The TI HD3SS3220 Type-C controller supports configuring its advertised
power operation mode over I2C using the CURRENT_MODE_ADVERTISE field
of the Connection Status Register.
Configure this power mode based on the existing (optional) property
"typec-power-opmode" of /schemas/connector/usb-connector.yaml
Signed-off-by: Oliver Facklam <oliver.facklam@xxxxxxxxxxx>
---
drivers/usb/typec/hd3ss3220.c | 53 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 53 insertions(+)
diff --git a/drivers/usb/typec/hd3ss3220.c b/drivers/usb/typec/hd3ss3220.c
index fb1242e82ffdc64a9a3330f50155bb8f0fe45685..56f74bf70895ca701083bde44a5bbe0b691551e1 100644
--- a/drivers/usb/typec/hd3ss3220.c
+++ b/drivers/usb/typec/hd3ss3220.c
@@ -16,10 +16,17 @@
#include <linux/delay.h>
#include <linux/workqueue.h>
+#define HD3SS3220_REG_CN_STAT 0x08
#define HD3SS3220_REG_CN_STAT_CTRL 0x09
#define HD3SS3220_REG_GEN_CTRL 0x0A
#define HD3SS3220_REG_DEV_REV 0xA0
+/* Register HD3SS3220_REG_CN_STAT */
+#define HD3SS3220_REG_CN_STAT_CURRENT_MODE_MASK (BIT(7) | BIT(6))
+#define HD3SS3220_REG_CN_STAT_CURRENT_MODE_DEFAULT 0x00
+#define HD3SS3220_REG_CN_STAT_CURRENT_MODE_MID BIT(6)
+#define HD3SS3220_REG_CN_STAT_CURRENT_MODE_HIGH BIT(7)
+
/* Register HD3SS3220_REG_CN_STAT_CTRL*/
#define HD3SS3220_REG_CN_STAT_CTRL_ATTACHED_STATE_MASK (BIT(7) | BIT(6))
#define HD3SS3220_REG_CN_STAT_CTRL_AS_DFP BIT(6)
@@ -43,6 +50,31 @@ struct hd3ss3220 {
bool poll;
};
+static int hd3ss3220_set_power_opmode(struct hd3ss3220 *hd3ss3220, int power_opmode)
+{
+ int current_mode;
+
+ switch (power_opmode) {
+ case TYPEC_PWR_MODE_USB:
+ current_mode = HD3SS3220_REG_CN_STAT_CURRENT_MODE_DEFAULT;
+ break;
+ case TYPEC_PWR_MODE_1_5A:
+ current_mode = HD3SS3220_REG_CN_STAT_CURRENT_MODE_MID;
+ break;
+ case TYPEC_PWR_MODE_3_0A:
+ current_mode = HD3SS3220_REG_CN_STAT_CURRENT_MODE_HIGH;
+ break;
+ case TYPEC_PWR_MODE_PD: /* Power delivery not supported */
+ default:
+ dev_err(hd3ss3220->dev, "bad power operation mode: %d\n", power_opmode);
+ return -EINVAL;
+ }
+
+ return regmap_update_bits(hd3ss3220->regmap, HD3SS3220_REG_CN_STAT,
+ HD3SS3220_REG_CN_STAT_CURRENT_MODE_MASK,
+ current_mode);
+}
+
static int hd3ss3220_set_source_pref(struct hd3ss3220 *hd3ss3220, int src_pref)
{
return regmap_update_bits(hd3ss3220->regmap, HD3SS3220_REG_GEN_CTRL,
@@ -162,6 +194,23 @@ static irqreturn_t hd3ss3220_irq_handler(int irq, void *data)
return hd3ss3220_irq(hd3ss3220);
}
+static int hd3ss3220_configure_power_opmode(struct hd3ss3220 *hd3ss3220,
+ struct fwnode_handle *connector)
+{
+ /*
+ * Supported power operation mode can be configured through device tree
+ */
+ const char *cap_str;
+ int ret, power_opmode;
+
+ ret = fwnode_property_read_string(connector, "typec-power-opmode", &cap_str);
+ if (ret)
+ return 0;
+
+ power_opmode = typec_find_pwr_opmode(cap_str);
+ return hd3ss3220_set_power_opmode(hd3ss3220, power_opmode);
+}
+
static const struct regmap_config config = {
.reg_bits = 8,
.val_bits = 8,
@@ -223,6 +272,10 @@ static int hd3ss3220_probe(struct i2c_client *client)
goto err_put_role;
}
+ ret = hd3ss3220_configure_power_opmode(hd3ss3220, connector);
+ if (ret < 0)
+ goto err_unreg_port;
+
hd3ss3220_set_role(hd3ss3220);
ret = regmap_read(hd3ss3220->regmap, HD3SS3220_REG_CN_STAT_CTRL, &data);
if (ret < 0)
--
2.34.1
