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uart: qmsi: Adds device suspend/resume to uart_qmsi device

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This adds some basic suspend/resume support in the uart_qmsi
driver. This is part of a change to enable device suspend/resume
and deep sleep support in sample PM application.

Jira: ZEP-512
Change-Id: I38cfbfb352d0027b7beaadebedbc10002dade50a
Signed-off-by: Ramesh Thomas <ramesh.thomas@intel.com>
This commit is contained in:
Ramesh Thomas 2016-07-14 11:48:21 -07:00
parent 1171348038
commit 53bc73a438
1 changed files with 47 additions and 5 deletions
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52
drivers/serial/uart_qmsi.c
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@ -20,6 +20,7 @@
#include <ioapic.h>
#endif
#include <uart.h>
#include <power.h>
#include "qm_uart.h"
#include "qm_isr.h"
@ -49,12 +50,46 @@ struct uart_qmsi_config_info {
#endif /* CONFIG_UART_INTERRUPT_DRIVEN */
};
static int uart_qmsi_init(struct device *dev);
#ifndef CONFIG_DEVICE_POWER_MANAGEMENT
struct uart_qmsi_drv_data {
uart_irq_callback_t user_cb;
uint8_t iir_cache;
};
static int uart_qmsi_init(struct device *dev);
#define uart_qmsi_pm_save_config(dev, cfg) do { } while ((0))
#else
struct uart_qmsi_drv_data {
uart_irq_callback_t user_cb;
uint8_t iir_cache;
qm_uart_config_t cfg_save;
};
static inline
void uart_qmsi_pm_save_config(struct device *dev, qm_uart_config_t *cfg)
{
struct uart_qmsi_drv_data *drv_data = dev->driver_data;
drv_data->cfg_save = *cfg;
}
static int uart_resume_device(struct device *dev, int pm_policy)
{
if (pm_policy == SYS_PM_DEEP_SLEEP) {
struct uart_qmsi_config_info *config = dev->config->config_info;
struct uart_qmsi_drv_data *drv_data = dev->driver_data;
clk_periph_enable(config->clock_gate);
qm_uart_set_config(config->instance,
&drv_data->cfg_save);
}
return 0;
}
#endif
#ifdef CONFIG_UART_QMSI_0
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
@ -79,8 +114,11 @@ static struct uart_qmsi_config_info config_info_0 = {
static struct uart_qmsi_drv_data drv_data_0;
DEVICE_INIT(uart_0, CONFIG_UART_QMSI_0_NAME, uart_qmsi_init, &drv_data_0,
&config_info_0, PRIMARY, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);
DEFINE_DEVICE_PM_OPS(uart, device_pm_nop, uart_resume_device);
DEVICE_INIT_PM(uart_0, CONFIG_UART_QMSI_0_NAME, &uart_qmsi_init,
DEVICE_PM_OPS_GET(uart), &drv_data_0, &config_info_0, PRIMARY,
CONFIG_KERNEL_INIT_PRIORITY_DEVICE);
#endif /* CONFIG_UART_QMSI_0 */
#ifdef CONFIG_UART_QMSI_1
@ -106,8 +144,9 @@ static struct uart_qmsi_config_info config_info_1 = {
static struct uart_qmsi_drv_data drv_data_1;
DEVICE_INIT(uart_1, CONFIG_UART_QMSI_1_NAME, uart_qmsi_init, &drv_data_1,
&config_info_1, PRIMARY, CONFIG_KERNEL_INIT_PRIORITY_DEVICE);
DEVICE_INIT_PM(uart_1, CONFIG_UART_QMSI_1_NAME, &uart_qmsi_init,
DEVICE_PM_OPS_GET(uart), &drv_data_1, &config_info_1, PRIMARY,
CONFIG_KERNEL_INIT_PRIORITY_DEVICE);
#endif /* CONFIG_UART_QMSI_1 */
static int uart_qmsi_poll_in(struct device *dev, unsigned char *data)
@ -326,6 +365,7 @@ static int uart_qmsi_line_ctrl_set(struct device *dev, uint32_t ctrl, uint32_t v
cfg.hw_fc = QM_UART[instance]->mcr & QM_UART_MCR_AFCE;
cfg.int_en = false;
qm_uart_set_config(instance, &cfg);
uart_qmsi_pm_save_config(dev, &cfg);
break;
default:
return -ENODEV;
@ -387,6 +427,8 @@ static int uart_qmsi_init(struct device *dev)
qm_uart_set_config(config->instance, &cfg);
uart_qmsi_pm_save_config(dev, &cfg);
#ifdef CONFIG_UART_INTERRUPT_DRIVEN
config->irq_config_func(dev);
#endif /* CONFIG_UART_INTERRUPT_DRIVEN */