[PATCH] mfd: cs42l43: Prepare support for updated bios patch

From: Maciej Strozek
Date: Wed Oct 23 2024 - 06:07:18 EST


Newer bios patch firmware versions now require use of the shadow register
interface, which was previously only required by the full firmware, update
the check accordingly.

Signed-off-by: Maciej Strozek <mstrozek@xxxxxxxxxxxxxxxxxxxxx>
---
drivers/mfd/cs42l43.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/mfd/cs42l43.c b/drivers/mfd/cs42l43.c
index 3b4efb294471..35a633457a93 100644
--- a/drivers/mfd/cs42l43.c
+++ b/drivers/mfd/cs42l43.c
@@ -48,6 +48,7 @@

#define CS42L43_MCU_SUPPORTED_REV 0x2105
#define CS42L43_MCU_SHADOW_REGS_REQUIRED_REV 0x2200
+#define CS42L43_BIOS_SHADOW_REGS_REQUIRED_REV 0x1002
#define CS42L43_MCU_SUPPORTED_BIOS_REV 0x0001

#define CS42L43_VDDP_DELAY_US 50
@@ -773,7 +774,8 @@ static int cs42l43_mcu_update_step(struct cs42l43 *cs42l43)
* Later versions of the firmwware require the driver to access some
* features through a set of shadow registers.
*/
- shadow = mcu_rev >= CS42L43_MCU_SHADOW_REGS_REQUIRED_REV;
+ shadow = (mcu_rev >= CS42L43_MCU_SHADOW_REGS_REQUIRED_REV) ||
+ (bios_rev >= CS42L43_BIOS_SHADOW_REGS_REQUIRED_REV);

ret = regmap_read(cs42l43->regmap, CS42L43_BOOT_CONTROL, &secure_cfg);
if (ret) {
--
2.34.1