[PATCH 1/2] media: i2c: ak7375: Add support for the AK7377

[Jan-Michael Brummer <jan.brummer@tabos.org>]

The AK7377 drives the focus actuator of the main camera on the Fairphone
5.  It uses the same register layout as the AK7375: a 12 bit position in
registers 0x00/0x01 shifted left by four, and standby control in 0x02.
Confirmed on hardware by driving the lens across its range.

Signed-off-by: Jan-Michael Brummer <jan.brummer@tabos.org>
---
 drivers/media/i2c/ak7375.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/drivers/media/i2c/ak7375.c b/drivers/media/i2c/ak7375.c
index 9a2432c..4f311c4 100644
--- a/drivers/media/i2c/ak7375.c
+++ b/drivers/media/i2c/ak7375.c
@@ -65,6 +65,25 @@ static const struct ak73xx_chipdef ak7375_cdef = {
 	.power_delay_us	= 10000,
 };
 
+/*
+ * The AK7377 is register compatible with the AK7375: 12 bit position in
+ * registers 0x00/0x01, standby via 0x02.  Verified on the Fairphone 5,
+ * where it drives the focus of the IMX800 main camera.
+ */
+static const struct ak73xx_chipdef ak7377_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,
+	.ctrl_delay_us	= 1000,
+	.power_delay_us	= 10000,
+};
+
 static const char * const ak7375_supply_names[] = {
 	"vdd",
 	"vio",
@@ -331,6 +350,7 @@ 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, },
+	{ .compatible = "asahi-kasei,ak7377", .data = &ak7377_cdef, },
 	{ /* sentinel */ }
 };
 MODULE_DEVICE_TABLE(of, ak7375_of_table);
@@ -353,5 +373,5 @@ module_i2c_driver(ak7375_i2c_driver);
 
 MODULE_AUTHOR("Tianshu Qiu <tian.shu.qiu@intel.com>");
 MODULE_AUTHOR("Bingbu Cao <bingbu.cao@intel.com>");
-MODULE_DESCRIPTION("AK7375 VCM driver");
+MODULE_DESCRIPTION("AK7375/AK7377 VCM driver");
 MODULE_LICENSE("GPL v2");