[U-Boot] [PATCH 1/3] ARM: at91: clock: fix the GCK's clock source

Before enabling a generated clock whose source is from the UPLL clock, check and enable the UPLL clock.

Signed-off-by: Wenyou Yang wenyou.yang@atmel.com ---

arch/arm/mach-at91/armv7/clock.c | 5 +++++ 1 file changed, 5 insertions(+)

diff --git a/arch/arm/mach-at91/armv7/clock.c b/arch/arm/mach-at91/armv7/clock.c index 81e9f69..27372b3 100644 --- a/arch/arm/mach-at91/armv7/clock.c +++ b/arch/arm/mach-at91/armv7/clock.c @@ -162,6 +162,11 @@ int at91_enable_periph_generated_clk(u32 id, u32 clk_source, u32 div) if (div > 0xff) return -EINVAL;

+ if (clk_source == GCK_CSS_UPLL_CLK) { + if (at91_upll_clk_enable()) + return -ENODEV; + } + writel(id, &pmc->pcr); regval = readl(&pmc->pcr); regval &= ~AT91_PMC_PCR_GCKCSS;