[PATCH 3/3] media: i2c: ak7375: Add support for ak7345

Vincent Knecht
2023-11-01T10:23:49Z

Add support for ak7345 VCM, which has 9 bits position values,
longer power-up delay, and no known standby register setting.
Might be compatible as-is with ak7348.

Tested on msm8916-alcatel-idol347 phone.

Signed-off-by: Vincent Knecht <vincent.knecht@mailoo.org>
---
drivers/media/i2c/ak7375.c | 26 ++++++++++++++++++++++----
1 file changed, 22 insertions(+), 4 deletions(-)

diff --git a/drivers/media/i2c/ak7375.c b/drivers/media/i2c/ak7375.c
index 3a14eff41531..9a2432cea3ff 100644
--- a/drivers/media/i2c/ak7375.c
+++ b/drivers/media/i2c/ak7375.c
@@ -16,6 +16,7 @@ struct ak73xx_chipdef {
u8 shift_pos;
u8 mode_active;
u8 mode_standby;
+ bool has_standby; /* Some chips may not have standby mode */
u16 focus_pos_max;
/*
* This sets the minimum granularity for the focus positions.
@@ -37,12 +38,26 @@ struct ak73xx_chipdef {
u16 power_delay_us;
};

+static const struct ak73xx_chipdef ak7345_cdef = {
+ .reg_position = 0x0,
+ .reg_cont = 0x2,
+ .shift_pos = 7, /* 9 bits position values, need to << 7 */
+ .mode_active = 0x0,
+ .has_standby = false,
+ .focus_pos_max = 511,
+ .focus_steps = 1,
+ .ctrl_steps = 16,
+ .ctrl_delay_us = 1000,
+ .power_delay_us = 20000,
+};
+
static const struct ak73xx_chipdef ak7375_cdef = {
.reg_position = 0x0,
.reg_cont = 0x2,
.shift_pos = 4, /* 12 bits position values, need to << 4 */
.mode_active = 0x0,
.mode_standby = 0x40,
+ .has_standby = true,
.focus_pos_max = 4095,
.focus_steps = 1,
.ctrl_steps = 64,
@@ -249,10 +264,12 @@ static int __maybe_unused ak7375_vcm_suspend(struct device *dev)
usleep_range(cdef->ctrl_delay_us, cdef->ctrl_delay_us + 10);
}

- ret = ak7375_i2c_write(ak7375_dev, cdef->reg_cont,
- cdef->mode_standby, 1);
- if (ret)
- dev_err(dev, "%s I2C failure: %d\n", __func__, ret);
+ if (cdef->has_standby) {
+ ret = ak7375_i2c_write(ak7375_dev, cdef->reg_cont,
+ cdef->mode_standby, 1);
+ if (ret)
+ dev_err(dev, "%s I2C failure: %d\n", __func__, ret);
+ }

ret = regulator_bulk_disable(ARRAY_SIZE(ak7375_supply_names),
ak7375_dev->supplies);
@@ -312,6 +329,7 @@ static int __maybe_unused ak7375_vcm_resume(struct device *dev)
}

static const struct of_device_id ak7375_of_table[] = {
+ { .compatible = "asahi-kasei,ak7345", .data = &ak7345_cdef, },
{ .compatible = "asahi-kasei,ak7375", .data = &ak7375_cdef, },
{ /* sentinel */ }
};
--
2.41.0