[PATCH v3 0/7] Add basic microphone detection bindings

[PATCH v3 0/7] Add basic microphone detection bindings

[Charles Keepax]

This series adds basic microphone detection DT/ACPI bindings
using the device properties API.

The MFD parts and the extcon parts can go seperately through
there respective trees, but I sent them together so everyone
can see what is going on. There is no build dependency
although the MFD patch will fix a couple of Sparse warnings
that you get if using -Wsparse-all.

Changes since v1:
 - Removed double include of property.h

Changes since v2:
 - Removed check for CONFIG_OF to call
   arizona_extcon_device_get_pdata.
 - Add some defines for the pdata values of micd-dbtime.
 - Factor out the initial gpio level for the micd-pol-gpio.
 - Don't check if null before calling gpiod_set_value_cansleep.
 - Added a comment to explain why we can't use devm for gpiod.
 - Added patch to make some small corrections to the jack
   detection into this series to keep them all together for
   easy of applying.

Thanks,
Charles

Charles Keepax (7):
  extcon: arizona: Factor out initial GPIO state
  extcon: arizona: Update to use the new device properties API
  extcon: arizona: Add basic microphone detection DT/ACPI bindings
  extcon: arizona: Convert to gpiod
  extcon: arizona: Ensure variables are set for headphone detection
  mfd: arizona: Update DT doc for new mic detection bindings
  mfd: arizona: Update several pdata members to unsigned

 Documentation/devicetree/bindings/mfd/arizona.txt |   16 ++++
 drivers/extcon/extcon-arizona.c                   |   97 +++++++++++++++++----
 include/linux/mfd/arizona/pdata.h                 |   15 ++--
 3 files changed, 106 insertions(+), 22 deletions(-)

-- 
1.7.2.5

[PATCH v3 1/7] extcon: arizona: Factor out initial GPIO state

[Charles Keepax]

Signed-off-by: Charles Keepax <ckeepax-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
---
 drivers/extcon/extcon-arizona.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index 9262b45..e31613a 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -1135,6 +1135,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
 	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
 	struct arizona_pdata *pdata = &arizona->pdata;
 	struct arizona_extcon_info *info;
+	int gpio_initial_level;
 	unsigned int val;
 	unsigned int clamp_mode;
 	int jack_irq_fall, jack_irq_rise;
@@ -1226,8 +1227,9 @@ static int arizona_extcon_probe(struct platform_device *pdev)
 		info->micd_num_modes = ARRAY_SIZE(micd_default_modes);
 	}
 
+	gpio_initial_level = info->micd_modes[0].gpio;
 	if (arizona->pdata.micd_pol_gpio > 0) {
-		if (info->micd_modes[0].gpio)
+		if (gpio_initial_level)
 			mode = GPIOF_OUT_INIT_HIGH;
 		else
 			mode = GPIOF_OUT_INIT_LOW;
-- 
1.7.2.5

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[PATCH v3 2/7] extcon: arizona: Update to use the new device properties API

[Charles Keepax]

The device properties API will load data from both device tree and ACPI,
update the binding to use this API instead of the OF API.

Signed-off-by: Charles Keepax <ckeepax-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
---
 drivers/extcon/extcon-arizona.c |   11 +++++------
 1 files changed, 5 insertions(+), 6 deletions(-)

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index e31613a..d990495 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -24,6 +24,7 @@
 #include <linux/input.h>
 #include <linux/platform_device.h>
 #include <linux/pm_runtime.h>
+#include <linux/property.h>
 #include <linux/regulator/consumer.h>
 #include <linux/extcon.h>
 
@@ -1110,12 +1111,12 @@ static void arizona_micd_set_level(struct arizona *arizona, int index,
 	regmap_update_bits(arizona->regmap, reg, mask, level);
 }
 
-static int arizona_extcon_of_get_pdata(struct arizona *arizona)
+static int arizona_extcon_device_get_pdata(struct arizona *arizona)
 {
 	struct arizona_pdata *pdata = &arizona->pdata;
 	unsigned int val = ARIZONA_ACCDET_MODE_HPL;
 
-	of_property_read_u32(arizona->dev->of_node, "wlf,hpdet-channel", &val);
+	device_property_read_u32(arizona->dev, "wlf,hpdet-channel", &val);
 	switch (val) {
 	case ARIZONA_ACCDET_MODE_HPL:
 	case ARIZONA_ACCDET_MODE_HPR:
@@ -1148,10 +1149,8 @@ static int arizona_extcon_probe(struct platform_device *pdev)
 	if (!info)
 		return -ENOMEM;
 
