From: Charles Keepax <ckeepax@opensource.cirrus.com>
To: lee@kernel.org, broonie@kernel.org, robh@kernel.org, krzk+dt@kernel.org
Cc: conor+dt@kernel.org, lgirdwood@gmail.com,
linux-sound@vger.kernel.org, devicetree@vger.kernel.org,
mfd@lists.linux.dev, linux-kernel@vger.kernel.org,
patches@opensource.cirrus.com
Subject: [PATCH 3/3] mfd: cs42l43: Add support for new cs42l44 variant
Date: Wed, 8 Jul 2026 15:00:39 +0100 [thread overview]
Message-ID: <20260708140039.1993489-4-ckeepax@opensource.cirrus.com> (raw)
In-Reply-To: <20260708140039.1993489-1-ckeepax@opensource.cirrus.com>
The cs42l44 is a cost optimised variant of cs42l43b. Add basic support
for this new device.
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
---
drivers/mfd/cs42l43-i2c.c | 2 ++
drivers/mfd/cs42l43-sdw.c | 1 +
drivers/mfd/cs42l43.c | 18 ++++++++++++------
include/linux/mfd/cs42l43-regs.h | 1 +
4 files changed, 16 insertions(+), 6 deletions(-)
diff --git a/drivers/mfd/cs42l43-i2c.c b/drivers/mfd/cs42l43-i2c.c
index bd9752d2cfc34..1af878c7a20b4 100644
--- a/drivers/mfd/cs42l43-i2c.c
+++ b/drivers/mfd/cs42l43-i2c.c
@@ -59,6 +59,7 @@ static int cs42l43_i2c_probe(struct i2c_client *i2c)
static const struct of_device_id cs42l43_of_match[] = {
{ .compatible = "cirrus,cs42l43", .data = (void *)CS42L43_DEVID_VAL },
{ .compatible = "cirrus,cs42l43b", .data = (void *)CS42L43B_DEVID_VAL },
+ { .compatible = "cirrus,cs42l44", .data = (void *)CS42L43B_DEVID_VAL },
{ }
};
MODULE_DEVICE_TABLE(of, cs42l43_of_match);
@@ -68,6 +69,7 @@ MODULE_DEVICE_TABLE(of, cs42l43_of_match);
static const struct acpi_device_id cs42l43_acpi_match[] = {
{ .id = "CSC4243", .driver_data = CS42L43_DEVID_VAL },
{ .id = "CSC2A3B", .driver_data = CS42L43B_DEVID_VAL },
+ { .id = "CSC4244", .driver_data = CS42L43B_DEVID_VAL },
{ }
};
MODULE_DEVICE_TABLE(acpi, cs42l43_acpi_match);
diff --git a/drivers/mfd/cs42l43-sdw.c b/drivers/mfd/cs42l43-sdw.c
index 6ccfdcd3f6698..81dd19df53685 100644
--- a/drivers/mfd/cs42l43-sdw.c
+++ b/drivers/mfd/cs42l43-sdw.c
@@ -184,6 +184,7 @@ static int cs42l43_sdw_probe(struct sdw_slave *sdw, const struct sdw_device_id *
static const struct sdw_device_id cs42l43_sdw_id[] = {
SDW_SLAVE_ENTRY(0x01FA, 0x4243, (void *)CS42L43_DEVID_VAL),
SDW_SLAVE_ENTRY(0x01FA, 0x2A3B, (void *)CS42L43B_DEVID_VAL),
+ SDW_SLAVE_ENTRY(0x01FA, 0x4244, (void *)CS42L43B_DEVID_VAL),
{ }
};
MODULE_DEVICE_TABLE(sdw, cs42l43_sdw_id);
diff --git a/drivers/mfd/cs42l43.c b/drivers/mfd/cs42l43.c
index 33479ddd539a6..d6027fa4de705 100644
--- a/drivers/mfd/cs42l43.c
+++ b/drivers/mfd/cs42l43.c
@@ -959,6 +959,7 @@ static void cs42l43_boot_work(struct work_struct *work)
{
struct cs42l43 *cs42l43 = container_of(work, struct cs42l43, boot_work);
unsigned int devid, revid, otp;
+ bool valid_id;
int ret;
ret = cs42l43_wait_for_attach(cs42l43);
@@ -973,19 +974,24 @@ static void cs42l43_boot_work(struct work_struct *work)
switch (devid) {
case CS42L43_DEVID_VAL:
+ valid_id = (cs42l43->variant_id == CS42L43_DEVID_VAL);
+ break;
case CS42L43B_DEVID_VAL:
- if (devid != cs42l43->variant_id) {
- dev_err(cs42l43->dev,
- "Device ID (0x%06x) does not match variant ID (0x%06lx)\n",
- devid, cs42l43->variant_id);
- goto err;
- }
+ case CS42L44_DEVID_VAL:
+ valid_id = (cs42l43->variant_id == CS42L43B_DEVID_VAL);
break;
default:
dev_err(cs42l43->dev, "Unrecognised devid: 0x%06x\n", devid);
goto err;
}
+ if (!valid_id) {
+ dev_err(cs42l43->dev,
+ "Device ID (0x%06x) does not match variant ID (0x%06lx)\n",
+ devid, cs42l43->variant_id);
+ goto err;
+ }
+
ret = regmap_read(cs42l43->regmap, CS42L43_REVID, &revid);
if (ret) {
dev_err(cs42l43->dev, "Failed to read rev: %d\n", ret);
diff --git a/include/linux/mfd/cs42l43-regs.h b/include/linux/mfd/cs42l43-regs.h
index 68831f113589d..4c00ceae8b461 100644
--- a/include/linux/mfd/cs42l43-regs.h
+++ b/include/linux/mfd/cs42l43-regs.h
@@ -1183,6 +1183,7 @@
/* CS42L43B VARIANT REGISTERS */
#define CS42L43B_DEVID_VAL 0x0042A43B
+#define CS42L44_DEVID_VAL 0x00042A44
#define CS42L43B_DECIM_VOL_CTRL_CH1_CH2 0x00008280
#define CS42L43B_DECIM_VOL_CTRL_CH3_CH4 0x00008284
--
2.47.3
prev parent reply other threads:[~2026-07-08 14:00 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-08 14:00 [PATCH 0/3] Add support for cs42l44 Charles Keepax
2026-07-08 14:00 ` [PATCH 1/3] ASoC: dt-bindings: cirrus,cs42l43: Add CS42L44 variant Charles Keepax
2026-07-08 14:00 ` [PATCH 2/3] mfd: cs42l43: Tidy up formatting on sdw_device_id table Charles Keepax
2026-07-08 14:00 ` Charles Keepax [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260708140039.1993489-4-ckeepax@opensource.cirrus.com \
--to=ckeepax@opensource.cirrus.com \
--cc=broonie@kernel.org \
--cc=conor+dt@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=krzk+dt@kernel.org \
--cc=lee@kernel.org \
--cc=lgirdwood@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-sound@vger.kernel.org \
--cc=mfd@lists.linux.dev \
--cc=patches@opensource.cirrus.com \
--cc=robh@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox