[PATCH v2 0/5] mfd: Fix platform device ids to avoid probe failure

[PATCH v2 0/5] mfd: Fix platform device ids to avoid probe failure

[Bartlomiej Zolnierkiewicz]

Hi,

Commit 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
changed the way platform device ids are generated from mfd id base and
cell ids in mfd_add_device().  Unfortunately the change in question
breaks mfd drivers which are using mfd_add_devices() with mfd id base
equal to -1 and non-zero cell ids (used to distinguish cells with
the same name field).  The result is that mfd core tries to register
platform devices with the same name which obviously fails and leads
to mfd device probe failure.

Relevant error messages (in this case for MAX8997 PMIC driver):

[    0.911674] ------------[ cut here ]------------
[    0.911706] WARNING: CPU: 0 PID: 1 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x54/0x70()
[    0.911718] sysfs: cannot create duplicate filename '/devices/13860000.i2c/i2c-0/0-0066/max8997-led'
...
[    0.912382] ------------[ cut here ]------------
[    0.912402] WARNING: CPU: 0 PID: 1 at lib/kobject.c:240 kobject_add_internal+0x238/0x2c0()
[    0.912411] kobject_add_internal failed for max8997-led with -EEXIST, don't try to register things with the same name in th
...
[    0.920721] max8997 0-0066: failed to add MFD devices -17
[    0.921553] max8997: probe of 0-0066 failed with error -17

Changing mfd_add_devices() mfd id base from -1 to 0 and at the same
time setting proper cell ids for all cells fixes the issue.

MAX8997 PMIC fix was tested on Exynos4210 Origen board, the rest of
patches is compile tested only.

Changes since v1:
- corrected 'stable' mailing list address, no other changes

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics


Bartlomiej Zolnierkiewicz (5):
  mfd: max8997: Fix platform device ids to avoid probe failure
  mfd: da9055: Fix platform device ids to avoid probe failure
  mfd: lp8788: Fix platform device ids to avoid probe failure
  mfd: wm831x: Fix platform device ids to avoid probe failure
  mfd: da9052: Fix platform device names

 drivers/mfd/da9052-core.c |  21 ++++--
 drivers/mfd/da9055-core.c |  21 ++++--
 drivers/mfd/lp8788.c      |  10 ++-
 drivers/mfd/max8997.c     |  16 ++--
 drivers/mfd/wm831x-core.c | 184 +++++++++++++++++++++++++++-------------------
 5 files changed, 150 insertions(+), 102 deletions(-)

-- 
1.8.2.3

[PATCH v2 1/5] mfd: max8997: Fix platform device ids to avoid probe failure

[Bartlomiej Zolnierkiewicz]

Commit 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
changed the way platform device ids are generated from mfd id base and
cell ids in mfd_add_device().  Unfortunately the change in question
breaks mfd drivers which are using mfd_add_devices() with mfd id base
equal to -1 and non-zero cell ids (used to distinguish cells with
the same name field).  The result is that mfd core tries to register
platform devices with the same name which obviously fails and leads
to mfd device probe failure.

Relevant error messages in case of MAX8997 PMIC driver:

[    0.911674] ------------[ cut here ]------------
[    0.911706] WARNING: CPU: 0 PID: 1 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x54/0x70()
[    0.911718] sysfs: cannot create duplicate filename '/devices/13860000.i2c/i2c-0/0-0066/max8997-led'
[    0.911725] Modules linked in:
[    0.911742] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.18.0-rc1-00027-g6e3f62f #1557
[    0.911782] [<c0013cb4>] (unwind_backtrace) from [<c0010d10>] (show_stack+0x10/0x14)
[    0.911809] [<c0010d10>] (show_stack) from [<c04619c8>] (dump_stack+0x68/0xb8)
[    0.911837] [<c04619c8>] (dump_stack) from [<c0020c80>] (warn_slowpath_common+0x64/0x84)
[    0.911854] [<c0020c80>] (warn_slowpath_common) from [<c0020d34>] (warn_slowpath_fmt+0x30/0x40)
[    0.911871] [<c0020d34>] (warn_slowpath_fmt) from [<c011ec50>] (sysfs_warn_dup+0x54/0x70)
[    0.911887] [<c011ec50>] (sysfs_warn_dup) from [<c011ecf4>] (sysfs_create_dir_ns+0x88/0x90)
[    0.911910] [<c011ecf4>] (sysfs_create_dir_ns) from [<c01d5524>] (kobject_add_internal+0x9c/0x2c0)
[    0.911926] [<c01d5524>] (kobject_add_internal) from [<c01d58d0>] (kobject_add+0x4c/0x94)
[    0.911950] [<c01d58d0>] (kobject_add) from [<c026f65c>] (device_add+0xb8/0x4d8)
[    0.911969] [<c026f65c>] (device_add) from [<c027330c>] (platform_device_add+0x114/0x214)
[    0.911996] [<c027330c>] (platform_device_add) from [<c028d0f0>] (mfd_add_device+0x240/0x328)
[    0.912013] [<c028d0f0>] (mfd_add_device) from [<c028d3d0>] (mfd_add_devices+0xa4/0xe8)
[    0.912030] [<c028d3d0>] (mfd_add_devices) from [<c028e3b0>] (max8997_i2c_probe+0x150/0x230)
[    0.912056] [<c028e3b0>] (max8997_i2c_probe) from [<c0329114>] (i2c_device_probe+0xe8/0x120)
[    0.912076] [<c0329114>] (i2c_device_probe) from [<c0271cf0>] (driver_probe_device+0x114/0x234)
[    0.912094] [<c0271cf0>] (driver_probe_device) from [<c0270630>] (bus_for_each_drv+0x5c/0x88)
[    0.912109] [<c0270630>] (bus_for_each_drv) from [<c0271ba8>] (device_attach+0x70/0x88)
[    0.912124] [<c0271ba8>] (device_attach) from [<c0271304>] (bus_probe_device+0x84/0xa8)
[    0.912138] [<c0271304>] (bus_probe_device) from [<c026f94c>] (device_add+0x3a8/0x4d8)
[    0.912153] [<c026f94c>] (device_add) from [<c03298c0>] (i2c_new_device+0xfc/0x16c)
[    0.912167] [<c03298c0>] (i2c_new_device) from [<c0329dd0>] (i2c_register_adapter+0x27c/0x490)
[    0.912186] [<c0329dd0>] (i2c_register_adapter) from [<c032f184>] (s3c24xx_i2c_probe+0x200/0x4dc)
[    0.912205] [<c032f184>] (s3c24xx_i2c_probe) from [<c027310c>] (platform_drv_probe+0x48/0x98)
[    0.912219] [<c027310c>] (platform_drv_probe) from [<c0271cf0>] (driver_probe_device+0x114/0x234)
[    0.912232] [<c0271cf0>] (driver_probe_device) from [<c0271e9c>] (__driver_attach+0x8c/0x90)
[    0.912246] [<c0271e9c>] (__driver_attach) from [<c02706b0>] (bus_for_each_dev+0x54/0x88)
[    0.912262] [<c02706b0>] (bus_for_each_dev) from [<c02714f4>] (bus_add_driver+0xd8/0x1cc)
[    0.912275] [<c02714f4>] (bus_add_driver) from [<c02724bc>] (driver_register+0x78/0xf4)
[    0.912291] [<c02724bc>] (driver_register) from [<c0008924>] (do_one_initcall+0x80/0x1c4)
[    0.912312] [<c0008924>] (do_one_initcall) from [<c062cd20>] (kernel_init_freeable+0x100/0x1cc)
[    0.912330] [<c062cd20>] (kernel_init_freeable) from [<c045da50>] (kernel_init+0x8/0xe4)
[    0.912348] [<c045da50>] (kernel_init) from [<c000e5b8>] (ret_from_fork+0x14/0x3c)
[    0.912370] ---[ end trace ca08768d4d1efd62 ]---
[    0.912382] ------------[ cut here ]------------
[    0.912402] WARNING: CPU: 0 PID: 1 at lib/kobject.c:240 kobject_add_internal+0x238/0x2c0()
[    0.912411] kobject_add_internal failed for max8997-led with -EEXIST, don't try to register things with the same name in th
e same directory.
[    0.912418] Modules linked in:
[    0.912433] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G        W      3.18.0-rc1-00027-g6e3f62f #1557
[    0.912458] [<c0013cb4>] (unwind_backtrace) from [<c0010d10>] (show_stack+0x10/0x14)
[    0.912479] [<c0010d10>] (show_stack) from [<c04619c8>] (dump_stack+0x68/0xb8)
[    0.912502] [<c04619c8>] (dump_stack) from [<c0020c80>] (warn_slowpath_common+0x64/0x84)
[    0.912519] [<c0020c80>] (warn_slowpath_common) from [<c0020d34>] (warn_slowpath_fmt+0x30/0x40)
[    0.912536] [<c0020d34>] (warn_slowpath_fmt) from [<c01d56c0>] (kobject_add_internal+0x238/0x2c0)
[    0.912553] [<c01d56c0>] (kobject_add_internal) from [<c01d58d0>] (kobject_add+0x4c/0x94)
[    0.912572] [<c01d58d0>] (kobject_add) from [<c026f65c>] (device_add+0xb8/0x4d8)
[    0.912588] [<c026f65c>] (device_add) from [<c027330c>] (platform_device_add+0x114/0x214)
[    0.912611] [<c027330c>] (platform_device_add) from [<c028d0f0>] (mfd_add_device+0x240/0x328)
[    0.912628] [<c028d0f0>] (mfd_add_device) from [<c028d3d0>] (mfd_add_devices+0xa4/0xe8)
[    0.912643] [<c028d3d0>] (mfd_add_devices) from [<c028e3b0>] (max8997_i2c_probe+0x150/0x230)
[    0.912665] [<c028e3b0>] (max8997_i2c_probe) from [<c0329114>] (i2c_device_probe+0xe8/0x120)
[    0.912682] [<c0329114>] (i2c_device_probe) from [<c0271cf0>] (driver_probe_device+0x114/0x234)
[    0.912700] [<c0271cf0>] (driver_probe_device) from [<c0270630>] (bus_for_each_drv+0x5c/0x88)
[    0.912714] [<c0270630>] (bus_for_each_drv) from [<c0271ba8>] (device_attach+0x70/0x88)
[    0.912729] [<c0271ba8>] (device_attach) from [<c0271304>] (bus_probe_device+0x84/0xa8)
[    0.912743] [<c0271304>] (bus_probe_device) from [<c026f94c>] (device_add+0x3a8/0x4d8)
[    0.912758] [<c026f94c>] (device_add) from [<c03298c0>] (i2c_new_device+0xfc/0x16c)
[    0.912771] [<c03298c0>] (i2c_new_device) from [<c0329dd0>] (i2c_register_adapter+0x27c/0x490)
[    0.912789] [<c0329dd0>] (i2c_register_adapter) from [<c032f184>] (s3c24xx_i2c_probe+0x200/0x4dc)
[    0.912805] [<c032f184>] (s3c24xx_i2c_probe) from [<c027310c>] (platform_drv_probe+0x48/0x98)
[    0.912820] [<c027310c>] (platform_drv_probe) from [<c0271cf0>] (driver_probe_device+0x114/0x234)
[    0.912833] [<c0271cf0>] (driver_probe_device) from [<c0271e9c>] (__driver_attach+0x8c/0x90)
[    0.912847] [<c0271e9c>] (__driver_attach) from [<c02706b0>] (bus_for_each_dev+0x54/0x88)
[    0.912862] [<c02706b0>] (bus_for_each_dev) from [<c02714f4>] (bus_add_driver+0xd8/0x1cc)
[    0.912875] [<c02714f4>] (bus_add_driver) from [<c02724bc>] (driver_register+0x78/0xf4)
[    0.912889] [<c02724bc>] (driver_register) from [<c0008924>] (do_one_initcall+0x80/0x1c4)
[    0.912908] [<c0008924>] (do_one_initcall) from [<c062cd20>] (kernel_init_freeable+0x100/0x1cc)
[    0.912925] [<c062cd20>] (kernel_init_freeable) from [<c045da50>] (kernel_init+0x8/0xe4)
[    0.912942] [<c045da50>] (kernel_init) from [<c000e5b8>] (ret_from_fork+0x14/0x3c)
[    0.912952] ---[ end trace ca08768d4d1efd63 ]---
[    0.920721] max8997 0-0066: failed to add MFD devices -17
[    0.921553] max8997: probe of 0-0066 failed with error -17

Changing mfd_add_devices() mfd id base from -1 to 0 and at the same
time setting proper cell ids for all cells fixes the issue.

This fix was tested on Exynos4210 Origen board which is using MAX8997
PMIC (it also fixes Exynos cpufreq support which was broken because
vdd_arm regulator was not available due to MAX8997 PMIC probe failure).

