[PATCHv6 11/45] CLK: TI: omap5: Initialize USB_DPLL at boot
From: Tero Kristo <hidden>
Date: 2013-08-29 13:16:03
Also in:
linux-arm-kernel, linux-omap
Subsystem:
common clk framework, the rest, ti clock driver · Maintainers:
Michael Turquette, Stephen Boyd, Linus Torvalds, Tero Kristo
From: Roger Quadros <redacted> USB_DPLL must be initialized and locked at boot so that USB modules can work. Signed-off-by: Roger Quadros <redacted> Signed-off-by: Tero Kristo <redacted> --- 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