| Message ID | 20190718102519.31855-3-daniel.baluta@nxp.com (mailing list archive) |
|---|---|
| State | Mainlined |
| Commit | 590b346b58badfe87cb13a64abdc8af25e907846 |
| Headers | show |
| Series | Add power domain range for MU13 side b / IRQSTR_DSP | expand |
> From: Daniel Baluta <daniel.baluta@nxp.com> > Sent: Thursday, July 18, 2019 6:25 PM > > LSIO subsystem contains 14 MU instances. > > 5 MUs to communicate between AP <-> SCU > - side-A PD range managed by AP > - side-B PD range managed by SCU > > 9 MUs to communicate between all cores (AP/M4/DSP). > - side-A PD range managed by core-A (AP/M4/DSP) > - side-B PD range managed by core-B (AP/M4/DSP). > > Communication between AP <-> DSP is done through the assigned MU number > 13. > > So, we power up side-A by the AP and we decide to power up side-B also from > AP. This is because powering it up from DSP would be painful. > > Powering up side B from DSP would require the DSP to communicate with SCU > and to keep things simple we don't want that now. > > Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com> Reviewed-by: Dong Aisheng <aisheng.dong@nxp.com> Regards Aisheng
diff --git a/drivers/firmware/imx/scu-pd.c b/drivers/firmware/imx/scu-pd.c index 950d30238186..eb9700b66a76 100644 --- a/drivers/firmware/imx/scu-pd.c +++ b/drivers/firmware/imx/scu-pd.c @@ -93,6 +93,7 @@ static const struct imx_sc_pd_range imx8qxp_scu_pd_ranges[] = { { "kpp", IMX_SC_R_KPP, 1, false, 0 }, { "fspi", IMX_SC_R_FSPI_0, 2, true, 0 }, { "mu_a", IMX_SC_R_MU_0A, 14, true, 0 }, + { "mu_b", IMX_SC_R_MU_13B, 1, true, 13 }, /* CONN SS */ { "usb", IMX_SC_R_USB_0, 2, true, 0 },
LSIO subsystem contains 14 MU instances. 5 MUs to communicate between AP <-> SCU - side-A PD range managed by AP - side-B PD range managed by SCU 9 MUs to communicate between all cores (AP/M4/DSP). - side-A PD range managed by core-A (AP/M4/DSP) - side-B PD range managed by core-B (AP/M4/DSP). Communication between AP <-> DSP is done through the assigned MU number 13. So, we power up side-A by the AP and we decide to power up side-B also from AP. This is because powering it up from DSP would be painful. Powering up side B from DSP would require the DSP to communicate with SCU and to keep things simple we don't want that now. Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com> --- drivers/firmware/imx/scu-pd.c | 1 + 1 file changed, 1 insertion(+)