diff options
Diffstat (limited to 'arch/arm/mach-omap2/clock34xx.c')
| -rw-r--r-- | arch/arm/mach-omap2/clock34xx.c | 123 |
1 files changed, 14 insertions, 109 deletions
diff --git a/arch/arm/mach-omap2/clock34xx.c b/arch/arm/mach-omap2/clock34xx.c index ae9e2c82eb6..6febd5f11e8 100644 --- a/arch/arm/mach-omap2/clock34xx.c +++ b/arch/arm/mach-omap2/clock34xx.c @@ -8,7 +8,8 @@ * Jouni Högander * * Parts of this code are based on code written by - * Richard Woodruff, Tony Lindgren, Tuukka Tikkanen, Karthik Dasu + * Richard Woodruff, Tony Lindgren, Tuukka Tikkanen, Karthik Dasu, + * Russell King * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as @@ -17,36 +18,22 @@ #undef DEBUG #include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/delay.h> #include <linux/clk.h> #include <linux/io.h> -#include <plat/cpu.h> #include <plat/clock.h> #include "clock.h" #include "clock34xx.h" -#include "prm.h" -#include "prm-regbits-34xx.h" #include "cm.h" #include "cm-regbits-34xx.h" -/* - * 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 - -/* needed by omap3_core_dpll_m2_set_rate() */ -struct clk *sdrc_ick_p, *arm_fck_p; - /** * omap3430es2_clk_ssi_find_idlest - return CM_IDLEST info for SSI * @clk: struct clk * being enabled * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into + * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator * * The OMAP3430ES2 SSI target CM_IDLEST bit is at a different shift * from the CM_{I,F}CLKEN bit. Pass back the correct info via @@ -54,13 +41,15 @@ struct clk *sdrc_ick_p, *arm_fck_p; */ static void omap3430es2_clk_ssi_find_idlest(struct clk *clk, void __iomem **idlest_reg, - u8 *idlest_bit) + u8 *idlest_bit, + u8 *idlest_val) { u32 r; r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20); *idlest_reg = (__force void __iomem *)r; *idlest_bit = OMAP3430ES2_ST_SSI_IDLE_SHIFT; + *idlest_val = OMAP34XX_CM_IDLEST_VAL; } const struct clkops clkops_omap3430es2_ssi_wait = { @@ -75,6 +64,7 @@ const struct clkops clkops_omap3430es2_ssi_wait = { * @clk: struct clk * being enabled * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into + * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator * * Some OMAP modules on OMAP3 ES2+ chips have both initiator and * target IDLEST bits. For our purposes, we are concerned with the @@ -85,7 +75,8 @@ const struct clkops clkops_omap3430es2_ssi_wait = { */ static void omap3430es2_clk_dss_usbhost_find_idlest(struct clk *clk, void __iomem **idlest_reg, - u8 *idlest_bit) + u8 *idlest_bit, + u8 *idlest_val) { u32 r; @@ -93,6 +84,7 @@ static void omap3430es2_clk_dss_usbhost_find_idlest(struct clk *clk, *idlest_reg = (__force void __iomem *)r; /* USBHOST_IDLE has same shift */ *idlest_bit = OMAP3430ES2_ST_DSS_IDLE_SHIFT; + *idlest_val = OMAP34XX_CM_IDLEST_VAL; } const struct clkops clkops_omap3430es2_dss_usbhost_wait = { @@ -107,6 +99,7 @@ const struct clkops clkops_omap3430es2_dss_usbhost_wait = { * @clk: struct clk * being enabled * @idlest_reg: void __iomem ** to store CM_IDLEST reg address into * @idlest_bit: pointer to a u8 to store the CM_IDLEST bit shift into + * @idlest_val: pointer to a u8 to store the CM_IDLEST indicator * * The OMAP3430ES2 HSOTGUSB target CM_IDLEST bit is at a different * shift from the CM_{I,F}CLKEN bit. Pass back the correct info via @@ -114,13 +107,15 @@ const struct clkops clkops_omap3430es2_dss_usbhost_wait = { */ static void omap3430es2_clk_hsotgusb_find_idlest(struct clk *clk, void __iomem **idlest_reg, - u8 *idlest_bit) + u8 *idlest_bit, + u8 *idlest_val) { u32 r; r = (((__force u32)clk->enable_reg & ~0xf0) | 0x20); *idlest_reg = (__force void __iomem *)r; *idlest_bit = OMAP3430ES2_ST_HSOTGUSB_IDLE_SHIFT; + *idlest_val = OMAP34XX_CM_IDLEST_VAL; } const struct clkops clkops_omap3430es2_hsotgusb_wait = { @@ -129,93 +124,3 @@ const struct clkops clkops_omap3430es2_hsotgusb_wait = { .find_idlest = omap3430es2_clk_hsotgusb_find_idlest, .find_companion = omap2_clk_dflt_find_companion, }; - -const struct clkops omap3_clkops_noncore_dpll_ops = { - .enable = omap3_noncore_dpll_enable, - .disable = omap3_noncore_dpll_disable, -}; - -int omap3_dpll4_set_rate(struct clk *clk, unsigned long rate) -{ - /* - * According to the 12-5 CDP code from TI, "Limitation 2.5" - * on 3430ES1 prevents us from changing DPLL multipliers or dividers - * on DPLL4. - */ - if (omap_rev() == OMAP3430_REV_ES1_0) { - printk(KERN_ERR "clock: DPLL4 cannot change rate due to " - "silicon 'Limitation 2.5' on 3430ES1.\n"); - return -EINVAL; - } - return omap3_noncore_dpll_set_rate(clk, rate); -} - -void __init 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; -} - -/* Common clock code */ - -/* REVISIT: Move this init stuff out into clock.c */ - -/* - * Switch the MPU rate if specified on cmdline. - * We cannot do this early until cmdline is parsed. - */ -static int __init omap3xxx_clk_arch_init(void) -{ - struct clk *osc_sys_ck, *dpll1_ck, *arm_fck, *core_ck; - unsigned long osc_sys_rate; - - if (!cpu_is_omap34xx()) - return 0; - - if (!mpurate) - return -EINVAL; - - /* XXX test these for success */ - dpll1_ck = clk_get(NULL, "dpll1_ck"); - arm_fck = clk_get(NULL, "arm_fck"); - core_ck = clk_get(NULL, "core_ck"); - osc_sys_ck = clk_get(NULL, "osc_sys_ck"); - - /* REVISIT: not yet ready for 343x */ - if (clk_set_rate(dpll1_ck, mpurate)) - printk(KERN_ERR "*** Unable to set MPU rate\n"); - - recalculate_root_clocks(); - - osc_sys_rate = clk_get_rate(osc_sys_ck); - - pr_info("Switched to new clocking rate (Crystal/Core/MPU): " - "%ld.%01ld/%ld/%ld MHz\n", - (osc_sys_rate / 1000000), - ((osc_sys_rate / 100000) % 10), - (clk_get_rate(core_ck) / 1000000), - (clk_get_rate(arm_fck) / 1000000)); - - calibrate_delay(); - - return 0; -} -arch_initcall(omap3xxx_clk_arch_init); - - |