Fixes: 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
Cc: Johan Hovold <johan@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
---
stable v3.19+

 drivers/mfd/max8997.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/mfd/max8997.c b/drivers/mfd/max8997.c
index 595364e..c93dabc 100644
--- a/drivers/mfd/max8997.c
+++ b/drivers/mfd/max8997.c
@@ -41,13 +41,13 @@
 #define I2C_ADDR_HAPTIC	(0x90 >> 1)
 
 static const struct mfd_cell max8997_devs[] = {
-	{ .name = "max8997-pmic", },
-	{ .name = "max8997-rtc", },
-	{ .name = "max8997-battery", },
-	{ .name = "max8997-haptic", },
-	{ .name = "max8997-muic", },
-	{ .name = "max8997-led", .id = 1 },
-	{ .name = "max8997-led", .id = 2 },
+	{ .name = "max8997-pmic",	.id = -1 },
+	{ .name = "max8997-rtc",	.id = -1 },
+	{ .name = "max8997-battery",	.id = -1 },
+	{ .name = "max8997-haptic",	.id = -1 },
+	{ .name = "max8997-muic",	.id = -1 },
+	{ .name = "max8997-led",	.id = 0 },
+	{ .name = "max8997-led",	.id = 1 },
 };
 
 #ifdef CONFIG_OF
@@ -234,7 +234,7 @@ static int max8997_i2c_probe(struct i2c_client *i2c,
 
 	max8997_irq_init(max8997);
 
-	ret = mfd_add_devices(max8997->dev, -1, max8997_devs,
+	ret = mfd_add_devices(max8997->dev, 0, max8997_devs,
 			ARRAY_SIZE(max8997_devs),
 			NULL, 0, NULL);
 	if (ret < 0) {
-- 
1.8.2.3

[PATCH v2 2/5] mfd: da9055: Fix platform device ids to avoid probe failure

[Bartlomiej Zolnierkiewicz]

Commit 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
changed the way platform device ids are generated from mfd id base and
cell ids in mfd_add_device().  Unfortunately the change in question
breaks mfd drivers which are using mfd_add_devices() with mfd id base
equal to -1 and non-zero cell ids (used to distinguish cells with
the same name field).  The result is that mfd core tries to register
platform devices with the same name which obviously fails and leads
to mfd device probe failure.

Changing mfd_add_devices() mfd id base from -1 to 0 and at the same
time setting proper cell ids for all cells fixes the issue.

Fixes: 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
Cc: Johan Hovold <johan@kernel.org>
Cc: Support Opensource <support.opensource@diasemi.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
---
stable v3.19+

 drivers/mfd/da9055-core.c | 21 +++++++++++++--------
 1 file changed, 13 insertions(+), 8 deletions(-)

diff --git a/drivers/mfd/da9055-core.c b/drivers/mfd/da9055-core.c
index b4d920c..4dbe752 100644
--- a/drivers/mfd/da9055-core.c
+++ b/drivers/mfd/da9055-core.c
@@ -298,6 +298,12 @@ static const struct mfd_cell da9055_devs[] = {
 	{
 		.of_compatible = "dlg,da9055-gpio",
 		.name = "da9055-gpio",
+		.id = -1,
+	},
+	{
+		.of_compatible = "dlg,da9055-regulator",
+		.name = "da9055-regulator",
+		.id = 0,
 	},
 	{
 		.of_compatible = "dlg,da9055-regulator",
@@ -327,43 +333,42 @@ static const struct mfd_cell da9055_devs[] = {
 	{
 		.of_compatible = "dlg,da9055-regulator",
 		.name = "da9055-regulator",
-		.id = 6,
-	},
-	{
-		.of_compatible = "dlg,da9055-regulator",
-		.name = "da9055-regulator",
-		.id = 7,
 		.resources = &da9055_ld05_6_resource,
 		.num_resources = 1,
+		.id = 6,
 	},
 	{
 		.of_compatible = "dlg,da9055-regulator",
 		.name = "da9055-regulator",
 		.resources = &da9055_ld05_6_resource,
 		.num_resources = 1,
-		.id = 8,
+		.id = 7,
 	},
 	{
 		.of_compatible = "dlg,da9055-onkey",
 		.name = "da9055-onkey",
 		.resources = &da9055_onkey_resource,
 		.num_resources = 1,
+		.id = -1,
 	},
 	{
 		.of_compatible = "dlg,da9055-rtc",
 		.name = "da9055-rtc",
 		.resources = da9055_rtc_resource,
 		.num_resources = ARRAY_SIZE(da9055_rtc_resource),
+		.id = -1,
 	},
 	{
 		.of_compatible = "dlg,da9055-hwmon",
 		.name = "da9055-hwmon",
 		.resources = &da9055_hwmon_resource,
 		.num_resources = 1,
+		.id = -1,
 	},
 	{
 		.of_compatible = "dlg,da9055-watchdog",
 		.name = "da9055-watchdog",
+		.id = -1,
 	},
 };
 
@@ -404,7 +409,7 @@ int da9055_device_init(struct da9055 *da9055)
 
 	da9055->irq_base = regmap_irq_chip_get_base(da9055->irq_data);
 
-	ret = mfd_add_devices(da9055->dev, -1,
+	ret = mfd_add_devices(da9055->dev, 0,
 			      da9055_devs, ARRAY_SIZE(da9055_devs),
 			      NULL, da9055->irq_base, NULL);
 	if (ret)
-- 
1.8.2.3

[PATCH v2 3/5] mfd: lp8788: Fix platform device ids to avoid probe failure

[Bartlomiej Zolnierkiewicz]

Commit 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
changed the way platform device ids are generated from mfd id base and
cell ids in mfd_add_device().  Unfortunately the change in question
breaks mfd drivers which are using mfd_add_devices() with mfd id base
equal to -1 and non-zero cell ids (used to distinguish cells with
the same name field).  The result is that mfd core tries to register
platform devices with the same name which obviously fails and leads
to mfd device probe failure.

Changing mfd_add_devices() mfd id base from -1 to 0 and at the same
time setting proper cell ids for all cells fixes the issue.

Fixes: 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
Cc: Johan Hovold <johan@kernel.org>
Cc: Milo Kim <milo.kim@ti.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
---
stable v3.19+

 drivers/mfd/lp8788.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/mfd/lp8788.c b/drivers/mfd/lp8788.c
index a30bc15..2883b97 100644
--- a/drivers/mfd/lp8788.c
+++ b/drivers/mfd/lp8788.c
@@ -23,6 +23,7 @@
 #define MFD_DEV_SIMPLE(_name)					\
 {								\
 	.name = LP8788_DEV_##_name,				\
+	.id = -1,						\
 }
 
 #define MFD_DEV_WITH_ID(_name, _id)				\
@@ -36,6 +37,7 @@
 	.name = LP8788_DEV_##_name,				\
 	.resources = _resource,					\
 	.num_resources = num_resource,				\
+	.id = -1,						\
 }
 
 static struct resource chg_irqs[] = {
@@ -73,12 +75,13 @@ static struct resource rtc_irqs[] = {
 
 static const struct mfd_cell lp8788_devs[] = {
 	/* 4 bucks */
+	MFD_DEV_WITH_ID(BUCK, 0),
 	MFD_DEV_WITH_ID(BUCK, 1),
 	MFD_DEV_WITH_ID(BUCK, 2),
 	MFD_DEV_WITH_ID(BUCK, 3),
-	MFD_DEV_WITH_ID(BUCK, 4),
 
 	/* 12 digital ldos */
+	MFD_DEV_WITH_ID(DLDO, 0),
 	MFD_DEV_WITH_ID(DLDO, 1),
 	MFD_DEV_WITH_ID(DLDO, 2),
 	MFD_DEV_WITH_ID(DLDO, 3),
@@ -90,9 +93,9 @@ static const struct mfd_cell lp8788_devs[] = {
 	MFD_DEV_WITH_ID(DLDO, 9),
 	MFD_DEV_WITH_ID(DLDO, 10),
 	MFD_DEV_WITH_ID(DLDO, 11),
-	MFD_DEV_WITH_ID(DLDO, 12),
 
 	/* 10 analog ldos */
+	MFD_DEV_WITH_ID(ALDO, 0),
 	MFD_DEV_WITH_ID(ALDO, 1),
 	MFD_DEV_WITH_ID(ALDO, 2),
 	MFD_DEV_WITH_ID(ALDO, 3),
@@ -102,7 +105,6 @@ static const struct mfd_cell lp8788_devs[] = {
 	MFD_DEV_WITH_ID(ALDO, 7),
 	MFD_DEV_WITH_ID(ALDO, 8),
 	MFD_DEV_WITH_ID(ALDO, 9),
-	MFD_DEV_WITH_ID(ALDO, 10),
 
 	/* ADC */
 	MFD_DEV_SIMPLE(ADC),
@@ -199,7 +201,7 @@ static int lp8788_probe(struct i2c_client *cl, const struct i2c_device_id *id)
 	if (ret)
 		return ret;
 
-	return mfd_add_devices(lp->dev, -1, lp8788_devs,
+	return mfd_add_devices(lp->dev, 0, lp8788_devs,
 			       ARRAY_SIZE(lp8788_devs), NULL, 0, NULL);
 }
 
-- 
1.8.2.3

[PATCH v2 4/5] mfd: wm831x: Fix platform device ids to avoid probe failure

[Bartlomiej Zolnierkiewicz]

Commit 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
changed the way platform device ids are generated from mfd id base and
cell ids in mfd_add_device().  Unfortunately the change in question
breaks mfd drivers which are using mfd_add_devices() with mfd id base
equal to -1 and non-zero cell ids (used to distinguish cells with
the same name field).  The result is that mfd core tries to register
platform devices with the same name which obviously fails and leads
to mfd device probe failure.

Changing mfd_add_devices() mfd id base from -1 to 0 and at the same
time setting proper cell ids for all cells fixes the issue.

Fixes: 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
Cc: Johan Hovold <johan@kernel.org>
Cc: patches@opensource.wolfsonmicro.com
Cc: <stable@vger.kernel.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
---
stable v3.19+

 drivers/mfd/wm831x-core.c | 184 +++++++++++++++++++++++++++-------------------
 1 file changed, 107 insertions(+), 77 deletions(-)

diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index 28366a9..68a7543 100644
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -1014,152 +1014,159 @@ static struct resource wm831x_wdt_resources[] = {
 static const struct mfd_cell wm8310_devs[] = {
 	{
 		.name = "wm831x-backup",
+		.id = -1,
 	},
 	{
 		.name = "wm831x-buckv",
-		.id = 1,
+		.id = 0,
 		.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
 		.resources = wm831x_dcdc1_resources,
 	},
 	{
 		.name = "wm831x-buckv",
-		.id = 2,
+		.id = 1,
 		.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
 		.resources = wm831x_dcdc2_resources,
 	},
 	{
 		.name = "wm831x-buckp",
-		.id = 3,
+		.id = 2,
 		.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
 		.resources = wm831x_dcdc3_resources,
 	},
 	{
 		.name = "wm831x-boostp",
-		.id = 4,
+		.id = 3,
 		.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
 		.resources = wm831x_dcdc4_resources,
 	},
 	{
 		.name = "wm831x-clk",
+		.id = -1,
 	},
 	{
 		.name = "wm831x-epe",
-		.id = 1,
+		.id = 0,
 	},
 	{
 		.name = "wm831x-epe",
-		.id = 2,
+		.id = 1,
 	},
 	{
 		.name = "wm831x-gpio",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
 		.resources = wm831x_gpio_resources,
 	},
 	{
 		.name = "wm831x-hwmon",
+		.id = -1,
 	},
 	{
 		.name = "wm831x-isink",
-		.id = 1,
+		.id = 0,
 		.num_resources = ARRAY_SIZE(wm831x_isink1_resources),
 		.resources = wm831x_isink1_resources,
 	},
 	{
 		.name = "wm831x-isink",
-		.id = 2,
+		.id = 1,
 		.num_resources = ARRAY_SIZE(wm831x_isink2_resources),
 		.resources = wm831x_isink2_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 1,
+		.id = 0,
 		.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
 		.resources = wm831x_ldo1_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 2,
+		.id = 1,
 		.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
 		.resources = wm831x_ldo2_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 3,
+		.id = 2,
 		.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
 		.resources = wm831x_ldo3_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 4,
+		.id = 3,
 		.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
 		.resources = wm831x_ldo4_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 5,
+		.id = 4,
 		.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
 		.resources = wm831x_ldo5_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 6,
+		.id = 5,
 		.num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
 		.resources = wm831x_ldo6_resources,
 	},
 	{
 		.name = "wm831x-aldo",
-		.id = 7,
+		.id = 6,
 		.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
 		.resources = wm831x_ldo7_resources,
 	},
 	{
 		.name = "wm831x-aldo",
-		.id = 8,
+		.id = 7,
 		.num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
 		.resources = wm831x_ldo8_resources,
 	},
 	{
 		.name = "wm831x-aldo",
-		.id = 9,
+		.id = 8,
 		.num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
 		.resources = wm831x_ldo9_resources,
 	},
 	{
 		.name = "wm831x-aldo",
-		.id = 10,
+		.id = 9,
 		.num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
 		.resources = wm831x_ldo10_resources,
 	},
 	{
 		.name = "wm831x-alive-ldo",
-		.id = 11,
+		.id = 10,
 		.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
 		.resources = wm831x_ldo11_resources,
 	},
 	{
 		.name = "wm831x-on",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_on_resources),
 		.resources = wm831x_on_resources,
 	},
 	{
 		.name = "wm831x-power",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_power_resources),
 		.resources = wm831x_power_resources,
 	},
 	{
 		.name = "wm831x-status",
-		.id = 1,
+		.id = 0,
 		.num_resources = ARRAY_SIZE(wm831x_status1_resources),
 		.resources = wm831x_status1_resources,
 	},
 	{
 		.name = "wm831x-status",
-		.id = 2,
+		.id = 1,
 		.num_resources = ARRAY_SIZE(wm831x_status2_resources),
 		.resources = wm831x_status2_resources,
 	},
 	{
 		.name = "wm831x-watchdog",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
 		.resources = wm831x_wdt_resources,
 	},
@@ -1168,128 +1175,135 @@ static const struct mfd_cell wm8310_devs[] = {
 static const struct mfd_cell wm8311_devs[] = {
 	{
 		.name = "wm831x-backup",
+		.id = -1,
 	},
 	{
 		.name = "wm831x-buckv",
-		.id = 1,
+		.id = 0,
 		.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
 		.resources = wm831x_dcdc1_resources,
 	},
 	{
 		.name = "wm831x-buckv",
-		.id = 2,
+		.id = 1,
 		.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
 		.resources = wm831x_dcdc2_resources,
 	},
 	{
 		.name = "wm831x-buckp",
-		.id = 3,
+		.id = 2,
 		.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
 		.resources = wm831x_dcdc3_resources,
 	},
 	{
 		.name = "wm831x-boostp",
-		.id = 4,
+		.id = 3,
 		.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
 		.resources = wm831x_dcdc4_resources,
 	},
 	{
 		.name = "wm831x-clk",
+		.id = -1,
 	},
 	{
 		.name = "wm831x-epe",
-		.id = 1,
+		.id = 0,
 	},
 	{
 		.name = "wm831x-epe",
-		.id = 2,
+		.id = 1,
 	},
 	{
 		.name = "wm831x-gpio",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
 		.resources = wm831x_gpio_resources,
 	},
 	{
 		.name = "wm831x-hwmon",
+		.id = -1,
 	},
 	{
 		.name = "wm831x-isink",
-		.id = 1,
+		.id = 0,
 		.num_resources = ARRAY_SIZE(wm831x_isink1_resources),
 		.resources = wm831x_isink1_resources,
 	},
 	{
 		.name = "wm831x-isink",
-		.id = 2,
+		.id = 1,
 		.num_resources = ARRAY_SIZE(wm831x_isink2_resources),
 		.resources = wm831x_isink2_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 1,
+		.id = 0,
 		.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
 		.resources = wm831x_ldo1_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 2,
+		.id = 1,
 		.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
 		.resources = wm831x_ldo2_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 3,
+		.id = 2,
 		.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
 		.resources = wm831x_ldo3_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 4,
+		.id = 3,
 		.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
 		.resources = wm831x_ldo4_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 5,
+		.id = 4,
 		.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
 		.resources = wm831x_ldo5_resources,
 	},
 	{
 		.name = "wm831x-aldo",
-		.id = 7,
+		.id = 6,
 		.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
 		.resources = wm831x_ldo7_resources,
 	},
 	{
 		.name = "wm831x-alive-ldo",
-		.id = 11,
+		.id = 10,
 		.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
 		.resources = wm831x_ldo11_resources,
 	},
 	{
 		.name = "wm831x-on",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_on_resources),
 		.resources = wm831x_on_resources,
 	},
 	{
 		.name = "wm831x-power",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_power_resources),
 		.resources = wm831x_power_resources,
 	},
 	{
 		.name = "wm831x-status",
-		.id = 1,
+		.id = 0,
 		.num_resources = ARRAY_SIZE(wm831x_status1_resources),
 		.resources = wm831x_status1_resources,
 	},
 	{
 		.name = "wm831x-status",
-		.id = 2,
+		.id = 1,
 		.num_resources = ARRAY_SIZE(wm831x_status2_resources),
 		.resources = wm831x_status2_resources,
 	},
 	{
 		.name = "wm831x-watchdog",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
 		.resources = wm831x_wdt_resources,
 	},
@@ -1298,152 +1312,159 @@ static const struct mfd_cell wm8311_devs[] = {
 static const struct mfd_cell wm8312_devs[] = {
 	{
 		.name = "wm831x-backup",
+		.id = -1,
 	},
 	{
 		.name = "wm831x-buckv",
-		.id = 1,
+		.id = 0,
 		.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
 		.resources = wm831x_dcdc1_resources,
 	},
 	{
 		.name = "wm831x-buckv",
-		.id = 2,
+		.id = 1,
 		.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
 		.resources = wm831x_dcdc2_resources,
 	},
 	{
 		.name = "wm831x-buckp",
-		.id = 3,
+		.id = 2,
 		.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
 		.resources = wm831x_dcdc3_resources,
 	},
 	{
 		.name = "wm831x-boostp",
-		.id = 4,
+		.id = 3,
 		.num_resources = ARRAY_SIZE(wm831x_dcdc4_resources),
 		.resources = wm831x_dcdc4_resources,
 	},
 	{
 		.name = "wm831x-clk",
+		.id = -1,
 	},
 	{
 		.name = "wm831x-epe",
-		.id = 1,
+		.id = 0,
 	},
 	{
 		.name = "wm831x-epe",
-		.id = 2,
+		.id = 1,
 	},
 	{
 		.name = "wm831x-gpio",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
 		.resources = wm831x_gpio_resources,
 	},
 	{
 		.name = "wm831x-hwmon",
+		.id = -1,
 	},
 	{
 		.name = "wm831x-isink",
-		.id = 1,
+		.id = 0,
 		.num_resources = ARRAY_SIZE(wm831x_isink1_resources),
 		.resources = wm831x_isink1_resources,
 	},
 	{
 		.name = "wm831x-isink",
-		.id = 2,
+		.id = 1,
 		.num_resources = ARRAY_SIZE(wm831x_isink2_resources),
 		.resources = wm831x_isink2_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 1,
+		.id = 0,
 		.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
 		.resources = wm831x_ldo1_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 2,
+		.id = 1,
 		.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
 		.resources = wm831x_ldo2_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 3,
+		.id = 2,
 		.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
 		.resources = wm831x_ldo3_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 4,
+		.id = 3,
 		.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
 		.resources = wm831x_ldo4_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 5,
+		.id = 4,
 		.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
 		.resources = wm831x_ldo5_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 6,
+		.id = 5,
 		.num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
 		.resources = wm831x_ldo6_resources,
 	},
 	{
 		.name = "wm831x-aldo",
-		.id = 7,
+		.id = 6,
 		.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
 		.resources = wm831x_ldo7_resources,
 	},
 	{
 		.name = "wm831x-aldo",
-		.id = 8,
+		.id = 7,
 		.num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
 		.resources = wm831x_ldo8_resources,
 	},
 	{
 		.name = "wm831x-aldo",
-		.id = 9,
+		.id = 8,
 		.num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
 		.resources = wm831x_ldo9_resources,
 	},
 	{
 		.name = "wm831x-aldo",
-		.id = 10,
+		.id = 9,
 		.num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
 		.resources = wm831x_ldo10_resources,
 	},
 	{
 		.name = "wm831x-alive-ldo",
-		.id = 11,
+		.id = 10,
 		.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
 		.resources = wm831x_ldo11_resources,
 	},
 	{
 		.name = "wm831x-on",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_on_resources),
 		.resources = wm831x_on_resources,
 	},
 	{
 		.name = "wm831x-power",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_power_resources),
 		.resources = wm831x_power_resources,
 	},
 	{
 		.name = "wm831x-status",
-		.id = 1,
+		.id = 0,
 		.num_resources = ARRAY_SIZE(wm831x_status1_resources),
 		.resources = wm831x_status1_resources,
 	},
 	{
 		.name = "wm831x-status",
-		.id = 2,
+		.id = 1,
 		.num_resources = ARRAY_SIZE(wm831x_status2_resources),
 		.resources = wm831x_status2_resources,
 	},
 	{
 		.name = "wm831x-watchdog",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
 		.resources = wm831x_wdt_resources,
 	},
@@ -1452,127 +1473,133 @@ static const struct mfd_cell wm8312_devs[] = {
 static const struct mfd_cell wm8320_devs[] = {
 	{
 		.name = "wm831x-backup",
+		.id = -1,
 	},
 	{
 		.name = "wm831x-buckv",
-		.id = 1,
+		.id = 0,
 		.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
 		.resources = wm831x_dcdc1_resources,
 	},
 	{
 		.name = "wm831x-buckv",
-		.id = 2,
+		.id = 1,
 		.num_resources = ARRAY_SIZE(wm831x_dcdc2_resources),
 		.resources = wm831x_dcdc2_resources,
 	},
 	{
 		.name = "wm831x-buckp",
-		.id = 3,
+		.id = 2,
 		.num_resources = ARRAY_SIZE(wm831x_dcdc3_resources),
 		.resources = wm831x_dcdc3_resources,
 	},
 	{
 		.name = "wm831x-buckp",
-		.id = 4,
+		.id = 3,
 		.num_resources = ARRAY_SIZE(wm8320_dcdc4_buck_resources),
 		.resources = wm8320_dcdc4_buck_resources,
 	},
 	{
 		.name = "wm831x-clk",
+		.id = -1,
 	},
 	{
 		.name = "wm831x-gpio",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_gpio_resources),
 		.resources = wm831x_gpio_resources,
 	},
 	{
 		.name = "wm831x-hwmon",
+		.id = -1,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 1,
+		.id = 0,
 		.num_resources = ARRAY_SIZE(wm831x_ldo1_resources),
 		.resources = wm831x_ldo1_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 2,
+		.id = 1,
 		.num_resources = ARRAY_SIZE(wm831x_ldo2_resources),
 		.resources = wm831x_ldo2_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 3,
+		.id = 2,
 		.num_resources = ARRAY_SIZE(wm831x_ldo3_resources),
 		.resources = wm831x_ldo3_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 4,
+		.id = 3,
 		.num_resources = ARRAY_SIZE(wm831x_ldo4_resources),
 		.resources = wm831x_ldo4_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 5,
+		.id = 4,
 		.num_resources = ARRAY_SIZE(wm831x_ldo5_resources),
 		.resources = wm831x_ldo5_resources,
 	},
 	{
 		.name = "wm831x-ldo",
-		.id = 6,
+		.id = 5,
 		.num_resources = ARRAY_SIZE(wm831x_ldo6_resources),
 		.resources = wm831x_ldo6_resources,
 	},
 	{
 		.name = "wm831x-aldo",
-		.id = 7,
+		.id = 6,
 		.num_resources = ARRAY_SIZE(wm831x_ldo7_resources),
 		.resources = wm831x_ldo7_resources,
 	},
 	{
 		.name = "wm831x-aldo",
-		.id = 8,
+		.id = 7,
 		.num_resources = ARRAY_SIZE(wm831x_ldo8_resources),
 		.resources = wm831x_ldo8_resources,
 	},
 	{
 		.name = "wm831x-aldo",
-		.id = 9,
+		.id = 8,
 		.num_resources = ARRAY_SIZE(wm831x_ldo9_resources),
 		.resources = wm831x_ldo9_resources,
 	},
 	{
 		.name = "wm831x-aldo",
-		.id = 10,
+		.id = 9,
 		.num_resources = ARRAY_SIZE(wm831x_ldo10_resources),
 		.resources = wm831x_ldo10_resources,
 	},
 	{
 		.name = "wm831x-alive-ldo",
-		.id = 11,
+		.id = 10,
 		.num_resources = ARRAY_SIZE(wm831x_ldo11_resources),
 		.resources = wm831x_ldo11_resources,
 	},
 	{
 		.name = "wm831x-on",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_on_resources),
 		.resources = wm831x_on_resources,
 	},
 	{
 		.name = "wm831x-status",
-		.id = 1,
+		.id = 0,
 		.num_resources = ARRAY_SIZE(wm831x_status1_resources),
 		.resources = wm831x_status1_resources,
 	},
 	{
 		.name = "wm831x-status",
-		.id = 2,
+		.id = 1,
 		.num_resources = ARRAY_SIZE(wm831x_status2_resources),
 		.resources = wm831x_status2_resources,
 	},
 	{
 		.name = "wm831x-watchdog",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_wdt_resources),
 		.resources = wm831x_wdt_resources,
 	},
@@ -1581,6 +1608,7 @@ static const struct mfd_cell wm8320_devs[] = {
 static const struct mfd_cell touch_devs[] = {
 	{
 		.name = "wm831x-touch",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_touch_resources),
 		.resources = wm831x_touch_resources,
 	},
@@ -1589,6 +1617,7 @@ static const struct mfd_cell touch_devs[] = {
 static const struct mfd_cell rtc_devs[] = {
 	{
 		.name = "wm831x-rtc",
+		.id = -1,
 		.num_resources = ARRAY_SIZE(wm831x_rtc_resources),
 		.resources = wm831x_rtc_resources,
 	},
@@ -1597,6 +1626,7 @@ static const struct mfd_cell rtc_devs[] = {
 static const struct mfd_cell backlight_devs[] = {
 	{
 		.name = "wm831x-backlight",
+		.id = -1,
 	},
 };
 
@@ -1774,7 +1804,7 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
 	if (pdata && pdata->wm831x_num)
 		wm831x_num = pdata->wm831x_num * 10;
 	else
-		wm831x_num = -1;
+		wm831x_num = 0;
 
 	ret = wm831x_irq_init(wm831x, irq);
 	if (ret != 0)
-- 
1.8.2.3

[PATCH v2 5/5] mfd: da9052: Fix platform device names

[Bartlomiej Zolnierkiewicz]

Commit 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
changed the way platform device ids are generated from mfd id base and
cell ids in mfd_add_device().  Unfortunately the change in question
breaks mfd drivers which are using mfd_add_devices() with mfd id base
equal to -1 and non-zero cell ids (used to distinguish cells with
the same name field).  The result is that mfd core tries to register
platform devices with the same name which obviously fails and leads
to mfd device probe failure.

