diff options
Diffstat (limited to 'arch/arm/mach-omap2/clock34xx.c')
| -rw-r--r-- | arch/arm/mach-omap2/clock34xx.c | 52 |
1 files changed, 44 insertions, 8 deletions
diff --git a/arch/arm/mach-omap2/clock34xx.c b/arch/arm/mach-omap2/clock34xx.c index cd7819cc0c9e..489556eecbd1 100644 --- a/arch/arm/mach-omap2/clock34xx.c +++ b/arch/arm/mach-omap2/clock34xx.c @@ -27,6 +27,7 @@ #include <linux/limits.h> #include <linux/bitops.h> +#include <mach/cpu.h> #include <mach/clock.h> #include <mach/sram.h> #include <asm/div64.h> @@ -337,6 +338,13 @@ static struct omap_clk omap34xx_clks[] = { */ #define SDRC_MPURATE_LOOPS 96 +/* + * DPLL5_FREQ_FOR_USBHOST: USBHOST and USBTLL are the only clocks + * that are sourced by DPLL5, and both of these require this clock + * to be at 120 MHz for proper operation. + */ +#define DPLL5_FREQ_FOR_USBHOST 120000000 + /** * omap3430es2_clk_ssi_find_idlest - return CM_IDLEST info for SSI * @clk: struct clk * being enabled @@ -1055,6 +1063,28 @@ void omap2_clk_prepare_for_reboot(void) #endif } +static void omap3_clk_lock_dpll5(void) +{ + struct clk *dpll5_clk; + struct clk *dpll5_m2_clk; + + dpll5_clk = clk_get(NULL, "dpll5_ck"); + clk_set_rate(dpll5_clk, DPLL5_FREQ_FOR_USBHOST); + clk_enable(dpll5_clk); + + /* Enable autoidle to allow it to enter low power bypass */ + omap3_dpll_allow_idle(dpll5_clk); + + /* Program dpll5_m2_clk divider for no division */ + dpll5_m2_clk = clk_get(NULL, "dpll5_m2_ck"); + clk_enable(dpll5_m2_clk); + clk_set_rate(dpll5_m2_clk, DPLL5_FREQ_FOR_USBHOST); + + clk_disable(dpll5_m2_clk); + clk_disable(dpll5_clk); + return; +} + /* REVISIT: Move this init stuff out into clock.c */ /* @@ -1067,17 +1097,17 @@ static int __init omap2_clk_arch_init(void) return -EINVAL; /* REVISIT: not yet ready for 343x */ -#if 0 - if (clk_set_rate(&virt_prcm_set, mpurate)) - printk(KERN_ERR "Could not find matching MPU rate\n"); -#endif + if (clk_set_rate(&dpll1_ck, mpurate)) + printk(KERN_ERR "*** Unable to set MPU rate\n"); recalculate_root_clocks(); - printk(KERN_INFO "Switched to new clocking rate (Crystal/DPLL3/MPU): " + printk(KERN_INFO "Switched to new clocking rate (Crystal/Core/MPU): " "%ld.%01ld/%ld/%ld MHz\n", - (osc_sys_ck.rate / 1000000), (osc_sys_ck.rate / 100000) % 10, - (core_ck.rate / 1000000), (dpll1_fck.rate / 1000000)) ; + (osc_sys_ck.rate / 1000000), ((osc_sys_ck.rate / 100000) % 10), + (core_ck.rate / 1000000), (arm_fck.rate / 1000000)) ; + + calibrate_delay(); return 0; } @@ -1136,7 +1166,7 @@ int __init omap2_clk_init(void) recalculate_root_clocks(); - printk(KERN_INFO "Clocking rate (Crystal/DPLL/ARM core): " + printk(KERN_INFO "Clocking rate (Crystal/Core/MPU): " "%ld.%01ld/%ld/%ld MHz\n", (osc_sys_ck.rate / 1000000), (osc_sys_ck.rate / 100000) % 10, (core_ck.rate / 1000000), (arm_fck.rate / 1000000)); @@ -1147,6 +1177,12 @@ int __init omap2_clk_init(void) */ clk_enable_init_clocks(); + /* + * Lock DPLL5 and put it in autoidle. + */ + if (omap_rev() >= OMAP3430_REV_ES2_0) + omap3_clk_lock_dpll5(); + /* Avoid sleeping during omap2_clk_prepare_for_reboot() */ /* REVISIT: not yet ready for 343x */ #if 0 |