[PATCH v2 02/12] usb: typec: add API to get sink and source config

[Li Jun <jun.li@nxp.com>]

This patch add 2 APIs to get sink and source power config from firmware
description.

Signed-off-by: Li Jun <jun.li@nxp.com>
---
 drivers/usb/typec/tcpm.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 include/linux/usb/tcpm.h |  2 ++
 2 files changed, 45 insertions(+)

diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c
index f4d563e..409f1d0 100644
--- a/drivers/usb/typec/tcpm.c
+++ b/drivers/usb/typec/tcpm.c
@@ -12,6 +12,7 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
+#include <linux/of.h>
 #include <linux/proc_fs.h>
 #include <linux/sched/clock.h>
 #include <linux/seq_file.h>
@@ -3589,6 +3590,48 @@ static int tcpm_copy_vdos(u32 *dest_vdo, const u32 *src_vdo,
 	return nr_vdo;
 }
 
+int tcpm_of_get_src_config(struct device_node *np, struct tcpc_config *tcfg)
+{
+	int ret;
+
+	ret = of_property_read_variable_u32_array(np, "src-pdos",
+				tcfg->src_pdo, 1, PDO_MAX_OBJECTS);
+	if (ret > 0)
+		tcfg->nr_src_pdo = ret;
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(tcpm_of_get_pdos);
+
+int tcpm_of_get_snk_config(struct device_node *np, struct tcpc_config *tcfg)
+{
+	int ret;
+
+	ret = of_property_read_variable_u32_array(np, "snk-pdos",
+				tcfg->snk_pdo, 1, PDO_MAX_OBJECTS);
+	if (ret > 0)
+		tcfg->nr_snk_pdo = ret;
+	else
+		return ret;
+
+	ret = of_property_read_u32(np, "max-snk-microvolt", &tcfg->max_snk_mv);
+	if (ret)
+		return ret;
+
+	ret = of_property_read_u32(np, "max-snk-microamp", &tcfg->max_snk_ma);
+	if (ret)
+		return ret;
+
+	ret = of_property_read_u32(np, "max-snk-microwatt-hours",
+				   &tcfg->max_snk_mw);
+	if (ret)
+		return ret;
+
+	return of_property_read_u32(np, "op-snk-microwatt-hours",
+				    &tcfg->operating_snk_mw);
+}
+EXPORT_SYMBOL_GPL(tcpm_of_get_pdos);
+
 int tcpm_update_source_capabilities(struct tcpm_port *port, const u32 *pdo,
 				    unsigned int nr_pdo)
 {
diff --git a/include/linux/usb/tcpm.h b/include/linux/usb/tcpm.h
index ca1c0b5..962eff1 100644
--- a/include/linux/usb/tcpm.h
+++ b/include/linux/usb/tcpm.h
@@ -191,6 +191,8 @@ int tcpm_update_sink_capabilities(struct tcpm_port *port, const u32 *pdo,
 				  unsigned int max_snk_ma,
 				  unsigned int max_snk_mw,
 				  unsigned int operating_snk_mw);
+int tcpm_of_get_src_config(struct device_node *np, struct tcpc_config *tcfg);
+int tcpm_of_get_snk_config(struct device_node *np, struct tcpc_config *tcfg);
 
 void tcpm_vbus_change(struct tcpm_port *port);
 void tcpm_cc_change(struct tcpm_port *port);
-- 
2.7.4