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[PATCH 0/2] pwm: add pwm AO on meson gx

Started byJerome Brunet <jbrunet@baylibre.com>
First post2017-06-07 15:40 +0200
Last post2017-06-07 15:40 +0200
Articles 4 — 2 participants

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  [PATCH 0/2] pwm: add pwm AO on meson gx Jerome Brunet <jbrunet@baylibre.com> - 2017-06-07 15:40 +0200
    Re: [PATCH 2/2] pwm: meson: add compatible for the gxbb ao pwms Neil Armstrong <narmstrong@baylibre.com> - 2017-06-07 15:40 +0200
    [PATCH 1/2] dt-bindings: pwm: meson: add comptabible for gxbb ao pwms Jerome Brunet <jbrunet@baylibre.com> - 2017-06-07 15:40 +0200
    [PATCH 2/2] pwm: meson: add compatible for the gxbb ao pwms Jerome Brunet <jbrunet@baylibre.com> - 2017-06-07 15:40 +0200

#1659801 — [PATCH 0/2] pwm: add pwm AO on meson gx

FromJerome Brunet <jbrunet@baylibre.com>
Date2017-06-07 15:40 +0200
Subject[PATCH 0/2] pwm: add pwm AO on meson gx
Message-ID<tPJlM-7eC-7@gated-at.bofh.it>
The pwms found in the AO domain of the meson gx family have different
clock sources than the one found in the EE domain. The AO pwms have only
2 connected clock input which are clk81 and the crytal.

This patchset adds the necessary compatible and the clock data for it.

Jerome Brunet (2):
  dt-bindings: pwm: meson: add comptabible for gxbb ao pwms
  pwm: meson: add compatible for the gxbb ao pwms

 .../devicetree/bindings/pwm/pwm-meson.txt          |  4 ++-
 drivers/pwm/pwm-meson.c                            | 32 ++++++++++++++++++++--
 2 files changed, 32 insertions(+), 4 deletions(-)

-- 
2.9.4

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#1659802 — Re: [PATCH 2/2] pwm: meson: add compatible for the gxbb ao pwms

FromNeil Armstrong <narmstrong@baylibre.com>
Date2017-06-07 15:40 +0200
SubjectRe: [PATCH 2/2] pwm: meson: add compatible for the gxbb ao pwms
Message-ID<tPJlM-7eC-13@gated-at.bofh.it>
In reply to#1659801
On 06/07/2017 03:30 PM, Jerome Brunet wrote:
> On the gxbb (and gxl) family, the PWMs of the AO domain require a
> specific compatible because the possible input clocks are different
> from the EE PWMs input clocks.
> 
> Since the number of possible input clocks is also different, the
> 'num_parents' field is added to all the meson pwm data.
> 
> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
> ---
>  drivers/pwm/pwm-meson.c | 32 +++++++++++++++++++++++++++++---
>  1 file changed, 29 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c
> index 045ef9fa6fe3..a385fcc5cfad 100644
> --- a/drivers/pwm/pwm-meson.c
> +++ b/drivers/pwm/pwm-meson.c
> @@ -103,6 +103,7 @@ struct meson_pwm_channel {
>  
>  struct meson_pwm_data {
>  	const char * const *parent_names;
> +	int num_parents;
>  };
>  
>  struct meson_pwm {
> @@ -381,6 +382,7 @@ static const char * const pwm_meson8b_parent_names[] = {
>  
>  static const struct meson_pwm_data pwm_meson8b_data = {
>  	.parent_names = pwm_meson8b_parent_names,
> +	.num_parents = ARRAY_SIZE(pwm_meson8b_parent_names),
>  };
>  
>  static const char * const pwm_gxbb_parent_names[] = {
> @@ -389,11 +391,35 @@ static const char * const pwm_gxbb_parent_names[] = {
>  
>  static const struct meson_pwm_data pwm_gxbb_data = {
>  	.parent_names = pwm_gxbb_parent_names,
> +	.num_parents = ARRAY_SIZE(pwm_gxbb_parent_names),
> +};
> +
> +/*
> + * Only the 2 first inputs of the GXBB AO PWMs are valid
> + * The last 2 are grounded
> + */
> +static const char * const pwm_gxbb_ao_parent_names[] = {
> +	"clk81", "xtal"
> +};
> +
> +static const struct meson_pwm_data pwm_gxbb_ao_data = {
> +	.parent_names = pwm_gxbb_ao_parent_names,
> +	.num_parents = ARRAY_SIZE(pwm_gxbb_ao_parent_names),
>  };
>  
>  static const struct of_device_id meson_pwm_matches[] = {
> -	{ .compatible = "amlogic,meson8b-pwm", .data = &pwm_meson8b_data },
> -	{ .compatible = "amlogic,meson-gxbb-pwm", .data = &pwm_gxbb_data },
> +	{
> +		.compatible = "amlogic,meson8b-pwm",
> +		.data = &pwm_meson8b_data
> +	},
> +	{
> +		.compatible = "amlogic,meson-gxbb-pwm",
> +		.data = &pwm_gxbb_data
> +	},
> +	{
> +		.compatible = "amlogic,meson-gxbb-ao-pwm",
> +		.data = &pwm_gxbb_ao_data
> +	},
>  	{},
>  };
>  MODULE_DEVICE_TABLE(of, meson_pwm_matches);
> @@ -417,7 +443,7 @@ static int meson_pwm_init_channels(struct meson_pwm *meson,
>  		init.ops = &clk_mux_ops;
>  		init.flags = CLK_IS_BASIC;
>  		init.parent_names = meson->data->parent_names;
> -		init.num_parents = 1 << MISC_CLK_SEL_WIDTH;
> +		init.num_parents = meson->data->num_parents;
>  
>  		channel->mux.reg = meson->base + REG_MISC_AB;
>  		channel->mux.shift = mux_reg_shifts[i];
> 

