diff options
Diffstat (limited to 'arch/arm/mach-mx3/clock-imx35.c')
| -rw-r--r-- | arch/arm/mach-mx3/clock-imx35.c | 109 |
1 files changed, 75 insertions, 34 deletions
diff --git a/arch/arm/mach-mx3/clock-imx35.c b/arch/arm/mach-mx3/clock-imx35.c index 9f3e943e2232..61e4a318980a 100644 --- a/arch/arm/mach-mx3/clock-imx35.c +++ b/arch/arm/mach-mx3/clock-imx35.c @@ -155,7 +155,7 @@ static unsigned long get_rate_arm(void) aad = &clk_consumer[(pdr0 >> 16) & 0xf]; if (aad->sel) - fref = fref * 2 / 3; + fref = fref * 3 / 4; return fref / aad->arm; } @@ -164,7 +164,7 @@ static unsigned long get_rate_ahb(struct clk *clk) { unsigned long pdr0 = __raw_readl(CCM_BASE + CCM_PDR0); struct arm_ahb_div *aad; - unsigned long fref = get_rate_mpll(); + unsigned long fref = get_rate_arm(); aad = &clk_consumer[(pdr0 >> 16) & 0xf]; @@ -176,16 +176,11 @@ static unsigned long get_rate_ipg(struct clk *clk) return get_rate_ahb(NULL) >> 1; } -static unsigned long get_3_3_div(unsigned long in) -{ - return (((in >> 3) & 0x7) + 1) * ((in & 0x7) + 1); -} - static unsigned long get_rate_uart(struct clk *clk) { unsigned long pdr3 = __raw_readl(CCM_BASE + CCM_PDR3); unsigned long pdr4 = __raw_readl(CCM_BASE + CCM_PDR4); - unsigned long div = get_3_3_div(pdr4 >> 10); + unsigned long div = ((pdr4 >> 10) & 0x3f) + 1; if (pdr3 & (1 << 14)) return get_rate_arm() / div; @@ -216,7 +211,7 @@ static unsigned long get_rate_sdhc(struct clk *clk) break; } - return rate / get_3_3_div(div); + return rate / (div + 1); } static unsigned long get_rate_mshc(struct clk *clk) @@ -270,7 +265,7 @@ static unsigned long get_rate_csi(struct clk *clk) else rate = get_rate_ppll(); - return rate / get_3_3_div((pdr2 >> 16) & 0x3f); + return rate / (((pdr2 >> 16) & 0x3f) + 1); } static unsigned long get_rate_otg(struct clk *clk) @@ -283,25 +278,51 @@ static unsigned long get_rate_otg(struct clk *clk) else rate = get_rate_ppll(); - return rate / get_3_3_div((pdr4 >> 22) & 0x3f); + return rate / (((pdr4 >> 22) & 0x3f) + 1); } static unsigned long get_rate_ipg_per(struct clk *clk) { unsigned long pdr0 = __raw_readl(CCM_BASE + CCM_PDR0); unsigned long pdr4 = __raw_readl(CCM_BASE + CCM_PDR4); - unsigned long div1, div2; + unsigned long div; if (pdr0 & (1 << 26)) { - div1 = (pdr4 >> 19) & 0x7; - div2 = (pdr4 >> 16) & 0x7; - return get_rate_arm() / ((div1 + 1) * (div2 + 1)); + div = (pdr4 >> 16) & 0x3f; + return get_rate_arm() / (div + 1); } else { - div1 = (pdr0 >> 