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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-11-26 GuEe-GUI first version
*/
#include <rtthread.h>
#include <rtservice.h>
#include <rtdevice.h>
#define DBG_TAG "rtdm.pinctrl"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#ifdef RT_USING_OFW
static rt_err_t ofw_pin_ctrl_confs_apply(struct rt_ofw_node *np, int index)
{
rt_err_t err = -RT_EEMPTY;
rt_phandle phandle;
const fdt32_t *cell;
struct rt_ofw_prop *prop;
char pinctrl_n_name[sizeof("pinctrl-0")];
rt_sprintf(pinctrl_n_name, "pinctrl-%d", index);
index = 0;
rt_ofw_foreach_prop_u32(np, pinctrl_n_name, prop, cell, phandle)
{
struct rt_device_pin *pinctrl = RT_NULL;
struct rt_ofw_node *conf_np, *pinctrl_np;
conf_np = pinctrl_np = rt_ofw_find_node_by_phandle(phandle);
if (!conf_np)
{
err = -RT_EIO;
break;
}
/*
* We always assume the phandle in pinctrl-N is the pinctrl-device
* node's child node. If not, we need a better way to find it:
*
* / {
* serial@4600 {
* device_type = "serial";
* reg = <0x4600 0x100>;
* clock-frequency = <0>;
* pinctrl-names = "default";
* pinctrl-0 = <&uart_pin>;
* };
*
* i2c@4700 {
* reg = <0x4700 0x100>;
* pinctrl-names = "default";
* pinctrl-0 = <&i2c_pin_scl, &i2c_pin_sda>;
* };
*
* pinctrl: pinctrl {
*
* uart_pin {
* multi,pins =
* <0 PD0 1 &uart_rx_pull_up>,
* <0 PD1 1 &uart_tx_pull_up>;
* };
*
* i2c_pin_scl {
* single,pins = <0 PB1>;
* pull = <&i2c_pull_none_smt>;
* function = <1>;
* };
*
* i2c_pin_sda {
* single,pins = <0 PB2>;
* pull = <&i2c_pull_none_smt>;
* function = <1>;
* };
* };
* }
*/
rt_ofw_foreach_parent_node(pinctrl_np)
{
if (rt_ofw_prop_read_bool(pinctrl_np, "compatible"))
{
break;
}
}
if (pinctrl_np)
{
pinctrl = rt_ofw_data(pinctrl_np);
rt_ofw_node_put(pinctrl_np);
}
if (!pinctrl || !pinctrl->ops || !pinctrl->ops->pin_ctrl_confs_apply)
{
if (index)
{
err = -RT_EEMPTY;
}
else
{
err = -RT_ERROR;
}
rt_ofw_node_put(conf_np);
break;
}
err = pinctrl->ops->pin_ctrl_confs_apply(&pinctrl->parent, conf_np);
rt_ofw_node_put(conf_np);
if (err)
{
break;
}
++index;
}
return err;
}
static int ofw_pin_ctrl_confs_lookup(struct rt_ofw_node *np, const char *name)
{
return rt_ofw_prop_index_of_string(np, "pinctrl-names", name);
}
static rt_err_t ofw_pin_ctrl_confs_apply_by_name(struct rt_ofw_node *np, const char *name)
{
int index;
rt_err_t err;
index = ofw_pin_ctrl_confs_lookup(np, name);
if (index >= 0)
{
err = ofw_pin_ctrl_confs_apply(np, index);
}
else
{
err = -RT_EEMPTY;
}
return err;
}
#endif /* RT_USING_OFW */
rt_ssize_t rt_pin_ctrl_confs_lookup(struct rt_device *device, const char *name)
{
rt_ssize_t res;
if (device && name)
{
res = -RT_ENOSYS;
#ifdef RT_USING_OFW
if (device->ofw_node)
{
res = ofw_pin_ctrl_confs_lookup(device->ofw_node, name);
}
#endif /* RT_USING_OFW */
}
else
{
res = -RT_EINVAL;
}
return res;
}
rt_err_t rt_pin_ctrl_confs_apply(struct rt_device *device, int index)
{
rt_err_t err;
if (device && index >= 0)
{
err = -RT_ENOSYS;
#ifdef RT_USING_OFW
if (device->ofw_node)
{
err = ofw_pin_ctrl_confs_apply(device->ofw_node, index);
}
#endif /* RT_USING_OFW */
}
else
{
err = -RT_EINVAL;
}
return err;
}
rt_err_t rt_pin_ctrl_confs_apply_by_name(struct rt_device *device, const char *name)
{
rt_err_t err;
if (device)
{
if (!name)
{
name = "default";
}
err = -RT_ENOSYS;
#ifdef RT_USING_OFW
if (device->ofw_node)
{
err = ofw_pin_ctrl_confs_apply_by_name(device->ofw_node, name);
}
#endif /* RT_USING_OFW */
}
else
{
err = -RT_EINVAL;
}
return err;
}
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