Acked-by: Neil Armstrong <narmstrong@baylibre.com>

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#1659803 — [PATCH 1/2] dt-bindings: pwm: meson: add comptabible for gxbb ao pwms

FromJerome Brunet <jbrunet@baylibre.com>
Date2017-06-07 15:40 +0200
Subject[PATCH 1/2] dt-bindings: pwm: meson: add comptabible for gxbb ao pwms
Message-ID<tPJlM-7eC-9@gated-at.bofh.it>
In reply to#1659801
Add compatible string to properly handle the PWMs found in the AO domain
of the gxbb (and gxl) family

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
 Documentation/devicetree/bindings/pwm/pwm-meson.txt | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/pwm/pwm-meson.txt b/Documentation/devicetree/bindings/pwm/pwm-meson.txt
index 5376a4468cb6..5b07bebbf6f7 100644
--- a/Documentation/devicetree/bindings/pwm/pwm-meson.txt
+++ b/Documentation/devicetree/bindings/pwm/pwm-meson.txt
@@ -2,7 +2,9 @@ Amlogic Meson PWM Controller
 ============================
 
 Required properties:
-- compatible: Shall contain "amlogic,meson8b-pwm" or "amlogic,meson-gxbb-pwm".
+- compatible: Shall contain "amlogic,meson8b-pwm"
+                         or "amlogic,meson-gxbb-pwm"
+                         or "amlogic,meson-gxbb-ao-pwm"
 - #pwm-cells: Should be 3. See pwm.txt in this directory for a description of
   the cells format.
 
-- 
2.9.4

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#1659807 — [PATCH 2/2] pwm: meson: add compatible for the gxbb ao pwms

FromJerome Brunet <jbrunet@baylibre.com>
Date2017-06-07 15:40 +0200
Subject[PATCH 2/2] pwm: meson: add compatible for the gxbb ao pwms
Message-ID<tPJlM-7eC-15@gated-at.bofh.it>
In reply to#1659801
On the gxbb (and gxl) family, the PWMs of the AO domain require a
specific compatible because the possible input clocks are different
from the EE PWMs input clocks.

Since the number of possible input clocks is also different, the
'num_parents' field is added to all the meson pwm data.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
---
 drivers/pwm/pwm-meson.c | 32 +++++++++++++++++++++++++++++---
 1 file changed, 29 insertions(+), 3 deletions(-)

diff --git a/drivers/pwm/pwm-meson.c b/drivers/pwm/pwm-meson.c
index 045ef9fa6fe3..a385fcc5cfad 100644
--- a/drivers/pwm/pwm-meson.c
+++ b/drivers/pwm/pwm-meson.c
@@ -103,6 +103,7 @@ struct meson_pwm_channel {
 
 struct meson_pwm_data {
 	const char * const *parent_names;
+	int num_parents;
 };
 
 struct meson_pwm {
@@ -381,6 +382,7 @@ static const char * const pwm_meson8b_parent_names[] = {
 
 static const struct meson_pwm_data pwm_meson8b_data = {
 	.parent_names = pwm_meson8b_parent_names,
+	.num_parents = ARRAY_SIZE(pwm_meson8b_parent_names),
 };
 
 static const char * const pwm_gxbb_parent_names[] = {
@@ -389,11 +391,35 @@ static const char * const pwm_gxbb_parent_names[] = {
 
 static const struct meson_pwm_data pwm_gxbb_data = {
 	.parent_names = pwm_gxbb_parent_names,
+	.num_parents = ARRAY_SIZE(pwm_gxbb_parent_names),
+};
+
+/*
+ * Only the 2 first inputs of the GXBB AO PWMs are valid
+ * The last 2 are grounded
+ */
+static const char * const pwm_gxbb_ao_parent_names[] = {
+	"clk81", "xtal"
+};
+
+static const struct meson_pwm_data pwm_gxbb_ao_data = {
+	.parent_names = pwm_gxbb_ao_parent_names,
+	.num_parents = ARRAY_SIZE(pwm_gxbb_ao_parent_names),
 };
 
 static const struct of_device_id meson_pwm_matches[] = {
-	{ .compatible = "amlogic,meson8b-pwm", .data = &pwm_meson8b_data },
-	{ .compatible = "amlogic,meson-gxbb-pwm", .data = &pwm_gxbb_data },
+	{
+		.compatible = "amlogic,meson8b-pwm",
+		.data = &pwm_meson8b_data
+	},
+	{
+		.compatible = "amlogic,meson-gxbb-pwm",
+		.data = &pwm_gxbb_data
+	},
+	{
+		.compatible = "amlogic,meson-gxbb-ao-pwm",
+		.data = &pwm_gxbb_ao_data
+	},
 	{},
 };
 MODULE_DEVICE_TABLE(of, meson_pwm_matches);
@@ -417,7 +443,7 @@ static int meson_pwm_init_channels(struct meson_pwm *meson,
 		init.ops = &clk_mux_ops;
 		init.flags = CLK_IS_BASIC;
 		init.parent_names = meson->data->parent_names;
-		init.num_parents = 1 << MISC_CLK_SEL_WIDTH;
+		init.num_parents = meson->data->num_parents;
 
 		channel->mux.reg = meson->base + REG_MISC_AB;
 		channel->mux.shift = mux_reg_shifts[i];
-- 
2.9.4

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