Changing mfd_add_devices() mfd id base from -1 to 0 and at the same
time setting proper cell ids for all cells fixes the issue.

In case of da9052 mfd driver the issue has already been fixed by
commit b3f6c73db732 ("mfd: da9052-core: Fix platform-device id
collision").  Unfortunately as the fix makes auto devid generation
to be used for all mfd platform devices it causes unneccessary change
of platform device names.  Fix the driver to use the original names.

Cc: Johan Hovold <johan@kernel.org>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Support Opensource <support.opensource@diasemi.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
---
 drivers/mfd/da9052-core.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/drivers/mfd/da9052-core.c b/drivers/mfd/da9052-core.c
index ae498b5..77d41ad 100644
--- a/drivers/mfd/da9052-core.c
+++ b/drivers/mfd/da9052-core.c
@@ -433,6 +433,10 @@ EXPORT_SYMBOL_GPL(da9052_adc_read_temp);
 static const struct mfd_cell da9052_subdev_info[] = {
 	{
 		.name = "da9052-regulator",
+		.id = 0,
+	},
+	{
+		.name = "da9052-regulator",
 		.id = 1,
 	},
 	{
@@ -484,41 +488,48 @@ static const struct mfd_cell da9052_subdev_info[] = {
 		.id = 13,
 	},
 	{
-		.name = "da9052-regulator",
-		.id = 14,
-	},
-	{
 		.name = "da9052-onkey",
+		.id = -1,
 	},
 	{
 		.name = "da9052-rtc",
+		.id = -1,
 	},
 	{
 		.name = "da9052-gpio",
+		.id = -1,
 	},
 	{
 		.name = "da9052-hwmon",
+		.id = -1,
 	},
 	{
 		.name = "da9052-leds",
+		.id = -1,
 	},
 	{
 		.name = "da9052-wled1",
+		.id = -1,
 	},
 	{
 		.name = "da9052-wled2",
+		.id = -1,
 	},
 	{
 		.name = "da9052-wled3",
+		.id = -1,
 	},
 	{
 		.name = "da9052-tsi",
+		.id = -1,
 	},
 	{
 		.name = "da9052-bat",
+		.id = -1,
 	},
 	{
 		.name = "da9052-watchdog",
+		.id = -1,
 	},
 };
 
@@ -554,7 +565,7 @@ int da9052_device_init(struct da9052 *da9052, u8 chip_id)
 		return ret;
 	}
 
-	ret = mfd_add_devices(da9052->dev, PLATFORM_DEVID_AUTO,
+	ret = mfd_add_devices(da9052->dev, 0,
 			      da9052_subdev_info,
 			      ARRAY_SIZE(da9052_subdev_info), NULL, 0, NULL);
 	if (ret) {
-- 
1.8.2.3

Re: [PATCH v2 0/5] mfd: Fix platform device ids to avoid probe failure

[Johan Hovold]

On Fri, Mar 20, 2015 at 08:23:18PM +0100, Bartlomiej Zolnierkiewicz wrote:

> Commit 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
> changed the way platform device ids are generated from mfd id base and
> cell ids in mfd_add_device().  Unfortunately the change in question
> breaks mfd drivers which are using mfd_add_devices() with mfd id base
> equal to -1 and non-zero cell ids (used to distinguish cells with
> the same name field).  The result is that mfd core tries to register
> platform devices with the same name which obviously fails and leads
> to mfd device probe failure.

First of all, thanks for finding these. I obviously overlooked this
class of drivers when fixing the device-id generation.

> Changing mfd_add_devices() mfd id base from -1 to 0 and at the same
> time setting proper cell ids for all cells fixes the issue.

This is however not the right fix. Instead you should be using
PLATFORM_DEVID_AUTO and keep the non-zero cell-ids as is, as this will
allow more than one mfd-device to be registered without resorting to
hacks.

Have a look at wm831x, for example, which offsets the device id base if
a wm831x_num parameter is passed in platform data (non-dt) to allow more
than one device to be registered. Your patch would break this, and still
not provide any other way to have multiple devices in a system.

Your changes would also break da9052, which would no longer allow more
than one device to be registered, something which was already fixed once
by commit b3f6c73db732 ("mfd: da9052-core: Fix platform-device id
collision").

Thanks,
Johan

Re: [PATCH v2 0/5] mfd: Fix platform device ids to avoid probe failure

[Bartlomiej Zolnierkiewicz]

Hi,

On Monday, March 23, 2015 11:07:18 AM Johan Hovold wrote:
> On Fri, Mar 20, 2015 at 08:23:18PM +0100, Bartlomiej Zolnierkiewicz wrote:
> 
> > Commit 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
> > changed the way platform device ids are generated from mfd id base and
> > cell ids in mfd_add_device().  Unfortunately the change in question
> > breaks mfd drivers which are using mfd_add_devices() with mfd id base
> > equal to -1 and non-zero cell ids (used to distinguish cells with
> > the same name field).  The result is that mfd core tries to register
> > platform devices with the same name which obviously fails and leads
> > to mfd device probe failure.
> 
> First of all, thanks for finding these. I obviously overlooked this
> class of drivers when fixing the device-id generation.
> 
> > Changing mfd_add_devices() mfd id base from -1 to 0 and at the same
> > time setting proper cell ids for all cells fixes the issue.
> 
> This is however not the right fix. Instead you should be using
> PLATFORM_DEVID_AUTO and keep the non-zero cell-ids as is, as this will
> allow more than one mfd-device to be registered without resorting to
> hacks.

Conversion of a driver to use PLATFORM_DEVID_AUTO changes names of
all platform devices registered by the driver.  In my patchset I just
tried to restore the broken functionality (patch that broke it went
in v3.19).  I thought that it was the best solution for v3.19 and
v4.0-rc4 (then PLATFORM_DEVID_AUTO conversion can be done sometime
later, i.e. in v4.1).

> Have a look at wm831x, for example, which offsets the device id base if
> a wm831x_num parameter is passed in platform data (non-dt) to allow more
> than one device to be registered. Your patch would break this, and still
> not provide any other way to have multiple devices in a system.

OK, I see the problem with wm831x driver and will provide v3 of my
patchset which would use PLATFORM_DEVID_AUTO for all drivers.

> Your changes would also break da9052, which would no longer allow more
> than one device to be registered, something which was already fixed once
> by commit b3f6c73db732 ("mfd: da9052-core: Fix platform-device id
> collision").

OK, patch #5 should be just dropped.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

Re: [PATCH v2 0/5] mfd: Fix platform device ids to avoid probe failure

[Johan Hovold]

On Mon, Mar 23, 2015 at 02:11:50PM +0100, Bartlomiej Zolnierkiewicz wrote:
> On Monday, March 23, 2015 11:07:18 AM Johan Hovold wrote:
> > On Fri, Mar 20, 2015 at 08:23:18PM +0100, Bartlomiej Zolnierkiewicz wrote:
> > 
> > > Commit 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
> > > changed the way platform device ids are generated from mfd id base and
> > > cell ids in mfd_add_device().  Unfortunately the change in question
> > > breaks mfd drivers which are using mfd_add_devices() with mfd id base
> > > equal to -1 and non-zero cell ids (used to distinguish cells with
> > > the same name field).  The result is that mfd core tries to register
> > > platform devices with the same name which obviously fails and leads
> > > to mfd device probe failure.
> > 
> > First of all, thanks for finding these. I obviously overlooked this
> > class of drivers when fixing the device-id generation.
> > 
> > > Changing mfd_add_devices() mfd id base from -1 to 0 and at the same
> > > time setting proper cell ids for all cells fixes the issue.
> > 
> > This is however not the right fix. Instead you should be using
> > PLATFORM_DEVID_AUTO and keep the non-zero cell-ids as is, as this will
> > allow more than one mfd-device to be registered without resorting to
> > hacks.
> 
> Conversion of a driver to use PLATFORM_DEVID_AUTO changes names of
> all platform devices registered by the driver.  In my patchset I just
> tried to restore the broken functionality (patch that broke it went
> in v3.19).  I thought that it was the best solution for v3.19 and
> v4.0-rc4 (then PLATFORM_DEVID_AUTO conversion can be done sometime
> later, i.e. in v4.1).

I think you're right. We should do the conversion to PLATFORM_DEVID_AUTO
later.

I'm responding to this mail with two patches for v4.0 fixing the da9052
driver, which is currently broken although not in the way suggested by
your v1-series, and the other drivers you identified by doing a partial
revert of commit 6e3f62f0793e ("mfd: core: Fix platform-device id
generation").

Thanks,
Johan

[PATCH 1/2] mfd: da9052: fix broken regulator probe

[Johan Hovold]

Fix broken probe of da9052 regulators, which since commit b3f6c73db732
("mfd: da9052-core: Fix platform-device id collision") use a
non-deterministic platform-device id to retrieve static regulator
information. Fortunately, adequate error handling was in place so probe
would simply fail with an error message.

Update the mfd-cell ids to be zero-based and use those to identify the
cells when probing the regulator devices.

Fixes: b3f6c73db732 ("mfd: da9052-core: Fix platform-device id collision")
Cc: stable <stable@vger.kernel.org>	# v3.19
Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/mfd/da9052-core.c            | 8 ++++----
 drivers/regulator/da9052-regulator.c | 5 +++--
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/mfd/da9052-core.c b/drivers/mfd/da9052-core.c
index ae498b53ee40..46e3840c7a37 100644
--- a/drivers/mfd/da9052-core.c
+++ b/drivers/mfd/da9052-core.c
@@ -433,6 +433,10 @@ EXPORT_SYMBOL_GPL(da9052_adc_read_temp);
 static const struct mfd_cell da9052_subdev_info[] = {
 	{
 		.name = "da9052-regulator",
+		.id = 0,
+	},
+	{
+		.name = "da9052-regulator",
 		.id = 1,
 	},
 	{
@@ -484,10 +488,6 @@ static const struct mfd_cell da9052_subdev_info[] = {
 		.id = 13,
 	},
 	{
-		.name = "da9052-regulator",
-		.id = 14,
-	},
-	{
 		.name = "da9052-onkey",
 	},
 	{
diff --git a/drivers/regulator/da9052-regulator.c b/drivers/regulator/da9052-regulator.c
index 8a4df7a1f2ee..e628d4c2f2ae 100644
--- a/drivers/regulator/da9052-regulator.c
+++ b/drivers/regulator/da9052-regulator.c
@@ -394,6 +394,7 @@ static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
 
 static int da9052_regulator_probe(struct platform_device *pdev)
 {
+	const struct mfd_cell *cell = mfd_get_cell(pdev);
 	struct regulator_config config = { };
 	struct da9052_regulator *regulator;
 	struct da9052 *da9052;
@@ -409,7 +410,7 @@ static int da9052_regulator_probe(struct platform_device *pdev)
 	regulator->da9052 = da9052;
 
 	regulator->info = find_regulator_info(regulator->da9052->chip_id,
-					      pdev->id);
+					      cell->id);
 	if (regulator->info == NULL) {
 		dev_err(&pdev->dev, "invalid regulator ID specified\n");
 		return -EINVAL;
@@ -419,7 +420,7 @@ static int da9052_regulator_probe(struct platform_device *pdev)
 	config.driver_data = regulator;
 	config.regmap = da9052->regmap;
 	if (pdata && pdata->regulators) {
-		config.init_data = pdata->regulators[pdev->id];
+		config.init_data = pdata->regulators[cell->id];
 	} else {
 #ifdef CONFIG_OF
 		struct device_node *nproot = da9052->dev->of_node;
-- 
2.0.5

[PATCH 2/2] mfd: core: fix platform-device name collisions

[Johan Hovold]

Since commit 6e3f62f0793e ("mfd: core: Fix platform-device id
generation") we honour PLATFORM_DEVID_AUTO and PLATFORM_DEVID_NONE when
registering mfd-devices.

Unfortunately, some mfd-drivers rely on the old behaviour of generating
platform-device ids by adding the cell id also to the special value of
PLATFORM_DEVID_NONE. The resulting platform ids are not only used to
generate device-unique names, but are also used instead of the cell id
to identify cells when probing subdevices.

