From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Fritz Subject: [PATCH v4 4/4] ARM: OMAP2+: Add pdata quirk for sys_clkout2 for omap3 DBB056 Date: Fri, 14 Feb 2014 15:20:56 +0100 Message-ID: <1392387656-15186-5-git-send-email-chf.fritz@googlemail.com> References: <1392387656-15186-1-git-send-email-chf.fritz@googlemail.com> Return-path: In-Reply-To: <1392387656-15186-1-git-send-email-chf.fritz-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: bcousson-rdvid1DuHRBWk0Htik3J/w@public.gmane.org Cc: Tomi Valkeinen , Nishanth Menon , Tero Kristo , Javier Martinez Canillas , Tony Lindgren , Daniel Mack , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org 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. Signed-off-by: Christoph Fritz --- 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 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html