commit 92702d (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 <[email protected]>
Cc: Benoît Cousson <[email protected]>
Cc: Paul Walmsley <[email protected]>
Signed-off-by: Kishon Vijay Abraham I <[email protected]>
---
arch/arm/mach-omap2/omap_hwmod_44xx_data.c | 8 +-------
1 file changed, 1 insertion(+), 7 deletions(-)
diff --git a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
index 9e05765..c1fb090 100644
--- a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
@@ -2714,16 +2714,12 @@ 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",
+ .main_clk = "ocp2scp_usb_phy_phy_48m",
.prcm = {
.omap4 = {
.clkctrl_offs = OMAP4_CM_L3INIT_USBPHYOCP2SCP_CLKCTRL_OFFSET,
@@ -2732,8 +2728,6 @@ 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),
};
/*
--
1.7.10.4
Hi Kishon,
On 04/09/2013 10:28 AM, Kishon Vijay Abraham I wrote:
> commit 92702d (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.
It is a fix for 3.9-rcX?
Regards,
Benoit
>
> Cc: Keerthy <[email protected]>
> Cc: Benoît Cousson <[email protected]>
> Cc: Paul Walmsley <[email protected]>
> Signed-off-by: Kishon Vijay Abraham I <[email protected]>
> ---
> arch/arm/mach-omap2/omap_hwmod_44xx_data.c | 8 +-------
> 1 file changed, 1 insertion(+), 7 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
> index 9e05765..c1fb090 100644
> --- a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
> +++ b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
> @@ -2714,16 +2714,12 @@ 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",
> + .main_clk = "ocp2scp_usb_phy_phy_48m",
> .prcm = {
> .omap4 = {
> .clkctrl_offs = OMAP4_CM_L3INIT_USBPHYOCP2SCP_CLKCTRL_OFFSET,
> @@ -2732,8 +2728,6 @@ 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),
> };
>
> /*
>
Hi,
On Tuesday 09 April 2013 02:24 PM, Benoit Cousson wrote:
> Hi Kishon,
>
> On 04/09/2013 10:28 AM, Kishon Vijay Abraham I wrote:
>> commit 92702d (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.
>
> It is a fix for 3.9-rcX?
Yeah.
Thanks
Kishon
Hi
On Tue, 9 Apr 2013, Kishon Vijay Abraham I wrote:
> commit 92702d (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 <[email protected]>
> Cc: Benoît Cousson <[email protected]>
> Cc: Paul Walmsley <[email protected]>
> Signed-off-by: Kishon Vijay Abraham I <[email protected]>
This patch is missing the "big comment" that I requested in the hwmod
data:
http://marc.info/?l=linux-omap&m=136544098331552&w=2
Once that's added, it should be good to go.
- Paul
From: Kishon Vijay Abraham I <[email protected]>
Commit 92702df3570e ("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 <[email protected]>
Cc: Beno?t Cousson <[email protected]>
Cc: Paul Walmsley <[email protected]>
Signed-off-by: Kishon Vijay Abraham I <[email protected]>
[[email protected]: add comment to the hwmod data to try to prevent any
future mistakes here]
Signed-off-by: Paul Walmsley <[email protected]>
---
Nothing further received from Kishon per the request:
http://marc.info/?l=linux-omap&m=136554118302342&w=2
Since the deadline for v3.9-rc fixes is quite close, have added the
comment myself, and have confirmed that this patch does not cause
additional PM regressions on 4460 Panda-ES in the tests here.
arch/arm/mach-omap2/omap_hwmod_44xx_data.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
index 9e05765..eaba9dc 100644
--- a/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
+++ b/arch/arm/mach-omap2/omap_hwmod_44xx_data.c
@@ -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),
};
/*
--
1.7.10.4
Hi,
On Thursday 11 April 2013 01:11 AM, Paul Walmsley wrote:
> From: Kishon Vijay Abraham I <[email protected]>
>
> Commit 92702df3570e ("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 <[email protected]>
> Cc: Beno?t Cousson <[email protected]>
> Cc: Paul Walmsley <[email protected]>
> Signed-off-by: Kishon Vijay Abraham I <[email protected]>
> [[email protected]: add comment to the hwmod data to try to prevent any
> future mistakes here]
> Signed-off-by: Paul Walmsley <[email protected]>
> ---
>
> Nothing further received from Kishon per the request:
>
> http://marc.info/?l=linux-omap&m=136554118302342&w=2
Sorry. Missed reading this mail.
Thanks
Kishon