diff mbox series

[v3,3/9] clk: qoriq: provide constants for the type

Message ID 20201108185113.31377-4-michael@walle.cc
State Changes Requested, archived
Headers show
Series clk: qoriq fixes and new fsl-flexspi driver | expand

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Context Check Description
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Commit Message

Michael Walle Nov. 8, 2020, 6:51 p.m. UTC 
To avoid future mistakes in the device tree for the clockgen module, add
constants for the clockgen subtype as well as a macro for the PLL
divider.

Signed-off-by: Michael Walle <michael@walle.cc>
---
Changes since v2:
 - new patch

 drivers/clk/clk-qoriq.c                        | 13 +++++++------
 include/dt-bindings/clock/fsl,qoriq-clockgen.h | 15 +++++++++++++++
 2 files changed, 22 insertions(+), 6 deletions(-)
 create mode 100644 include/dt-bindings/clock/fsl,qoriq-clockgen.h

Comments

Rob Herring Nov. 9, 2020, 10:05 p.m. UTC | #1 
On Sun, Nov 08, 2020 at 07:51:07PM +0100, Michael Walle wrote:
> To avoid future mistakes in the device tree for the clockgen module, add
> constants for the clockgen subtype as well as a macro for the PLL
> divider.
> 
> Signed-off-by: Michael Walle <michael@walle.cc>
> ---
> Changes since v2:
>  - new patch
> 
>  drivers/clk/clk-qoriq.c                        | 13 +++++++------
>  include/dt-bindings/clock/fsl,qoriq-clockgen.h | 15 +++++++++++++++
>  2 files changed, 22 insertions(+), 6 deletions(-)
>  create mode 100644 include/dt-bindings/clock/fsl,qoriq-clockgen.h
> 
> diff --git a/drivers/clk/clk-qoriq.c b/drivers/clk/clk-qoriq.c
> index 46101c6a20f2..70aa521e7e7f 100644
> --- a/drivers/clk/clk-qoriq.c
> +++ b/drivers/clk/clk-qoriq.c
> @@ -7,6 +7,7 @@
>  
>  #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
>  
> +#include <dt-bindings/clock/fsl,qoriq-clockgen.h>
>  #include <linux/clk.h>
>  #include <linux/clk-provider.h>
>  #include <linux/clkdev.h>
> @@ -1368,33 +1369,33 @@ static struct clk *clockgen_clk_get(struct of_phandle_args *clkspec, void *data)
>  	idx = clkspec->args[1];
>  
>  	switch (type) {
> -	case 0:
> +	case QORIQ_CLK_SYSCLK:
>  		if (idx != 0)
>  			goto bad_args;
>  		clk = cg->sysclk;
>  		break;
> -	case 1:
> +	case QORIQ_CLK_CMUX:
>  		if (idx >= ARRAY_SIZE(cg->cmux))
>  			goto bad_args;
>  		clk = cg->cmux[idx];
>  		break;
> -	case 2:
> +	case QORIQ_CLK_HWACCEL:
>  		if (idx >= ARRAY_SIZE(cg->hwaccel))
>  			goto bad_args;
>  		clk = cg->hwaccel[idx];
>  		break;
> -	case 3:
> +	case QORIQ_CLK_FMAN:
>  		if (idx >= ARRAY_SIZE(cg->fman))
>  			goto bad_args;
>  		clk = cg->fman[idx];
>  		break;
> -	case 4:
> +	case QORIQ_CLK_PLATFORM_PLL:
>  		pll = &cg->pll[PLATFORM_PLL];
>  		if (idx >= ARRAY_SIZE(pll->div))
>  			goto bad_args;
>  		clk = pll->div[idx].clk;
>  		break;
> -	case 5:
> +	case QORIQ_CLK_CORECLK:
>  		if (idx != 0)
>  			goto bad_args;
>  		clk = cg->coreclk;
> diff --git a/include/dt-bindings/clock/fsl,qoriq-clockgen.h b/include/dt-bindings/clock/fsl,qoriq-clockgen.h
> new file mode 100644
> index 000000000000..ddec7d0bdc7f
> --- /dev/null
> +++ b/include/dt-bindings/clock/fsl,qoriq-clockgen.h
> @@ -0,0 +1,15 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +
> +#ifndef DT_CLOCK_FSL_QORIQ_CLOCKGEN_H
> +#define DT_CLOCK_FSL_QORIQ_CLOCKGEN_H
> +
> +#define QORIQ_CLK_SYSCLK	0
> +#define QORIQ_CLK_CMUX		1
> +#define QORIQ_CLK_HWACCEL	2
> +#define QORIQ_CLK_FMAN		3
> +#define QORIQ_CLK_PLATFORM_PLL	4
> +#define QORIQ_CLK_CORECLK	5
> +
> +#define QORIQ_CLK_PLL_DIV(x)	((x) - 1)

This is not used and doesn't seem like part of the ABI (shared with dts 
files).