These drivers should be updated to use PLATFORM_DEVID_AUTO, which would
also allow more than one device to be registered without resorting to
hacks (see for example wm831x), but lets fix the regression first by
partially reverting the above mentioned commit with respect to
PLATFORM_DEVID_NONE.

Fixes: 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
Cc: stable <stable@vger.kernel.org>	# v3.19
Reported-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/mfd/mfd-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
index 2a87f69be53d..1aed3b7b8d9b 100644
--- a/drivers/mfd/mfd-core.c
+++ b/drivers/mfd/mfd-core.c
@@ -128,7 +128,7 @@ static int mfd_add_device(struct device *parent, int id,
 	int platform_id;
 	int r;
 
-	if (id < 0)
+	if (id == PLATFORM_DEVID_AUTO)
 		platform_id = id;
 	else
 		platform_id = id + cell->id;
-- 
2.0.5

Re: [PATCH 2/2] mfd: core: fix platform-device name collisions

[Bartlomiej Zolnierkiewicz]

Hi,

On Wednesday, March 25, 2015 12:07:05 PM Johan Hovold wrote:
> Since commit 6e3f62f0793e ("mfd: core: Fix platform-device id
> generation") we honour PLATFORM_DEVID_AUTO and PLATFORM_DEVID_NONE when
> registering mfd-devices.
> 
> Unfortunately, some mfd-drivers rely on the old behaviour of generating
> platform-device ids by adding the cell id also to the special value of
> PLATFORM_DEVID_NONE. The resulting platform ids are not only used to
> generate device-unique names, but are also used instead of the cell id
> to identify cells when probing subdevices.
> 
> These drivers should be updated to use PLATFORM_DEVID_AUTO, which would
> also allow more than one device to be registered without resorting to
> hacks (see for example wm831x), but lets fix the regression first by
> partially reverting the above mentioned commit with respect to
> PLATFORM_DEVID_NONE.
> 
> Fixes: 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
> Cc: stable <stable@vger.kernel.org>	# v3.19
> Reported-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> Signed-off-by: Johan Hovold <johan@kernel.org>

Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

> ---
>  drivers/mfd/mfd-core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
> index 2a87f69be53d..1aed3b7b8d9b 100644
> --- a/drivers/mfd/mfd-core.c
> +++ b/drivers/mfd/mfd-core.c
> @@ -128,7 +128,7 @@ static int mfd_add_device(struct device *parent, int id,
>  	int platform_id;
>  	int r;
>  
> -	if (id < 0)
> +	if (id == PLATFORM_DEVID_AUTO)
>  		platform_id = id;
>  	else
>  		platform_id = id + cell->id;

Re: [PATCH 2/2] mfd: core: fix platform-device name collisions

[Lee Jones]

On Wed, 25 Mar 2015, Johan Hovold wrote:

> Since commit 6e3f62f0793e ("mfd: core: Fix platform-device id
> generation") we honour PLATFORM_DEVID_AUTO and PLATFORM_DEVID_NONE when
> registering mfd-devices.
> 
> Unfortunately, some mfd-drivers rely on the old behaviour of generating
> platform-device ids by adding the cell id also to the special value of
> PLATFORM_DEVID_NONE. The resulting platform ids are not only used to
> generate device-unique names, but are also used instead of the cell id
> to identify cells when probing subdevices.
> 
> These drivers should be updated to use PLATFORM_DEVID_AUTO, which would
> also allow more than one device to be registered without resorting to
> hacks (see for example wm831x), but lets fix the regression first by
> partially reverting the above mentioned commit with respect to
> PLATFORM_DEVID_NONE.
> 
> Fixes: 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
> Cc: stable <stable@vger.kernel.org>	# v3.19
> Reported-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> Signed-off-by: Johan Hovold <johan@kernel.org>
> ---
>  drivers/mfd/mfd-core.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Applied, thanks.

> diff --git a/drivers/mfd/mfd-core.c b/drivers/mfd/mfd-core.c
> index 2a87f69be53d..1aed3b7b8d9b 100644
> --- a/drivers/mfd/mfd-core.c
> +++ b/drivers/mfd/mfd-core.c
> @@ -128,7 +128,7 @@ static int mfd_add_device(struct device *parent, int id,
>  	int platform_id;
>  	int r;
>  
> -	if (id < 0)
> +	if (id == PLATFORM_DEVID_AUTO)
>  		platform_id = id;
>  	else
>  		platform_id = id + cell->id;

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

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Bartlomiej Zolnierkiewicz]

Hi,

On Wednesday, March 25, 2015 12:07:04 PM Johan Hovold wrote:
> Fix broken probe of da9052 regulators, which since commit b3f6c73db732
> ("mfd: da9052-core: Fix platform-device id collision") use a
> non-deterministic platform-device id to retrieve static regulator
> information. Fortunately, adequate error handling was in place so probe
> would simply fail with an error message.
> 
> Update the mfd-cell ids to be zero-based and use those to identify the
> cells when probing the regulator devices.
> 
> Fixes: b3f6c73db732 ("mfd: da9052-core: Fix platform-device id collision")
> Cc: stable <stable@vger.kernel.org>	# v3.19
> Signed-off-by: Johan Hovold <johan@kernel.org>

Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics

> ---
>  drivers/mfd/da9052-core.c            | 8 ++++----
>  drivers/regulator/da9052-regulator.c | 5 +++--
>  2 files changed, 7 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/mfd/da9052-core.c b/drivers/mfd/da9052-core.c
> index ae498b53ee40..46e3840c7a37 100644
> --- a/drivers/mfd/da9052-core.c
> +++ b/drivers/mfd/da9052-core.c
> @@ -433,6 +433,10 @@ EXPORT_SYMBOL_GPL(da9052_adc_read_temp);
>  static const struct mfd_cell da9052_subdev_info[] = {
>  	{
>  		.name = "da9052-regulator",
> +		.id = 0,
> +	},
> +	{
> +		.name = "da9052-regulator",
>  		.id = 1,
>  	},
>  	{
> @@ -484,10 +488,6 @@ static const struct mfd_cell da9052_subdev_info[] = {
>  		.id = 13,
>  	},
>  	{
> -		.name = "da9052-regulator",
> -		.id = 14,
> -	},
> -	{
>  		.name = "da9052-onkey",
>  	},
>  	{
> diff --git a/drivers/regulator/da9052-regulator.c b/drivers/regulator/da9052-regulator.c
> index 8a4df7a1f2ee..e628d4c2f2ae 100644
> --- a/drivers/regulator/da9052-regulator.c
> +++ b/drivers/regulator/da9052-regulator.c
> @@ -394,6 +394,7 @@ static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
>  
>  static int da9052_regulator_probe(struct platform_device *pdev)
>  {
> +	const struct mfd_cell *cell = mfd_get_cell(pdev);
>  	struct regulator_config config = { };
>  	struct da9052_regulator *regulator;
>  	struct da9052 *da9052;
> @@ -409,7 +410,7 @@ static int da9052_regulator_probe(struct platform_device *pdev)
>  	regulator->da9052 = da9052;
>  
>  	regulator->info = find_regulator_info(regulator->da9052->chip_id,
> -					      pdev->id);
> +					      cell->id);
>  	if (regulator->info == NULL) {
>  		dev_err(&pdev->dev, "invalid regulator ID specified\n");
>  		return -EINVAL;
> @@ -419,7 +420,7 @@ static int da9052_regulator_probe(struct platform_device *pdev)
>  	config.driver_data = regulator;
>  	config.regmap = da9052->regmap;
>  	if (pdata && pdata->regulators) {
> -		config.init_data = pdata->regulators[pdev->id];
> +		config.init_data = pdata->regulators[cell->id];
>  	} else {
>  #ifdef CONFIG_OF
>  		struct device_node *nproot = da9052->dev->of_node;

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Lee Jones]

On Wed, 25 Mar 2015, Johan Hovold wrote:

> Fix broken probe of da9052 regulators, which since commit b3f6c73db732
> ("mfd: da9052-core: Fix platform-device id collision") use a
> non-deterministic platform-device id to retrieve static regulator
> information. Fortunately, adequate error handling was in place so probe
> would simply fail with an error message.
> 
> Update the mfd-cell ids to be zero-based and use those to identify the
> cells when probing the regulator devices.
> 
> Fixes: b3f6c73db732 ("mfd: da9052-core: Fix platform-device id collision")
> Cc: stable <stable@vger.kernel.org>	# v3.19
> Signed-off-by: Johan Hovold <johan@kernel.org>
> ---
>  drivers/mfd/da9052-core.c            | 8 ++++----
>  drivers/regulator/da9052-regulator.c | 5 +++--

Need an Ack from Mark, but looks good to me.

Acked-by: Lee Jones <lee.jones@linaro.org>

>  2 files changed, 7 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/mfd/da9052-core.c b/drivers/mfd/da9052-core.c
> index ae498b53ee40..46e3840c7a37 100644
> --- a/drivers/mfd/da9052-core.c
> +++ b/drivers/mfd/da9052-core.c
> @@ -433,6 +433,10 @@ EXPORT_SYMBOL_GPL(da9052_adc_read_temp);
>  static const struct mfd_cell da9052_subdev_info[] = {
>  	{
>  		.name = "da9052-regulator",
> +		.id = 0,
> +	},
> +	{
> +		.name = "da9052-regulator",
>  		.id = 1,
>  	},
>  	{
> @@ -484,10 +488,6 @@ static const struct mfd_cell da9052_subdev_info[] = {
>  		.id = 13,
>  	},
>  	{
> -		.name = "da9052-regulator",
> -		.id = 14,
> -	},
> -	{
>  		.name = "da9052-onkey",
>  	},
>  	{
> diff --git a/drivers/regulator/da9052-regulator.c b/drivers/regulator/da9052-regulator.c
> index 8a4df7a1f2ee..e628d4c2f2ae 100644
> --- a/drivers/regulator/da9052-regulator.c
> +++ b/drivers/regulator/da9052-regulator.c
> @@ -394,6 +394,7 @@ static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
>  
>  static int da9052_regulator_probe(struct platform_device *pdev)
>  {
> +	const struct mfd_cell *cell = mfd_get_cell(pdev);
>  	struct regulator_config config = { };
>  	struct da9052_regulator *regulator;
>  	struct da9052 *da9052;
> @@ -409,7 +410,7 @@ static int da9052_regulator_probe(struct platform_device *pdev)
>  	regulator->da9052 = da9052;
>  
>  	regulator->info = find_regulator_info(regulator->da9052->chip_id,
> -					      pdev->id);
> +					      cell->id);
>  	if (regulator->info == NULL) {
>  		dev_err(&pdev->dev, "invalid regulator ID specified\n");
>  		return -EINVAL;
> @@ -419,7 +420,7 @@ static int da9052_regulator_probe(struct platform_device *pdev)
>  	config.driver_data = regulator;
>  	config.regmap = da9052->regmap;
>  	if (pdata && pdata->regulators) {
> -		config.init_data = pdata->regulators[pdev->id];
> +		config.init_data = pdata->regulators[cell->id];
>  	} else {
>  #ifdef CONFIG_OF
>  		struct device_node *nproot = da9052->dev->of_node;

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

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Johan Hovold]

Hi Mark and Lee,

On Thu, Mar 26, 2015 at 08:32:09AM +0000, Lee Jones wrote:
> On Wed, 25 Mar 2015, Johan Hovold wrote:
> 
> > Fix broken probe of da9052 regulators, which since commit b3f6c73db732
> > ("mfd: da9052-core: Fix platform-device id collision") use a
> > non-deterministic platform-device id to retrieve static regulator
> > information. Fortunately, adequate error handling was in place so probe
> > would simply fail with an error message.
> > 
> > Update the mfd-cell ids to be zero-based and use those to identify the
> > cells when probing the regulator devices.
> > 
> > Fixes: b3f6c73db732 ("mfd: da9052-core: Fix platform-device id collision")
> > Cc: stable <stable@vger.kernel.org>	# v3.19
> > Signed-off-by: Johan Hovold <johan@kernel.org>
> > ---
> >  drivers/mfd/da9052-core.c            | 8 ++++----
> >  drivers/regulator/da9052-regulator.c | 5 +++--
> 
> Need an Ack from Mark, but looks good to me.
> 
> Acked-by: Lee Jones <lee.jones@linaro.org>

Mark, did you have a chance to look at this one?

It fixes a regression due to an mfd commit, but not sure who of you that
wants to take it.

