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power/avs: rockchip: add debugfs 'iodomain'

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This patch adds a 'iodomain' debug node.

Change-Id: I2f85d073aa59f87c20eb309f151e76a05a2f4bc1
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
This commit is contained in:
Jianqun Xu
2021-05-27 12:37:42 +08:00
committed by Tao Huang
parent 4f736fc5ad
commit a0b1f8c7ae
1 changed files with 38 additions and 0 deletions
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38
drivers/power/avs/rockchip-io-domain.c
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@@ -16,6 +16,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/debugfs.h>
#include <linux/err.h>
#include <linux/mfd/syscon.h>
#include <linux/of.h>
@@ -618,11 +619,37 @@ static const struct of_device_id rockchip_iodomain_match[] = {
};
MODULE_DEVICE_TABLE(of, rockchip_iodomain_match);
#ifdef CONFIG_DEBUG_FS
static ssize_t rockchip_iodomain_vol_read(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
char buf[256];
unsigned int len;
struct rockchip_iodomain_supply *supply = file->private_data;
struct regulator *reg = supply->reg;
if (reg)
len = snprintf(buf, sizeof(buf), "%d\n", regulator_get_voltage(reg));
else
len = snprintf(buf, sizeof(buf), "invalid regulator\n");
return simple_read_from_buffer(user_buf, count, ppos, buf, len);
}
static const struct file_operations rockchip_iodomain_vol_fops = {
.open = simple_open,
.read = rockchip_iodomain_vol_read,
};
#else
static const struct file_operations rockchip_iodomain_vol_fops = { };
#endif
static int rockchip_iodomain_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
const struct of_device_id *match;
struct rockchip_iodomain *iod;
struct dentry *debugfs_root;
struct device *parent;
int i, ret = 0;
@@ -657,10 +684,13 @@ static int rockchip_iodomain_probe(struct platform_device *pdev)
return PTR_ERR(iod->grf);
}
debugfs_root = debugfs_create_dir("iodomain", NULL);
for (i = 0; i < MAX_SUPPLIES; i++) {
const char *supply_name = iod->soc_data->supply_names[i];
struct rockchip_iodomain_supply *supply = &iod->supplies[i];
struct regulator *reg;
struct dentry *debugfs_supply;
int uV;
if (!supply_name)
@@ -717,6 +747,11 @@ static int rockchip_iodomain_probe(struct platform_device *pdev)
supply->reg = NULL;
goto unreg_notify;
}
debugfs_supply = debugfs_create_dir(supply_name, debugfs_root);
debugfs_create_file("voltage", 0444, debugfs_supply,
(void *)supply,
&rockchip_iodomain_vol_fops);
}
if (iod->soc_data->init)
@@ -732,6 +767,7 @@ unreg_notify:
regulator_unregister_notifier(io_supply->reg,
&io_supply->nb);
}
debugfs_remove_recursive(debugfs_root);
return ret;
}
@@ -749,6 +785,8 @@ static int rockchip_iodomain_remove(struct platform_device *pdev)
&io_supply->nb);
}
debugfs_remove_recursive(debugfs_lookup("iodomain", NULL));
return 0;
}