On 01/21/2014 01:47 PM, Christoph Fritz wrote:
> Full device tree support for clock control is not yet accomplished. Until
> then, configure the 24Mhz of sys_clkout2 to feed an USB-Hub here.
you may want to look at next-20140120 or later next tag for your
development.
>
> Signed-off-by: Christoph Fritz <chf.fritz@xxxxxxxxxxxxxx>
> ---
> arch/arm/mach-omap2/pdata-quirks.c | 37 ++++++++++++++++++++++++++++++++++++
> 1 file changed, 37 insertions(+)
>
> diff --git a/arch/arm/mach-omap2/pdata-quirks.c b/arch/arm/mach-omap2/pdata-quirks.c
> index bce8020..07d05f6 100644
> --- a/arch/arm/mach-omap2/pdata-quirks.c
> +++ b/arch/arm/mach-omap2/pdata-quirks.c
> @@ -95,6 +95,43 @@ static void __init omap3_zoom_legacy_init(void)
>
> static void __init omap3_dbb056_legacy_init(void)
> {
> + struct clk *clkout2;
> + struct clk *cm96fck;
> +
> + /* Reparent clkout2 to 96M_FCK */
> + pr_info("a83x-quirk: Late Reparent clkout2 to 96M_FCK\n");
> + clkout2 = clk_get(NULL, "clkout2_src_ck");
> + if(clkout2 < 0) {
> + pr_err("a83x-quirk: couldn't get clkout2_src_ck\n");
> + return;
> + }
> + cm96fck = clk_get(NULL, "cm_96m_fck");
> + if(cm96fck < 0) {
> + pr_err("a83x-quirk: couldn't get cm_96m_fck\n");
> + return;
> + }
> + if(clk_set_parent(clkout2, cm96fck) < 0) {
> + pr_err("a83x-quirk: couldn't reparent clkout2_src_ck\n");
> + return;
> + }
> +
> + /* Set clkout2 to 24MHz for internal usb hub*/
> + pr_info("a83x-quirk: Set clkout2 to 24MHz for internal usb hub\n");
> + clkout2 = clk_get(NULL, "sys_clkout2");
> + if(clkout2 < 0) {
> + pr_err("a83x-quirk: couldn't get sys_clkout2\n");
> + return;
> + }
> + if(clk_set_rate(clkout2, 24000000) < 0) {
> + printk(KERN_ERR "board-omap3evm: couldn't set sys_clkout2 rate\n");
> + return;
> + }
> + if(clk_prepare_enable(clkout2) < 0) {
> + pr_err("a83x-quirk: couldn't enable sys_clkout2\n");
> + return;
> + }
> +
> + /* Initialize display */
> omap3_dbb056_display_init_of();
> }
> #endif /* CONFIG_ARCH_OMAP3 */
>
--
Regards,
Nishanth Menon
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