[v12,03/10] usb: typec: tcpm: Refactor logic for new-source-frs-typec-current

Commit Message

Badhri Jagan Sridharan Oct. 29, 2020, 6:31 a.m. UTC

New source's current capability is now defined as string based
device tree property through new-source-frs-typec-current.
Refactor tcpm code to parse new-source-frs-typec-current and
infer local port's new source current capability during frs.

Signed-off-by: Badhri Jagan Sridharan <[e-mail]>
---
v9 is the first version of this patch in this series to rebase
TCPM code to read new source frs current from
new-source-frs-typec-current.

Changes since v10:
- Moving back to u32 for new-source-frs-typec-current.

Changes since v11:
- None
---
 drivers/usb/typec/tcpm/tcpm.c | 18 ++++++++++--------
 1 file changed, 10 insertions(+), 8 deletions(-)

Patch

diff --git a/drivers/usb/typec/tcpm/tcpm.c b/drivers/usb/typec/tcpm/tcpm.c
index 55535c4f66bf..561480b67bce 100644
--- a/drivers/usb/typec/tcpm/tcpm.c
+++ b/drivers/usb/typec/tcpm/tcpm.c
@@ -363,8 +363,8 @@  struct tcpm_port {
 	/* port belongs to a self powered device */
 	bool self_powered;
 
-	/* FRS */
-	enum frs_typec_current frs_current;
+	/* Sink FRS */
+	enum frs_typec_current new_source_frs_current;
 
 	/* Sink caps have been queried */
 	bool sink_cap_done;
@@ -1713,7 +1713,7 @@  static void tcpm_pd_data_request(struct tcpm_port *port,
 	unsigned int cnt = pd_header_cnt_le(msg->header);
 	unsigned int rev = pd_header_rev_le(msg->header);
 	unsigned int i;
-	enum frs_typec_current frs_current;
+	enum frs_typec_current partner_frs_current;
 	bool frs_enable;
 	int ret;
 
@@ -1786,12 +1786,13 @@  static void tcpm_pd_data_request(struct tcpm_port *port,
 		for (i = 0; i < cnt; i++)
 			port->sink_caps[i] = le32_to_cpu(msg->payload[i]);
 
-		frs_current = (port->sink_caps[0] & PDO_FIXED_FRS_CURR_MASK) >>
+		partner_frs_current = (port->sink_caps[0] & PDO_FIXED_FRS_CURR_MASK) >>
 			PDO_FIXED_FRS_CURR_SHIFT;
-		frs_enable = frs_current && (frs_current <= port->frs_current);
+		frs_enable = partner_frs_current && (partner_frs_current <=
+						     port->new_source_frs_current);
 		tcpm_log(port,
 			 "Port partner FRS capable partner_frs_current:%u port_frs_current:%u enable:%c",
-			 frs_current, port->frs_current, frs_enable ? 'y' : 'n');
+			 partner_frs_current, port->new_source_frs_current, frs_enable ? 'y' : 'n');
 		if (frs_enable) {
 			ret  = port->tcpc->enable_frs(port->tcpc, true);
 			tcpm_log(port, "Enable FRS %s, ret:%d\n", ret ? "fail" : "success", ret);
@@ -4808,9 +4809,10 @@  static int tcpm_fw_get_caps(struct tcpm_port *port,
 
 	/* FRS can only be supported byb DRP ports */
 	if (port->port_type == TYPEC_PORT_DRP) {
-		ret = fwnode_property_read_u32(fwnode, "frs-typec-current", &frs_current);
+		ret = fwnode_property_read_u32(fwnode, "new-source-frs-typec-current",
+					       &frs_current);
 		if (ret >= 0 && frs_current <= FRS_5V_3A)
-			port->frs_current = frs_current;
+			port->new_source_frs_current = frs_current;
 	}
 
 	return 0;