-	if (IS_ENABLED(CONFIG_OF)) {
-		if (!dev_get_platdata(arizona->dev))
-			arizona_extcon_of_get_pdata(arizona);
-	}
+	if (!dev_get_platdata(arizona->dev))
+		arizona_extcon_device_get_pdata(arizona);
 
 	info->micvdd = devm_regulator_get(&pdev->dev, "MICVDD");
 	if (IS_ERR(info->micvdd)) {
-- 
1.7.2.5

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[PATCH v3 3/7] extcon: arizona: Add basic microphone detection DT/ACPI bindings

[Charles Keepax]

This patch adds bindings for the basic microphone detection platform
data.

Signed-off-by: Charles Keepax <ckeepax-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
---
 drivers/extcon/extcon-arizona.c   |   30 ++++++++++++++++++++++++++++++
 include/linux/mfd/arizona/pdata.h |    3 +++
 2 files changed, 33 insertions(+), 0 deletions(-)

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index d990495..6826d99 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -1115,6 +1115,7 @@ static int arizona_extcon_device_get_pdata(struct arizona *arizona)
 {
 	struct arizona_pdata *pdata = &arizona->pdata;
 	unsigned int val = ARIZONA_ACCDET_MODE_HPL;
+	unsigned int num_debounces;
 
 	device_property_read_u32(arizona->dev, "wlf,hpdet-channel", &val);
 	switch (val) {
@@ -1128,6 +1129,35 @@ static int arizona_extcon_device_get_pdata(struct arizona *arizona)
 		pdata->hpdet_channel = ARIZONA_ACCDET_MODE_HPL;
 	}
 
+	device_property_read_u32(arizona->dev, "wlf,micd-detect-debounce",
+				 &pdata->micd_detect_debounce);
+
+	device_property_read_u32(arizona->dev, "wlf,micd-bias-start-time",
+				 &pdata->micd_bias_start_time);
+
+	device_property_read_u32(arizona->dev, "wlf,micd-rate",
+				 &pdata->micd_rate);
+
+	num_debounces = 0;
+	device_property_read_u32(arizona->dev, "wlf,micd-dbtime",
+				 &num_debounces);
+	switch (num_debounces) {
+	case 2:
+		pdata->micd_dbtime = ARIZONA_MICD_DBTIME_TWO_DEBOUNCES;
+		break;
+	case 4:
+		pdata->micd_dbtime = ARIZONA_MICD_DBTIME_FOUR_DEBOUNCES;
+		break;
+	default:
+		break;
+	}
+
+	device_property_read_u32(arizona->dev, "wlf,micd-timeout",
+				 &pdata->micd_timeout);
+
+	pdata->micd_force_micbias = device_property_read_bool(arizona->dev,
+						"wlf,micd-force-micbias");
+
 	return 0;
 }
 
diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h
index aa5c48b..af44081 100644
--- a/include/linux/mfd/arizona/pdata.h
+++ b/include/linux/mfd/arizona/pdata.h
@@ -53,6 +53,9 @@
 
 #define ARIZONA_MAX_PDM_SPK 2
 
+#define ARIZONA_MICD_DBTIME_TWO_DEBOUNCES 0x10000
+#define ARIZONA_MICD_DBTIME_FOUR_DEBOUNCES 0x0001
+
 struct regulator_init_data;
 
 struct arizona_micbias {
-- 
1.7.2.5

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[PATCH v3 4/7] extcon: arizona: Convert to gpiod

[Charles Keepax]

Convert to using the newer gpiod interface for the micd_pol_gpio.
Although we still carry support for the old gpio interface from pdata.

Signed-off-by: Charles Keepax <ckeepax-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
---
 drivers/extcon/extcon-arizona.c |   41 ++++++++++++++++++++++++++++++++++----
 1 files changed, 36 insertions(+), 5 deletions(-)

