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authorPeng Fan <peng.fan@nxp.com>2020-02-19 13:17:07 +0300
committerShawn Guo <shawnguo@kernel.org>2020-02-24 10:39:56 +0300
commitd3b70cd87e773bb298eb78fbafed68afaf06b1a2 (patch)
tree2d815730a9b286752183fb8c54755fada3dc1291 /include/dt-bindings
parentd6fb02f054127c23b048f4753176c57f3e440e79 (diff)
downloadlinux-d3b70cd87e773bb298eb78fbafed68afaf06b1a2.tar.xz
clk: imx: imx8mm: 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 clock Fixes: ba5625c3e272 ("clk: imx: Add clock driver support for imx8mm") 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/imx8mm-clock.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/include/dt-bindings/clock/imx8mm-clock.h b/include/dt-bindings/clock/imx8mm-clock.h
index dbfee6579d6c..e63a5530aed7 100644
--- a/include/dt-bindings/clock/imx8mm-clock.h
+++ b/include/dt-bindings/clock/imx8mm-clock.h
@@ -272,6 +272,8 @@
#define IMX8MM_CLK_CLKO2 250
-#define IMX8MM_CLK_END 251
+#define IMX8MM_CLK_A53_CORE 251
+
+#define IMX8MM_CLK_END 252
#endif