From d481f86449ccd66314b700c78b3a79168df80d02 Mon Sep 17 00:00:00 2001
From: Andrew Victor <andrew@sanpeople.com>
Date: Fri, 1 Dec 2006 11:27:31 +0100
Subject: [PATCH] [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: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
arch/arm/mach-at91rm9200/clock.c | 26 ++++++++++++++++++++++----
arch/arm/mach-at91rm9200/clock.h | 1 +
arch/arm/mach-at91rm9200/pm.c | 13 ++++++++++---
3 files changed, 33 insertions(+), 7 deletions(-)
diff --git a/arch/arm/mach-at91rm9200/clock.c b/arch/arm/mach-at91rm9200/clock.c
index 1e0000ceb343f3..4dee21fefe5a61 100644
--- a/arch/arm/mach-at91rm9200/clock.c
+++ b/arch/arm/mach-at91rm9200/clock.c
@@ -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);
diff --git a/arch/arm/mach-at91rm9200/clock.h b/arch/arm/mach-at91rm9200/clock.h
index 0592e662ab3716..b5c7a2eb2d1dd7 100644
--- a/arch/arm/mach-at91rm9200/clock.h
+++ b/arch/arm/mach-at91rm9200/clock.h
@@ -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 {
diff --git a/arch/arm/mach-at91rm9200/pm.c b/arch/arm/mach-at91rm9200/pm.c
index 5b775fac1c6b56..67aa5572a3eaeb 100644
--- a/arch/arm/mach-at91rm9200/pm.c
+++ b/arch/arm/mach-at91rm9200/pm.c
@@ -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"
@@ -70,9 +71,15 @@ 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) {
- pr_debug("AT91: PM - Suspend-to-RAM with USB still active\n");
- return 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
--
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