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index 6826d99..eb8cf74 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -20,6 +20,7 @@
 #include <linux/slab.h>
 #include <linux/interrupt.h>
 #include <linux/err.h>
+#include <linux/gpio/consumer.h>
 #include <linux/gpio.h>
 #include <linux/input.h>
 #include <linux/platform_device.h>
@@ -95,6 +96,8 @@ struct arizona_extcon_info {
 	int hpdet_ip_version;
 
 	struct extcon_dev *edev;
+
+	struct gpio_desc *micd_pol_gpio;
 };
 
 static const struct arizona_micd_config micd_default_modes[] = {
@@ -205,6 +208,10 @@ static void arizona_extcon_set_mode(struct arizona_extcon_info *info, int mode)
 	if (arizona->pdata.micd_pol_gpio > 0)
 		gpio_set_value_cansleep(arizona->pdata.micd_pol_gpio,
 					info->micd_modes[mode].gpio);
+	else
+		gpiod_set_value_cansleep(info->micd_pol_gpio,
+					 info->micd_modes[mode].gpio);
+
 	regmap_update_bits(arizona->regmap, ARIZONA_MIC_DETECT_1,
 			   ARIZONA_MICD_BIAS_SRC_MASK,
 			   info->micd_modes[mode].bias <<
@@ -1272,6 +1279,27 @@ static int arizona_extcon_probe(struct platform_device *pdev)
 				arizona->pdata.micd_pol_gpio, ret);
 			goto err_register;
 		}
+	} else {
+		if (gpio_initial_level)
+			mode = GPIOD_OUT_HIGH;
+		else
+			mode = GPIOD_OUT_LOW;
+
+		/* We can't use devm here because we need to do the get
+		 * against the MFD device, as that is where the of_node
+		 * will reside, but if we devm against that the GPIO
+		 * will not be freed if the extcon driver is unloaded.
+		 */
+		info->micd_pol_gpio = gpiod_get_optional(arizona->dev,
+							 "wlf,micd-pol",
+							 GPIOD_OUT_LOW);
+		if (IS_ERR(info->micd_pol_gpio)) {
+			ret = PTR_ERR(info->micd_pol_gpio);
+			dev_err(arizona->dev,
+				"Failed to get microphone polarity GPIO: %d\n",
+				ret);
+			goto err_register;
+		}
 	}
 
 	if (arizona->pdata.hpdet_id_gpio > 0) {
@@ -1282,7 +1310,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
 		if (ret != 0) {
 			dev_err(arizona->dev, "Failed to request GPIO%d: %d\n",
 				arizona->pdata.hpdet_id_gpio, ret);
-			goto err_register;
+			goto err_gpio;
 		}
 	}
 
@@ -1326,7 +1354,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
 				dev_err(arizona->dev,
 					"MICD ranges must be sorted\n");
 				ret = -EINVAL;
-				goto err_input;
+				goto err_gpio;
 			}
 		}
 	}
@@ -1345,7 +1373,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
 			dev_err(arizona->dev, "Unsupported MICD level %d\n",
 				info->micd_ranges[i].max);
 			ret = -EINVAL;
-			goto err_input;
+			goto err_gpio;
 		}
 
 		dev_dbg(arizona->dev, "%d ohms for MICD threshold %d\n",
@@ -1418,7 +1446,7 @@ static int arizona_extcon_probe(struct platform_device *pdev)
 	if (ret != 0) {
 		dev_err(&pdev->dev, "Failed to get JACKDET rise IRQ: %d\n",
 			ret);
-		goto err_input;
+		goto err_gpio;
 	}
 
 	ret = arizona_set_irq_wake(arizona, jack_irq_rise, 1);
@@ -1489,7 +1517,8 @@ err_rise_wake:
 	arizona_set_irq_wake(arizona, jack_irq_rise, 0);
 err_rise:
 	arizona_free_irq(arizona, jack_irq_rise, info);
-err_input:
+err_gpio:
+	gpiod_put(info->micd_pol_gpio);
 err_register:
 	pm_runtime_disable(&pdev->dev);
 	return ret;
@@ -1501,6 +1530,8 @@ static int arizona_extcon_remove(struct platform_device *pdev)
 	struct arizona *arizona = info->arizona;
 	int jack_irq_rise, jack_irq_fall;
 
+	gpiod_put(info->micd_pol_gpio);
+
 	pm_runtime_disable(&pdev->dev);
 
 	regmap_update_bits(arizona->regmap,
-- 
1.7.2.5

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[PATCH v3 6/7] mfd: arizona: Update DT doc for new mic detection bindings

[Charles Keepax]

Signed-off-by: Charles Keepax <ckeepax-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
---
 Documentation/devicetree/bindings/mfd/arizona.txt |   16 ++++++++++++++++
 1 files changed, 16 insertions(+), 0 deletions(-)

diff --git a/Documentation/devicetree/bindings/mfd/arizona.txt b/Documentation/devicetree/bindings/mfd/arizona.txt
index 32a71b7..8d92c92 100644
--- a/Documentation/devicetree/bindings/mfd/arizona.txt
+++ b/Documentation/devicetree/bindings/mfd/arizona.txt
@@ -68,6 +68,22 @@ Optional properties:
     If this node is not mentioned or if the value is unknown, then
     headphone detection mode is set to HPDETL.
 
