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	clk: pxa: transfer CPU clock setting from pxa2xx-cpufreq
This is the initial stage to transfer the pxa25x and pxa27x CPU clocks
handling from cpufreq to the clock API. More precisely, the clocks
transferred are :
 - cpll : core pll, known also as the CPU core turbo frequency
 - core : core, known also as the CPU actual frequency, being either the
          CPU core turbo frequency or the CPU core run frequency
This transfer is a prequel to shrink the code in pxa2xx-cpufreq.c, so
that it can become, at least in devicetree builds, the casual cpufreq-dt
driver.
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
			
			
This commit is contained in:
		
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						commit
						9fe6942950
					
				
					 4 changed files with 415 additions and 28 deletions
				
			
		| 
						 | 
				
			
			@ -18,6 +18,26 @@
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#include <dt-bindings/clock/pxa-clock.h>
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#include "clk-pxa.h"
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#define KHz 1000
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#define MHz (1000 * 1000)
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#define MDREFR_K0DB4	(1 << 29)	/* SDCLK0 Divide by 4 Control/Status */
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#define MDREFR_K2FREE	(1 << 25)	/* SDRAM Free-Running Control */
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#define MDREFR_K1FREE	(1 << 24)	/* SDRAM Free-Running Control */
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#define MDREFR_K0FREE	(1 << 23)	/* SDRAM Free-Running Control */
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#define MDREFR_SLFRSH	(1 << 22)	/* SDRAM Self-Refresh Control/Status */
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#define MDREFR_APD	(1 << 20)	/* SDRAM/SSRAM Auto-Power-Down Enable */
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#define MDREFR_K2DB2	(1 << 19)	/* SDCLK2 Divide by 2 Control/Status */
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#define MDREFR_K2RUN	(1 << 18)	/* SDCLK2 Run Control/Status */
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#define MDREFR_K1DB2	(1 << 17)	/* SDCLK1 Divide by 2 Control/Status */
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#define MDREFR_K1RUN	(1 << 16)	/* SDCLK1 Run Control/Status */
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#define MDREFR_E1PIN	(1 << 15)	/* SDCKE1 Level Control/Status */
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#define MDREFR_K0DB2	(1 << 14)	/* SDCLK0 Divide by 2 Control/Status */
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#define MDREFR_K0RUN	(1 << 13)	/* SDCLK0 Run Control/Status */
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#define MDREFR_E0PIN	(1 << 12)	/* SDCKE0 Level Control/Status */
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#define MDREFR_DB2_MASK	(MDREFR_K2DB2 | MDREFR_K1DB2)
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#define MDREFR_DRI_MASK	0xFFF
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DEFINE_SPINLOCK(lock);
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static struct clk *pxa_clocks[CLK_MAX];
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						 | 
				
