Commit f4d7a536 authored by Kishon Vijay Abraham I's avatar Kishon Vijay Abraham I Committed by Tony Lindgren
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ARM: OMAP4: hwmod data: make 'ocp2scp_usb_phy_phy_48m" as the main clock

Commit 92702df3

 ("ARM: OMAP4: PM: fix PM regression introduced by recent
clock cleanup") makes the 'ocp2scp_usb_phy_phy_48m' as optional
functional clock causing regression in MUSB. But this 48MHz clock is a
mandatory clock for usb phy attached to ocp2scp and hence made as the main
clock for ocp2scp.

Cc: Keerthy <j-keerthy@ti.com>
Cc: Benoît Cousson <b-cousson@ti.com>
Cc: Paul Walmsley <paul@pwsan.com>
Signed-off-by: default avatarKishon Vijay Abraham I <kishon@ti.com>
[paul@pwsan.com: add comment to the hwmod data to try to prevent any
 future mistakes here]
Signed-off-by: default avatarPaul Walmsley <paul@pwsan.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 31880c37
......@@ -2714,16 +2714,22 @@ static struct omap_ocp2scp_dev ocp2scp_dev_attr[] = {
{ }
};
static struct omap_hwmod_opt_clk ocp2scp_usb_phy_opt_clks[] = {
{ .role = "48mhz", .clk = "ocp2scp_usb_phy_phy_48m" },
};
/* ocp2scp_usb_phy */
static struct omap_hwmod omap44xx_ocp2scp_usb_phy_hwmod = {
.name = "ocp2scp_usb_phy",
.class = &omap44xx_ocp2scp_hwmod_class,
.clkdm_name = "l3_init_clkdm",
.main_clk = "func_48m_fclk",
/*
* ocp2scp_usb_phy_phy_48m is provided by the OMAP4 PRCM IP
* block as an "optional clock," and normally should never be
* specified as the main_clk for an OMAP IP block. However it
* turns out that this clock is actually the main clock for
* the ocp2scp_usb_phy IP block:
* http://lists.infradead.org/pipermail/linux-arm-kernel/2012-September/119943.html
* So listing ocp2scp_usb_phy_phy_48m as a main_clk here seems
* to be the best workaround.
*/
.main_clk = "ocp2scp_usb_phy_phy_48m",
.prcm = {
.omap4 = {
.clkctrl_offs = OMAP4_CM_L3INIT_USBPHYOCP2SCP_CLKCTRL_OFFSET,
......@@ -2732,8 +2738,6 @@ static struct omap_hwmod omap44xx_ocp2scp_usb_phy_hwmod = {
},
},
.dev_attr = ocp2scp_dev_attr,
.opt_clks = ocp2scp_usb_phy_opt_clks,
.opt_clks_cnt = ARRAY_SIZE(ocp2scp_usb_phy_opt_clks),
};
/*
......
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