diff options
| author | Razmik Karapetyan <razmik@synopsys.com> | 2018-01-24 16:40:29 +0300 |
|---|---|---|
| committer | Felipe Balbi <felipe.balbi@linux.intel.com> | 2018-03-13 11:47:46 +0300 |
| commit | 66e77a24a8c36ff83f0a12f44d23d8141e82fa3b (patch) | |
| tree | 48d32823c0d551c384da14017bd9c58a24a693df /drivers/usb/dwc2/core.h | |
| parent | 42c6a25235677ad3568af080b0569e05a9f849fc (diff) | |
| download | linux-66e77a24a8c36ff83f0a12f44d23d8141e82fa3b.tar.xz | |
usb: dwc2: Add ACG support to the driver
Added function for supporting Active Clock Gating functionality
in the driver.
PCGCCTL1 (Power and Clock Control) register will be used
for controlling the core`s active clock gating feature, and
the previously reserved 12th bit in GHWCFG4 now indicates that the
controller supports the Dynamic Power Reduction (Active Clock Gating)
during no traffic scenarios such as L0, idle, resume and suspend
states.
dwc2_enable_acg() function sets GATEEN bit in PCGCCTL1 register
and enables ACG, if it supported.
According to ACG functional specification, enabling of ACG feature
in host mode done in host initialization, before turning Vbus on,
specifically in dwc2_core_host_init function.
Enabling of ACG feature in device mode done in device initialization,
before clearing the SftDiscon bit in DCTL.
This bit was cleared in dwc2_hsotg_core_connect() function.So
dwc2_enable_acg() called before dwc2_core_connect() calls.
Signed-off-by: Razmik Karapetyan <razmik@synopsys.com>
Signed-off-by: Grigor Tovmasyan <tovmasya@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/dwc2/core.h')
| -rw-r--r-- | drivers/usb/dwc2/core.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h index db5c02bd4420..a7033b9f20f5 100644 --- a/drivers/usb/dwc2/core.h +++ b/drivers/usb/dwc2/core.h @@ -479,6 +479,7 @@ struct dwc2_core_params { bool enable_dynamic_fifo; bool en_multiple_tx_fifo; bool i2c_enable; + bool acg_enable; bool ulpi_fs_ls; bool ts_dline; bool reload_ctl; @@ -587,6 +588,7 @@ struct dwc2_hw_params { unsigned hs_phy_type:2; unsigned fs_phy_type:2; unsigned i2c_enable:1; + unsigned acg_enable:1; unsigned num_dev_ep:4; unsigned num_dev_in_eps : 4; unsigned num_dev_perio_in_ep:4; @@ -1115,6 +1117,8 @@ void dwc2_flush_rx_fifo(struct dwc2_hsotg *hsotg); void dwc2_enable_global_interrupts(struct dwc2_hsotg *hcd); void dwc2_disable_global_interrupts(struct dwc2_hsotg *hcd); +void dwc2_enable_acg(struct dwc2_hsotg *hsotg); + /* This function should be called on every hardware interrupt. */ irqreturn_t dwc2_handle_common_intr(int irq, void *dev); |