leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

CLK: TI: omap5: Initialize USB_DPLL at boot

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

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>
Tested-by: Nishanth Menon <nm@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit is contained in:
Roger Quadros 2013-07-24 16:30:55 +03:00 committed by Mike Turquette
parent 52b14728dd
commit 62125a46cd
1 changed files with 17 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
drivers/clk/ti/clk-54xx.c
View File

@ -19,6 +19,12 @@
#define OMAP5_DPLL_ABE_DEFFREQ 98304000
/*
* OMAP543x TRM, section "3.6.3.9.5 DPLL_USB Preferred Settings"
* states it must be at 960MHz
*/
#define OMAP5_DPLL_USB_DEFFREQ 960000000
static struct ti_dt_clk omap54xx_clks[] = {
DT_CLK(NULL, "pad_clks_src_ck", "pad_clks_src_ck"),
DT_CLK(NULL, "pad_clks_ck", "pad_clks_ck"),
@ -220,7 +226,7 @@ static struct ti_dt_clk omap54xx_clks[] = {
int __init omap5xxx_dt_clk_init(void)
{
int rc;
struct clk *abe_dpll_ref, *abe_dpll, *sys_32k_ck;
struct clk *abe_dpll_ref, *abe_dpll, *sys_32k_ck, *usb_dpll;
ti_dt_clocks_register(omap54xx_clks);
@ -235,5 +241,15 @@ int __init omap5xxx_dt_clk_init(void)
if (rc)
pr_err("%s: failed to configure ABE DPLL!\n", __func__);
usb_dpll = clk_get_sys(NULL, "dpll_usb_ck");
rc = clk_set_rate(usb_dpll, OMAP5_DPLL_USB_DEFFREQ);
if (rc)
pr_err("%s: failed to configure USB DPLL!\n", __func__);
usb_dpll = clk_get_sys(NULL, "dpll_usb_m2_ck");
rc = clk_set_rate(usb_dpll, OMAP5_DPLL_USB_DEFFREQ/2);
if (rc)
pr_err("%s: failed to set USB_DPLL M2 OUT\n", __func__);
return 0;
}