[PATCH] PRCM: Combine 34xx l3_icks and l4_icks

[PATCH] PRCM: Combine 34xx l3_icks and l4_icks

[Högander Jouni]

E.g dss_l3_ick and dss_l4_ick have same gating control. Having own
clock for both of them causes race condition between enable / disable.

This patch combines this kind of clocks and names new clock as <module>_ick.

Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com>
---
 arch/arm/mach-omap2/clock34xx.h |   62 +++++++++++++++------------------------
 1 files changed, 24 insertions(+), 38 deletions(-)

diff --git a/arch/arm/mach-omap2/clock34xx.h b/arch/arm/mach-omap2/clock34xx.h
index 4b1dd71..85afe1e 100644
--- a/arch/arm/mach-omap2/clock34xx.h
+++ b/arch/arm/mach-omap2/clock34xx.h
@@ -1200,27 +1200,34 @@ static const struct clksel gfx_l3_clksel[] = {
 	{ .parent = NULL }
 };
 
-static struct clk gfx_l3_fck = {
-	.name		= "gfx_l3_fck",
+/* Virtual parent clock for gfx_l3_ick and gfx_l3_fck */
+static struct clk gfx_l3_ck = {
+	.name		= "gfx_l3_ck",
 	.parent		= &l3_ick,
 	.init		= &omap2_init_clksel_parent,
 	.enable_reg	= OMAP_CM_REGADDR(GFX_MOD, CM_ICLKEN),
 	.enable_bit	= OMAP_EN_GFX_SHIFT,
+	.flags		= CLOCK_IN_OMAP3430ES1,
+	.recalc		= &followparent_recalc,
+};
+
+static struct clk gfx_l3_fck = {
+	.name		= "gfx_l3_fck",
+	.parent		= &gfx_l3_ck,
+	.init		= &omap2_init_clksel_parent,
 	.clksel_reg	= OMAP_CM_REGADDR(GFX_MOD, CM_CLKSEL),
 	.clksel_mask	= OMAP_CLKSEL_GFX_MASK,
 	.clksel		= gfx_l3_clksel,
-	.flags		= CLOCK_IN_OMAP3430ES1 | RATE_PROPAGATES,
+	.flags		= CLOCK_IN_OMAP3430ES1 | RATE_PROPAGATES |
+				PARENT_CONTROLS_CLOCK,
 	.clkdm_name	= "gfx_3430es1_clkdm",
 	.recalc		= &omap2_clksel_recalc,
 };
 
 static struct clk gfx_l3_ick = {
 	.name		= "gfx_l3_ick",
-	.parent		= &l3_ick,
-	.init		= &omap2_init_clk_clkdm,
-	.enable_reg	= OMAP_CM_REGADDR(GFX_MOD, CM_ICLKEN),
-	.enable_bit	= OMAP_EN_GFX_SHIFT,
-	.flags		= CLOCK_IN_OMAP3430ES1,
+	.parent		= &gfx_l3_ck,
+	.flags		= CLOCK_IN_OMAP3430ES1 | PARENT_CONTROLS_CLOCK,
 	.clkdm_name	= "gfx_3430es1_clkdm",
 	.recalc		= &followparent_recalc,
 };
@@ -2160,19 +2167,9 @@ static struct clk cam_mclk = {
 	.recalc		= &omap2_clksel_recalc,
 };
 
-static struct clk cam_l3_ick = {
-	.name		= "cam_l3_ick",
-	.parent		= &l3_ick,
-	.init		= &omap2_init_clk_clkdm,
-	.enable_reg	= OMAP_CM_REGADDR(OMAP3430_CAM_MOD, CM_ICLKEN),
-	.enable_bit	= OMAP3430_EN_CAM_SHIFT,
-	.flags		= CLOCK_IN_OMAP343X,
-	.clkdm_name	= "cam_clkdm",
-	.recalc		= &followparent_recalc,
-};
-
-static struct clk cam_l4_ick = {
-	.name		= "cam_l4_ick",
+static struct clk cam_ick = {
+	/* Handles both L3 and L4 clocks */
+	.name		= "cam_ick",
 	.parent		= &l4_ick,
 	.init		= &omap2_init_clk_clkdm,
 	.enable_reg	= OMAP_CM_REGADDR(OMAP3430_CAM_MOD, CM_ICLKEN),
@@ -2206,19 +2203,9 @@ static struct clk usbhost_48m_fck = {
 	.recalc		= &followparent_recalc,
 };
 
