107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
/*
|
|
* Copyright (c) 2006-2022, RT-Thread Development Team
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Change Logs:
|
|
* Date Author Notes
|
|
* 2022-12-06 GuEe-GUI first version
|
|
*/
|
|
|
|
#include "dev_spi_dm.h"
|
|
|
|
#define DBG_TAG "spi.dm"
|
|
#define DBG_LVL DBG_INFO
|
|
#include <rtdbg.h>
|
|
|
|
#ifdef RT_USING_OFW
|
|
static void ofw_parse_delay(struct rt_ofw_node *np, struct rt_spi_delay *delay,
|
|
const char *prop)
|
|
{
|
|
rt_uint32_t value;
|
|
|
|
if (!rt_ofw_prop_read_u32(np, prop, &value))
|
|
{
|
|
if (value > RT_UINT16_MAX)
|
|
{
|
|
delay->value = RT_DIV_ROUND_UP(value, 1000);
|
|
delay->unit = RT_SPI_DELAY_UNIT_USECS;
|
|
}
|
|
else
|
|
{
|
|
delay->value = value;
|
|
delay->unit = RT_SPI_DELAY_UNIT_NSECS;
|
|
}
|
|
}
|
|
}
|
|
|
|
rt_err_t spi_device_ofw_parse(struct rt_spi_device *spi_dev)
|
|
{
|
|
rt_err_t err;
|
|
rt_uint32_t value;
|
|
struct rt_spi_bus *spi_bus = spi_dev->bus;
|
|
struct rt_ofw_node *np = spi_dev->parent.ofw_node;
|
|
struct rt_spi_configuration *conf = &spi_dev->config;
|
|
|
|
if (rt_ofw_prop_read_bool(np, "spi-cpha"))
|
|
{
|
|
conf->mode |= RT_SPI_CPHA;
|
|
}
|
|
if (rt_ofw_prop_read_bool(np, "spi-cpol"))
|
|
{
|
|
conf->mode |= RT_SPI_CPOL;
|
|
}
|
|
if (rt_ofw_prop_read_bool(np, "spi-3wire"))
|
|
{
|
|
conf->mode |= RT_SPI_3WIRE;
|
|
}
|
|
if (rt_ofw_prop_read_bool(np, "spi-lsb-first"))
|
|
{
|
|
conf->mode |= RT_SPI_LSB;
|
|
}
|
|
if (rt_ofw_prop_read_bool(np, "spi-cs-high"))
|
|
{
|
|
conf->mode |= RT_SPI_CS_HIGH;
|
|
}
|
|
|
|
value = 1;
|
|
rt_ofw_prop_read_u32(np, "spi-tx-bus-width", &value);
|
|
conf->data_width_tx = value;
|
|
|
|
value = 1;
|
|
rt_ofw_prop_read_u32(np, "spi-rx-bus-width", &value);
|
|
conf->data_width_rx = value;
|
|
|
|
if (spi_bus->slave)
|
|
{
|
|
if (!rt_ofw_node_tag_equ(np, "slave"))
|
|
{
|
|
LOG_E("Invalid SPI device = %s", rt_ofw_node_full_name(np));
|
|
|
|
return -RT_EINVAL;
|
|
}
|
|
|
|
return RT_EOK;
|
|
}
|
|
|
|
if ((err = rt_ofw_prop_read_u32(np, "reg", &value)))
|
|
{
|
|
LOG_E("Find 'reg' failed");
|
|
|
|
return err;
|
|
}
|
|
spi_dev->chip_select = value;
|
|
|
|
if (!rt_ofw_prop_read_u32(np, "spi-max-frequency", &value))
|
|
{
|
|
conf->max_hz = value;
|
|
}
|
|
|
|
ofw_parse_delay(np, &spi_dev->cs_setup, "spi-cs-setup-delay-ns");
|
|
ofw_parse_delay(np, &spi_dev->cs_hold, "spi-cs-hold-delay-ns");
|
|
ofw_parse_delay(np, &spi_dev->cs_inactive, "spi-cs-inactive-delay-ns");
|
|
|
|
return RT_EOK;
|
|
}
|
|
#endif /* RT_USING_OFW */
|