TACH_ASPEED_CLK_DIV_T_MASK
reg_val = FIELD_GET(TACH_ASPEED_CLK_DIV_T_MASK, reg_val);
reg_val &= ~TACH_ASPEED_CLK_DIV_T_MASK;
reg_val |= FIELD_PREP(TACH_ASPEED_CLK_DIV_T_MASK,
TACH_ASPEED_IO_EDGE_MASK | TACH_ASPEED_CLK_DIV_T_MASK |
FIELD_PREP(TACH_ASPEED_CLK_DIV_T_MASK,