Thanks,
Johan

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Johan Hovold]

On Tue, Apr 14, 2015 at 03:04:06PM +0200, Johan Hovold wrote:
> Hi Mark and Lee,
> 
> On Thu, Mar 26, 2015 at 08:32:09AM +0000, Lee Jones wrote:
> > On Wed, 25 Mar 2015, Johan Hovold wrote:
> > 
> > > Fix broken probe of da9052 regulators, which since commit b3f6c73db732
> > > ("mfd: da9052-core: Fix platform-device id collision") use a
> > > non-deterministic platform-device id to retrieve static regulator
> > > information. Fortunately, adequate error handling was in place so probe
> > > would simply fail with an error message.
> > > 
> > > Update the mfd-cell ids to be zero-based and use those to identify the
> > > cells when probing the regulator devices.
> > > 
> > > Fixes: b3f6c73db732 ("mfd: da9052-core: Fix platform-device id collision")
> > > Cc: stable <stable@vger.kernel.org>	# v3.19
> > > Signed-off-by: Johan Hovold <johan@kernel.org>
> > > ---
> > >  drivers/mfd/da9052-core.c            | 8 ++++----
> > >  drivers/regulator/da9052-regulator.c | 5 +++--
> > 
> > Need an Ack from Mark, but looks good to me.
> > 
> > Acked-by: Lee Jones <lee.jones@linaro.org>
> 
> Mark, did you have a chance to look at this one?
> 
> It fixes a regression due to an mfd commit, but not sure who of you that
> wants to take it.

It's now been over a month and this still hasn't been applied even
though it fixes a regression.

Lee, perhaps you should take it through MFD as it was an MFD commit that
broke it?

Johan

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Lee Jones]

On Wed, 29 Apr 2015, Johan Hovold wrote:

> On Tue, Apr 14, 2015 at 03:04:06PM +0200, Johan Hovold wrote:
> > Hi Mark and Lee,
> > 
> > On Thu, Mar 26, 2015 at 08:32:09AM +0000, Lee Jones wrote:
> > > On Wed, 25 Mar 2015, Johan Hovold wrote:
> > > 
> > > > Fix broken probe of da9052 regulators, which since commit b3f6c73db732
> > > > ("mfd: da9052-core: Fix platform-device id collision") use a
> > > > non-deterministic platform-device id to retrieve static regulator
> > > > information. Fortunately, adequate error handling was in place so probe
> > > > would simply fail with an error message.
> > > > 
> > > > Update the mfd-cell ids to be zero-based and use those to identify the
> > > > cells when probing the regulator devices.
> > > > 
> > > > Fixes: b3f6c73db732 ("mfd: da9052-core: Fix platform-device id collision")
> > > > Cc: stable <stable@vger.kernel.org>	# v3.19
> > > > Signed-off-by: Johan Hovold <johan@kernel.org>
> > > > ---
> > > >  drivers/mfd/da9052-core.c            | 8 ++++----
> > > >  drivers/regulator/da9052-regulator.c | 5 +++--
> > > 
> > > Need an Ack from Mark, but looks good to me.
> > > 
> > > Acked-by: Lee Jones <lee.jones@linaro.org>
> > 
> > Mark, did you have a chance to look at this one?
> > 
> > It fixes a regression due to an mfd commit, but not sure who of you that
> > wants to take it.
> 
> It's now been over a month and this still hasn't been applied even
> though it fixes a regression.
> 
> Lee, perhaps you should take it through MFD as it was an MFD commit that
> broke it?

I'm in the same situation -- can't do anything without an Ack from Mark.

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

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Lee Jones]

On Wed, 29 Apr 2015, Lee Jones wrote:

> On Wed, 29 Apr 2015, Johan Hovold wrote:
> 
> > On Tue, Apr 14, 2015 at 03:04:06PM +0200, Johan Hovold wrote:
> > > Hi Mark and Lee,
> > > 
> > > On Thu, Mar 26, 2015 at 08:32:09AM +0000, Lee Jones wrote:
> > > > On Wed, 25 Mar 2015, Johan Hovold wrote:
> > > > 
> > > > > Fix broken probe of da9052 regulators, which since commit b3f6c73db732
> > > > > ("mfd: da9052-core: Fix platform-device id collision") use a
> > > > > non-deterministic platform-device id to retrieve static regulator
> > > > > information. Fortunately, adequate error handling was in place so probe
> > > > > would simply fail with an error message.
> > > > > 
> > > > > Update the mfd-cell ids to be zero-based and use those to identify the
> > > > > cells when probing the regulator devices.
> > > > > 
> > > > > Fixes: b3f6c73db732 ("mfd: da9052-core: Fix platform-device id collision")
> > > > > Cc: stable <stable@vger.kernel.org>	# v3.19
> > > > > Signed-off-by: Johan Hovold <johan@kernel.org>
> > > > > ---
> > > > >  drivers/mfd/da9052-core.c            | 8 ++++----
> > > > >  drivers/regulator/da9052-regulator.c | 5 +++--
> > > > 
> > > > Need an Ack from Mark, but looks good to me.
> > > > 
> > > > Acked-by: Lee Jones <lee.jones@linaro.org>
> > > 
> > > Mark, did you have a chance to look at this one?
> > > 
> > > It fixes a regression due to an mfd commit, but not sure who of you that
> > > wants to take it.
> > 
> > It's now been over a month and this still hasn't been applied even
> > though it fixes a regression.
> > 
> > Lee, perhaps you should take it through MFD as it was an MFD commit that
> > broke it?
> 
> I'm in the same situation -- can't do anything without an Ack from Mark.

I happen to know that Mark regularly deletes his mail.

Can you re-sent this complete with collected Acks please?

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

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 656 bytes --]

On Wed, May 13, 2015 at 04:43:33PM +0100, Lee Jones wrote:
> On Wed, 29 Apr 2015, Lee Jones wrote:

> > I'm in the same situation -- can't do anything without an Ack from Mark.

> I happen to know that Mark regularly deletes his mail.

> Can you re-sent this complete with collected Acks please?

If you're looking for me to review something you need to send it to me,
and the chances of me looking at it are very much increased if there's a
relevant subject line.  I'm CCed (not even on the to list) on endless
large threads and reposts of patch serieses about MFD drivers most of
which are of very little relevance to me so they get ignored very
easily.

[-- Attachment #2: Digital signature --]
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Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Lee Jones]

On Wed, 13 May 2015, Mark Brown wrote:

> On Wed, May 13, 2015 at 04:43:33PM +0100, Lee Jones wrote:
> > On Wed, 29 Apr 2015, Lee Jones wrote:
> 
> > > I'm in the same situation -- can't do anything without an Ack from Mark.
> 
> > I happen to know that Mark regularly deletes his mail.
> 
> > Can you re-sent this complete with collected Acks please?
> 
> If you're looking for me to review something you need to send it to me,
> and the chances of me looking at it are very much increased if there's a
> relevant subject line.  I'm CCed (not even on the to list) on endless
> large threads and reposts of patch serieses about MFD drivers most of
> which are of very little relevance to me so they get ignored very
> easily.

Calm down dear, it's only a commercial.

I wasn't having a pop.  Rather empathising with your situation and
facilitating a resend that you're likely to see.

I'm sure Johan will do the right thing.

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

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 782 bytes --]

On Wed, May 13, 2015 at 05:54:19PM +0100, Lee Jones wrote:
> On Wed, 13 May 2015, Mark Brown wrote:

> > If you're looking for me to review something you need to send it to me,
> > and the chances of me looking at it are very much increased if there's a
> > relevant subject line.  I'm CCed (not even on the to list) on endless
> > large threads and reposts of patch serieses about MFD drivers most of
> > which are of very little relevance to me so they get ignored very
> > easily.

> Calm down dear, it's only a commercial.

> I wasn't having a pop.  Rather empathising with your situation and
> facilitating a resend that you're likely to see.

> I'm sure Johan will do the right thing.

My point is that a simple resend has a reasonable chance of getting
dropped on the floor.

[-- Attachment #2: Digital signature --]
[-- Type: application/pgp-signature, Size: 473 bytes --]

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Lee Jones]

On Wed, 13 May 2015, Mark Brown wrote:

> On Wed, May 13, 2015 at 05:54:19PM +0100, Lee Jones wrote:
> > On Wed, 13 May 2015, Mark Brown wrote:
> 
> > > If you're looking for me to review something you need to send it to me,
> > > and the chances of me looking at it are very much increased if there's a
> > > relevant subject line.  I'm CCed (not even on the to list) on endless
> > > large threads and reposts of patch serieses about MFD drivers most of
> > > which are of very little relevance to me so they get ignored very
> > > easily.
> 
> > Calm down dear, it's only a commercial.
> 
> > I wasn't having a pop.  Rather empathising with your situation and
> > facilitating a resend that you're likely to see.
> 
> > I'm sure Johan will do the right thing.
> 
> My point is that a simple resend has a reasonable chance of getting
> dropped on the floor.

As I say, I'm sure Johan will do what's required for that not to
happen.

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

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Johan Hovold]

On Thu, May 14, 2015 at 08:19:43AM +0100, Lee Jones wrote:
> On Wed, 13 May 2015, Mark Brown wrote:
> 
> > On Wed, May 13, 2015 at 05:54:19PM +0100, Lee Jones wrote:
> > > On Wed, 13 May 2015, Mark Brown wrote:
> > 
> > > > If you're looking for me to review something you need to send it to me,
> > > > and the chances of me looking at it are very much increased if there's a
> > > > relevant subject line.  I'm CCed (not even on the to list) on endless
> > > > large threads and reposts of patch serieses about MFD drivers most of
> > > > which are of very little relevance to me so they get ignored very
> > > > easily.
> > 
> > > Calm down dear, it's only a commercial.
> > 
> > > I wasn't having a pop.  Rather empathising with your situation and
> > > facilitating a resend that you're likely to see.
> > 
> > > I'm sure Johan will do the right thing.
> > 
> > My point is that a simple resend has a reasonable chance of getting
> > dropped on the floor.
> 
> As I say, I'm sure Johan will do what's required for that not to
> happen.

Seriously? *Me* do the right thing?

We have a regression in your subsystems (mfd/regulator) with a fix
that's been sitting in both your mailboxes since March 25th.

And now that Mark finally responds to a mail after repeated reminders
from both me and Lee, he still doesn't care enough to look up the
original mail or at least make sure that a resend does not get lost
again.

You two even work for the same organisation. Just pick up the phone or
find a way to get a message across that mail filter instead of wasting
everyone else's time.

I have resent the patch now. Please make sure it gets applied.

Johan

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Lee Jones]

On Fri, 15 May 2015, Johan Hovold wrote:
> On Thu, May 14, 2015 at 08:19:43AM +0100, Lee Jones wrote:
> > On Wed, 13 May 2015, Mark Brown wrote:
> > 
> > > On Wed, May 13, 2015 at 05:54:19PM +0100, Lee Jones wrote:
> > > > On Wed, 13 May 2015, Mark Brown wrote:
> > > 
> > > > > If you're looking for me to review something you need to send it to me,
> > > > > and the chances of me looking at it are very much increased if there's a
> > > > > relevant subject line.  I'm CCed (not even on the to list) on endless
> > > > > large threads and reposts of patch serieses about MFD drivers most of
> > > > > which are of very little relevance to me so they get ignored very
> > > > > easily.
> > > 
> > > > Calm down dear, it's only a commercial.
> > > 
> > > > I wasn't having a pop.  Rather empathising with your situation and
> > > > facilitating a resend that you're likely to see.
> > > 
> > > > I'm sure Johan will do the right thing.
> > > 
> > > My point is that a simple resend has a reasonable chance of getting
> > > dropped on the floor.
> > 
> > As I say, I'm sure Johan will do what's required for that not to
> > happen.
> 
> Seriously? *Me* do the right thing?

Yes, *you*.  If a patch slips though a Maintainer's net, which does
happen every so often [*], I'm sure even you are not infallible to
that, a submitter must issue a RESEND (as you have now just done so).

> We have a regression in your subsystems (mfd/regulator) with a fix
> that's been sitting in both your mailboxes since March 25th.

Fully aware and ready to apply once the correct process has been
carried out.  I get shirty when people submit MFD patches without
permission, and I refuse to be a hypocrite.

> And now that Mark finally responds to a mail after repeated reminders
> from both me and Lee, he still doesn't care enough to look up the
> original mail or at least make sure that a resend does not get lost
> again.

See [*] about how Mark deals with his torrent of daily mail.

> You two even work for the same organisation. 

Irrelevant.

> Just pick up the phone or
> find a way to get a message across that mail filter instead of wasting
> everyone else's time.
> 
> I have resent the patch now. Please make sure it gets applied.

[*] Especially when you receive as much email as Mark does.  To cope
he has a brain-highpass-filter on the subject line and purges his
inbox regularly.

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

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Johan Hovold]

On Mon, May 18, 2015 at 10:10:49AM +0100, Lee Jones wrote:
> On Fri, 15 May 2015, Johan Hovold wrote:
> > On Thu, May 14, 2015 at 08:19:43AM +0100, Lee Jones wrote:
> > > On Wed, 13 May 2015, Mark Brown wrote:
> > > 
> > > > On Wed, May 13, 2015 at 05:54:19PM +0100, Lee Jones wrote:
> > > > > On Wed, 13 May 2015, Mark Brown wrote:
> > > > 
> > > > > > If you're looking for me to review something you need to send it to me,
> > > > > > and the chances of me looking at it are very much increased if there's a
> > > > > > relevant subject line.  I'm CCed (not even on the to list) on endless
> > > > > > large threads and reposts of patch serieses about MFD drivers most of
> > > > > > which are of very little relevance to me so they get ignored very
> > > > > > easily.
> > > > 
> > > > > Calm down dear, it's only a commercial.
> > > > 
> > > > > I wasn't having a pop.  Rather empathising with your situation and
> > > > > facilitating a resend that you're likely to see.
> > > > 
> > > > > I'm sure Johan will do the right thing.
> > > > 
> > > > My point is that a simple resend has a reasonable chance of getting
> > > > dropped on the floor.
> > > 
> > > As I say, I'm sure Johan will do what's required for that not to
> > > happen.
> > 
> > Seriously? *Me* do the right thing?
> 
> Yes, *you*.  If a patch slips though a Maintainer's net, which does
> happen every so often [*], I'm sure even you are not infallible to
> that, a submitter must issue a RESEND (as you have now just done so).

