diff options
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/mach-at91rm9200/clock.c | 85 |
1 files changed, 73 insertions, 12 deletions
diff --git a/arch/arm/mach-at91rm9200/clock.c b/arch/arm/mach-at91rm9200/clock.c index ec8195a..8b95467 100644 --- a/arch/arm/mach-at91rm9200/clock.c +++ b/arch/arm/mach-at91rm9200/clock.c @@ -201,6 +201,54 @@ static struct clk ohci_clk = { .pmc_mask = 1 << AT91_ID_UHP, .mode = pmc_periph_mode, }; +static struct clk ether_clk = { + .name = "ether_clk", + .parent = &mck, + .pmc_mask = 1 << AT91_ID_EMAC, + .mode = pmc_periph_mode, +}; +static struct clk mmc_clk = { + .name = "mci_clk", + .parent = &mck, + .pmc_mask = 1 << AT91_ID_MCI, + .mode = pmc_periph_mode, +}; +static struct clk twi_clk = { + .name = "twi_clk", + .parent = &mck, + .pmc_mask = 1 << AT91_ID_TWI, + .mode = pmc_periph_mode, +}; +static struct clk usart0_clk = { + .name = "usart0_clk", + .parent = &mck, + .pmc_mask = 1 << AT91_ID_US0, + .mode = pmc_periph_mode, +}; +static struct clk usart1_clk = { + .name = "usart1_clk", + .parent = &mck, + .pmc_mask = 1 << AT91_ID_US1, + .mode = pmc_periph_mode, +}; +static struct clk usart2_clk = { + .name = "usart2_clk", + .parent = &mck, + .pmc_mask = 1 << AT91_ID_US2, + .mode = pmc_periph_mode, +}; +static struct clk usart3_clk = { + .name = "usart3_clk", + .parent = &mck, + .pmc_mask = 1 << AT91_ID_US3, + .mode = pmc_periph_mode, +}; +static struct clk spi_clk = { + .name = "spi0_clk", + .parent = &mck, + .pmc_mask = 1 << AT91_ID_SPI, + .mode = pmc_periph_mode, +}; static struct clk *const clock_list[] = { /* four primary clocks -- MUST BE FIRST! */ @@ -223,15 +271,18 @@ static struct clk *const clock_list[] = { /* MCK and peripherals */ &mck, - // usart0..usart3 - // mmc + &usart0_clk, + &usart1_clk, + &usart2_clk, + &usart3_clk, + &mmc_clk, &udc_clk, - // i2c - // spi + &twi_clk, + &spi_clk, // ssc0..ssc2 // tc0..tc5 &ohci_clk, - // ether + ðer_clk, }; @@ -360,7 +411,7 @@ int clk_set_rate(struct clk *clk, unsigned long rate) u32 pckr; pckr = at91_sys_read(AT91_PMC_PCKR(clk->id)); - pckr &= 0x03; + pckr &= AT91_PMC_CSS_PLLB; /* clock selection */ pckr |= prescale << 2; at91_sys_write(AT91_PMC_PCKR(clk->id), pckr); clk->rate_hz = actual; @@ -440,7 +491,7 @@ static int at91_clk_show(struct seq_file *s, void *unused) else state = ""; - seq_printf(s, "%-10s users=%d %-3s %9ld Hz %s\n", + seq_printf(s, "%-10s users=%2d %-3s %9ld Hz %s\n", clk->name, clk->users, state, clk_get_rate(clk), clk->parent ? clk->parent->name : ""); } @@ -483,11 +534,18 @@ static u32 __init at91_pll_rate(struct clk *pll, u32 freq, u32 reg) freq *= mul + 1; } else freq = 0; - if (pll == &pllb && (reg & (1 << 28))) - freq /= 2; + return freq; } +static u32 __init at91_usb_rate(struct clk *pll, u32 freq, u32 reg) +{ + if (pll == &pllb && (reg & AT91_PMC_USB96M)) + return freq / 2; + else + return freq; +} + static unsigned __init at91_pll_calc(unsigned main_freq, unsigned out_freq) { unsigned i, div = 0, mul = 0, diff = 1 << 30; @@ -550,8 +608,8 @@ int __init at91_clock_init(unsigned long main_clock) if (!main_clock) { do { tmp = at91_sys_read(AT91_CKGR_MCFR); - } while (!(tmp & 0x10000)); - main_clock = (tmp & 0xffff) * (AT91_SLOW_CLOCK / 16); + } while (!(tmp & AT91_PMC_MAINRDY)); + main_clock = (tmp & AT91_PMC_MAINF) * (AT91_SLOW_CLOCK / 16); } main_clk.rate_hz = main_clock; @@ -566,13 +624,16 @@ int __init at91_clock_init(unsigned long main_clock) * * REVISIT: assumes MCK doesn't derive from PLLB! */ - at91_pllb_usb_init = at91_pll_calc(main_clock, 48000000 * 2) | 0x10000000; + at91_pllb_usb_init = at91_pll_calc(main_clock, 48000000 * 2) | AT91_PMC_USB96M; pllb.rate_hz = at91_pll_rate(&pllb, main_clock, at91_pllb_usb_init); at91_sys_write(AT91_PMC_PCDR, (1 << AT91_ID_UHP) | (1 << AT91_ID_UDP)); at91_sys_write(AT91_PMC_SCDR, AT91_PMC_UHP | AT91_PMC_UDP); at91_sys_write(AT91_CKGR_PLLBR, 0); at91_sys_write(AT91_PMC_SCER, AT91_PMC_MCKUDP); + udpck.rate_hz = at91_usb_rate(&pllb, pllb.rate_hz, at91_pllb_usb_init); + uhpck.rate_hz = at91_usb_rate(&pllb, pllb.rate_hz, at91_pllb_usb_init); + /* * MCK and CPU derive from one of those primary clocks. * For now, assume this parentage won't change. |