-static struct clk usbhost_l3_ick = {
-	.name		= "usbhost_l3_ick",
-	.parent		= &l3_ick,
-	.init		= &omap2_init_clk_clkdm,
-	.enable_reg	= OMAP_CM_REGADDR(OMAP3430ES2_USBHOST_MOD, CM_ICLKEN),
-	.enable_bit	= OMAP3430ES2_EN_USBHOST_SHIFT,
-	.flags		= CLOCK_IN_OMAP3430ES2,
-	.clkdm_name	= "usbhost_clkdm",
-	.recalc		= &followparent_recalc,
-};
-
-static struct clk usbhost_l4_ick = {
-	.name		= "usbhost_l4_ick",
+static struct clk usbhost_ick = {
+	/* Handles both L3 and L4 clocks */
+	.name		= "usbhost_ick",
 	.parent		= &l4_ick,
 	.init		= &omap2_init_clk_clkdm,
 	.enable_reg	= OMAP_CM_REGADDR(OMAP3430ES2_USBHOST_MOD, CM_ICLKEN),
@@ -3094,6 +3081,7 @@ static struct clk *onchip_34xx_clks[] __initdata = {
 	&l3_ick,
 	&l4_ick,
 	&rm_ick,
+	&gfx_l3_ck,
 	&gfx_l3_fck,
 	&gfx_l3_ick,
 	&gfx_cg1_ck,
@@ -3175,12 +3163,10 @@ static struct clk *onchip_34xx_clks[] __initdata = {
 	&dss2_alwon_fck,
 	&dss_ick,
 	&cam_mclk,
-	&cam_l3_ick,
-	&cam_l4_ick,
+	&cam_ick,
 	&usbhost_120m_fck,
 	&usbhost_48m_fck,
-	&usbhost_l3_ick,
-	&usbhost_l4_ick,
+	&usbhost_ick,
 	&usbhost_sar_fck,
 	&usim_fck,
 	&gpt1_fck,
-- 
1.5.5

Re: [PATCH] PRCM: Combine 34xx l3_icks and l4_icks

[Felipe Balbi]

On Mon, 28 Apr 2008 11:29:53 +0300, jouni.hogander@nokia.com (Högander
Jouni) wrote:
> E.g dss_l3_ick and dss_l4_ick have same gating control. Having own
> clock for both of them causes race condition between enable / disable.
> 
> This patch combines this kind of clocks and names new clock as
> <module>_ick.
> 
> Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com>

Good, the following patch fixes ehci-omap.c after clock name change :-)

Could you check, please:

From 4102f3ad5db10e662633c0f9ddee6aca43fec8e6 Mon Sep 17 00:00:00 2001
From: Felipe Balbi <felipe.balbi@nokia.com>
Date: Mon, 28 Apr 2008 13:45:49 +0300
Subject: [PATCH] USB: EHCI: Fix clock name for ehci-omap.c
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit

Patch from Jouni Högander changed usbhost_l4_ick to
usbhost_ick, fixing in ehci-omap.c

Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Cc: Jouni Högander <jouni.hogander@nokia.com>
---
 drivers/usb/host/ehci-omap.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
index 495c979..be93c69 100644
--- a/drivers/usb/host/ehci-omap.c
+++ b/drivers/usb/host/ehci-omap.c
@@ -73,7 +73,7 @@ struct ehci_omap_clock_defs {
 };
 
