gpio: altera_pio add spinlock

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Add spinlock for write access to register

Signed-off-by: Goh Shun Jing <shun.jing.goh@intel.com>
This commit is contained in:
Goh Shun Jing 2023-08-04 19:11:04 +08:00 • committed by Carles Cufí
commit 029e756009
1 changed files with 29 additions and 2 deletions
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31
drivers/gpio/gpio_altera_pio.c
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@ -111,6 +111,10 @@ static int gpio_altera_port_get_raw(const struct device *dev, uint32_t *value)
addr = reg_base + ALTERA_AVALON_PIO_DATA_OFFSET;
if (value == NULL) {
return -EINVAL;
}
*value = sys_read32((addr));
return 0;
@ -119,10 +123,12 @@ static int gpio_altera_port_get_raw(const struct device *dev, uint32_t *value)
static int gpio_altera_port_set_bits_raw(const struct device *dev, gpio_port_pins_t mask)
{
const struct gpio_altera_config *cfg = dev->config;
const int outset = cfg->outset;
struct gpio_altera_data * const data = dev->data;
const uint8_t outset = cfg->outset;
const int port_pin_mask = cfg->common.port_pin_mask;
uintptr_t reg_base = cfg->reg_base;
uint32_t addr;
k_spinlock_key_t key;
if ((port_pin_mask & mask) == 0) {
return -EINVAL;
@ -132,6 +138,8 @@ static int gpio_altera_port_set_bits_raw(const struct device *dev, gpio_port_pin
return -EINVAL;
}
key = k_spin_lock(&data->lock);
if (outset) {
addr = reg_base + ALTERA_AVALON_PIO_SET_BITS;
sys_write32(mask, addr);
@ -140,16 +148,20 @@ static int gpio_altera_port_set_bits_raw(const struct device *dev, gpio_port_pin
sys_set_bits(addr, mask);
}
k_spin_unlock(&data->lock, key);
return 0;
}
static int gpio_altera_port_clear_bits_raw(const struct device *dev, gpio_port_pins_t mask)
{
const struct gpio_altera_config *cfg = dev->config;
const int outclear = cfg->outclear;
struct gpio_altera_data * const data = dev->data;
const uint8_t outclear = cfg->outclear;
const int port_pin_mask = cfg->common.port_pin_mask;
uintptr_t reg_base = cfg->reg_base;
uint32_t addr;
k_spinlock_key_t key;
/* Check if mask range within 32 */
if ((port_pin_mask & mask) == 0) {
@ -160,6 +172,8 @@ static int gpio_altera_port_clear_bits_raw(const struct device *dev, gpio_port_p
return -EINVAL;
}
key = k_spin_lock(&data->lock);
if (outclear) {
addr = reg_base + ALTERA_AVALON_PIO_CLEAR_BITS;
sys_write32(mask, addr);
@ -168,6 +182,8 @@ static int gpio_altera_port_clear_bits_raw(const struct device *dev, gpio_port_p
sys_clear_bits(addr, mask);
}
k_spin_unlock(&data->lock, key);
return 0;
}
@ -189,9 +205,11 @@ static int gpio_altera_pin_interrupt_configure(const struct device *dev,
ARG_UNUSED(trig);
const struct gpio_altera_config *cfg = dev->config;
struct gpio_altera_data * const data = dev->data;
uintptr_t reg_base = cfg->reg_base;
const int port_pin_mask = cfg->common.port_pin_mask;
uint32_t addr;
k_spinlock_key_t key;
/* Check if pin number is within range */
if ((port_pin_mask & BIT(pin)) == 0) {
@ -204,6 +222,8 @@ static int gpio_altera_pin_interrupt_configure(const struct device *dev,
addr = reg_base + ALTERA_AVALON_PIO_IRQ_OFFSET;
key = k_spin_lock(&data->lock);
switch (mode) {
case GPIO_INT_MODE_DISABLED:
/* Disable interrupt of pin */
@ -220,6 +240,8 @@ static int gpio_altera_pin_interrupt_configure(const struct device *dev,
return -EINVAL;
}
k_spin_unlock(&data->lock, key);
return 0;
}
@ -240,13 +262,18 @@ static void gpio_altera_irq_handler(const struct device *dev)
uintptr_t reg_base = cfg->reg_base;
uint32_t port_value;
uint32_t addr;
k_spinlock_key_t key;
addr = reg_base + ALTERA_AVALON_PIO_IRQ_OFFSET;
key = k_spin_lock(&data->lock);
port_value = sys_read32(addr);
sys_clear_bits(addr, port_value);
k_spin_unlock(&data->lock, key);
/* Call the corresponding callback registered for the pin */
gpio_fire_callbacks(&data->cb, dev, port_value);
}