> +
> +#endif /* DT_CLOCK_FSL_QORIQ_CLOCKGEN_H */
> -- 
> 2.20.1
>
Michael Walle Nov. 9, 2020, 10:39 p.m. UTC | #2 
Am 2020-11-09 23:05, schrieb Rob Herring:
> On Sun, Nov 08, 2020 at 07:51:07PM +0100, Michael Walle wrote:
>> To avoid future mistakes in the device tree for the clockgen module, 
>> add
>> constants for the clockgen subtype as well as a macro for the PLL
>> divider.
>> 
>> Signed-off-by: Michael Walle <michael@walle.cc>
>> ---
>> Changes since v2:
>>  - new patch
>> 
>>  drivers/clk/clk-qoriq.c                        | 13 +++++++------
>>  include/dt-bindings/clock/fsl,qoriq-clockgen.h | 15 +++++++++++++++
>>  2 files changed, 22 insertions(+), 6 deletions(-)
>>  create mode 100644 include/dt-bindings/clock/fsl,qoriq-clockgen.h
>> 
>> diff --git a/drivers/clk/clk-qoriq.c b/drivers/clk/clk-qoriq.c
>> index 46101c6a20f2..70aa521e7e7f 100644
>> --- a/drivers/clk/clk-qoriq.c
>> +++ b/drivers/clk/clk-qoriq.c
>> @@ -7,6 +7,7 @@
>> 
>>  #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
>> 
>> +#include <dt-bindings/clock/fsl,qoriq-clockgen.h>
>>  #include <linux/clk.h>
>>  #include <linux/clk-provider.h>
>>  #include <linux/clkdev.h>
>> @@ -1368,33 +1369,33 @@ static struct clk *clockgen_clk_get(struct 
>> of_phandle_args *clkspec, void *data)
>>  	idx = clkspec->args[1];
>> 
>>  	switch (type) {
>> -	case 0:
>> +	case QORIQ_CLK_SYSCLK:
>>  		if (idx != 0)
>>  			goto bad_args;
>>  		clk = cg->sysclk;
>>  		break;
>> -	case 1:
>> +	case QORIQ_CLK_CMUX:
>>  		if (idx >= ARRAY_SIZE(cg->cmux))
>>  			goto bad_args;
>>  		clk = cg->cmux[idx];
>>  		break;
>> -	case 2:
>> +	case QORIQ_CLK_HWACCEL:
>>  		if (idx >= ARRAY_SIZE(cg->hwaccel))
>>  			goto bad_args;
>>  		clk = cg->hwaccel[idx];
>>  		break;
>> -	case 3:
>> +	case QORIQ_CLK_FMAN:
>>  		if (idx >= ARRAY_SIZE(cg->fman))
>>  			goto bad_args;
>>  		clk = cg->fman[idx];
>>  		break;
>> -	case 4:
>> +	case QORIQ_CLK_PLATFORM_PLL:
>>  		pll = &cg->pll[PLATFORM_PLL];
>>  		if (idx >= ARRAY_SIZE(pll->div))
>>  			goto bad_args;
>>  		clk = pll->div[idx].clk;
>>  		break;
>> -	case 5:
>> +	case QORIQ_CLK_CORECLK:
>>  		if (idx != 0)
>>  			goto bad_args;
>>  		clk = cg->coreclk;
>> diff --git a/include/dt-bindings/clock/fsl,qoriq-clockgen.h 
>> b/include/dt-bindings/clock/fsl,qoriq-clockgen.h
>> new file mode 100644
>> index 000000000000..ddec7d0bdc7f
>> --- /dev/null
>> +++ b/include/dt-bindings/clock/fsl,qoriq-clockgen.h
>> @@ -0,0 +1,15 @@
>> +/* SPDX-License-Identifier: GPL-2.0-only */
>> +
>> +#ifndef DT_CLOCK_FSL_QORIQ_CLOCKGEN_H
>> +#define DT_CLOCK_FSL_QORIQ_CLOCKGEN_H
>> +
>> +#define QORIQ_CLK_SYSCLK	0
>> +#define QORIQ_CLK_CMUX		1
>> +#define QORIQ_CLK_HWACCEL	2
>> +#define QORIQ_CLK_FMAN		3
>> +#define QORIQ_CLK_PLATFORM_PLL	4
>> +#define QORIQ_CLK_CORECLK	5
>> +
>> +#define QORIQ_CLK_PLL_DIV(x)	((x) - 1)
> 
> This is not used and doesn't seem like part of the ABI (shared with dts
> files).

