diff options
| author | Bai Ping <ping.bai@nxp.com> | 2017-10-30 16:27:02 +0800 |
|---|---|---|
| committer | Dong Aisheng <aisheng.dong@nxp.com> | 2019-11-25 16:31:43 +0800 |
| commit | 92e082d9fb664cd53e231522082ab48fcb32b3f0 (patch) | |
| tree | bc557db1fe2c4fe58c3f23f4b6614f75118edb57 /arch/arm64/Kconfig.platforms | |
| parent | 348314ae48959348df563d025787ecf8572f6d28 (diff) | |
MLK-16689-03 driver: soc: Add busfreq driver for imx8mq
Add busfreq driver support on i.MX8MQ. The busfreq driver is
mainly used for dynamic DDR frequency change for power saving
feature. When there is no peripheral or DMA device has direct
access to DDR memory, we can lower the DDR frequency to save
power. Currently, we support frequency setpoint for LPDDR4:
(1): 3200mts, the DDRC core clock is sourced from 800MHz
dram_pll, the DDRC apb clock is 200MHz.
(2): 400mts, the DDRC core clock is source from sys1_pll_400m,
the DDRC apb clock is is sourced from sys1_pll_40m.
(3): 100mts, the DDRC core clock is sourced from sys1_pll_100m,
the DDRC apb clock is sourced from sys1_pll_40m.
In our busfreq driver, we have three mode supported:
* high bus mode <-----> 3200mts;
* audio bus mode <-----> 400mts;
* low bus mode <-----> 100mts;
The actual DDR frequency is done in ARM trusted firmware by calling
the SMCC SiP service call.
Signed-off-by: Bai Ping <ping.bai@nxp.com>
Reviewed-by: Anson Huang <Anson.Huang@nxp.com>
Use CONFIG_IMX8M_BUSFREQ
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Diffstat (limited to 'arch/arm64/Kconfig.platforms')
| -rw-r--r-- | arch/arm64/Kconfig.platforms | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms index 16d761475a86..312089d0c9aa 100644 --- a/arch/arm64/Kconfig.platforms +++ b/arch/arm64/Kconfig.platforms @@ -171,6 +171,8 @@ config ARCH_MXC select ARM64_ERRATUM_845719 if COMPAT select IMX_GPCV2 select IMX_GPCV2_PM_DOMAINS + select HAVE_IMX_BUSFREQ + select IMX8M_BUSFREQ select PM select PM_GENERIC_DOMAINS select SOC_BUS @@ -179,6 +181,9 @@ config ARCH_MXC This enables support for the ARMv8 based SoCs in the NXP i.MX family. +config HAVE_IMX_BUSFREQ + bool "i.MX8M busfreq" + config ARCH_QCOM bool "Qualcomm Platforms" select GPIOLIB |