The EC of MSI laptops supports several features represented by a single
bit. Add ec_set_bit and ec_check_bit functions to operate on these bits.
Cc: Aakash Singh <mail@xxxxxxxxxxxxxxx>
Cc: Jose Angel Pastrana <japp0005@xxxxxxxxxxxx>
Signed-off-by: Nikita Kravets <teackot@xxxxxxxxx>
---
drivers/platform/x86/msi-ec.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/drivers/platform/x86/msi-ec.c b/drivers/platform/x86/msi-ec.c
index 09472b21e093..ae73dcf01d09 100644
--- a/drivers/platform/x86/msi-ec.c
+++ b/drivers/platform/x86/msi-ec.c
@@ -699,6 +699,34 @@ static int ec_read_seq(u8 addr, u8 *buf, u8 len)
return 0;
}
+static int ec_set_bit(u8 addr, u8 bit, bool value)
+{
+ int result;
+ u8 stored;
+
+ result = ec_read(addr, &stored);
+ if (result < 0)
+ return result;
+
+ stored ^= (-(u8) value ^ stored) & (1 << bit);
+
+ return ec_write(addr, stored);
+}
+
+static int ec_check_bit(u8 addr, u8 bit, bool *output)
+{
+ int result;
+ u8 stored;
+
+ result = ec_read(addr, &stored);
+ if (result < 0)
+ return result;
+
+ *output = (stored >> bit) & 1;
+
+ return 0;
+}
+
static int ec_get_firmware_version(u8 buf[MSI_EC_FW_VERSION_LENGTH + 1])
{
int result;
--
2.42.0