TBH I haven't found a nice way to integrate this macro into the clock 
driver. It is used in the device tree for the type PLATFORM_PLL.
Previously, you had "<&clockgen 4 1>", where 4 is the PLATFORM_PLL and 1 
is actually "div-by-2". Thus I replaced it by <&clockgen 
QORIQ_CLK_PLATFORM_PLL QORIQ_CLK_PLL_DIV(2)>. (I just realized that 
QORIQ_CLK_PLL_DIV_BY(2) might be a better name.)

I already figured, that this might be a problem, if that macro isn't 
used in the driver.

-michael
Rob Herring Nov. 9, 2020, 10:55 p.m. UTC | #3 
On Mon, Nov 9, 2020 at 4:39 PM Michael Walle <michael@walle.cc> wrote:
>
> Am 2020-11-09 23:05, schrieb Rob Herring:
> > On Sun, Nov 08, 2020 at 07:51:07PM +0100, Michael Walle wrote:
> >> To avoid future mistakes in the device tree for the clockgen module,
> >> add
> >> constants for the clockgen subtype as well as a macro for the PLL
> >> divider.
> >>
> >> Signed-off-by: Michael Walle <michael@walle.cc>
> >> ---
> >> Changes since v2:
> >>  - new patch
> >>
> >>  drivers/clk/clk-qoriq.c                        | 13 +++++++------
> >>  include/dt-bindings/clock/fsl,qoriq-clockgen.h | 15 +++++++++++++++
> >>  2 files changed, 22 insertions(+), 6 deletions(-)
> >>  create mode 100644 include/dt-bindings/clock/fsl,qoriq-clockgen.h
> >>
> >> diff --git a/drivers/clk/clk-qoriq.c b/drivers/clk/clk-qoriq.c
> >> index 46101c6a20f2..70aa521e7e7f 100644
> >> --- a/drivers/clk/clk-qoriq.c
> >> +++ b/drivers/clk/clk-qoriq.c
> >> @@ -7,6 +7,7 @@
> >>
> >>  #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> >>
> >> +#include <dt-bindings/clock/fsl,qoriq-clockgen.h>
> >>  #include <linux/clk.h>
> >>  #include <linux/clk-provider.h>
> >>  #include <linux/clkdev.h>
> >> @@ -1368,33 +1369,33 @@ static struct clk *clockgen_clk_get(struct
> >> of_phandle_args *clkspec, void *data)
> >>      idx = clkspec->args[1];
> >>
> >>      switch (type) {
> >> -    case 0:
> >> +    case QORIQ_CLK_SYSCLK:
> >>              if (idx != 0)
> >>                      goto bad_args;
> >>              clk = cg->sysclk;
> >>              break;
> >> -    case 1:
> >> +    case QORIQ_CLK_CMUX:
> >>              if (idx >= ARRAY_SIZE(cg->cmux))
> >>                      goto bad_args;
> >>              clk = cg->cmux[idx];
> >>              break;
> >> -    case 2:
> >> +    case QORIQ_CLK_HWACCEL:
> >>              if (idx >= ARRAY_SIZE(cg->hwaccel))
> >>                      goto bad_args;
> >>              clk = cg->hwaccel[idx];
> >>              break;
> >> -    case 3:
> >> +    case QORIQ_CLK_FMAN:
> >>              if (idx >= ARRAY_SIZE(cg->fman))
> >>                      goto bad_args;
> >>              clk = cg->fman[idx];
> >>              break;
> >> -    case 4:
> >> +    case QORIQ_CLK_PLATFORM_PLL:
> >>              pll = &cg->pll[PLATFORM_PLL];
> >>              if (idx >= ARRAY_SIZE(pll->div))
> >>                      goto bad_args;
> >>              clk = pll->div[idx].clk;
> >>              break;
> >> -    case 5:
> >> +    case QORIQ_CLK_CORECLK:
> >>              if (idx != 0)
> >>                      goto bad_args;
> >>              clk = cg->coreclk;
> >> diff --git a/include/dt-bindings/clock/fsl,qoriq-clockgen.h
> >> b/include/dt-bindings/clock/fsl,qoriq-clockgen.h
> >> new file mode 100644
> >> index 000000000000..ddec7d0bdc7f
> >> --- /dev/null
> >> +++ b/include/dt-bindings/clock/fsl,qoriq-clockgen.h
> >> @@ -0,0 +1,15 @@
> >> +/* SPDX-License-Identifier: GPL-2.0-only */
> >> +
> >> +#ifndef DT_CLOCK_FSL_QORIQ_CLOCKGEN_H
> >> +#define DT_CLOCK_FSL_QORIQ_CLOCKGEN_H
> >> +
> >> +#define QORIQ_CLK_SYSCLK    0
> >> +#define QORIQ_CLK_CMUX              1
> >> +#define QORIQ_CLK_HWACCEL   2
> >> +#define QORIQ_CLK_FMAN              3
> >> +#define QORIQ_CLK_PLATFORM_PLL      4
> >> +#define QORIQ_CLK_CORECLK   5
> >> +
> >> +#define QORIQ_CLK_PLL_DIV(x)        ((x) - 1)
> >
> > This is not used and doesn't seem like part of the ABI (shared with dts
> > files).
>
> TBH I haven't found a nice way to integrate this macro into the clock
> driver. It is used in the device tree for the type PLATFORM_PLL.
> Previously, you had "<&clockgen 4 1>", where 4 is the PLATFORM_PLL and 1
> is actually "div-by-2". Thus I replaced it by <&clockgen
> QORIQ_CLK_PLATFORM_PLL QORIQ_CLK_PLL_DIV(2)>. (I just realized that
> QORIQ_CLK_PLL_DIV_BY(2) might be a better name.)