 /* Clock names as per clock framework: May change so keep as #defs */
-#define USBHOST_ICKL	"usbhost_l4_ick"
+#define USBHOST_ICKL	"usbhost_ick"
 #define USBHOST_120M_FCLK	"usbhost_120m_fck"
 #define USBHOST_48M_FCLK	"usbhost_48m_fck"
 #define USBHOST_TLL_ICKL	"usbtll_ick"
-- 
1.5.5.1.57.g5909c



-- 
Best Regards,

Felipe Balbi
http://felipebalbi.com
me@felipebalbi.com

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Re: [PATCH] PRCM: Combine 34xx l3_icks and l4_icks

[Högander Jouni]

"ext Felipe Balbi" <me@felipebalbi.com> writes:

> On Mon, 28 Apr 2008 11:29:53 +0300, jouni.hogander@nokia.com (Högander
> Jouni) wrote:
>> E.g dss_l3_ick and dss_l4_ick have same gating control. Having own
>> clock for both of them causes race condition between enable / disable.
>> 
>> This patch combines this kind of clocks and names new clock as
>> <module>_ick.
>> 
>> Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com>
>
> Good, the following patch fixes ehci-omap.c after clock name change
> :-)

Sorry, I should have used grep here. I did it now. There are no
other references to changed clock names than this you pointed out. I
checked caḿ_l3_ick, cam_l4_ick, usbhost_l3_ick, usbhost_l4_ick.

Yes, your patch needs to be applied if "[PATCH] PRCM: Combine 34xx
l3_icks and l4_icks" is applied.

>
> Could you check, please:
>
> From 4102f3ad5db10e662633c0f9ddee6aca43fec8e6 Mon Sep 17 00:00:00 2001
> From: Felipe Balbi <felipe.balbi@nokia.com>
> Date: Mon, 28 Apr 2008 13:45:49 +0300
> Subject: [PATCH] USB: EHCI: Fix clock name for ehci-omap.c
> MIME-Version: 1.0
> Content-Type: text/plain; charset=utf-8
> Content-Transfer-Encoding: 8bit
>
> Patch from Jouni Högander changed usbhost_l4_ick to
> usbhost_ick, fixing in ehci-omap.c
>
> Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
> Cc: Jouni Högander <jouni.hogander@nokia.com>
> ---
>  drivers/usb/host/ehci-omap.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
> index 495c979..be93c69 100644
> --- a/drivers/usb/host/ehci-omap.c
> +++ b/drivers/usb/host/ehci-omap.c
> @@ -73,7 +73,7 @@ struct ehci_omap_clock_defs {
>  };
>  
>  /* Clock names as per clock framework: May change so keep as #defs */
> -#define USBHOST_ICKL	"usbhost_l4_ick"
> +#define USBHOST_ICKL	"usbhost_ick"
>  #define USBHOST_120M_FCLK	"usbhost_120m_fck"
>  #define USBHOST_48M_FCLK	"usbhost_48m_fck"
>  #define USBHOST_TLL_ICKL	"usbtll_ick"
> -- 
> 1.5.5.1.57.g5909c
>
>
>
> -- 
> Best Regards,
>
> Felipe Balbi
> http://felipebalbi.com
> me@felipebalbi.com
>

-- 
Jouni Högander

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Re: [PATCH] PRCM: Combine 34xx l3_icks and l4_icks

[Paul Walmsley]

[-- Attachment #1: Type: TEXT/PLAIN, Size: 501 bytes --]

On Mon, 28 Apr 2008, Högander Jouni wrote:

> E.g dss_l3_ick and dss_l4_ick have same gating control. Having own
> clock for both of them causes race condition between enable / disable.
> 
> This patch combines this kind of clocks and names new clock as <module>_ick.
> 
> Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com>

Acked-by: Paul Walmsley <paul@pwsan.com>

although it's less of a race issue, than it is a convenience issue for 
OMAP2/3 device driver folks...



