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imx8m: configure arm clk sources from PLL

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A53 CCM root max support 1GHz, to support high freq, we need
to switch ARM clk sources from ARM PLL directly.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan 2020-07-09 11:06:24 +08:00
parent ac9a451828
commit 46a8a28bf6
1 changed files with 129 additions and 1 deletions
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130
arch/arm/mach-imx/imx8m/clock_imx8mm.c
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@ -19,6 +19,7 @@ DECLARE_GLOBAL_DATA_PTR;
static struct anamix_pll *ana_pll = (struct anamix_pll *)ANATOP_BASE_ADDR;
static u32 get_root_clk(enum clk_root_index clock_id);
void enable_ocotp_clk(unsigned char enable)
{
clock_enable(CCGR_OCOTP, !!enable);
@ -164,6 +165,109 @@ void dram_disable_bypass(void)
}
#endif
int intpll_configure(enum pll_clocks pll, ulong freq)
{
void __iomem *pll_gnrl_ctl, __iomem *pll_div_ctl;
u32 pll_div_ctl_val, pll_clke_masks;
switch (pll) {
case ANATOP_SYSTEM_PLL1:
pll_gnrl_ctl = &ana_pll->sys_pll1_gnrl_ctl;
pll_div_ctl = &ana_pll->sys_pll1_div_ctl;
pll_clke_masks = INTPLL_DIV20_CLKE_MASK |
INTPLL_DIV10_CLKE_MASK | INTPLL_DIV8_CLKE_MASK |
INTPLL_DIV6_CLKE_MASK | INTPLL_DIV5_CLKE_MASK |
INTPLL_DIV4_CLKE_MASK | INTPLL_DIV3_CLKE_MASK |
INTPLL_DIV2_CLKE_MASK | INTPLL_CLKE_MASK;
break;
case ANATOP_SYSTEM_PLL2:
pll_gnrl_ctl = &ana_pll->sys_pll2_gnrl_ctl;
pll_div_ctl = &ana_pll->sys_pll2_div_ctl;
pll_clke_masks = INTPLL_DIV20_CLKE_MASK |
INTPLL_DIV10_CLKE_MASK | INTPLL_DIV8_CLKE_MASK |
INTPLL_DIV6_CLKE_MASK | INTPLL_DIV5_CLKE_MASK |
INTPLL_DIV4_CLKE_MASK | INTPLL_DIV3_CLKE_MASK |
INTPLL_DIV2_CLKE_MASK | INTPLL_CLKE_MASK;
break;
case ANATOP_SYSTEM_PLL3:
pll_gnrl_ctl = &ana_pll->sys_pll3_gnrl_ctl;
pll_div_ctl = &ana_pll->sys_pll3_div_ctl;
pll_clke_masks = INTPLL_CLKE_MASK;
break;
case ANATOP_ARM_PLL:
pll_gnrl_ctl = &ana_pll->arm_pll_gnrl_ctl;
pll_div_ctl = &ana_pll->arm_pll_div_ctl;
pll_clke_masks = INTPLL_CLKE_MASK;
break;
case ANATOP_GPU_PLL:
pll_gnrl_ctl = &ana_pll->gpu_pll_gnrl_ctl;
pll_div_ctl = &ana_pll->gpu_pll_div_ctl;
pll_clke_masks = INTPLL_CLKE_MASK;
break;
case ANATOP_VPU_PLL:
pll_gnrl_ctl = &ana_pll->vpu_pll_gnrl_ctl;
pll_div_ctl = &ana_pll->vpu_pll_div_ctl;
pll_clke_masks = INTPLL_CLKE_MASK;
break;
default:
return -EINVAL;
};
switch (freq) {
case MHZ(600):
/* 24 * 0x12c / 3 / 2 ^ 2 */
pll_div_ctl_val = INTPLL_MAIN_DIV_VAL(0x12c) |
INTPLL_PRE_DIV_VAL(3) | INTPLL_POST_DIV_VAL(2);
break;
case MHZ(750):
