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drivers: serial: pl011: Add fifo enable configuration #79474

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Merged
merged 1 commit into from
Mar 7, 2025
Merged

drivers: serial: pl011: Add fifo enable configuration #79474

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11 changes: 9 additions & 2 deletions drivers/serial/uart_pl011.c
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Original file line number Diff line number Diff line change
Expand Up @@ -61,6 +61,7 @@ struct pl011_config {
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
uart_irq_config_func_t irq_config_func;
#endif
bool fifo_disable;
int (*clk_enable_func)(const struct device *dev, uint32_t clk);
int (*pwr_on_func)(void);
};
Expand Down Expand Up @@ -205,6 +206,7 @@ static int pl011_runtime_configure_internal(const struct device *dev,
const struct uart_config *cfg,
bool disable)
{
const struct pl011_config *config = dev->config;
struct pl011_data *data = dev->data;
uint32_t lcrh;
int ret = -ENOTSUP;
Expand Down Expand Up @@ -286,7 +288,9 @@ static int pl011_runtime_configure_internal(const struct device *dev,

enable:
if (disable) {
pl011_enable_fifo(dev);
if (!config->fifo_disable) {
pl011_enable_fifo(dev);
}
pl011_enable(dev);
}

Expand Down Expand Up @@ -527,7 +531,9 @@ static int pl011_init(const struct device *dev)
| FIELD_PREP(PL011_IFLS_RXIFLSEL_M, RXIFLSEL_1_2_FULL);

/* Enabling the FIFOs */
pl011_enable_fifo(dev);
if (!config->fifo_disable) {
pl011_enable_fifo(dev);
}
}
/* initialize all IRQs as masked */
get_uart(dev)->imsc = 0U;
Expand Down Expand Up @@ -648,6 +654,7 @@ void pl011_isr(const struct device *dev)
CLOCK_INIT(n) \
PINCTRL_INIT(n) \
.irq_config_func = pl011_irq_config_func_##n, \
.fifo_disable = DT_INST_PROP(n, fifo_disable), \
.clk_enable_func = COMPAT_SPECIFIC_CLK_ENABLE_FUNC(n), \
.pwr_on_func = COMPAT_SPECIFIC_PWR_ON_FUNC(n), \
};
Expand Down
4 changes: 4 additions & 0 deletions dts/bindings/serial/arm,pl011.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -10,3 +10,7 @@ properties:

interrupts:
required: true

fifo-disable:
type: boolean
description: Disable the UART FIFO
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