diff options
| -rw-r--r-- | drivers/scsi/isci/host.c | 9 | ||||
| -rw-r--r-- | drivers/scsi/isci/registers.h | 27 |
2 files changed, 34 insertions, 2 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); diff --git a/drivers/scsi/isci/registers.h b/drivers/scsi/isci/registers.h index eaa541afc755..7eb0ccd45fe6 100644 --- a/drivers/scsi/isci/registers.h +++ b/drivers/scsi/isci/registers.h @@ -370,6 +370,27 @@ struct scu_iit_entry { >> SMU_DEVICE_CONTEXT_CAPACITY_MAX_RNC_SHIFT \ ) +/* ***************************************************************************** */ +#define SMU_CLOCK_GATING_CONTROL_IDLE_ENABLE_SHIFT (0) +#define SMU_CLOCK_GATING_CONTROL_IDLE_ENABLE_MASK (0x00000001) +#define SMU_CLOCK_GATING_CONTROL_XCLK_ENABLE_SHIFT (1) +#define SMU_CLOCK_GATING_CONTROL_XCLK_ENABLE_MASK (0x00000002) +#define SMU_CLOCK_GATING_CONTROL_TXCLK_ENABLE_SHIFT (2) +#define SMU_CLOCK_GATING_CONTROL_TXCLK_ENABLE_MASK (0x00000004) +#define SMU_CLOCK_GATING_CONTROL_REGCLK_ENABLE_SHIFT (3) +#define SMU_CLOCK_GATING_CONTROL_REGCLK_ENABLE_MASK (0x00000008) +#define SMU_CLOCK_GATING_CONTROL_IDLE_TIMEOUT_SHIFT (16) +#define SMU_CLOCK_GATING_CONTROL_IDLE_TIMEOUT_MASK (0x000F0000) +#define SMU_CLOCK_GATING_CONTROL_FORCE_IDLE_SHIFT (31) +#define SMU_CLOCK_GATING_CONTROL_FORCE_IDLE_MASK (0x80000000) +#define SMU_CLOCK_GATING_CONTROL_RESERVED_MASK (0x7FF0FFF0) + +#define SMU_CGUCR_GEN_VAL(name, value) \ + SCU_GEN_VALUE(SMU_CLOCK_GATING_CONTROL_##name, value) + +#define SMU_CGUCR_GEN_BIT(name) \ + SCU_GEN_BIT(SMU_CLOCK_GATING_CONTROL_##name) + /* -------------------------------------------------------------------------- */ #define SMU_CONTROL_STATUS_TASK_CONTEXT_RANGE_ENABLE_SHIFT (0) @@ -992,8 +1013,10 @@ struct smu_registers { u32 mmr_address_window; /* 0x00A4 SMDW */ u32 mmr_data_window; - u32 reserved_A8; - u32 reserved_AC; +/* 0x00A8 CGUCR */ + u32 clock_gating_control; +/* 0x00AC CGUPC */ + u32 clock_gating_performance; /* A whole bunch of reserved space */ u32 reserved_Bx[4]; u32 reserved_Cx[4]; |