diff options
-rw-r--r-- | sys/arm/freescale/imx/imx6_pl310.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sys/arm/freescale/imx/imx6_pl310.c b/sys/arm/freescale/imx/imx6_pl310.c index a4e383e..9e0427f 100644 --- a/sys/arm/freescale/imx/imx6_pl310.c +++ b/sys/arm/freescale/imx/imx6_pl310.c @@ -44,6 +44,19 @@ __FBSDID("$FreeBSD$"); void platform_pl310_init(struct pl310_softc *sc) { + uint32_t reg; + + /* + * Enable power saving modes: + * - Dynamic Gating stops the clock when the controller is idle. + * - Standby stops the clock when the cores are in WFI mode. + */ + reg = pl310_read4(sc, PL310_POWER_CTRL); + reg |= POWER_CTRL_ENABLE_GATING | POWER_CTRL_ENABLE_STANDBY; + pl310_write4(sc, PL310_POWER_CTRL, reg); + + pl310_set_ram_latency(sc, PL310_TAG_RAM_CTRL, 4, 2, 3); + pl310_set_ram_latency(sc, PL310_DATA_RAM_CTRL, 4, 2, 3); } void |