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imx8m: configure NoC clk 

Configure NoC clk for better system performance

Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan 2020-07-09 11:18:50 +08:00
parent 46a8a28bf6
commit 14254e646d
1 changed files with 13 additions and 0 deletions
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13
arch/arm/mach-imx/imx8m/clock_imx8mm.c
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@ -353,11 +353,24 @@ int clock_init(void)
/* Bypass CCM A53 ROOT, Switch to ARM PLL -> MUX-> CPU */
clock_set_target_val(CORE_SEL_CFG, CLK_ROOT_SOURCE_SEL(1));
if (is_imx8mn() || is_imx8mp())
intpll_configure(ANATOP_SYSTEM_PLL3, MHZ(600));
else
intpll_configure(ANATOP_SYSTEM_PLL3, MHZ(750));
#ifdef CONFIG_IMX8MP
/* 8MP ROM already set NOC to 800Mhz, only need to configure NOC_IO clk to 600Mhz */
/* 8MP ROM already set GIC to 400Mhz, system_pll1_800m with div = 2 */
clock_set_target_val(NOC_IO_CLK_ROOT, CLK_ROOT_ON | CLK_ROOT_SOURCE_SEL(2));
#else
clock_set_target_val(NOC_CLK_ROOT, CLK_ROOT_ON | CLK_ROOT_SOURCE_SEL(2));
/* config GIC to sys_pll2_100m */
clock_enable(CCGR_GIC, 0);
clock_set_target_val(GIC_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(3));
clock_enable(CCGR_GIC, 1);
#endif
clock_set_target_val(NAND_USDHC_BUS_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(1));