diff options
| author | Peng Fan <peng.fan@nxp.com> | 2020-02-19 11:17:09 +0100 |
|---|---|---|
| committer | Shawn Guo <shawnguo@kernel.org> | 2020-02-24 08:39:56 +0100 |
| commit | 7ab227210110a4137b005b7be3df1ec2d668ac96 (patch) | |
| tree | b478f5bea8eccafa1bf6a833848f03cc248ec41a /include/dt-bindings | |
| parent | clk: imx: imx8mn: fix a53 cpu clock (diff) | |
| download | linux-7ab227210110a4137b005b7be3df1ec2d668ac96.tar.xz linux-7ab227210110a4137b005b7be3df1ec2d668ac96.zip | |
clk: imx: imx8mp: fix a53 cpu clock
The A53 CCM clk root only accepts input up to 1GHz, CCM A53 root
signoff timing is 1Ghz, however the A53 core which sources from CCM
root could run above 1GHz which voilates the CCM.
There is a CORE_SEL slice before A53 core, we need configure the
CORE_SEL slice source from ARM PLL, not A53 CCM clk root.
The A53 CCM clk root should only be used when need to change ARM PLL
frequency.
Add arm_a53_core clk that could source from arm_a53_div and arm_pll_out.
Configure a53 ccm root sources from 800MHz sys pll
Configure a53 core sources from arm_pll_out
Mark arm_a53_core as critical clk
Reviewed-by: Jacky Bai <ping.bai@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Diffstat (limited to 'include/dt-bindings')
| -rw-r--r-- | include/dt-bindings/clock/imx8mp-clock.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/dt-bindings/clock/imx8mp-clock.h b/include/dt-bindings/clock/imx8mp-clock.h index 00d4d2288990..47ab082238b4 100644 --- a/include/dt-bindings/clock/imx8mp-clock.h +++ b/include/dt-bindings/clock/imx8mp-clock.h @@ -294,7 +294,8 @@ #define IMX8MP_CLK_DRAM_ALT_ROOT 285 #define IMX8MP_CLK_DRAM_CORE 286 #define IMX8MP_CLK_ARM 287 +#define IMX8MP_CLK_A53_CORE 288 -#define IMX8MP_CLK_END 288 +#define IMX8MP_CLK_END 289 #endif |