shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-06 02:50:49 +09:00
Code Issues Packages Projects Releases Wiki Activity

ODROID-M1: mfd/rk808: add <low|shutdown>_voltage_threadhold

Browse Source 
Add new property to set system low voltage and shutdown voltage to the
register SYS_CFG0.

	&rk809 {
		...
		low_voltage_threshold = <2800>;
		shutdown_voltage_threshold = <2700>;
		...
	}

Signed-off-by: Dongjin Kim <tobetter@gmail.com>
Change-Id: I9c1a850485e93af9ea977ad35a70656e09a449a0
This commit is contained in:
Dongjin Kim
2025-03-27 18:00:39 +09:00
parent b56b831c9b
commit 08f5f62893
1 changed files with 39 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
drivers/mfd/rk808.c
View File

@@ -1067,6 +1067,8 @@ static void rk817_of_property_prepare(struct rk808 *rk808, struct device *dev)
u32 inner;
int ret, func, msk, val;
struct device_node *np = dev->of_node;
int low_voltage_threshold;
int shutdown_voltage_threshold;
ret = of_property_read_u32_index(np, "fb-inner-reg-idxs", 0, &inner);
if (!ret && inner == RK817_ID_DCDC3)
@@ -1101,6 +1103,43 @@ static void rk817_of_property_prepare(struct rk808 *rk808, struct device *dev)
ret = register_reboot_notifier(&rk817_reboot_data.reboot_notifier);
if (ret)
dev_err(dev, "failed to register reboot nb\n");
ret = device_property_read_u32(dev,
"low_voltage_threshold", &low_voltage_threshold);
if (ret < 0) {
low_voltage_threshold = 0;
dev_info(dev, "low_voltage_threshold missing!\n");
} else {
if ((low_voltage_threshold > 3500) ||
(low_voltage_threshold < 2800)) {
dev_err(dev, "low_voltage_threshold out [2800 3500]!\n");
low_voltage_threshold = 2800;
}
}
if (low_voltage_threshold) {
regmap_update_bits(rk808->regmap, RK817_SYS_CFG(0), BIT(3), BIT(3));
regmap_update_bits(rk808->regmap, RK817_SYS_CFG(0), 0x07,
(low_voltage_threshold - 2800) / 100);
}
ret = device_property_read_u32(dev,
"shutdown_voltage_threshold", &shutdown_voltage_threshold);
if (ret < 0) {
shutdown_voltage_threshold = 0;
dev_info(dev, "shutdown_voltage_threshold missing!\n");
}
if ((shutdown_voltage_threshold > 3400) ||
(shutdown_voltage_threshold < 2700)) {
dev_err(dev, "shutdown_voltage_threshold out [2700 3400]!\n");
shutdown_voltage_threshold = 2700;
}
if (shutdown_voltage_threshold) {
regmap_update_bits(rk808->regmap, RK817_SYS_CFG(0), 0x7 << 4,
((shutdown_voltage_threshold - 2700) / 100) << 4);
}
}
static struct kobject *rk8xx_kobj;