[alsa-devel] [PATCH 2/6] clk: at91: add audio pll clock driver
Rob Herring
robh at kernel.org
Thu Jun 29 23:47:58 CEST 2017
On Fri, Jun 23, 2017 at 11:00:55AM +0200, Quentin Schulz wrote:
> From: Nicolas Ferre <nicolas.ferre at atmel.com>
>
> This new clock driver set allows to have a fractional divided clock that
> would generate a precise clock particularly suitable for audio
> applications.
>
> The main audio pll clock has two children clocks: one that is connected
> to the PMC, the other that can directly drive a pad. As these two routes
> have different enable bits and different dividers and divider formula,
> they are handled by two different drivers. Each of them could modify the
> rate of the main audio pll parent.
> The main audio pll clock can output 620MHz to 700MHz.
>
> Signed-off-by: Nicolas Ferre <nicolas.ferre at atmel.com>
> Signed-off-by: Quentin Schulz <quentin.schulz at free-electrons.com>
> ---
> .../devicetree/bindings/clock/at91-clock.txt | 10 +
It would be nice to see at91 to transition away from a node per clock to
just clock controller nodes. In any case:
Acked-by: Rob Herring <robh at kernel.org>
> arch/arm/mach-at91/Kconfig | 4 +
> drivers/clk/at91/Makefile | 2 +
> drivers/clk/at91/clk-audio-pll-pad.c | 204 ++++++++++++++++++
> drivers/clk/at91/clk-audio-pll-pmc.c | 175 +++++++++++++++
> drivers/clk/at91/clk-audio-pll.c | 237 +++++++++++++++++++++
> include/linux/clk/at91_pmc.h | 25 +++
> sound/soc/atmel/atmel-classd.c | 20 +-
> 8 files changed, 658 insertions(+), 19 deletions(-)
> create mode 100644 drivers/clk/at91/clk-audio-pll-pad.c
> create mode 100644 drivers/clk/at91/clk-audio-pll-pmc.c
> create mode 100644 drivers/clk/at91/clk-audio-pll.c
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