clk: at91: add PMC peripheral clocks

This patch adds new at91 peripheral clock implementation using common clk
framework.

Almost all peripherals provided by at91 SoCs need a clock to work properly.
This clock is enabled/disabled using PCER/PCDR resgisters.

Each peripheral is given an id (see atmel's datasheets) which is used to
define and reference peripheral clocks.

Some new SoCs (at91sam9x5 and sama5d3) provide a new register (PCR) where you
can configure the peripheral clock as a division of the master clock.
This will help reducing the peripherals power comsumption.

Signed-off-by: Boris BREZILLON <b.brezillon@overkiz.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index a97554f943e4..afdfeb27acb8 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -269,6 +269,15 @@ static const struct of_device_id pmc_clk_ids[] __initdata = {
 		.compatible = "atmel,at91rm9200-clk-system",
 		.data = of_at91rm9200_clk_sys_setup,
 	},
+	/* Peripheral clocks */
+	{
+		.compatible = "atmel,at91rm9200-clk-peripheral",
+		.data = of_at91rm9200_clk_periph_setup,
+	},
+	{
+		.compatible = "atmel,at91sam9x5-clk-peripheral",
+		.data = of_at91sam9x5_clk_periph_setup,
+	},
 	{ /*sentinel*/ }
 };