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serial: 8250_dw: uart wake up

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Add wakeup-source to uart dts node to enable uart
wake up system when it receives data.

Change-Id: If4e82a4d3dbaca708209553dc3693089864c782f
Signed-off-by: Huibin Hong <huibin.hong@rock-chips.com>
This commit is contained in:
Huibin Hong
2019-01-15 19:46:01 +08:00
committed by Tao Huang
parent bcdc525901
commit 62d96185bd
1 changed files with 39 additions and 1 deletions
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40
drivers/tty/serial/8250/8250_dw.c
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@@ -49,6 +49,11 @@ struct dw8250_data {
struct work_struct clk_work;
struct reset_control *rst;
#ifdef CONFIG_ARCH_ROCKCHIP
int irq;
int irq_wake;
int enable_wakeup;
#endif
unsigned int skip_autocfg:1;
unsigned int uart_16550_compatible:1;
};
@@ -480,6 +485,9 @@ static int dw8250_probe(struct platform_device *pdev)
data->data.dma.fn = dw8250_fallback_dma_filter;
data->usr_reg = DW_UART_USR;
p->private_data = &data->data;
#ifdef CONFIG_ARCH_ROCKCHIP
data->irq = irq;
#endif
data->uart_16550_compatible = device_property_read_bool(dev,
"snps,uart-16550-compatible");
@@ -519,6 +527,13 @@ static int dw8250_probe(struct platform_device *pdev)
data->msr_mask_off |= UART_MSR_TERI;
}
#ifdef CONFIG_ARCH_ROCKCHIP
if (device_property_read_bool(p->dev, "wakeup-source"))
data->enable_wakeup = 1;
else
data->enable_wakeup = 0;
#endif
/* Always ask for fixed clock rate from a property. */
device_property_read_u32(dev, "clock-frequency", &p->uartclk);
@@ -599,7 +614,10 @@ static int dw8250_probe(struct platform_device *pdev)
else
queue_work(system_unbound_wq, &data->clk_work);
}
#ifdef CONFIG_ARCH_ROCKCHIP
if (data->enable_wakeup)
device_init_wakeup(&pdev->dev, true);
#endif
platform_set_drvdata(pdev, data);
pm_runtime_set_active(dev);
@@ -642,6 +660,10 @@ static int dw8250_remove(struct platform_device *pdev)
pm_runtime_disable(dev);
pm_runtime_put_noidle(dev);
#ifdef CONFIG_ARCH_ROCKCHIP
if (data->enable_wakeup)
device_init_wakeup(&pdev->dev, false);
#endif
return 0;
}
@@ -652,6 +674,13 @@ static int dw8250_suspend(struct device *dev)
struct dw8250_data *data = dev_get_drvdata(dev);
serial8250_suspend_port(data->data.line);
#ifdef CONFIG_ARCH_ROCKCHIP
if (device_may_wakeup(dev)) {
if (!enable_irq_wake(data->irq))
data->irq_wake = 1;
return 0;
}
#endif
return 0;
}
@@ -661,6 +690,15 @@ static int dw8250_resume(struct device *dev)
struct dw8250_data *data = dev_get_drvdata(dev);
serial8250_resume_port(data->data.line);
#ifdef CONFIG_ARCH_ROCKCHIP
if (device_may_wakeup(dev)) {
if (data->irq_wake) {
disable_irq_wake(data->irq);
data->irq_wake = 0;
}
return 0;
}
#endif
return 0;
}