cpu/allwinner/a10: Refactor API for gating clocks to peripherals

Rather than having to track which bit in which register should be
cleared or set to gate or ungate the clock to a certain peripheral,
provide a simplified enum which encodes the register and bit. This
change comes with a function which decodes the enum and gates/ungates
the clock.

This also removes the register-dependent bitmasks for APB0 and APB1
gating registers.

Change-Id: Ib3ca16e54eb37eadc3ceb88f4ccc497829ac34bc
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/4571
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

1 files changed, 1 insertions, 6 deletions

diff --git a/src/mainboard/cubietech/cubieboard/bootblock.c b/src/mainboard/cubietech/cubieboard/bootblock.c
index a91391c7a0..a7a55b58b2 100644
--- a/src/mainboard/cubietech/cubieboard/bootblock.c
+++ b/src/mainboard/cubietech/cubieboard/bootblock.c
@@ -62,12 +62,7 @@ static void cubieboard_setup_gpios(void)
 
 static void cubieboard_enable_uart(void)
 {
-	u32 reg32;
-	struct a10_ccm *ccm = (void *)A1X_CCM_BASE;
-	/* Enable clock to UART0 */
-	reg32 = read32(&ccm->apb1_gate);
-	reg32 |= APB1_GATE_UART(0);
-	write32(reg32, &ccm->apb1_gate);
+	a1x_periph_clock_enable(A1X_CLKEN_UART0);
 }
 
 void bootblock_mainboard_init(void);