+  - wlf,micd-detect-debounce : Additional software microphone detection
+    debounce specified in milliseconds.
+  - wlf,micd-pol-gpio : GPIO specifier for the GPIO controlling the headset
+    polarity if one exists.
+  - wlf,micd-bias-start-time : Time allowed for MICBIAS to startup prior to
+    performing microphone detection, specified as per the ARIZONA_MICD_TIME_XXX
+    defines.
+  - wlf,micd-rate : Delay between successive microphone detection measurements,
+    specified as per the ARIZONA_MICD_TIME_XXX defines.
+  - wlf,micd-dbtime : Microphone detection hardware debounces specified as the
+    number of measurements to take, valid values being 2 and 4.
+  - wlf,micd-timeout : Timeout for microphone detection, specified in
+    milliseconds.
+  - wlf,micd-force-micbias : Force MICBIAS continuously on during microphone
+    detection.
+
   - DCVDD-supply, MICVDD-supply : Power supplies, only need to be specified if
     they are being externally supplied. As covered in
     Documentation/devicetree/bindings/regulator/regulator.txt
-- 
1.7.2.5

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[PATCH v3 7/7] mfd: arizona: Update several pdata members to unsigned

[Charles Keepax]

Device tree and ACPI primarily deal with unsigned ints, many of the
pdata members in the Arizona driver are signed ints but are only ever
assigned positive values. Changing these pdata fields to unsigned ints
avoids us having to choose between overly verbose code and Sparse
warnings.

Signed-off-by: Charles Keepax <ckeepax-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>
---
 include/linux/mfd/arizona/pdata.h |   12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/include/linux/mfd/arizona/pdata.h b/include/linux/mfd/arizona/pdata.h
index af44081..f2c8381 100644
--- a/include/linux/mfd/arizona/pdata.h
+++ b/include/linux/mfd/arizona/pdata.h
@@ -104,7 +104,7 @@ struct arizona_pdata {
 	 * useful for systems where and I2S bus with multiple data
 	 * lines is mastered.
 	 */
-	int max_channels_clocked[ARIZONA_MAX_AIF];
+	unsigned int max_channels_clocked[ARIZONA_MAX_AIF];
 
 	/** GPIO5 is used for jack detection */
 	bool jd_gpio5;
@@ -128,22 +128,22 @@ struct arizona_pdata {
 	unsigned int hpdet_channel;
 
 	/** Extra debounce timeout used during initial mic detection (ms) */
-	int micd_detect_debounce;
+	unsigned int micd_detect_debounce;
 
 	/** GPIO for mic detection polarity */
 	int micd_pol_gpio;
 
 	/** Mic detect ramp rate */
-	int micd_bias_start_time;
+	unsigned int micd_bias_start_time;
 
 	/** Mic detect sample rate */
-	int micd_rate;
+	unsigned int micd_rate;
 
 	/** Mic detect debounce level */
-	int micd_dbtime;
+	unsigned int micd_dbtime;
 
 	/** Mic detect timeout (ms) */
-	int micd_timeout;
+	unsigned int micd_timeout;
 
 	/** Force MICBIAS on for mic detect */
 	bool micd_force_micbias;
-- 
1.7.2.5

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[PATCH v3 5/7] extcon: arizona: Ensure variables are set for headphone detection

[Charles Keepax]

The detecting flag really refers to the microphone detection stage and
as such should be cleared before arizona_identify_headphones is called.
Also the mic flag should be set before identify headphones is called as
well.