			
			@ -106,3 +126,122 @@ void __init clk_pxa_dt_common_init(struct device_node *np)
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{
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	of_clk_add_provider(np, of_clk_src_onecell_get, &onecell_data);
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}
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void pxa2xx_core_turbo_switch(bool on)
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{
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	unsigned long flags;
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	unsigned int unused, clkcfg;
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	local_irq_save(flags);
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	asm("mrc p14, 0, %0, c6, c0, 0" : "=r" (clkcfg));
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	clkcfg &= ~CLKCFG_TURBO & ~CLKCFG_HALFTURBO;
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	if (on)
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		clkcfg |= CLKCFG_TURBO;
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	clkcfg |= CLKCFG_FCS;
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	asm volatile(
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	"	b	2f\n"
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	"	.align	5\n"
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	"1:	mcr	p14, 0, %1, c6, c0, 0\n"
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	"	b	3f\n"
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	"2:	b	1b\n"
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	"3:	nop\n"
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		: "=&r" (unused)
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		: "r" (clkcfg)
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		: );
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	local_irq_restore(flags);
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}
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void pxa2xx_cpll_change(struct pxa2xx_freq *freq,
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			u32 (*mdrefr_dri)(unsigned int), u32 *mdrefr, u32 *cccr)
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{
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	unsigned int clkcfg = freq->clkcfg;
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	unsigned int unused, preset_mdrefr, postset_mdrefr;
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	unsigned long flags;
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	local_irq_save(flags);
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	/* Calculate the next MDREFR.  If we're slowing down the SDRAM clock
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	 * we need to preset the smaller DRI before the change.	 If we're
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	 * speeding up we need to set the larger DRI value after the change.
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	 */
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	preset_mdrefr = postset_mdrefr = readl(mdrefr);
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	if ((preset_mdrefr & MDREFR_DRI_MASK) > mdrefr_dri(freq->membus_khz)) {
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		preset_mdrefr = (preset_mdrefr & ~MDREFR_DRI_MASK);
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		preset_mdrefr |= mdrefr_dri(freq->membus_khz);
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	}
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	postset_mdrefr =
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		(postset_mdrefr & ~MDREFR_DRI_MASK) |
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		mdrefr_dri(freq->membus_khz);
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	/* If we're dividing the memory clock by two for the SDRAM clock, this
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	 * must be set prior to the change.  Clearing the divide must be done
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	 * after the change.
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	 */
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	if (freq->div2) {
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		preset_mdrefr  |= MDREFR_DB2_MASK;
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		postset_mdrefr |= MDREFR_DB2_MASK;
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	} else {
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		postset_mdrefr &= ~MDREFR_DB2_MASK;
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	}
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	/* Set new the CCCR and prepare CLKCFG */
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	writel(freq->cccr, cccr);
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	asm volatile(
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	"	ldr	r4, [%1]\n"
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	"	b	2f\n"
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	"	.align	5\n"
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	"1:	str	%3, [%1]		/* preset the MDREFR */\n"
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	"	mcr	p14, 0, %2, c6, c0, 0	/* set CLKCFG[FCS] */\n"
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	"	str	%4, [%1]		/* postset the MDREFR */\n"
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	"	b	3f\n"
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	"2:	b	1b\n"
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	"3:	nop\n"
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	     : "=&r" (unused)
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	     : "r" (mdrefr), "r" (clkcfg), "r" (preset_mdrefr),
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	       "r" (postset_mdrefr)
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	     : "r4", "r5");
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	local_irq_restore(flags);
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}
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int pxa2xx_determine_rate(struct clk_rate_request *req,
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			  struct pxa2xx_freq *freqs, int nb_freqs)
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{
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	int i, closest_below = -1, closest_above = -1, ret = 0;
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	unsigned long rate;
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	for (i = 0; i < nb_freqs; i++) {
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		rate = freqs[i].cpll;
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		if (rate == req->rate)
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			break;
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		if (rate < req->min_rate)
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			continue;
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		if (rate > req->max_rate)
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			continue;
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		if (rate <= req->rate)
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			closest_below = i;
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		if ((rate >= req->rate) && (closest_above == -1))
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			closest_above = i;
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	}
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	req->best_parent_hw = NULL;
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	if (i < nb_freqs)
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		ret = 0;
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	else if (closest_below >= 0)
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		rate = freqs[closest_below].cpll;
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	else if (closest_above >= 0)
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		rate = freqs[closest_above].cpll;
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	else
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		ret = -EINVAL;
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	pr_debug("%s(rate=%lu) rate=%lu: %d\n", __func__, req->rate, rate, ret);
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	if (!rate)
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		req->rate = rate;
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	return ret;
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}
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			@ -13,6 +13,11 @@
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#ifndef _CLK_PXA_
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#define _CLK_PXA_
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#define CLKCFG_TURBO		0x1
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#define CLKCFG_FCS		0x2
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#define CLKCFG_HALFTURBO	0x4
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#define CLKCFG_FASTBUS		0x8
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#define PARENTS(name) \
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	static const char *const name ## _parents[] __initconst
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#define MUX_RO_RATE_RO_OPS(name, clk_name)			\
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			@ -37,7 +42,7 @@
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#define RATE_RO_OPS(name, clk_name)				\
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	static struct clk_hw name ## _rate_hw;			\
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	static struct clk_ops name ## _rate_ops = {		\
