Dear Wenyou Yang,
Wenyou Yang wenyou.yang@atmel.com writes:
Some peripherals may need a second clock source that may be different from the system clock. This second clock is the generated clock (GCK) and is managed by the PMC via PMC_PCR.
For simplicity, the clock source of the GCK is fixed to PLLA_CLK.
Signed-off-by: Wenyou Yang wenyou.yang@atmel.com Reviewed-by: Andreas Bießmann andreas.devel@googlemail.com
Changes in v3: 1./ add arguments for at91_enable_periph_generated_clk(). 2./ add return value for at91_enable_periph_generated_clk().
Changes in v2: 1./ add timeout to wait for GCK ready. 2./ add warning for timeout to wait for GCK ready. 3./ add printout when the improper GCK clock source is selected. 4./ rework AT91_PMC_PCR_GCKDIV_(x) macro to make sure x is right.
arch/arm/mach-at91/armv7/clock.c | 95 ++++++++++++++++++++++++++++ arch/arm/mach-at91/include/mach/at91_pmc.h | 13 ++++ arch/arm/mach-at91/include/mach/clk.h | 10 +++ 3 files changed, 118 insertions(+)
applied to u-boot-atmel/master, thanks!
Best regards, Andreas Bießmann