12) & 0x7; - return get_rate_ahb(NULL) / div1; + div = (pdr0 >> 12) & 0x7; + return get_rate_ahb(NULL) / (div + 1); } } +static unsigned long get_rate_hsp(struct clk *clk) +{ + unsigned long hsp_podf = (__raw_readl(CCM_BASE + CCM_PDR0) >> 20) & 0x03; + unsigned long fref = get_rate_mpll(); + + if (fref > 400 * 1000 * 1000) { + switch (hsp_podf) { + case 0: + return fref >> 2; + case 1: + return fref >> 3; + case 2: + return fref / 3; + } + } else { + switch (hsp_podf) { + case 0: + case 2: + return fref / 3; + case 1: + return fref / 6; + } + } + + return 0; +} + static int clk_cgr_enable(struct clk *clk) { u32 reg; @@ -343,8 +364,8 @@ DEFINE_CLOCK(cspi2_clk, 1, CCM_CGR0, 12, get_rate_ipg, NULL); DEFINE_CLOCK(ect_clk, 0, CCM_CGR0, 14, get_rate_ipg, NULL); DEFINE_CLOCK(edio_clk, 0, CCM_CGR0, 16, NULL, NULL); DEFINE_CLOCK(emi_clk, 0, CCM_CGR0, 18, get_rate_ipg, NULL); -DEFINE_CLOCK(epit1_clk, 0, CCM_CGR0, 20, get_rate_ipg_per, NULL); -DEFINE_CLOCK(epit2_clk, 1, CCM_CGR0, 22, get_rate_ipg_per, NULL); +DEFINE_CLOCK(epit1_clk, 0, CCM_CGR0, 20, get_rate_ipg, NULL); +DEFINE_CLOCK(epit2_clk, 1, CCM_CGR0, 22, get_rate_ipg, NULL); DEFINE_CLOCK(esai_clk, 0, CCM_CGR0, 24, NULL, NULL); DEFINE_CLOCK(esdhc1_clk, 0, CCM_CGR0, 26, get_rate_sdhc, NULL); DEFINE_CLOCK(esdhc2_clk, 1, CCM_CGR0, 28, get_rate_sdhc, NULL); @@ -359,7 +380,7 @@ DEFINE_CLOCK(i2c1_clk, 0, CCM_CGR1, 10, get_rate_ipg_per, NULL); DEFINE_CLOCK(i2c2_clk, 1, CCM_CGR1, 12, get_rate_ipg_per, NULL); DEFINE_CLOCK(i2c3_clk, 2, CCM_CGR1, 14, get_rate_ipg_per, NULL); DEFINE_CLOCK(iomuxc_clk, 0, CCM_CGR1, 16, NULL, NULL); -DEFINE_CLOCK(ipu_clk, 0, CCM_CGR1, 18, NULL, NULL); +DEFINE_CLOCK(ipu_clk, 0, CCM_CGR1, 18, get_rate_hsp, NULL); DEFINE_CLOCK(kpp_clk, 0, CCM_CGR1, 20, get_rate_ipg, NULL); DEFINE_CLOCK(mlb_clk, 0, CCM_CGR1, 22, get_rate_ahb, NULL); DEFINE_CLOCK(mshc_clk, 0, CCM_CGR1, 24, get_rate_mshc, NULL); @@ -428,19 +449,19 @@ static struct clk nfc_clk = { static struct clk_lookup lookups[] = { _REGISTER_CLOCK(NULL, "asrc", asrc_clk) _REGISTER_CLOCK(NULL, "ata", ata_clk) - _REGISTER_CLOCK(NULL, "can", can1_clk) - _REGISTER_CLOCK(NULL, "can", can2_clk) - _REGISTER_CLOCK("spi_imx.0", NULL, cspi1_clk) - _REGISTER_CLOCK("spi_imx.1", NULL, cspi2_clk) + _REGISTER_CLOCK("flexcan.0", NULL, can1_clk) + _REGISTER_CLOCK("flexcan.1", NULL, can2_clk) + _REGISTER_CLOCK("imx35-cspi.0", NULL, cspi1_clk) + _REGISTER_CLOCK("imx35-cspi.1", NULL, cspi2_clk) _REGISTER_CLOCK(NULL, "ect", ect_clk) _REGISTER_CLOCK(NULL, "edio", edio_clk) _REGISTER_CLOCK(NULL, "emi", emi_clk) - _REGISTER_CLOCK(NULL, "epit", epit1_clk) - _REGISTER_CLOCK(NULL, "epit", epit2_clk) + _REGISTER_CLOCK("imx-epit.0", NULL, epit1_clk) + _REGISTER_CLOCK("imx-epit.1", NULL, epit2_clk) _REGISTER_CLOCK(NULL, "esai", esai_clk) - _REGISTER_CLOCK(NULL, "sdhc", esdhc1_clk) - _REGISTER_CLOCK(NULL, "sdhc", esdhc2_clk) - _REGISTER_CLOCK(NULL, "sdhc", esdhc3_clk) + _REGISTER_CLOCK("sdhci-esdhc-imx.0", NULL, esdhc1_clk) + _REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc2_clk) + _REGISTER_CLOCK("sdhci-esdhc-imx.2", NULL, esdhc3_clk) _REGISTER_CLOCK("fec.0", NULL, fec_clk) _REGISTER_CLOCK(NULL, "gpio", gpio1_clk) _REGISTER_CLOCK(NULL, "gpio", gpio2_clk) @@ -461,7 +482,7 @@ static struct clk_lookup lookups[] = { _REGISTER_CLOCK(NULL, "rtc", rtc_clk) _REGISTER_CLOCK(NULL, "rtic", rtic_clk) _REGISTER_CLOCK(NULL, "scc", scc_clk) - _REGISTER_CLOCK(NULL, "sdma", sdma_clk) + _REGISTER_CLOCK("imx-sdma", NULL, sdma_clk) _REGISTER_CLOCK(NULL, "spba", spba_clk) _REGISTER_CLOCK(NULL, "spdif", spdif_clk) _REGISTER_CLOCK("imx-ssi.0", NULL, ssi1_clk) @@ -485,10 +506,10 @@ static struct clk_lookup lookups[] = { int __init mx35_clocks_init() { - unsigned int ll = 0; + unsigned int cgr2 = 3 << 26, cgr3 = 0; #if defined(CONFIG_DEBUG_LL) && !defined(CONFIG_DEBUG_ICEDCC) - ll = (3 << 16); + cgr2 |= 3 << 16; #endif clkdev_add_table(lookups, ARRAY_SIZE(lookups)); @@ -499,11 +520,31 @@ int __init mx35_clocks_init() __raw_writel((3 << 18), CCM_BASE + CCM_CGR0); __raw_writel((3 << 2) | (3 << 4) | (3 << 6) | (3 << 8) | (3 << 16), CCM_BASE + CCM_CGR1); - __raw_writel((3 << 26) | ll, CCM_BASE + CCM_CGR2); - __raw_writel(0, CCM_BASE + CCM_CGR3); + /* + * Check if we came up in internal boot mode. If yes, we need some + * extra clocks turned on, otherwise the MX35 boot ROM code will + * hang after a watchdog reset. + */ + if (!(__raw_readl(CCM_BASE + CCM_RCSR) & (3 << 10))) { + /* Additionally turn on UART1, SCC, and IIM clocks */ + cgr2 |= 3 << 16 | 3 << 4; + cgr3 |= 3 << 2; + } + + __raw_writel(cgr2, CCM_BASE + CCM_CGR2); + __raw_writel(cgr3, CCM_BASE + CCM_CGR3); + + clk_enable(&iim_clk); + mx35_read_cpu_rev(); + +#ifdef CONFIG_MXC_USE_EPIT + epit_timer_init(&epit1_clk, + MX35_IO_ADDRESS(MX35_EPIT1_BASE_ADDR), MX35_INT_EPIT1); +#else mxc_timer_init(&gpt_clk, MX35_IO_ADDRESS(MX35_GPT1_BASE_ADDR), MX35_INT_GPT); +#endif return 0; } |