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Add a new type of clocks that can be provided to a peripheral. In addition to the peripheral clock, this new clock that can use several input clocks as parents can generate divided rates. This would allow a peripheral to have finer grained clocks for generating a baud rate, clocking an asynchronous part or having more options in frequency. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> [sboyd@codeaurora.org: Transition to new clk_hw provider APIs] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
125 lines
3.4 KiB
C
125 lines
3.4 KiB
C
/*
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* drivers/clk/at91/pmc.h
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*
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* Copyright (C) 2013 Boris BREZILLON <b.brezillon@overkiz.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef __PMC_H_
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#define __PMC_H_
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#include <linux/io.h>
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#include <linux/irqdomain.h>
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#include <linux/spinlock.h>
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struct clk_range {
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unsigned long min;
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unsigned long max;
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};
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#define CLK_RANGE(MIN, MAX) {.min = MIN, .max = MAX,}
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struct at91_pmc_caps {
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u32 available_irqs;
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};
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struct at91_pmc {
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void __iomem *regbase;
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int virq;
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spinlock_t lock;
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const struct at91_pmc_caps *caps;
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struct irq_domain *irqdomain;
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u32 imr;
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};
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static inline void pmc_lock(struct at91_pmc *pmc)
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{
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spin_lock(&pmc->lock);
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}
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static inline void pmc_unlock(struct at91_pmc *pmc)
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{
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spin_unlock(&pmc->lock);
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}
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static inline u32 pmc_read(struct at91_pmc *pmc, int offset)
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{
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return readl(pmc->regbase + offset);
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}
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static inline void pmc_write(struct at91_pmc *pmc, int offset, u32 value)
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{
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writel(value, pmc->regbase + offset);
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}
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int of_at91_get_clk_range(struct device_node *np, const char *propname,
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struct clk_range *range);
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void of_at91sam9260_clk_slow_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91rm9200_clk_main_osc_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91sam9x5_clk_main_rc_osc_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91rm9200_clk_main_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91sam9x5_clk_main_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91rm9200_clk_pll_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91sam9g45_clk_pll_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91sam9g20_clk_pllb_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_sama5d3_clk_pll_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91sam9x5_clk_plldiv_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91rm9200_clk_master_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91sam9x5_clk_master_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91rm9200_clk_sys_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91rm9200_clk_periph_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91sam9x5_clk_periph_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91rm9200_clk_prog_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91sam9g45_clk_prog_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91sam9x5_clk_prog_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91sam9x5_clk_utmi_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91rm9200_clk_usb_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91sam9x5_clk_usb_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91sam9n12_clk_usb_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_at91sam9x5_clk_smd_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_sama5d4_clk_h32mx_setup(struct device_node *np,
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struct at91_pmc *pmc);
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void of_sama5d2_clk_generated_setup(struct device_node *np,
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struct at91_pmc *pmc);
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#endif /* __PMC_H_ */
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