[PATCH 1/4] CLK: ti: dra7: Initialize USB_DPLL

Roger Quadros
2013-08-01T14:58:51Z

USB_DPLL must be initialized and locked at boot so that
USB modules can work.

Also program USB_DLL_M2 output to half rate.

Signed-off-by: Roger Quadros <rogerq@ti.com>
---
drivers/clk/omap/clk-7xx.c | 11 +++++++++++
1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/drivers/clk/omap/clk-7xx.c b/drivers/clk/omap/clk-7xx.c
index ddb39dd..f444513 100644
--- a/drivers/clk/omap/clk-7xx.c
+++ b/drivers/clk/omap/clk-7xx.c
@@ -19,6 +19,7 @@

#define DRA7_DPLL_ABE_DEFFREQ 361267200
#define DRA7_DPLL_GMAC_DEFFREQ 1000000000
+#define DRA7_DPLL_USB_DEFFREQ 960000000

static struct omap_dt_clk dra7xx_clks[] = {
@@ -63,5 +64,15 @@ int __init dra7xx_clk_init(void)
if (rc)
pr_err("%s: failed to configure GMAC DPLL!\n", __func__);

+ dpll_ck = clk_get_sys(NULL, "dpll_usb_ck");
+ rc = clk_set_rate(dpll_ck, DRA7_DPLL_USB_DEFFREQ);
+ if (rc)
+ pr_err("%s: failed to configure USB DPLL!\n", __func__);
+
+ dpll_ck = clk_get_sys(NULL, "dpll_usb_m2_ck");
+ rc = clk_set_rate(dpll_ck, DRA7_DPLL_USB_DEFFREQ/2);
+ if (rc)
+ pr_err("%s: failed to set USB_DPLL M2 OUT\n", __func__);
+
return rc;
}
--
1.7.4.1