As you know, five reminders asking for an ack from Mark was sent by the
two of us combined without even an indication that the messages had been
noted over a period of almost two months.

If Mark feels that he is getting spammed with unrelated MFD patches,
then *you* and Mark need to figure out a way to get a message across
when there actually is something he needs to look at.

I don't care if it's with a special [Lee-wants-Marks-ack] subject
prefix, an irc message on Linaro's channels or a phone call, but it's not
something that a patch submitter for MFD should need to know about
(it obviously isn't even documented).

> > We have a regression in your subsystems (mfd/regulator) with a fix
> > that's been sitting in both your mailboxes since March 25th.
> 
> Fully aware and ready to apply once the correct process has been
> carried out.  I get shirty when people submit MFD patches without
> permission, and I refuse to be a hypocrite.

That's perfectly fine. Your subsystems intersect and you two need to
figure out how you communicate. That's all.

Johan

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Lee Jones]

On Mon, 18 May 2015, Johan Hovold wrote:

> On Mon, May 18, 2015 at 10:10:49AM +0100, Lee Jones wrote:
> > On Fri, 15 May 2015, Johan Hovold wrote:
> > > On Thu, May 14, 2015 at 08:19:43AM +0100, Lee Jones wrote:
> > > > On Wed, 13 May 2015, Mark Brown wrote:
> > > > 
> > > > > On Wed, May 13, 2015 at 05:54:19PM +0100, Lee Jones wrote:
> > > > > > On Wed, 13 May 2015, Mark Brown wrote:
> > > > > 
> > > > > > > If you're looking for me to review something you need to send it to me,
> > > > > > > and the chances of me looking at it are very much increased if there's a
> > > > > > > relevant subject line.  I'm CCed (not even on the to list) on endless
> > > > > > > large threads and reposts of patch serieses about MFD drivers most of
> > > > > > > which are of very little relevance to me so they get ignored very
> > > > > > > easily.
> > > > > 
> > > > > > Calm down dear, it's only a commercial.
> > > > > 
> > > > > > I wasn't having a pop.  Rather empathising with your situation and
> > > > > > facilitating a resend that you're likely to see.
> > > > > 
> > > > > > I'm sure Johan will do the right thing.
> > > > > 
> > > > > My point is that a simple resend has a reasonable chance of getting
> > > > > dropped on the floor.
> > > > 
> > > > As I say, I'm sure Johan will do what's required for that not to
> > > > happen.
> > > 
> > > Seriously? *Me* do the right thing?
> > 
> > Yes, *you*.  If a patch slips though a Maintainer's net, which does
> > happen every so often [*], I'm sure even you are not infallible to
> > that, a submitter must issue a RESEND (as you have now just done so).
> 
> As you know, five reminders asking for an ack from Mark was sent by the
> two of us combined without even an indication that the messages had been
> noted over a period of almost two months.
> 
> If Mark feels that he is getting spammed with unrelated MFD patches,
> then *you* and Mark need to figure out a way to get a message across
> when there actually is something he needs to look at.
> 
> I don't care if it's with a special [Lee-wants-Marks-ack] subject
> prefix, an irc message on Linaro's channels or a phone call, but it's not
> something that a patch submitter for MFD should need to know about
> (it obviously isn't even documented).
> 
> > > We have a regression in your subsystems (mfd/regulator) with a fix
> > > that's been sitting in both your mailboxes since March 25th.
> > 
> > Fully aware and ready to apply once the correct process has been
> > carried out.  I get shirty when people submit MFD patches without
> > permission, and I refuse to be a hypocrite.
> 
> That's perfectly fine. Your subsystems intersect and you two need to
> figure out how you communicate. That's all.

This issue is out of the ordinary.  Normally Mark is pretty good at
providing me with the Acks I need.  More commonly I have issues such
as the one you are experiencing with non-responsive/inactive
Maintainers.

In future, for yourself and anyone else who is following this thread
for 'fun', if a patch crosses multiple subsystems (which I try to keep
to a minimum) it's probably best to indicate that in the subject line.

mfd: regulator: <blah>

... would definitely get Marks attention.  And yes, I know 'regulator'
is mentioned in the subject line of the particular patch. :)

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

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Mark Brown]

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On Mon, May 18, 2015 at 11:13:55AM +0100, Lee Jones wrote:

> In future, for yourself and anyone else who is following this thread
> for 'fun', if a patch crosses multiple subsystems (which I try to keep
> to a minimum) it's probably best to indicate that in the subject line.

> mfd: regulator: <blah>

> ... would definitely get Marks attention.  And yes, I know 'regulator'
> is mentioned in the subject line of the particular patch. :)

Yeah, sadly it's not visible in the thread view in mutt here since it's
too late in the subject line.  That is good advice, though - the
standard thing is either like you describe or "mfd/regulator: ".

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Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Mark Brown]

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On Mon, May 18, 2015 at 11:51:59AM +0200, Johan Hovold wrote:
> On Mon, May 18, 2015 at 10:10:49AM +0100, Lee Jones wrote:

> > Yes, *you*.  If a patch slips though a Maintainer's net, which does
> > happen every so often [*], I'm sure even you are not infallible to
> > that, a submitter must issue a RESEND (as you have now just done so).

> As you know, five reminders asking for an ack from Mark was sent by the
> two of us combined without even an indication that the messages had been
> noted over a period of almost two months.

The reason that there was no indication that the message had been noted
was that the message had in fact not been seen, nor had any of your
pings; one of the big problems here is that you are sending pings
instead of resending (which is something that does get frequent
pushback, Lee did advise you to resend).

> If Mark feels that he is getting spammed with unrelated MFD patches,
> then *you* and Mark need to figure out a way to get a message across
> when there actually is something he needs to look at.

Like I say, resending is the main advice here.

> I don't care if it's with a special [Lee-wants-Marks-ack] subject
> prefix, an irc message on Linaro's channels or a phone call, but it's not
> something that a patch submitter for MFD should need to know about
> (it obviously isn't even documented).

Resending is something that is pretty standard.  Most of the things that
can result in something not getting looked at also involve no longer
having a copy of the patch (so a resend will be needed anyway), and
often many of the others will result in the ping not being seen either
(for example it gets threaded in with the patch buried in the mailbox,
or it looks like the patch is generating lots of discussion and will
need a new version anyway).  At best it's going to require going and
finding the original mail, and they can be actively unhelpful.

A fresh copy of the patch in contrast fits naturally into the standard
workflow with no extra barriers.

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Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Johan Hovold]

On Mon, May 18, 2015 at 05:24:05PM +0100, Mark Brown wrote:
> On Mon, May 18, 2015 at 11:51:59AM +0200, Johan Hovold wrote:

> > If Mark feels that he is getting spammed with unrelated MFD patches,
> > then *you* and Mark need to figure out a way to get a message across
> > when there actually is something he needs to look at.
> 
> Like I say, resending is the main advice here.
> 
> > I don't care if it's with a special [Lee-wants-Marks-ack] subject
> > prefix, an irc message on Linaro's channels or a phone call, but it's not
> > something that a patch submitter for MFD should need to know about
> > (it obviously isn't even documented).
> 
> Resending is something that is pretty standard.  Most of the things that
> can result in something not getting looked at also involve no longer
> having a copy of the patch (so a resend will be needed anyway), and
> often many of the others will result in the ping not being seen either
> (for example it gets threaded in with the patch buried in the mailbox,
> or it looks like the patch is generating lots of discussion and will
> need a new version anyway).  At best it's going to require going and
> finding the original mail, and they can be actively unhelpful.
> 
> A fresh copy of the patch in contrast fits naturally into the standard
> workflow with no extra barriers.

Yes, resending is sometimes needed, but what set me off here was your
comment that resending might not be enough even after you've now become
aware of a several-month old regression in your subsystem.

I know you process a lot of mail, but perhaps some (further) filtering
could help avoid situations like this. The patch touches
drivers/regulator/ and has a stable tag for example.

Johan

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Mark Brown]

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On Mon, May 18, 2015 at 06:46:30PM +0200, Johan Hovold wrote:

> Yes, resending is sometimes needed, but what set me off here was your
> comment that resending might not be enough even after you've now become
> aware of a several-month old regression in your subsystem.

If you're referring to my original reply I'm afraid to disappoint you
but I hadn't read far enough in the backtrace to see anything except
that people wanted me to look at a patch I didn't have a copy of (I
didn't even know if I'd been CCed on the original posting).  I was
simply trying to say that it might be worth looking at other aspects of
how the patch was sent - what you got there was basically a form letter
type response to contentless pings.

> I know you process a lot of mail, but perhaps some (further) filtering
> could help avoid situations like this. The patch touches
> drivers/regulator/ and has a stable tag for example.

Neither of those is reliable enough for mechanical filtering for the
things I'm doing here I'm afraid, and I especially don't think it would
be a good idea people to get the idea that adding a stable tag is a good
way of jumping the queue and it's not that reliable an indication of
urgency (some development only issues that cause widespread breakage are
much more urgent, some stable patches are for things that are definite
issues with clear fixes but relatively low risk/impact).

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Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Johan Hovold]

On Mon, May 18, 2015 at 07:46:54PM +0100, Mark Brown wrote:
> On Mon, May 18, 2015 at 06:46:30PM +0200, Johan Hovold wrote:
> 
> > Yes, resending is sometimes needed, but what set me off here was your
> > comment that resending might not be enough even after you've now become
> > aware of a several-month old regression in your subsystem.
> 
> If you're referring to my original reply I'm afraid to disappoint you
> but I hadn't read far enough in the backtrace to see anything except
> that people wanted me to look at a patch I didn't have a copy of (I
> didn't even know if I'd been CCed on the original posting).  I was
> simply trying to say that it might be worth looking at other aspects of
> how the patch was sent - what you got there was basically a form letter
> type response to contentless pings.

I might have read too much into that response, but the pings were hardly
contentless (they all included the commit message and some the full patch).

Anyway, glad to see the issue resolved now. Thanks for the review.

Johan

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Mark Brown]

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On Tue, May 19, 2015 at 12:01:03PM +0200, Johan Hovold wrote:

> I might have read too much into that response, but the pings were hardly
> contentless (they all included the commit message and some the full patch).

It's the new content that is important here - if it boils down to "have
you looked at this yet" that's not really adding anything and if it's a
patch to be applied then it really needs to not be quoted.

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Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Johan Hovold]

On Tue, May 19, 2015 at 11:38:08AM +0100, Mark Brown wrote:
> On Tue, May 19, 2015 at 12:01:03PM +0200, Johan Hovold wrote:
> 
> > I might have read too much into that response, but the pings were hardly
> > contentless (they all included the commit message and some the full patch).
> 
> It's the new content that is important here - if it boils down to "have
> you looked at this yet" that's not really adding anything and if it's a
> patch to be applied then it really needs to not be quoted.

My reminders sent directly to you explicitly mentioned it being a
regression every time. That should trigger a maintainer's interest
enough to look at the quoted context or ask for a resend.

How should a patch submitter know that you simply drop mails with an mfd
prefix even if it's directed to you? Unless documented somewhere, that's
were Lee can help through being familiar with the quirks of your work flow.

Johan

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Mark Brown]

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On Tue, May 19, 2015 at 01:01:19PM +0200, Johan Hovold wrote:

> My reminders sent directly to you explicitly mentioned it being a
> regression every time. That should trigger a maintainer's interest
> enough to look at the quoted context or ask for a resend.

Sadly what I actually ended up reading was Lee's reply not one of your
mails.

> How should a patch submitter know that you simply drop mails with an mfd
> prefix even if it's directed to you? Unless documented somewhere, that's
> were Lee can help through being familiar with the quirks of your work flow.

I don't drop *all* such mails, this isn't a rules based thing but rather
something that depends on a bunch of factors including how busy I am at
that particular moment.  MFD discussions (even more so than patches) are
certainly a bit of a warning sign here but that's not the only factor
and there are positives as well as negatives.  For example very broad CC
lists on driver specific patches usually indicate that someone just sent
the mail to everyone that get_maintainers --git pulled out (which tends
to generate a lot of false positives), but on the other hand something
like syscon (which is broadly used) or DT bindings (which often affect
subfunctions too) is more likely to be relevant.

About the only hard and fast rule for this sort of thing is that if
someone wants specific people to look at a patch it's usually a good
idea to send the actual patch directly to them with a relevant subject
line.

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[PATCH RESEND] mfd: da9052: fix broken regulator probe

[Johan Hovold]

Fix broken probe of da9052 regulators, which since commit b3f6c73db732
("mfd: da9052-core: Fix platform-device id collision") use a
non-deterministic platform-device id to retrieve static regulator
information. Fortunately, adequate error handling was in place so probe
would simply fail with an error message.

