clk: at91: add PMC programmable clocks

This patch adds new at91 programmable clocks implementation using common clk
framework.
A programmable clock is a clock which can be exported on a given pin to clock
external devices.
Each programmable clock is given an id (from 0 to 8).
The number of available programmable clocks depends on the SoC you're using.
Programmable clock driver only implements the clock setting (clock rate and
parent setting). It must be chained to a system clock in order to
enable/disable the generated clock.
The PCKX pins used to output the clock signals must be assigned to the
appropriate peripheral (see atmel's datasheets).

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, 15 insertions, 0 deletions

diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index afdfeb27acb8..d0a1f93500f0 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -278,6 +278,21 @@ static const struct of_device_id pmc_clk_ids[] __initdata = {
 		.compatible = "atmel,at91sam9x5-clk-peripheral",
 		.data = of_at91sam9x5_clk_periph_setup,
 	},
+	/* Programmable clocks */
+#if defined(CONFIG_AT91_PROGRAMMABLE_CLOCKS)
+	{
+		.compatible = "atmel,at91rm9200-clk-programmable",
+		.data = of_at91rm9200_clk_prog_setup,
+	},
+	{
+		.compatible = "atmel,at91sam9g45-clk-programmable",
+		.data = of_at91sam9g45_clk_prog_setup,
+	},
+	{
+		.compatible = "atmel,at91sam9x5-clk-programmable",
+		.data = of_at91sam9x5_clk_prog_setup,
+	},
+#endif
 	{ /*sentinel*/ }
 };