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authorSimon Glass <sjg@chromium.org>2015-06-05 14:39:36 -0600
committerTom Warren <twarren@nvidia.com>2015-06-09 09:56:13 -0700
commit746dc76b99e44128025d9f18f7a154e2382ed134 (patch)
treef320bd96c7f8f561d9a689f09b1130c5a30a37d8 /arch/arm/mach-tegra
parent20edd1ac7ae7d081078dd64ffe7a89f48c09fd65 (diff)
tegra: clock: Support enabling external clocks
Add a simple function to enable external clocks. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra')
-rw-r--r--arch/arm/mach-tegra/clock.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/mach-tegra/clock.c b/arch/arm/mach-tegra/clock.c
index cdd54388c5..590826072b 100644
--- a/arch/arm/mach-tegra/clock.c
+++ b/arch/arm/mach-tegra/clock.c
@@ -17,11 +17,13 @@
/* Tegra SoC common clock control functions */
#include <common.h>
+#include <errno.h>
#include <asm/io.h>
#include <asm/arch/clock.h>
#include <asm/arch/tegra.h>
#include <asm/arch-tegra/ap.h>
#include <asm/arch-tegra/clk_rst.h>
+#include <asm/arch-tegra/pmc.h>
#include <asm/arch-tegra/timer.h>
#include <div64.h>
#include <fdtdec.h>
@@ -702,3 +704,18 @@ void tegra30_set_up_pllp(void)
set_avp_clock_source(SCLK_SOURCE_PLLP_OUT4);
}
+
+int clock_external_output(int clk_id)
+{
+ struct pmc_ctlr *pmc = (struct pmc_ctlr *)NV_PA_PMC_BASE;
+
+ if (clk_id >= 1 && clk_id <= 3) {
+ setbits_le32(&pmc->pmc_clk_out_cntrl,
+ 1 << (2 + (clk_id - 1) * 8));
+ } else {
+ printf("%s: Unknown output clock id %d\n", __func__, clk_id);
+ return -EINVAL;
+ }
+
+ return 0;
+}