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- /*
- * Copyright 2005-2007 Freescale Semiconductor, Inc. All Rights Reserved.
- * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
- * MA 02110-1301, USA.
- */
-
- #ifndef __ASM_ARCH_MXC_CLOCK_H__
- #define __ASM_ARCH_MXC_CLOCK_H__
-
- #ifndef __ASSEMBLY__
- #include <linux/list.h>
-
- struct module;
-
- struct clk {
- struct list_head node;
- struct module *owner;
- const char *name;
- int id;
- /* Source clock this clk depends on */
- struct clk *parent;
- /* Secondary clock to enable/disable with this clock */
- struct clk *secondary;
- /* Current clock rate */
- unsigned long rate;
- /* Reference count of clock enable/disable */
- __s8 usecount;
- /* Register bit position for clock's enable/disable control. */
- u8 enable_shift;
- /* Register address for clock's enable/disable control. */
- void __iomem *enable_reg;
- u32 flags;
- /* Function ptr to recalculate the clock's rate based on parent
- clock's rate */
- void (*recalc) (struct clk *);
- /* Function ptr to set the clock to a new rate. The rate must match a
- supported rate returned from round_rate. Leave blank if clock is not
- programmable */
- int (*set_rate) (struct clk *, unsigned long);
- /* Function ptr to round the requested clock rate to the nearest
- supported rate that is less than or equal to the requested rate. */
- unsigned long (*round_rate) (struct clk *, unsigned long);
- /* Function ptr to enable the clock. Leave blank if clock can not
- be gated. */
- int (*enable) (struct clk *);
- /* Function ptr to disable the clock. Leave blank if clock can not
- be gated. */
- void (*disable) (struct clk *);
- /* Function ptr to set the parent clock of the clock. */
- int (*set_parent) (struct clk *, struct clk *);
- };
-
- int clk_register(struct clk *clk);
- void clk_unregister(struct clk *clk);
- int clk_get_usecount(struct clk *clk);
- int clk_set_pll_dither(struct clk *clk, unsigned int pll_ppm);
-
- /* Clock flags */
- #define RATE_PROPAGATES (1 << 0) /* Program children too */
- #define ALWAYS_ENABLED (1 << 1) /* Clock cannot be disabled */
- #define RATE_FIXED (1 << 2) /* Fixed clock rate */
- #define CPU_FREQ_TRIG_UPDATE (1 << 3) /* CPUFREQ trig update */
-
- #endif /* __ASSEMBLY__ */
- #endif /* __ASM_ARCH_MXC_CLOCK_H__ */
-