diff options
Diffstat (limited to 'drivers/misc/aspeed-lpc-ctrl.c')
| -rw-r--r-- | drivers/misc/aspeed-lpc-ctrl.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/misc/aspeed-lpc-ctrl.c b/drivers/misc/aspeed-lpc-ctrl.c index 1827b7aa6674..a024f8042259 100644 --- a/drivers/misc/aspeed-lpc-ctrl.c +++ b/drivers/misc/aspeed-lpc-ctrl.c @@ -21,6 +21,10 @@ #define DEVICE_NAME "aspeed-lpc-ctrl" +#define HICR5 0x0 +#define HICR5_ENL2H BIT(8) +#define HICR5_ENFWH BIT(10) + #define HICR7 0x8 #define HICR8 0xc @@ -155,8 +159,18 @@ static long aspeed_lpc_ctrl_ioctl(struct file *file, unsigned int cmd, if (rc) return rc; - return regmap_write(lpc_ctrl->regmap, HICR8, - (~(map.size - 1)) | ((map.size >> 16) - 1)); + rc = regmap_write(lpc_ctrl->regmap, HICR8, + (~(map.size - 1)) | ((map.size >> 16) - 1)); + if (rc) + return rc; + + /* + * Enable LPC FHW cycles. This is required for the host to + * access the regions specified. + */ + return regmap_update_bits(lpc_ctrl->regmap, HICR5, + HICR5_ENFWH | HICR5_ENL2H, + HICR5_ENFWH | HICR5_ENL2H); } return -EINVAL; |