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	static const struct clk_ops name ## _rate_ops = {		\
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		.recalc_rate = name ## _get_rate,		\
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	};							\
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	static struct clk * __init clk_register_ ## name(void)	\
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			@ -50,6 +55,41 @@
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			NULL, NULL, CLK_GET_RATE_NOCACHE);	\
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	}
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#define RATE_OPS(name, clk_name)				\
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	static struct clk_hw name ## _rate_hw;			\
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	static struct clk_ops name ## _rate_ops = {		\
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		.recalc_rate = name ## _get_rate,		\
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		.set_rate = name ## _set_rate,			\
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		.determine_rate = name ## _determine_rate,	\
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	};							\
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	static struct clk * __init clk_register_ ## name(void)	\
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	{							\
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		return clk_register_composite(NULL, clk_name,	\
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			name ## _parents,			\
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			ARRAY_SIZE(name ## _parents),		\
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			NULL, NULL,				\
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			&name ## _rate_hw, &name ## _rate_ops,	\
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			NULL, NULL, CLK_GET_RATE_NOCACHE);	\
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	}
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#define MUX_OPS(name, clk_name, flags)				\
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	static struct clk_hw name ## _mux_hw;			\
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	static const struct clk_ops name ## _mux_ops = {	\
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		.get_parent = name ## _get_parent,		\
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		.set_parent = name ## _set_parent,		\
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		.determine_rate = name ## _determine_rate,	\
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	};							\
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	static struct clk * __init clk_register_ ## name(void)	\
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	{							\
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		return clk_register_composite(NULL, clk_name,	\
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			name ## _parents,			\
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			ARRAY_SIZE(name ## _parents),		\
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			&name ## _mux_hw, &name ## _mux_ops,	\
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			NULL, NULL,				\
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			NULL, NULL,				\
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			CLK_GET_RATE_NOCACHE | flags); \
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	}
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/*
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 * CKEN clock type
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 * This clock takes it source from 2 possible parents :
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			@ -95,6 +135,14 @@ struct desc_clk_cken {
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	PXA_CKEN(dev_id, con_id, name, parents, 1, 1, 1, 1,		\
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		 NULL, cken_reg, cken_bit, flag)
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struct pxa2xx_freq {
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	unsigned long cpll;
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	unsigned int membus_khz;
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	unsigned int cccr;
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	unsigned int div2;
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	unsigned int clkcfg;
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};
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static int dummy_clk_set_parent(struct clk_hw *hw, u8 index)
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{
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	return 0;
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			@ -105,4 +153,11 @@ extern void clkdev_pxa_register(int ckid, const char *con_id,
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extern int clk_pxa_cken_init(const struct desc_clk_cken *clks, int nb_clks);
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void clk_pxa_dt_common_init(struct device_node *np);
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void pxa2xx_core_turbo_switch(bool on);
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void pxa2xx_cpll_change(struct pxa2xx_freq *freq,
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			u32 (*mdrefr_dri)(unsigned int), u32 *mdrefr,
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			u32 *cccr);
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int pxa2xx_determine_rate(struct clk_rate_request *req,
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			  struct pxa2xx_freq *freqs,  int nb_freqs);
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#endif
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			@ -18,6 +18,7 @@
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#include <linux/io.h>
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#include <linux/of.h>
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#include <mach/pxa2xx-regs.h>
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#include <mach/smemc.h>
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#include <dt-bindings/clock/pxa-clock.h>
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#include "clk-pxa.h"
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			@ -30,6 +31,17 @@ enum {
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	PXA_CORE_TURBO,
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};
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#define PXA25x_CLKCFG(T)			\
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	(CLKCFG_FCS |				\
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	 ((T) ? CLKCFG_TURBO : 0))
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#define PXA25x_CCCR(N2, M, L) (N2 << 7 | M << 5 | L)
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#define MDCNFG_DRAC2(mdcnfg)	(((mdcnfg) >> 21) & 0x3)
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#define MDCNFG_DRAC0(mdcnfg)	(((mdcnfg) >> 5) & 0x3)
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/* Define the refresh period in mSec for the SDRAM and the number of rows */
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#define SDRAM_TREF	64	/* standard 64ms SDRAM */
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/*
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 * Various clock factors driven by the CCCR register.
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 */
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			@ -48,6 +60,34 @@ static const char * const get_freq_khz[] = {
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	"core", "run", "cpll", "memory"
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};
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static int get_sdram_rows(void)
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{
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	static int sdram_rows;
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	unsigned int drac2 = 0, drac0 = 0;
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	u32 mdcnfg;
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	if (sdram_rows)
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		return sdram_rows;
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	mdcnfg = readl_relaxed(MDCNFG);
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	if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3))
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		drac2 = MDCNFG_DRAC2(mdcnfg);
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	if (mdcnfg & (MDCNFG_DE0 | MDCNFG_DE1))
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		drac0 = MDCNFG_DRAC0(mdcnfg);
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	sdram_rows = 1 << (11 + max(drac0, drac2));
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	return sdram_rows;
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}
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static u32 mdrefr_dri(unsigned int freq_khz)
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{
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	u32 interval = freq_khz * SDRAM_TREF / get_sdram_rows();
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	return interval / 32;
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}
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/*
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 * Get the clock frequency as reflected by CCCR and the turbo flag.
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 * We assume these values have been applied via a fcs.
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| 
						 | 
				