/* 24 * 0xfa / 2 / 2 ^ 2 */
pll_div_ctl_val = INTPLL_MAIN_DIV_VAL(0xfa) |
INTPLL_PRE_DIV_VAL(2) | INTPLL_POST_DIV_VAL(2);
break;
case MHZ(800):
/* 24 * 0x190 / 3 / 2 ^ 2 */
pll_div_ctl_val = INTPLL_MAIN_DIV_VAL(0x190) |
INTPLL_PRE_DIV_VAL(3) | INTPLL_POST_DIV_VAL(2);
break;
case MHZ(1000):
/* 24 * 0xfa / 3 / 2 ^ 1 */
pll_div_ctl_val = INTPLL_MAIN_DIV_VAL(0xfa) |
INTPLL_PRE_DIV_VAL(3) | INTPLL_POST_DIV_VAL(1);
break;
case MHZ(1200):
/* 24 * 0xc8 / 2 / 2 ^ 1 */
pll_div_ctl_val = INTPLL_MAIN_DIV_VAL(0xc8) |
INTPLL_PRE_DIV_VAL(2) | INTPLL_POST_DIV_VAL(1);
break;
case MHZ(2000):
/* 24 * 0xfa / 3 / 2 ^ 0 */
pll_div_ctl_val = INTPLL_MAIN_DIV_VAL(0xfa) |
INTPLL_PRE_DIV_VAL(3) | INTPLL_POST_DIV_VAL(0);
break;
default:
return -EINVAL;
};
/* Bypass clock and set lock to pll output lock */
setbits_le32(pll_gnrl_ctl, INTPLL_BYPASS_MASK | INTPLL_LOCK_SEL_MASK);
/* Enable reset */
clrbits_le32(pll_gnrl_ctl, INTPLL_RST_MASK);
/* Configure */
writel(pll_div_ctl_val, pll_div_ctl);
__udelay(100);
/* Disable reset */
setbits_le32(pll_gnrl_ctl, INTPLL_RST_MASK);
/* Wait Lock */
while (!(readl(pll_gnrl_ctl) & INTPLL_LOCK_MASK))
;
/* Clear bypass */
clrbits_le32(pll_gnrl_ctl, INTPLL_BYPASS_MASK);
setbits_le32(pll_gnrl_ctl, pll_clke_masks);
return 0;
}
void init_uart_clk(u32 index)
{
/*
@ -240,6 +344,15 @@ int clock_init(void)
INTPLL_DIV20_CLKE_MASK;
writel(val_cfg0, &ana_pll->sys_pll2_gnrl_ctl);
/* Configure ARM at 1.2GHz */
clock_set_target_val(ARM_A53_CLK_ROOT, CLK_ROOT_ON |
CLK_ROOT_SOURCE_SEL(2));
intpll_configure(ANATOP_ARM_PLL, MHZ(1200));
/* Bypass CCM A53 ROOT, Switch to ARM PLL -> MUX-> CPU */
clock_set_target_val(CORE_SEL_CFG, CLK_ROOT_SOURCE_SEL(1));
/* config GIC to sys_pll2_100m */
clock_enable(CCGR_GIC, 0);
clock_set_target_val(GIC_CLK_ROOT, CLK_ROOT_ON |
@ -519,6 +632,8 @@ static u32 get_root_src_clk(enum clk_root_src root_src)
case AUDIO_PLL2_CLK:
case VIDEO_PLL_CLK:
return decode_fracpll(root_src);
case ARM_A53_ALT_CLK:
return get_root_clk(ARM_A53_CLK_ROOT);
default:
return 0;
}
@ -548,13 +663,26 @@ static u32 get_root_clk(enum clk_root_index clock_id)
return root_src_clk / (post_podf + 1) / (pre_podf + 1);
}
u32 get_arm_core_clk(void)
{
enum clk_root_src root_src;
u32 root_src_clk;
if (clock_get_src(CORE_SEL_CFG, &root_src) < 0)
return 0;
root_src_clk = get_root_src_clk(root_src);
return root_src_clk;
}
u32 mxc_get_clock(enum mxc_clock clk)
{
u32 val;
switch (clk) {
case MXC_ARM_CLK:
return get_root_clk(ARM_A53_CLK_ROOT);
return get_arm_core_clk();
case MXC_IPG_CLK:
clock_get_target_val(IPG_CLK_ROOT, &val);
val = val & 0x3;