Messages in this thread | | | Date | Thu, 1 Aug 2013 10:06:30 -0500 | From | Nishanth Menon <> | Subject | Re: [PATCH 1/4] CLK: ti: dra7: Initialize USB_DPLL |
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On 08/01/2013 09:58 AM, Roger Quadros wrote: > 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; > } > As I had mentioned on [1] - we are going to see similar needs keep popping up. there is no need to hack this up for even more peripherals :(
http://marc.info/?l=linux-omap&m=137536803106017&w=2
-- Regards, Nishanth Menon
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