Otherwise the microphone detection will not be disabled during the
headphone detection and we can get false button reports caused by the
clamping that is part of the headphone detection.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
---
 drivers/extcon/extcon-arizona.c |   11 +++++++----
 1 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index eb8cf74..8a87ecd 100644
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -765,10 +765,11 @@ static void arizona_micd_timeout_work(struct work_struct *work)
 	mutex_lock(&info->lock);
 
 	dev_dbg(info->arizona->dev, "MICD timed out, reporting HP\n");
-	arizona_identify_headphone(info);
 
 	info->detecting = false;
 
+	arizona_identify_headphone(info);
+
 	arizona_stop_mic(info);
 
 	mutex_unlock(&info->lock);
@@ -834,6 +835,9 @@ static void arizona_micd_detect(struct work_struct *work)
 
 	/* If we got a high impedence we should have a headset, report it. */
 	if (info->detecting && (val & ARIZONA_MICD_LVL_8)) {
+		info->mic = true;
+		info->detecting = false;
+
 		arizona_identify_headphone(info);
 
 		ret = extcon_set_cable_state_(info->edev,
@@ -849,8 +853,6 @@ static void arizona_micd_detect(struct work_struct *work)
 				ret);
 		}
 
-		info->mic = true;
-		info->detecting = false;
 		goto handled;
 	}
 
@@ -863,10 +865,11 @@ static void arizona_micd_detect(struct work_struct *work)
 	if (info->detecting && (val & MICD_LVL_1_TO_7)) {
 		if (info->jack_flips >= info->micd_num_modes * 10) {
 			dev_dbg(arizona->dev, "Detected HP/line\n");
-			arizona_identify_headphone(info);
 
 			info->detecting = false;
 
+			arizona_identify_headphone(info);
+
 			arizona_stop_mic(info);
 		} else {
 			info->micd_mode++;
-- 
1.7.2.5

Re: [PATCH v3 6/7] mfd: arizona: Update DT doc for new mic detection bindings

[Lee Jones]

This requires a DT Ack.

[... which would be pretty difficult, as you didn't Cc them]

> Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
> ---
>  Documentation/devicetree/bindings/mfd/arizona.txt |   16 ++++++++++++++++
>  1 files changed, 16 insertions(+), 0 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/mfd/arizona.txt b/Documentation/devicetree/bindings/mfd/arizona.txt
> index 32a71b7..8d92c92 100644
> --- a/Documentation/devicetree/bindings/mfd/arizona.txt
> +++ b/Documentation/devicetree/bindings/mfd/arizona.txt
> @@ -68,6 +68,22 @@ Optional properties:
>      If this node is not mentioned or if the value is unknown, then
>      headphone detection mode is set to HPDETL.
>  
> +  - wlf,micd-detect-debounce : Additional software microphone detection
> +    debounce specified in milliseconds.
> +  - wlf,micd-pol-gpio : GPIO specifier for the GPIO controlling the headset
> +    polarity if one exists.
> +  - wlf,micd-bias-start-time : Time allowed for MICBIAS to startup prior to
> +    performing microphone detection, specified as per the ARIZONA_MICD_TIME_XXX
> +    defines.
> +  - wlf,micd-rate : Delay between successive microphone detection measurements,
> +    specified as per the ARIZONA_MICD_TIME_XXX defines.
> +  - wlf,micd-dbtime : Microphone detection hardware debounces specified as the
> +    number of measurements to take, valid values being 2 and 4.
> +  - wlf,micd-timeout : Timeout for microphone detection, specified in
> +    milliseconds.
> +  - wlf,micd-force-micbias : Force MICBIAS continuously on during microphone
> +    detection.
> +
>    - DCVDD-supply, MICVDD-supply : Power supplies, only need to be specified if
>      they are being externally supplied. As covered in
>      Documentation/devicetree/bindings/regulator/regulator.txt

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [PATCH v3 6/7] mfd: arizona: Update DT doc for new mic detection bindings

[Charles Keepax]

On Wed, Jun 24, 2015 at 03:15:34PM +0100, Lee Jones wrote:
> This requires a DT Ack.
> 
> [... which would be pretty difficult, as you didn't Cc them]
> 

I was under the impression that for fairly non-controversial
bindings (which I really feel these are) that CCing the DT
mailing list was considered sufficient. But I am more than happy
to resend with more people on the CC if you prefer.

Thanks,
Charles

Re: [PATCH v3 6/7] mfd: arizona: Update DT doc for new mic detection bindings

[Lee Jones]

On Wed, 24 Jun 2015, Charles Keepax wrote:

> On Wed, Jun 24, 2015 at 03:15:34PM +0100, Lee Jones wrote:
> > This requires a DT Ack.
> > 
> > [... which would be pretty difficult, as you didn't Cc them]
> > 
> 
> I was under the impression that for fairly non-controversial
> bindings (which I really feel these are) that CCing the DT
> mailing list was considered sufficient. But I am more than happy
> to resend with more people on the CC if you prefer.

I never Cc the Maintainers personally, as there are a lot of them.
AFAIU Cc'ing the list is fine.

However ... you didn't do that either.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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