			
			@ -139,6 +179,21 @@ static struct desc_clk_cken pxa25x_clocks[] __initdata = {
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			     clk_pxa25x_memory_parents, 0),
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};
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/*
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 * In this table, PXA25x_CCCR(N2, M, L) has the following meaning, where :
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 *   - freq_cpll = n * m * L * 3.6864 MHz
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 *   - n = N2 / 2
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 *   - m = 2^(M - 1), where 1 <= M <= 3
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 *   - l = L_clk_mult[L], ie. { 0, 27, 32, 36, 40, 45, 0, }[L]
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 */
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static struct pxa2xx_freq pxa25x_freqs[] = {
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	/* CPU  MEMBUS  CCCR                  DIV2 CCLKCFG      */
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		||||
	{ 99532800, 99500, PXA25x_CCCR(2,  1, 1),  1, PXA25x_CLKCFG(1)},
 | 
			
		||||
	{199065600, 99500, PXA25x_CCCR(4,  1, 1),  0, PXA25x_CLKCFG(1)},
 | 
			
		||||
	{298598400, 99500, PXA25x_CCCR(3,  2, 1),  0, PXA25x_CLKCFG(1)},
 | 
			
		||||
	{398131200, 99500, PXA25x_CCCR(4,  2, 1),  0, PXA25x_CLKCFG(1)},
 | 
			
		||||
};
 | 
			
		||||
 | 
			
		||||
static u8 clk_pxa25x_core_get_parent(struct clk_hw *hw)
 | 
			
		||||
{
 | 
			
		||||
	unsigned long clkcfg;
 | 
			
		||||
| 
						 | 
				
			
			@ -151,13 +206,24 @@ static u8 clk_pxa25x_core_get_parent(struct clk_hw *hw)
 | 
			
		|||
	return PXA_CORE_RUN;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static unsigned long clk_pxa25x_core_get_rate(struct clk_hw *hw,
 | 
			
