diff options
Diffstat (limited to 'drivers/scsi/isci/host.c')
| -rw-r--r-- | drivers/scsi/isci/host.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/scsi/isci/host.c b/drivers/scsi/isci/host.c index 418391b1c361..508aa8ce25b4 100644 --- a/drivers/scsi/isci/host.c +++ b/drivers/scsi/isci/host.c @@ -1491,6 +1491,15 @@ sci_controller_set_interrupt_coalescence(struct isci_host *ihost, static void sci_controller_ready_state_enter(struct sci_base_state_machine *sm) { struct isci_host *ihost = container_of(sm, typeof(*ihost), sm); + u32 val; + + /* enable clock gating for power control of the scu unit */ + val = readl(&ihost->smu_registers->clock_gating_control); + val &= ~(SMU_CGUCR_GEN_BIT(REGCLK_ENABLE) | + SMU_CGUCR_GEN_BIT(TXCLK_ENABLE) | + SMU_CGUCR_GEN_BIT(XCLK_ENABLE)); + val |= SMU_CGUCR_GEN_BIT(IDLE_ENABLE); + writel(val, &ihost->smu_registers->clock_gating_control); /* set the default interrupt coalescence number and timeout value. */ sci_controller_set_interrupt_coalescence(ihost, 0, 0); |