diff mbox series

[02/14] mfd: arizona: Add MODULE_SOFTDEP("pre: arizona_ldo1")

Message ID 20201227211232.117801-3-hdegoede@redhat.com (mailing list archive)
State New, archived
Headers show
Series MFD/extcon/ASoC: Add support for Intel Bay Trail boards with WM5102 codec | expand

Commit Message

Hans de Goede Dec. 27, 2020, 9:12 p.m. UTC
The (shared) probing code of the arizona-i2c and arizona-spi modules
takes the following steps during init:

1. Call mfd_add_devices() for a set of early child-devices, this
includes the arizona_ldo1 device which provides one of the
core-regulators.

2. Bulk enable the core-regulators.

3. Read the device id.

4. Call mfd_add_devices() for the other child-devices.

This sequence depends on 1. leading to not only the child-device
being created, but also the driver for the child-device binding
to it and registering its regulator.

This requires the arizona_ldo1 driver to be loaded before the
shared probing code runs. Add a doftdep for this to both modules to
ensure that this requirement is met.

Note this mirrors the existing MODULE_SOFTDEP("pre: wm8994_regulator")
in the wm8994 code, which has a similar init sequence.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/mfd/arizona-i2c.c | 1 +
 drivers/mfd/arizona-spi.c | 1 +
 2 files changed, 2 insertions(+)

Comments

Charles Keepax Dec. 29, 2020, 11:40 a.m. UTC | #1
On Sun, Dec 27, 2020 at 10:12:20PM +0100, Hans de Goede wrote:
> The (shared) probing code of the arizona-i2c and arizona-spi modules
> takes the following steps during init:
> 
> 1. Call mfd_add_devices() for a set of early child-devices, this
> includes the arizona_ldo1 device which provides one of the
> core-regulators.
> 
> 2. Bulk enable the core-regulators.
> 
> 3. Read the device id.
> 
> 4. Call mfd_add_devices() for the other child-devices.
> 
> This sequence depends on 1. leading to not only the child-device
> being created, but also the driver for the child-device binding
> to it and registering its regulator.
> 
> This requires the arizona_ldo1 driver to be loaded before the
> shared probing code runs. Add a doftdep for this to both modules to
> ensure that this requirement is met.
> 
> Note this mirrors the existing MODULE_SOFTDEP("pre: wm8994_regulator")
> in the wm8994 code, which has a similar init sequence.
> 
> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
> ---

Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>

Thanks,
Charles
diff mbox series

Patch

diff --git a/drivers/mfd/arizona-i2c.c b/drivers/mfd/arizona-i2c.c
index 4b58e3ad6eb6..2a4a3a164d0a 100644
--- a/drivers/mfd/arizona-i2c.c
+++ b/drivers/mfd/arizona-i2c.c
@@ -115,6 +115,7 @@  static struct i2c_driver arizona_i2c_driver = {
 
 module_i2c_driver(arizona_i2c_driver);
 
+MODULE_SOFTDEP("pre: arizona_ldo1");
 MODULE_DESCRIPTION("Arizona I2C bus interface");
 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 MODULE_LICENSE("GPL");
diff --git a/drivers/mfd/arizona-spi.c b/drivers/mfd/arizona-spi.c
index 2633e147b76c..704f214d2614 100644
--- a/drivers/mfd/arizona-spi.c
+++ b/drivers/mfd/arizona-spi.c
@@ -110,6 +110,7 @@  static struct spi_driver arizona_spi_driver = {
 
 module_spi_driver(arizona_spi_driver);
 
+MODULE_SOFTDEP("pre: arizona_ldo1");
 MODULE_DESCRIPTION("Arizona SPI bus interface");
 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
 MODULE_LICENSE("GPL");