		||||
					      unsigned long parent_rate)
 | 
			
		||||
static int clk_pxa25x_core_set_parent(struct clk_hw *hw, u8 index)
 | 
			
		||||
{
 | 
			
		||||
	return parent_rate;
 | 
			
		||||
	if (index > PXA_CORE_TURBO)
 | 
			
		||||
		return -EINVAL;
 | 
			
		||||
 | 
			
		||||
	pxa2xx_core_turbo_switch(index == PXA_CORE_TURBO);
 | 
			
		||||
 | 
			
		||||
	return 0;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static int clk_pxa25x_core_determine_rate(struct clk_hw *hw,
 | 
			
		||||
					  struct clk_rate_request *req)
 | 
			
		||||
{
 | 
			
		||||
	return __clk_mux_determine_rate(hw, req);
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
PARENTS(clk_pxa25x_core) = { "run", "cpll" };
 | 
			
		||||
MUX_RO_RATE_RO_OPS(clk_pxa25x_core, "core");
 | 
			
		||||
MUX_OPS(clk_pxa25x_core, "core", CLK_SET_RATE_PARENT);
 | 
			
		||||
 | 
			
		||||
static unsigned long clk_pxa25x_run_get_rate(struct clk_hw *hw,
 | 
			
		||||
					     unsigned long parent_rate)
 | 
			
		||||
| 
						 | 
				
			
			@ -184,8 +250,33 @@ static unsigned long clk_pxa25x_cpll_get_rate(struct clk_hw *hw,
 | 
			
		|||
 | 
			
		||||
	return m * l * n2 * parent_rate / 2;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static int clk_pxa25x_cpll_determine_rate(struct clk_hw *hw,
 | 
			
		||||
					  struct clk_rate_request *req)
 | 
			
		||||
{
 | 
			
		||||
	return pxa2xx_determine_rate(req, pxa25x_freqs,
 | 
			
		||||
				     ARRAY_SIZE(pxa25x_freqs));
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static int clk_pxa25x_cpll_set_rate(struct clk_hw *hw, unsigned long rate,
 | 
			
		||||
				    unsigned long parent_rate)
 | 
			
		||||
{
 | 
			
		||||
	int i;
 | 
			
		||||
 | 
			
		||||
	pr_debug("%s(rate=%lu parent_rate=%lu)\n", __func__, rate, parent_rate);
 | 
			
		||||
	for (i = 0; i < ARRAY_SIZE(pxa25x_freqs); i++)
 | 
			
		||||
		if (pxa25x_freqs[i].cpll == rate)
 | 
			
		||||
			break;
 | 
			
		||||
 | 
			
		||||
	if (i >= ARRAY_SIZE(pxa25x_freqs))
 | 
			
		||||
		return -EINVAL;
 | 
			
		||||
 | 
			
		||||
	pxa2xx_cpll_change(&pxa25x_freqs[i], mdrefr_dri, MDREFR, CCCR);
 | 
			
		||||
 | 
			
		||||
	return 0;
 | 
			
		||||
}
 | 
			
		||||
PARENTS(clk_pxa25x_cpll) = { "osc_3_6864mhz" };
 | 
			
		||||
RATE_RO_OPS(clk_pxa25x_cpll, "cpll");
 | 
			
		||||
RATE_OPS(clk_pxa25x_cpll, "cpll");
 | 
			
		||||
 | 
			
		||||
static void __init pxa25x_register_core(void)
 | 
			
		||||
{
 | 
			
		||||
| 
						 | 
				
			
			
