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soc: rockchip: pm_test: Add support for dvfs_table_scan

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Change-Id: Ie03ed876661286d19b57029f32fe5365c0b60415
Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
This commit is contained in:
Finley Xiao
2018-07-18 09:32:08 +08:00
committed by Tao Huang
parent 9d76b2eb09
commit 106471a6e4
1 changed files with 96 additions and 0 deletions
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96
drivers/soc/rockchip/pm_test.c
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@@ -29,6 +29,7 @@
#define CLK_NR_CLKS 550
static int cpu_usage_run;
static struct file *wdt_filp;
static DEFINE_PER_CPU(struct work_struct, work_cpu_usage);
static DEFINE_PER_CPU(struct workqueue_struct *, workqueue_cpu_usage);
@@ -583,10 +584,105 @@ static ssize_t cpu_usage_store(struct kobject *kobj,
return n;
}
static ssize_t dvfs_table_scan_show(struct kobject *kobj,
struct kobj_attribute *attr,
char *buf)
{
char *str = buf;
str += sprintf(str, "start: start scan dvfs table\n");
str += sprintf(str, "alive: send alive\n");
str += sprintf(str, "stop: stop scan dvfs table\n");
if (str != buf)
*(str - 1) = '\n';
return (str - buf);
}
static int wdt_start(void)
{
if (wdt_filp)
return 0;
wdt_filp = filp_open("/dev/watchdog", O_WRONLY, 0);
if (IS_ERR(wdt_filp)) {
pr_err("%s: failed to open /dev/watchdog\n", __func__);
wdt_filp = NULL;
return -EINVAL;
}
return 0;
}
static int wdt_keepalive(void)
{
mm_segment_t old_fs;
if (!wdt_filp) {
pr_err("%s: /dev/watchdog filp error\n", __func__);
return -EINVAL;
}
old_fs = get_fs();
set_fs(KERNEL_DS);
if (wdt_filp->f_op->write(wdt_filp, "\0", 1, &wdt_filp->f_pos) <= 0)
pr_err("%s: write 0 error\n", __func__);
set_fs(old_fs);
return 0;
}
static int wdt_stop(void)
{
mm_segment_t old_fs;
if (!wdt_filp) {
pr_err("%s: /dev/watchdog filp error\n", __func__);
return -EINVAL;
}
old_fs = get_fs();
set_fs(KERNEL_DS);
if (wdt_filp->f_op->write(wdt_filp, "V", 1, &wdt_filp->f_pos) <= 0)
pr_err("%s: write V error\n", __func__);
set_fs(old_fs);
filp_close(wdt_filp, NULL);
return 0;
}
static ssize_t dvfs_table_scan_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t n)
{
char cmd[20];
int ret;
ret = sscanf(buf, "%s", cmd);
if (ret != 1)
return -EINVAL;
if (!strcmp(cmd, "start")) {
ret = wdt_start();
if (ret)
return ret;
} else if (!strcmp(cmd, "alive")) {
ret = wdt_keepalive();
if (ret)
return ret;
} else if (!strcmp(cmd, "stop")) {
ret = wdt_stop();
if (ret)
return ret;
}
return n;
}
static struct pm_attribute pm_attrs[] = {
__ATTR(clk_rate, 0644, clk_rate_show, clk_rate_store),
__ATTR(clk_volt, 0644, clk_volt_show, clk_volt_store),
__ATTR(cpu_usage, 0644, cpu_usage_show, cpu_usage_store),
__ATTR(dvfs_table_scan, 0644, dvfs_table_scan_show,
dvfs_table_scan_store),
};
static int __init pm_test_init(void)