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snowball: Adding CPU clock initialisation

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Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: John Rigby <john.rigby@linaro.org>
This commit is contained in:
Mathieu J. Poirier 2012-07-31 08:59:26 +00:00 committed by Albert ARIBAUD
parent 9652de7c48
commit 81637e26b3
3 changed files with 37 additions and 4 deletions
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34
arch/arm/cpu/armv7/u8500/clock.c
View file

@ -54,3 +54,37 @@ void u8500_clock_enable(int periph, int cluster, int kern)
if (cluster != -1)
writel(1 << cluster, &clkrst->pcken);
}
void db8500_clocks_init(void)
{
/*
* Enable all clocks. This is u-boot, we can enable it all. There is no
* powersave in u-boot.
*/
u8500_clock_enable(1, 9, -1); /* GPIO0 */
u8500_clock_enable(2, 11, -1);/* GPIO1 */
u8500_clock_enable(3, 8, -1); /* GPIO2 */
u8500_clock_enable(5, 1, -1); /* GPIO3 */
u8500_clock_enable(3, 6, 6); /* UART2 */
u8500_clock_enable(3, 3, 3); /* I2C0 */
u8500_clock_enable(1, 5, 5); /* SDI0 */
u8500_clock_enable(2, 4, 2); /* SDI4 */
u8500_clock_enable(6, 6, -1); /* MTU0 */
u8500_clock_enable(3, 4, 4); /* SDI2 */
/*
* Enabling clocks for all devices which are AMBA devices in the
* kernel. Otherwise they will not get probe()'d because the
* peripheral ID register will not be powered.
*/
/* XXX: some of these differ between ED/V1 */
u8500_clock_enable(1, 1, 1); /* UART1 */
u8500_clock_enable(1, 0, 0); /* UART0 */
u8500_clock_enable(3, 2, 2); /* SSP1 */
u8500_clock_enable(3, 1, 1); /* SSP0 */
u8500_clock_enable(2, 8, -1); /* SPI0 */
u8500_clock_enable(2, 5, 3); /* MSP2 */
}

2
arch/arm/cpu/armv7/u8500/cpu.c
View file

@ -27,6 +27,7 @@
#include <common.h>
#include <asm/io.h>
#include <asm/arch/prcmu.h>
#include <asm/arch/clock.h>
#ifdef CONFIG_ARCH_CPU_INIT
/*
@ -35,6 +36,7 @@
int arch_cpu_init(void)
{
db8500_prcmu_init();
db8500_clocks_init();
return 0;
}

5
arch/arm/include/asm/arch-u8500/clock.h
View file

@ -64,9 +64,6 @@ struct prcmu {
extern void u8500_clock_enable(int periph, int kern, int cluster);
static inline void u8500_prcmu_enable(unsigned int *reg)
{
writel(readl(reg) | (1 << 8), reg);
}
void db8500_clocks_init(void);
#endif /* __ASM_ARCH_CLOCK */