 | 
			
		|||
| 
						 | 
				
			
			@ -17,6 +17,8 @@
 | 
			
		|||
#include <linux/clkdev.h>
 | 
			
		||||
#include <linux/of.h>
 | 
			
		||||
 | 
			
		||||
#include <mach/smemc.h>
 | 
			
		||||
 | 
			
		||||
#include <dt-bindings/clock/pxa-clock.h>
 | 
			
		||||
#include "clk-pxa.h"
 | 
			
		||||
 | 
			
		||||
| 
						 | 
				
			
			@ -45,11 +47,52 @@ enum {
 | 
			
		|||
	PXA_MEM_RUN,
 | 
			
		||||
};
 | 
			
		||||
 | 
			
		||||
#define PXA27x_CLKCFG(B, HT, T)			\
 | 
			
		||||
	(CLKCFG_FCS |				\
 | 
			
		||||
	 ((B)  ? CLKCFG_FASTBUS : 0) |		\
 | 
			
		||||
	 ((HT) ? CLKCFG_HALFTURBO : 0) |	\
 | 
			
		||||
	 ((T)  ? CLKCFG_TURBO : 0))
 | 
			
		||||
#define PXA27x_CCCR(A, L, N2) (A << 25 | N2 << 7 | L)
 | 
			
		||||
 | 
			
		||||
#define MDCNFG_DRAC2(mdcnfg)	(((mdcnfg) >> 21) & 0x3)
 | 
			
		||||
#define MDCNFG_DRAC0(mdcnfg)	(((mdcnfg) >> 5) & 0x3)
 | 
			
		||||
 | 
			
		||||
/* Define the refresh period in mSec for the SDRAM and the number of rows */
 | 
			
		||||
#define SDRAM_TREF	64	/* standard 64ms SDRAM */
 | 
			
		||||
 | 
			
		||||
static const char * const get_freq_khz[] = {
 | 
			
		||||
	"core", "run", "cpll", "memory",
 | 
			
		||||
	"system_bus"
 | 
			
		||||
};
 | 
			
		||||
 | 
			
		||||
static int get_sdram_rows(void)
 | 
			
		||||
{
 | 
			
		||||
	static int sdram_rows;
 | 
			
		||||
	unsigned int drac2 = 0, drac0 = 0;
 | 
			
		||||
	u32 mdcnfg;
 | 
			
		||||
 | 
			
		||||
	if (sdram_rows)
 | 
			
		||||
		return sdram_rows;
 | 
			
		||||
 | 
			
		||||
	mdcnfg = readl_relaxed(MDCNFG);
 | 
			
		||||
 | 
			
		||||
	if (mdcnfg & (MDCNFG_DE2 | MDCNFG_DE3))
 | 
			
		||||
		drac2 = MDCNFG_DRAC2(mdcnfg);
 | 
			
		||||
 | 
			
		||||
	if (mdcnfg & (MDCNFG_DE0 | MDCNFG_DE1))
 | 
			
		||||
		drac0 = MDCNFG_DRAC0(mdcnfg);
 | 
			
		||||
 | 
			
		||||
	sdram_rows = 1 << (11 + max(drac0, drac2));
 | 
			
		||||
	return sdram_rows;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static u32 mdrefr_dri(unsigned int freq_khz)
 | 
			
		||||
{
 | 
			
		||||
	u32 interval = freq_khz * SDRAM_TREF / get_sdram_rows();
 | 
			
		||||
 | 
			
		||||
	return (interval - 31) / 32;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
/*
 | 
			
		||||
 * Get the clock frequency as reflected by CCSR and the turbo flag.
 | 
			
		||||
 * We assume these values have been applied via a fcs.
 | 
			
		||||
| 
						 | 
				
			
			@ -145,6 +188,42 @@ static struct desc_clk_cken pxa27x_clocks[] __initdata = {
 | 
			
