* Christoph Fritz <chf.fritz@xxxxxxxxxxxxxx> [140214 06:24]:
> Full device tree support for clock control, especially to set frequencies,
> is not yet accomplished. Until then, configure the 24Mhz of sys_clkout2 to
> feed an USB-Hub here.
Hmm would like to see Tero's comments on this, I wonder if we should
wait on this to avoid extra churn?
Regards,
Tony
> 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 435a823..e36ac3f 100644
> --- a/arch/arm/mach-omap2/pdata-quirks.c
> +++ b/arch/arm/mach-omap2/pdata-quirks.c
> @@ -172,6 +172,43 @@ static void __init am3517_evm_legacy_init(void)
>
> static void __init omap3_dbb056_legacy_init(void)
> {
> + struct clk *clkout2;
> + struct clk *cm96fck;
> +
> + /* Reparent clkout2 to 96M_FCK */
> + pr_info("%s: Late Reparent clkout2 to 96M_FCK\n", __func__);
> + 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("%s: Set clkout2 to 24MHz for internal usb hub\n", __func__);
> + clkout2 = clk_get(NULL, "sys_clkout2");
> + if (clkout2 < 0) {
> + pr_err("%s: couldn't get sys_clkout2\n", __func__);
> + return;
> + }
> + if (clk_set_rate(clkout2, 24000000) < 0) {
> + pr_err("%s: couldn't set sys_clkout2 rate\n", __func__);
> + return;
> + }
> + if (clk_prepare_enable(clkout2) < 0) {
> + pr_err("%s: couldn't enable sys_clkout2\n", __func__);
> + return;
> + }
> +
> + /* Initialize display */
> omap3_dbb056_display_init_of();
> }
> #endif /* CONFIG_ARCH_OMAP3 */
> --
> 1.7.10.4
>
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