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>

1 files changed, 20 insertions, 4 deletions

diff --git a/arch/arm/cpu/armv7/at91/clock.c b/arch/arm/cpu/armv7/at91/clock.c
index 1588e0c8ea..36ed4a6394 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);
 }