		|||
 | 
			
		||||
};
 | 
			
		||||
 | 
			
		||||
/*
 | 
			
		||||
 * PXA270 definitions
 | 
			
		||||
 *
 | 
			
		||||
 * For the PXA27x:
 | 
			
		||||
 * Control variables are A, L, 2N for CCCR; B, HT, T for CLKCFG.
 | 
			
		||||
 *
 | 
			
		||||
 * A = 0 => memory controller clock from table 3-7,
 | 
			
		||||
 * A = 1 => memory controller clock = system bus clock
 | 
			
		||||
 * Run mode frequency	= 13 MHz * L
 | 
			
		||||
 * Turbo mode frequency = 13 MHz * L * N
 | 
			
		||||
 * System bus frequency = 13 MHz * L / (B + 1)
 | 
			
		||||
 *
 | 
			
		||||
 * In CCCR:
 | 
			
		||||
 * A = 1
 | 
			
		||||
 * L = 16	  oscillator to run mode ratio
 | 
			
		||||
 * 2N = 6	  2 * (turbo mode to run mode ratio)
 | 
			
		||||
 *
 | 
			
		||||
 * In CCLKCFG:
 | 
			
		||||
 * B = 1	  Fast bus mode
 | 
			
		||||
 * HT = 0	  Half-Turbo mode
 | 
			
		||||
 * T = 1	  Turbo mode
 | 
			
		||||
 *
 | 
			
		||||
 * For now, just support some of the combinations in table 3-7 of
 | 
			
		||||
 * PXA27x Processor Family Developer's Manual to simplify frequency
 | 
			
		||||
 * change sequences.
 | 
			
		||||
 */
 | 
			
		||||
static struct pxa2xx_freq pxa27x_freqs[] = {
 | 
			
		||||
	{104000000, 104000, PXA27x_CCCR(1,  8, 2), 0, PXA27x_CLKCFG(1, 0, 1) },
 | 
			
		||||
	{156000000, 104000, PXA27x_CCCR(1,  8, 3), 0, PXA27x_CLKCFG(1, 0, 1) },
 | 
			
		||||
	{208000000, 208000, PXA27x_CCCR(0, 16, 2), 1, PXA27x_CLKCFG(0, 0, 1) },
 | 
			
		||||
	{312000000, 208000, PXA27x_CCCR(1, 16, 3), 1, PXA27x_CLKCFG(1, 0, 1) },
 | 
			
		||||
	{416000000, 208000, PXA27x_CCCR(1, 16, 4), 1, PXA27x_CLKCFG(1, 0, 1) },
 | 
			
		||||
	{520000000, 208000, PXA27x_CCCR(1, 16, 5), 1, PXA27x_CLKCFG(1, 0, 1) },
 | 
			
		||||
	{624000000, 208000, PXA27x_CCCR(1, 16, 6), 1, PXA27x_CLKCFG(1, 0, 1) },
 | 
			
		||||
};
 | 
			
		||||
 | 
			
		||||
static unsigned long clk_pxa27x_cpll_get_rate(struct clk_hw *hw,
 | 
			
		||||
	unsigned long parent_rate)
 | 
			
		||||
{
 | 
			
		||||
| 
						 | 
				
			
			@ -164,8 +243,33 @@ static unsigned long clk_pxa27x_cpll_get_rate(struct clk_hw *hw,
 | 
			
		|||
 | 
			
		||||
	return N;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static int clk_pxa27x_cpll_determine_rate(struct clk_hw *hw,
 | 
			
		||||
					  struct clk_rate_request *req)
 | 
			
		||||
{
 | 
			
		||||
	return pxa2xx_determine_rate(req, pxa27x_freqs,
 | 
			
		||||
				     ARRAY_SIZE(pxa27x_freqs));
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static int clk_pxa27x_cpll_set_rate(struct clk_hw *hw, unsigned long rate,
 | 
			
		||||
				    unsigned long parent_rate)
 | 
			
		||||
{
 | 
			
		||||
	int i;
 | 
			
		||||
 | 
			
		||||
	pr_debug("%s(rate=%lu parent_rate=%lu)\n", __func__, rate, parent_rate);
 | 
			
		||||
	for (i = 0; i < ARRAY_SIZE(pxa27x_freqs); i++)
 | 
			
		||||
		if (pxa27x_freqs[i].cpll == rate)
 | 
			
		||||
			break;
 | 
			
		||||
 | 
			
		||||
	if (i >= ARRAY_SIZE(pxa27x_freqs))
 | 
			
		||||
		return -EINVAL;
 | 
			
		||||
 | 
			
		||||
	pxa2xx_cpll_change(&pxa27x_freqs[i], mdrefr_dri, MDREFR, CCCR);
 | 
			
		||||
	return 0;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
PARENTS(clk_pxa27x_cpll) = { "osc_13mhz" };
 | 
			
