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imx: mx6ul/sx: fix mmdc_ch0 clk calculation

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Check "Figure 19-5. BUS clock generation" of i.MX 6SoloX Applications
Processor Reference Manual and "Figure 18-5. BUS clock generation" of
i.MX 6UltraLite Applications Processor Reference Manual. If mmdc clk
sources from pll4_main_clk(pll_audio), the calculation is wrong.

Fix mmdc_ch0 clk calculation. Also add PLL_AUDIO/VIDEO support
for decode_pll.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
This commit is contained in:
Peng Fan 2016-01-06 11:06:31 +08:00 committed by Stefano Babic
parent 234dc63301
commit 9ba18ff8ef
2 changed files with 69 additions and 4 deletions
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61
arch/arm/cpu/armv7/mx6/clock.c
View file

@ -18,6 +18,8 @@ enum pll_clocks {
PLL_BUS, /* System Bus PLL*/
PLL_USBOTG, /* OTG USB PLL */
PLL_ENET, /* ENET PLL */
PLL_AUDIO, /* AUDIO PLL */
PLL_VIDEO, /* AUDIO PLL */
};
struct mxc_ccm_reg *imx_ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
@ -204,7 +206,7 @@ int enable_spi_clk(unsigned char enable, unsigned spi_num)
}
static u32 decode_pll(enum pll_clocks pll, u32 infreq)
{
u32 div;
u32 div, test_div, pll_num, pll_denom;
switch (pll) {
case PLL_SYS:
@ -227,6 +229,44 @@ static u32 decode_pll(enum pll_clocks pll, u32 infreq)
div &= BM_ANADIG_PLL_ENET_DIV_SELECT;
return 25000000 * (div + (div >> 1) + 1);
case PLL_AUDIO:
div = __raw_readl(&imx_ccm->analog_pll_audio);
if (!(div & BM_ANADIG_PLL_AUDIO_ENABLE))
return 0;
/* BM_ANADIG_PLL_AUDIO_BYPASS_CLK_SRC is ignored */
if (div & BM_ANADIG_PLL_AUDIO_BYPASS)
return MXC_HCLK;
pll_num = __raw_readl(&imx_ccm->analog_pll_audio_num);
pll_denom = __raw_readl(&imx_ccm->analog_pll_audio_denom);
test_div = (div & BM_ANADIG_PLL_AUDIO_TEST_DIV_SELECT) >>
BP_ANADIG_PLL_AUDIO_TEST_DIV_SELECT;
div &= BM_ANADIG_PLL_AUDIO_DIV_SELECT;
if (test_div == 3) {
debug("Error test_div\n");
return 0;
}
test_div = 1 << (2 - test_div);
return infreq * (div + pll_num / pll_denom) / test_div;
case PLL_VIDEO:
div = __raw_readl(&imx_ccm->analog_pll_video);
if (!(div & BM_ANADIG_PLL_VIDEO_ENABLE))
return 0;
/* BM_ANADIG_PLL_AUDIO_BYPASS_CLK_SRC is ignored */
if (div & BM_ANADIG_PLL_VIDEO_BYPASS)
return MXC_HCLK;
pll_num = __raw_readl(&imx_ccm->analog_pll_video_num);
pll_denom = __raw_readl(&imx_ccm->analog_pll_video_denom);
test_div = (div & BM_ANADIG_PLL_VIDEO_POST_DIV_SELECT) >>
BP_ANADIG_PLL_VIDEO_POST_DIV_SELECT;
div &= BM_ANADIG_PLL_VIDEO_DIV_SELECT;
if (test_div == 3) {
debug("Error test_div\n");
return 0;
}
test_div = 1 << (2 - test_div);
return infreq * (div + pll_num / pll_denom) / test_div;
default:
return 0;
}
@ -437,7 +477,7 @@ static u32 get_mmdc_ch0_clk(void)
u32 cbcmr = __raw_readl(&imx_ccm->cbcmr);
u32 cbcdr = __raw_readl(&imx_ccm->cbcdr);
u32 freq, podf, per2_clk2_podf;
u32 freq, podf, per2_clk2_podf, pmu_misc2_audio_div;
if (is_cpu_type(MXC_CPU_MX6SX) || is_cpu_type(MXC_CPU_MX6UL) ||
is_cpu_type(MXC_CPU_MX6SL)) {
@ -472,8 +512,21 @@ static u32 get_mmdc_ch0_clk(void)
freq = mxc_get_pll_pfd(PLL_BUS, 0);
break;
case 3:
/* static / 2 divider */
freq = mxc_get_pll_pfd(PLL_BUS, 2) / 2;
pmu_misc2_audio_div = PMU_MISC2_AUDIO_DIV(__raw_readl(&imx_ccm->pmu_misc2));
switch (pmu_misc2_audio_div) {
case 0:
case 2:
pmu_misc2_audio_div = 1;
break;
case 1:
pmu_misc2_audio_div = 2;
break;
case 3:
pmu_misc2_audio_div = 4;
break;
}
freq = decode_pll(PLL_AUDIO, MXC_HCLK) /
pmu_misc2_audio_div;
break;
}
}

12
arch/arm/include/asm/arch-mx6/crm_regs.h
View file

@ -1227,4 +1227,16 @@ struct mxc_ccm_reg {
#define BM_ANADIG_ANA_MISC0_REFTOP_SELBIASOFF 0x00000008
#define BM_PMU_MISC2_AUDIO_DIV_MSB (1 << 23)
#define BP_PMU_MISC2_AUDIO_DIV_MSB 23
#define BM_PMU_MISC2_AUDIO_DIV_LSB (1 << 15)
#define BP_PMU_MISC2_AUDIO_DIV_LSB 15
#define PMU_MISC2_AUDIO_DIV(v) \
(((v & BM_PMU_MISC2_AUDIO_DIV_MSB) >> \
(BP_PMU_MISC2_AUDIO_DIV_MSB - 1)) | \
((v & BM_PMU_MISC2_AUDIO_DIV_LSB) >> \
BP_PMU_MISC2_AUDIO_DIV_LSB))
#endif /*__ARCH_ARM_MACH_MX6_CCM_REGS_H__ */