Ah okay. I guess this is fine.

Acked-by: Rob Herring <robh@kernel.org>

Rob
diff mbox series

Patch

diff --git a/drivers/clk/clk-qoriq.c b/drivers/clk/clk-qoriq.c
index 46101c6a20f2..70aa521e7e7f 100644
--- a/drivers/clk/clk-qoriq.c
+++ b/drivers/clk/clk-qoriq.c
@@ -7,6 +7,7 @@ 
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
+#include <dt-bindings/clock/fsl,qoriq-clockgen.h>
 #include <linux/clk.h>
 #include <linux/clk-provider.h>
 #include <linux/clkdev.h>
@@ -1368,33 +1369,33 @@  static struct clk *clockgen_clk_get(struct of_phandle_args *clkspec, void *data)
 	idx = clkspec->args[1];
 
 	switch (type) {
-	case 0:
+	case QORIQ_CLK_SYSCLK:
 		if (idx != 0)
 			goto bad_args;
 		clk = cg->sysclk;
 		break;
-	case 1:
+	case QORIQ_CLK_CMUX:
 		if (idx >= ARRAY_SIZE(cg->cmux))
 			goto bad_args;
 		clk = cg->cmux[idx];
 		break;
-	case 2:
+	case QORIQ_CLK_HWACCEL:
 		if (idx >= ARRAY_SIZE(cg->hwaccel))
 			goto bad_args;
 		clk = cg->hwaccel[idx];
 		break;
-	case 3:
+	case QORIQ_CLK_FMAN:
 		if (idx >= ARRAY_SIZE(cg->fman))
 			goto bad_args;
 		clk = cg->fman[idx];
 		break;
-	case 4:
+	case QORIQ_CLK_PLATFORM_PLL:
 		pll = &cg->pll[PLATFORM_PLL];
 		if (idx >= ARRAY_SIZE(pll->div))
 			goto bad_args;
 		clk = pll->div[idx].clk;
 		break;
-	case 5:
+	case QORIQ_CLK_CORECLK:
 		if (idx != 0)
 			goto bad_args;
 		clk = cg->coreclk;
diff --git a/include/dt-bindings/clock/fsl,qoriq-clockgen.h b/include/dt-bindings/clock/fsl,qoriq-clockgen.h
new file mode 100644
index 000000000000..ddec7d0bdc7f
--- /dev/null
+++ b/include/dt-bindings/clock/fsl,qoriq-clockgen.h
@@ -0,0 +1,15 @@ 
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef DT_CLOCK_FSL_QORIQ_CLOCKGEN_H
+#define DT_CLOCK_FSL_QORIQ_CLOCKGEN_H
+
+#define QORIQ_CLK_SYSCLK	0
+#define QORIQ_CLK_CMUX		1
+#define QORIQ_CLK_HWACCEL	2
+#define QORIQ_CLK_FMAN		3
+#define QORIQ_CLK_PLATFORM_PLL	4
+#define QORIQ_CLK_CORECLK	5
+
+#define QORIQ_CLK_PLL_DIV(x)	((x) - 1)
+
+#endif /* DT_CLOCK_FSL_QORIQ_CLOCKGEN_H */