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| author | Bo Shen <voice.shen@atmel.com> | 2014-08-06 17:24:54 +0800 |
|---|---|---|
| committer | Andreas Bießmann <andreas.devel@googlemail.com> | 2014-09-19 00:11:18 +0200 |
| commit | b24c1a10b53e831b28da6a69911061a28b34bbd6 (patch) | |
| tree | 3ef440387dc87dbe90ce842312d72ae16dcd7ccf | |
| parent | 7b1dc26fae813fcf7650340803972feb8829853e (diff) | |
| download | u-boot-imx-b24c1a10b53e831b28da6a69911061a28b34bbd6.zip u-boot-imx-b24c1a10b53e831b28da6a69911061a28b34bbd6.tar.gz u-boot-imx-b24c1a10b53e831b28da6a69911061a28b34bbd6.tar.bz2 | |
ARM: atmel: use pcr to enable or disable peripheral clock
When use pcr (peripheral control register), then we won't need
to care about the peripheral ID.
Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
| -rw-r--r-- | arch/arm/cpu/armv7/at91/clock.c | 24 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-at91/at91_pmc.h | 4 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-at91/clk.h | 1 |
3 files changed, 25 insertions, 4 deletions
diff --git a/arch/arm/cpu/armv7/at91/clock.c b/arch/arm/cpu/armv7/at91/clock.c index 1588e0c..36ed4a6 100644 --- a/arch/arm/cpu/armv7/at91/clock.c +++ b/arch/arm/cpu/armv7/at91/clock.c @@ -114,9 +114,25 @@ int at91_clock_init(unsigned long main_clock) void at91_periph_clk_enable(int id) { struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; + u32 regval; - if (id > 31) - writel(1 << (id - 32), &pmc->pcer1); - else - writel(1 << id, &pmc->pcer); + if (id > AT91_PMC_PCR_PID_MASK) + return; + + regval = AT91_PMC_PCR_EN | AT91_PMC_PCR_CMD_WRITE | id; + + writel(regval, &pmc->pcr); +} + +void at91_periph_clk_disable(int id) +{ + struct at91_pmc *pmc = (struct at91_pmc *)ATMEL_BASE_PMC; + u32 regval; + + if (id > AT91_PMC_PCR_PID_MASK) + return; + + regval = AT91_PMC_PCR_CMD_WRITE | id; + + writel(regval, &pmc->pcr); } diff --git a/arch/arm/include/asm/arch-at91/at91_pmc.h b/arch/arm/include/asm/arch-at91/at91_pmc.h index 04f6239..bef5793 100644 --- a/arch/arm/include/asm/arch-at91/at91_pmc.h +++ b/arch/arm/include/asm/arch-at91/at91_pmc.h @@ -147,6 +147,10 @@ typedef struct at91_pmc { #define AT91_PMC_IXR_PCKRDY3 0x00000800 #define AT91_PMC_IXR_MOSCSELS 0x00010000 +#define AT91_PMC_PCR_PID_MASK (0x3f) +#define AT91_PMC_PCR_CMD_WRITE (0x1 << 12) +#define AT91_PMC_PCR_EN (0x1 << 28) + #define AT91_PMC_PCK (1 << 0) /* Processor Clock */ #define AT91RM9200_PMC_UDP (1 << 1) /* USB Devcice Port Clock [AT91RM9200 only] */ #define AT91RM9200_PMC_MCKUDP (1 << 2) /* USB Device Port Master Clock Automatic Disable on Suspend [AT91RM9200 only] */ diff --git a/arch/arm/include/asm/arch-at91/clk.h b/arch/arm/include/asm/arch-at91/clk.h index ce9e28f..4076a78 100644 --- a/arch/arm/include/asm/arch-at91/clk.h +++ b/arch/arm/include/asm/arch-at91/clk.h @@ -80,4 +80,5 @@ static inline unsigned long get_mci_clk_rate(void) int at91_clock_init(unsigned long main_clock); void at91_periph_clk_enable(int id); +void at91_periph_clk_disable(int id); #endif /* __ASM_ARM_ARCH_CLK_H__ */ |