clk: at91: add PMC main clock

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

If rate is not provided during clock registration it is calculated using
the slow clock (main clk parent in this case) rate and MCFR register.

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, 5 insertions, 0 deletions

diff --git a/drivers/clk/at91/pmc.c b/drivers/clk/at91/pmc.c
index 69c116a6ba4f..3d35b7313868 100644
--- a/drivers/clk/at91/pmc.c
+++ b/drivers/clk/at91/pmc.c
@@ -229,6 +229,11 @@ out_free_pmc:
 }
 
 static const struct of_device_id pmc_clk_ids[] __initdata = {
+	/* Main clock */
+	{
+		.compatible = "atmel,at91rm9200-clk-main",
+		.data = of_at91rm9200_clk_main_setup,
+	},
 	{ /*sentinel*/ }
 };