- Paul

Re: [PATCH] PRCM: Combine 34xx l3_icks and l4_icks

[Tony Lindgren]

* Paul Walmsley <paul@pwsan.com> [080428 23:58]:
> On Mon, 28 Apr 2008, Högander Jouni wrote:
> 
> > E.g dss_l3_ick and dss_l4_ick have same gating control. Having own
> > clock for both of them causes race condition between enable / disable.
> > 
> > This patch combines this kind of clocks and names new clock as <module>_ick.
> > 
> > Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com>
> 
> Acked-by: Paul Walmsley <paul@pwsan.com>
> 
> although it's less of a race issue, than it is a convenience issue for 
> OMAP2/3 device driver folks...

Pushing today, with Felipe's fix merged into this.

Tony
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Re: [PATCH] PRCM: Combine 34xx l3_icks and l4_icks

[Tony Lindgren]

* Högander Jouni <jouni.hogander@nokia.com> [080428 23:50]:
> "ext Felipe Balbi" <me@felipebalbi.com> writes:
> 
> > On Mon, 28 Apr 2008 11:29:53 +0300, jouni.hogander@nokia.com (Högander
> > Jouni) wrote:
> >> E.g dss_l3_ick and dss_l4_ick have same gating control. Having own
> >> clock for both of them causes race condition between enable / disable.
> >> 
> >> This patch combines this kind of clocks and names new clock as
> >> <module>_ick.
> >> 
> >> Signed-off-by: Jouni Hogander <jouni.hogander@nokia.com>
> >
> > Good, the following patch fixes ehci-omap.c after clock name change
> > :-)
> 
> Sorry, I should have used grep here. I did it now. There are no
> other references to changed clock names than this you pointed out. I
> checked caḿ_l3_ick, cam_l4_ick, usbhost_l3_ick, usbhost_l4_ick.
> 
> Yes, your patch needs to be applied if "[PATCH] PRCM: Combine 34xx
> l3_icks and l4_icks" is applied.

I've merged this into Jouni's patch.

Tony

> >
> > Could you check, please:
> >
> > From 4102f3ad5db10e662633c0f9ddee6aca43fec8e6 Mon Sep 17 00:00:00 2001
> > From: Felipe Balbi <felipe.balbi@nokia.com>
> > Date: Mon, 28 Apr 2008 13:45:49 +0300
> > Subject: [PATCH] USB: EHCI: Fix clock name for ehci-omap.c
> > MIME-Version: 1.0
> > Content-Type: text/plain; charset=utf-8
> > Content-Transfer-Encoding: 8bit
> >
> > Patch from Jouni Högander changed usbhost_l4_ick to
> > usbhost_ick, fixing in ehci-omap.c
> >
> > Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
> > Cc: Jouni Högander <jouni.hogander@nokia.com>
> > ---
> >  drivers/usb/host/ehci-omap.c |    2 +-
> >  1 files changed, 1 insertions(+), 1 deletions(-)
> >
> > diff --git a/drivers/usb/host/ehci-omap.c b/drivers/usb/host/ehci-omap.c
> > index 495c979..be93c69 100644
> > --- a/drivers/usb/host/ehci-omap.c
> > +++ b/drivers/usb/host/ehci-omap.c
> > @@ -73,7 +73,7 @@ struct ehci_omap_clock_defs {
> >  };
> >  
> >  /* Clock names as per clock framework: May change so keep as #defs */
> > -#define USBHOST_ICKL	"usbhost_l4_ick"
> > +#define USBHOST_ICKL	"usbhost_ick"
> >  #define USBHOST_120M_FCLK	"usbhost_120m_fck"
> >  #define USBHOST_48M_FCLK	"usbhost_48m_fck"
> >  #define USBHOST_TLL_ICKL	"usbtll_ick"
> > -- 
> > 1.5.5.1.57.g5909c
> >
> >
> >
> > -- 
> > Best Regards,
> >
> > Felipe Balbi
> > http://felipebalbi.com
> > me@felipebalbi.com
> >
> 
> -- 
> Jouni Högander
> 
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