diff options
Diffstat (limited to 'arch/m68k/cpu/mcf5445x/speed.c')
| -rw-r--r-- | arch/m68k/cpu/mcf5445x/speed.c | 80 |
1 files changed, 76 insertions, 4 deletions
diff --git a/arch/m68k/cpu/mcf5445x/speed.c b/arch/m68k/cpu/mcf5445x/speed.c index d71b5fe84..55d1c488a 100644 --- a/arch/m68k/cpu/mcf5445x/speed.c +++ b/arch/m68k/cpu/mcf5445x/speed.c @@ -57,8 +57,10 @@ void clock_enter_limp(int lpdiv) /* Round divider down to nearest power of two */ for (i = 0, j = lpdiv; j != 1; j >>= 1, i++) ; +#ifdef CONFIG_MCF5445x /* Apply the divider to the system clock */ clrsetbits_be16(&ccm->cdr, 0x0f00, CCM_CDR_LPDIV(i)); +#endif /* Enable Limp Mode */ setbits_be16(&ccm->misccr, CCM_MISCCR_LIMP); @@ -81,12 +83,66 @@ void clock_exit_limp(void) ; } -/* - * get_clocks() fills in gd->cpu_clock and gd->bus_clk - */ -int get_clocks(void) +#ifdef CONFIG_MCF5441x +void setup_5441x_clocks(void) { + ccm_t *ccm = (ccm_t *)MMAP_CCM; + pll_t *pll = (pll_t *)MMAP_PLL; + int temp, vco = 0, bootmod_ccr, pdr; + + bootmod_ccr = (in_be16(&ccm->ccr) & CCM_CCR_BOOTMOD) >> 14; + + switch (bootmod_ccr) { + case 0: + out_be32(&pll->pcr, 0x00000013); + out_be32(&pll->pdr, 0x00e70c61); + clock_exit_limp(); + break; + case 2: + break; + case 3: + break; + } + /*Change frequency for Modelo SER1 USB host*/ +#ifdef CONFIG_LOW_MCFCLK + temp = in_be32(&pll->pcr); + temp &= ~0x3f; + temp |= 5; + out_be32(&pll->pcr, temp); + + temp = in_be32(&pll->pdr); + temp &= ~0x001f0000; + temp |= 0x00040000; + out_be32(&pll->pdr, temp); + __asm__("tpf"); +#endif + + setbits_be16(&ccm->misccr2, 0x02); + + vco = ((in_be32(&pll->pcr) & PLL_CR_FBKDIV_BITS) + 1) * + CONFIG_SYS_INPUT_CLKSRC; + gd->vco_clk = vco; + + gd->inp_clk = CONFIG_SYS_INPUT_CLKSRC; /* Input clock */ + + pdr = in_be32(&pll->pdr); + temp = (pdr & PLL_DR_OUTDIV1_BITS) + 1; + gd->cpu_clk = vco / temp; /* cpu clock */ + gd->flb_clk = vco / temp; /* FlexBus clock */ + gd->flb_clk >>= 1; + if (in_be16(ccm->misccr2) & 2) /* fsys/4 */ + gd->flb_clk >>= 1; + + temp = ((pdr & PLL_DR_OUTDIV2_BITS) >> 5) + 1; + gd->bus_clk = vco / temp; /* bus clock */ + +} +#endif + +#ifdef CONFIG_MCF5445x +void setup_5445x_clocks(void) +{ ccm_t *ccm = (ccm_t *)MMAP_CCM; pll_t *pll = (pll_t *)MMAP_PLL; int pllmult_nopci[] = { 20, 10, 24, 18, 12, 6, 16, 8 }; @@ -220,6 +276,22 @@ int get_clocks(void) #ifdef CONFIG_FSL_I2C gd->i2c1_clk = gd->bus_clk; #endif +} +#endif + +/* get_clocks() fills in gd->cpu_clock and gd->bus_clk */ +int get_clocks(void) +{ +#ifdef CONFIG_MCF5441x + setup_5441x_clocks(); +#endif +#ifdef CONFIG_MCF5445x + setup_5445x_clocks(); +#endif + +#ifdef CONFIG_FSL_I2C + gd->i2c1_clk = gd->bus_clk; +#endif return (0); } |