		||||
RATE_RO_OPS(clk_pxa27x_cpll, "cpll");
 | 
			
		||||
RATE_OPS(clk_pxa27x_cpll, "cpll");
 | 
			
		||||
 | 
			
		||||
static unsigned long clk_pxa27x_lcd_base_get_rate(struct clk_hw *hw,
 | 
			
		||||
						  unsigned long parent_rate)
 | 
			
		||||
| 
						 | 
				
			
			@ -217,25 +321,6 @@ static void __init pxa27x_register_plls(void)
 | 
			
		|||
	clk_register_fixed_factor(NULL, "ppll_312mhz", "osc_13mhz", 0, 24, 1);
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static unsigned long clk_pxa27x_core_get_rate(struct clk_hw *hw,
 | 
			
		||||
					      unsigned long parent_rate)
 | 
			
		||||
{
 | 
			
		||||
	unsigned long clkcfg;
 | 
			
		||||
	unsigned int ht, osc_forced;
 | 
			
		||||
	unsigned long ccsr = readl(CCSR);
 | 
			
		||||
 | 
			
		||||
	osc_forced = ccsr & (1 << CCCR_CPDIS_BIT);
 | 
			
		||||
	asm("mrc\tp14, 0, %0, c6, c0, 0" : "=r" (clkcfg));
 | 
			
		||||
	ht = clkcfg & (1 << 2);
 | 
			
		||||
 | 
			
		||||
	if (osc_forced)
 | 
			
		||||
		return parent_rate;
 | 
			
		||||
	if (ht)
 | 
			
		||||
		return parent_rate / 2;
 | 
			
		||||
	else
 | 
			
		||||
		return parent_rate;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static u8 clk_pxa27x_core_get_parent(struct clk_hw *hw)
 | 
			
		||||
{
 | 
			
		||||
	unsigned long clkcfg;
 | 
			
		||||
| 
						 | 
				
			
			@ -254,8 +339,25 @@ static u8 clk_pxa27x_core_get_parent(struct clk_hw *hw)
 | 
			
		|||
		return PXA_CORE_TURBO;
 | 
			
		||||
	return PXA_CORE_RUN;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static int clk_pxa27x_core_set_parent(struct clk_hw *hw, u8 index)
 | 
			
		||||
{
 | 
			
		||||
	if (index > PXA_CORE_TURBO)
 | 
			
		||||
		return -EINVAL;
 | 
			
		||||
 | 
			
		||||
	pxa2xx_core_turbo_switch(index == PXA_CORE_TURBO);
 | 
			
		||||
 | 
			
		||||
	return 0;
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
static int clk_pxa27x_core_determine_rate(struct clk_hw *hw,
 | 
			
		||||
					  struct clk_rate_request *req)
 | 
			
		||||
{
 | 
			
		||||
	return __clk_mux_determine_rate(hw, req);
 | 
			
		||||
}
 | 
			
		||||
 | 
			
		||||
PARENTS(clk_pxa27x_core) = { "osc_13mhz", "run", "cpll" };
 | 
			
		||||
MUX_RO_RATE_RO_OPS(clk_pxa27x_core, "core");
 | 
			
		||||
MUX_OPS(clk_pxa27x_core, "core", CLK_SET_RATE_PARENT);
 | 
			
		||||
 | 
			
		||||
static unsigned long clk_pxa27x_run_get_rate(struct clk_hw *hw,
 | 
			
		||||
					     unsigned long parent_rate)
 | 
			
		||||
| 
						 | 
				
			
			
 | 
			
		|||
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		Reference in a new issue