From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tero Kristo Subject: [PATCHv6 11/45] CLK: TI: omap5: Initialize USB_DPLL at boot Date: Thu, 29 Aug 2013 16:16:03 +0300 Message-ID: <1377782197-10611-12-git-send-email-t-kristo@ti.com> References: <1377782197-10611-1-git-send-email-t-kristo@ti.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1377782197-10611-1-git-send-email-t-kristo@ti.com> Sender: linux-omap-owner@vger.kernel.org To: linux-omap@vger.kernel.org, paul@pwsan.com, tony@atomide.com, rnayak@ti.com, nm@ti.com, mturquette@linaro.org Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, Roger Quadros List-Id: devicetree@vger.kernel.org From: Roger Quadros USB_DPLL must be initialized and locked at boot so that USB modules can work. Signed-off-by: Roger Quadros Signed-off-by: Tero Kristo --- drivers/clk/ti/clk-54xx.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/clk/ti/clk-54xx.c b/drivers/clk/ti/clk-54xx.c index bf9dc00..b1163b7 100644 --- a/drivers/clk/ti/clk-54xx.c +++ b/drivers/clk/ti/clk-54xx.c @@ -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 omap_dt_clk omap54xx_clks[] = { DT_CLK(NULL, "pad_clks_src_ck", "pad_clks_src_ck"), DT_CLK(NULL, "pad_clks_ck", "pad_clks_ck"), @@ -194,7 +200,7 @@ static struct omap_dt_clk omap54xx_clks[] = { int __init omap5xxx_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; of_clk_init(NULL); @@ -211,5 +217,15 @@ int __init omap5xxx_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; } -- 1.7.9.5