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Commit d481f864 authored by Andrew Victor's avatar Andrew Victor Committed by Russell King
Browse files

[ARM] 3959/1: AT91: Support for SAM9 USB and HCK clocks 



The bits used to select the USB clocks are different on the SAM9's.
Add support for the HCK clocks on the AT91SAM9261.

Patch from Patrice Vilchez & Nicolas Ferre

Signed-off-by: default avatarAndrew Victor <andrew@sanpeople.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent fcc63716

arch/arm/mach-at91rm9200/clock.c

+22 −4
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ 


#include <asm/hardware.h>

#include <asm/arch/at91_pmc.h>

#include <asm/arch/cpu.h>



#include "clock.h"
@@ -42,6 +43,7 @@ 
#define clk_is_primary(x)	((x)->type & CLK_TYPE_PRIMARY)

#define clk_is_programmable(x)	((x)->type & CLK_TYPE_PROGRAMMABLE)

#define clk_is_peripheral(x)	((x)->type & CLK_TYPE_PERIPHERAL)

#define clk_is_sys(x)		((x)->type & CLK_TYPE_SYSTEM)





static LIST_HEAD(clocks);
@@ -115,13 +117,11 @@ static void pmc_sys_mode(struct clk *clk, int is_on) 
static struct clk udpck = {

	.name		= "udpck",

	.parent		= &pllb,

	.pmc_mask	= AT91_PMC_UDP,

	.mode		= pmc_sys_mode,

};

static struct clk uhpck = {

	.name		= "uhpck",

	.parent		= &pllb,

	.pmc_mask	= AT91_PMC_UHP,

	.mode		= pmc_sys_mode,

};
@@ -435,6 +435,12 @@ int __init clk_register(struct clk *clk) 
		clk->mode = pmc_periph_mode;

		list_add_tail(&clk->node, &clocks);

	}

	else if (clk_is_sys(clk)) {

		clk->parent = &mck;

		clk->mode = pmc_sys_mode;



		list_add_tail(&clk->node, &clocks);

	}

#ifdef CONFIG_AT91_PROGRAMMABLE_CLOCKS

	else if (clk_is_programmable(clk)) {

		clk->mode = pmc_sys_mode;
@@ -587,9 +593,21 @@ int __init at91_clock_init(unsigned long main_clock) 
	 */

	at91_pllb_usb_init = at91_pll_calc(main_clock, 48000000 * 2) | AT91_PMC_USB96M;

	pllb.rate_hz = at91_pll_rate(&pllb, main_clock, at91_pllb_usb_init);

	at91_sys_write(AT91_PMC_SCDR, AT91_PMC_UHP | AT91_PMC_UDP);

	if (cpu_is_at91rm9200()) {

		uhpck.pmc_mask = AT91RM9200_PMC_UHP;

		udpck.pmc_mask = AT91RM9200_PMC_UDP;

		at91_sys_write(AT91_PMC_SCDR, AT91RM9200_PMC_UHP | AT91RM9200_PMC_UDP);

		at91_sys_write(AT91_PMC_SCER, AT91RM9200_PMC_MCKUDP);

	} else if (cpu_is_at91sam9260()) {

		uhpck.pmc_mask = AT91SAM926x_PMC_UHP;

		udpck.pmc_mask = AT91SAM926x_PMC_UDP;

		at91_sys_write(AT91_PMC_SCDR, AT91SAM926x_PMC_UHP | AT91SAM926x_PMC_UDP);

	} else if (cpu_is_at91sam9261()) {

		uhpck.pmc_mask = (AT91SAM926x_PMC_UHP | AT91_PMC_HCK0);

		udpck.pmc_mask = AT91SAM926x_PMC_UDP;

		at91_sys_write(AT91_PMC_SCDR, AT91SAM926x_PMC_UHP | AT91_PMC_HCK0 | AT91SAM926x_PMC_UDP);

	}

	at91_sys_write(AT91_CKGR_PLLBR, 0);

	at91_sys_write(AT91_PMC_SCER, AT91_PMC_MCKUDP);



	udpck.rate_hz = at91_usb_rate(&pllb, pllb.rate_hz, at91_pllb_usb_init);

	uhpck.rate_hz = at91_usb_rate(&pllb, pllb.rate_hz, at91_pllb_usb_init);

arch/arm/mach-at91rm9200/clock.h

+1 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ 
#define CLK_TYPE_PLL		0x2

#define CLK_TYPE_PROGRAMMABLE	0x4

#define CLK_TYPE_PERIPHERAL	0x8

#define CLK_TYPE_SYSTEM		0x10





struct clk {

arch/arm/mach-at91rm9200/pm.c

+10 −3
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ 
#include <asm/arch/at91_pmc.h>

#include <asm/arch/at91rm9200_mc.h>

#include <asm/arch/gpio.h>

#include <asm/arch/cpu.h>



#include "generic.h"
@@ -70,10 +71,16 @@ static int at91_pm_verify_clocks(void) 
	scsr = at91_sys_read(AT91_PMC_SCSR);



	/* USB must not be using PLLB */

	if ((scsr & (AT91_PMC_UHP | AT91_PMC_UDP)) != 0) {

	if (cpu_is_at91rm9200()) {

		if ((scsr & (AT91RM9200_PMC_UHP | AT91RM9200_PMC_UDP)) != 0) {

			pr_debug("AT91: PM - Suspend-to-RAM with USB still active\n");

			return 0;

		}

	} else if (cpu_is_at91sam9260()) {

#warning "Check SAM9260 USB clocks"

	} else if (cpu_is_at91sam9261()) {

#warning "Check SAM9261 USB clocks"

	}



#ifdef CONFIG_AT91_PROGRAMMABLE_CLOCKS

	/* PCK0..PCK3 must be disabled, or configured to use clk32k */