Update the mfd-cell ids to be zero-based and use those to identify the
cells when probing the regulator devices.

Fixes: b3f6c73db732 ("mfd: da9052-core: Fix platform-device id collision")
Cc: stable <stable@vger.kernel.org>	# v3.19
Signed-off-by: Johan Hovold <johan@kernel.org>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
---

Resending per Lee's request to get an ack from Mark Brown.

Johan


 drivers/mfd/da9052-core.c            | 8 ++++----
 drivers/regulator/da9052-regulator.c | 5 +++--
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/drivers/mfd/da9052-core.c b/drivers/mfd/da9052-core.c
index ae498b53ee40..46e3840c7a37 100644
--- a/drivers/mfd/da9052-core.c
+++ b/drivers/mfd/da9052-core.c
@@ -433,6 +433,10 @@ EXPORT_SYMBOL_GPL(da9052_adc_read_temp);
 static const struct mfd_cell da9052_subdev_info[] = {
 	{
 		.name = "da9052-regulator",
+		.id = 0,
+	},
+	{
+		.name = "da9052-regulator",
 		.id = 1,
 	},
 	{
@@ -484,10 +488,6 @@ static const struct mfd_cell da9052_subdev_info[] = {
 		.id = 13,
 	},
 	{
-		.name = "da9052-regulator",
-		.id = 14,
-	},
-	{
 		.name = "da9052-onkey",
 	},
 	{
diff --git a/drivers/regulator/da9052-regulator.c b/drivers/regulator/da9052-regulator.c
index 8a4df7a1f2ee..e628d4c2f2ae 100644
--- a/drivers/regulator/da9052-regulator.c
+++ b/drivers/regulator/da9052-regulator.c
@@ -394,6 +394,7 @@ static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
 
 static int da9052_regulator_probe(struct platform_device *pdev)
 {
+	const struct mfd_cell *cell = mfd_get_cell(pdev);
 	struct regulator_config config = { };
 	struct da9052_regulator *regulator;
 	struct da9052 *da9052;
@@ -409,7 +410,7 @@ static int da9052_regulator_probe(struct platform_device *pdev)
 	regulator->da9052 = da9052;
 
 	regulator->info = find_regulator_info(regulator->da9052->chip_id,
-					      pdev->id);
+					      cell->id);
 	if (regulator->info == NULL) {
 		dev_err(&pdev->dev, "invalid regulator ID specified\n");
 		return -EINVAL;
@@ -419,7 +420,7 @@ static int da9052_regulator_probe(struct platform_device *pdev)
 	config.driver_data = regulator;
 	config.regmap = da9052->regmap;
 	if (pdata && pdata->regulators) {
-		config.init_data = pdata->regulators[pdev->id];
+		config.init_data = pdata->regulators[cell->id];
 	} else {
 #ifdef CONFIG_OF
 		struct device_node *nproot = da9052->dev->of_node;
-- 
2.3.6

Re: [PATCH RESEND] mfd: da9052: fix broken regulator probe

[Mark Brown]

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On Fri, May 15, 2015 at 04:27:40PM +0200, Johan Hovold wrote:
> Fix broken probe of da9052 regulators, which since commit b3f6c73db732
> ("mfd: da9052-core: Fix platform-device id collision") use a
> non-deterministic platform-device id to retrieve static regulator
> information. Fortunately, adequate error handling was in place so probe
> would simply fail with an error message.

Reviewed-by: Mark Brown <broonie@kernel.org>

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Re: [PATCH RESEND] mfd: da9052: fix broken regulator probe

[Lee Jones]

On Fri, 15 May 2015, Johan Hovold wrote:

> Fix broken probe of da9052 regulators, which since commit b3f6c73db732
> ("mfd: da9052-core: Fix platform-device id collision") use a
> non-deterministic platform-device id to retrieve static regulator
> information. Fortunately, adequate error handling was in place so probe
> would simply fail with an error message.
> 
> Update the mfd-cell ids to be zero-based and use those to identify the
> cells when probing the regulator devices.
> 
> Fixes: b3f6c73db732 ("mfd: da9052-core: Fix platform-device id collision")
> Cc: stable <stable@vger.kernel.org>	# v3.19
> Signed-off-by: Johan Hovold <johan@kernel.org>
> Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
> Acked-by: Lee Jones <lee.jones@linaro.org>
> ---
> 
> Resending per Lee's request to get an ack from Mark Brown.
> 
> Johan
> 
> 
>  drivers/mfd/da9052-core.c            | 8 ++++----
>  drivers/regulator/da9052-regulator.c | 5 +++--
>  2 files changed, 7 insertions(+), 6 deletions(-)

Applied, thanks.

> diff --git a/drivers/mfd/da9052-core.c b/drivers/mfd/da9052-core.c
> index ae498b53ee40..46e3840c7a37 100644
> --- a/drivers/mfd/da9052-core.c
> +++ b/drivers/mfd/da9052-core.c
> @@ -433,6 +433,10 @@ EXPORT_SYMBOL_GPL(da9052_adc_read_temp);
>  static const struct mfd_cell da9052_subdev_info[] = {
>  	{
>  		.name = "da9052-regulator",
> +		.id = 0,
> +	},
> +	{
> +		.name = "da9052-regulator",
>  		.id = 1,
>  	},
>  	{
> @@ -484,10 +488,6 @@ static const struct mfd_cell da9052_subdev_info[] = {
>  		.id = 13,
>  	},
>  	{
> -		.name = "da9052-regulator",
> -		.id = 14,
> -	},
> -	{
>  		.name = "da9052-onkey",
>  	},
>  	{
> diff --git a/drivers/regulator/da9052-regulator.c b/drivers/regulator/da9052-regulator.c
> index 8a4df7a1f2ee..e628d4c2f2ae 100644
> --- a/drivers/regulator/da9052-regulator.c
> +++ b/drivers/regulator/da9052-regulator.c
> @@ -394,6 +394,7 @@ static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
>  
>  static int da9052_regulator_probe(struct platform_device *pdev)
>  {
> +	const struct mfd_cell *cell = mfd_get_cell(pdev);
>  	struct regulator_config config = { };
>  	struct da9052_regulator *regulator;
>  	struct da9052 *da9052;
> @@ -409,7 +410,7 @@ static int da9052_regulator_probe(struct platform_device *pdev)
>  	regulator->da9052 = da9052;
>  
>  	regulator->info = find_regulator_info(regulator->da9052->chip_id,
> -					      pdev->id);
> +					      cell->id);
>  	if (regulator->info == NULL) {
>  		dev_err(&pdev->dev, "invalid regulator ID specified\n");
>  		return -EINVAL;
> @@ -419,7 +420,7 @@ static int da9052_regulator_probe(struct platform_device *pdev)
>  	config.driver_data = regulator;
>  	config.regmap = da9052->regmap;
>  	if (pdata && pdata->regulators) {
> -		config.init_data = pdata->regulators[pdev->id];
> +		config.init_data = pdata->regulators[cell->id];
>  	} else {
>  #ifdef CONFIG_OF
>  		struct device_node *nproot = da9052->dev->of_node;

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

Re: [PATCH 1/2] mfd: da9052: fix broken regulator probe

[Lee Jones]

FAO Mark:

> Fix broken probe of da9052 regulators, which since commit b3f6c73db732
> ("mfd: da9052-core: Fix platform-device id collision") use a
> non-deterministic platform-device id to retrieve static regulator
> information. Fortunately, adequate error handling was in place so probe
> would simply fail with an error message.
> 
> Update the mfd-cell ids to be zero-based and use those to identify the
> cells when probing the regulator devices.
> 
> Fixes: b3f6c73db732 ("mfd: da9052-core: Fix platform-device id collision")
> Cc: stable <stable@vger.kernel.org>	# v3.19
> Signed-off-by: Johan Hovold <johan@kernel.org>
> ---
>  drivers/mfd/da9052-core.c            | 8 ++++----
>  drivers/regulator/da9052-regulator.c | 5 +++--
>  2 files changed, 7 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/mfd/da9052-core.c b/drivers/mfd/da9052-core.c
> index ae498b53ee40..46e3840c7a37 100644
> --- a/drivers/mfd/da9052-core.c
> +++ b/drivers/mfd/da9052-core.c
> @@ -433,6 +433,10 @@ EXPORT_SYMBOL_GPL(da9052_adc_read_temp);
>  static const struct mfd_cell da9052_subdev_info[] = {
>  	{
>  		.name = "da9052-regulator",
> +		.id = 0,
> +	},
> +	{
> +		.name = "da9052-regulator",
>  		.id = 1,
>  	},
>  	{
> @@ -484,10 +488,6 @@ static const struct mfd_cell da9052_subdev_info[] = {
>  		.id = 13,
>  	},
>  	{
> -		.name = "da9052-regulator",
> -		.id = 14,
> -	},
> -	{
>  		.name = "da9052-onkey",
>  	},
>  	{
> diff --git a/drivers/regulator/da9052-regulator.c b/drivers/regulator/da9052-regulator.c
> index 8a4df7a1f2ee..e628d4c2f2ae 100644
> --- a/drivers/regulator/da9052-regulator.c
> +++ b/drivers/regulator/da9052-regulator.c
> @@ -394,6 +394,7 @@ static inline struct da9052_regulator_info *find_regulator_info(u8 chip_id,
>  
>  static int da9052_regulator_probe(struct platform_device *pdev)
>  {
> +	const struct mfd_cell *cell = mfd_get_cell(pdev);
>  	struct regulator_config config = { };
>  	struct da9052_regulator *regulator;
>  	struct da9052 *da9052;
> @@ -409,7 +410,7 @@ static int da9052_regulator_probe(struct platform_device *pdev)
>  	regulator->da9052 = da9052;
>  
>  	regulator->info = find_regulator_info(regulator->da9052->chip_id,
> -					      pdev->id);
> +					      cell->id);
>  	if (regulator->info == NULL) {
>  		dev_err(&pdev->dev, "invalid regulator ID specified\n");
>  		return -EINVAL;
> @@ -419,7 +420,7 @@ static int da9052_regulator_probe(struct platform_device *pdev)
>  	config.driver_data = regulator;
>  	config.regmap = da9052->regmap;
>  	if (pdata && pdata->regulators) {
> -		config.init_data = pdata->regulators[pdev->id];
> +		config.init_data = pdata->regulators[cell->id];
>  	} else {
>  #ifdef CONFIG_OF
>  		struct device_node *nproot = da9052->dev->of_node;

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

Re: [PATCH v2 0/5] mfd: Fix platform device ids to avoid probe failure

[Bartlomiej Zolnierkiewicz]

Hi,

On Wednesday, March 25, 2015 12:02:31 PM Johan Hovold wrote:
> On Mon, Mar 23, 2015 at 02:11:50PM +0100, Bartlomiej Zolnierkiewicz wrote:
> > On Monday, March 23, 2015 11:07:18 AM Johan Hovold wrote:
> > > On Fri, Mar 20, 2015 at 08:23:18PM +0100, Bartlomiej Zolnierkiewicz wrote:
> > > 
> > > > Commit 6e3f62f0793e ("mfd: core: Fix platform-device id generation")
> > > > changed the way platform device ids are generated from mfd id base and
> > > > cell ids in mfd_add_device().  Unfortunately the change in question
> > > > breaks mfd drivers which are using mfd_add_devices() with mfd id base
> > > > equal to -1 and non-zero cell ids (used to distinguish cells with
> > > > the same name field).  The result is that mfd core tries to register
> > > > platform devices with the same name which obviously fails and leads
> > > > to mfd device probe failure.
> > > 
> > > First of all, thanks for finding these. I obviously overlooked this
> > > class of drivers when fixing the device-id generation.
> > > 
> > > > Changing mfd_add_devices() mfd id base from -1 to 0 and at the same
> > > > time setting proper cell ids for all cells fixes the issue.
> > > 
> > > This is however not the right fix. Instead you should be using
> > > PLATFORM_DEVID_AUTO and keep the non-zero cell-ids as is, as this will
> > > allow more than one mfd-device to be registered without resorting to
> > > hacks.
> > 
> > Conversion of a driver to use PLATFORM_DEVID_AUTO changes names of
> > all platform devices registered by the driver.  In my patchset I just
> > tried to restore the broken functionality (patch that broke it went
> > in v3.19).  I thought that it was the best solution for v3.19 and
> > v4.0-rc4 (then PLATFORM_DEVID_AUTO conversion can be done sometime
> > later, i.e. in v4.1).
> 
> I think you're right. We should do the conversion to PLATFORM_DEVID_AUTO
> later.
> 
> I'm responding to this mail with two patches for v4.0 fixing the da9052
> driver, which is currently broken although not in the way suggested by
> your v1-series, and the other drivers you identified by doing a partial
> revert of commit 6e3f62f0793e ("mfd: core: Fix platform-device id
> generation").

Both patches look good to me.  Thank you for fixing this.

Best regards,
--
Bartlomiej Zolnierkiewicz
Samsung R&D Institute Poland
Samsung Electronics