On Tue, Mar 13, 2018 at 05:34:31PM +0800, Li Jun wrote:
> This patch add 2 APIs to get sink and source power config from firmware
> description in case the port supports PD.
>
> Signed-off-by: Li Jun <[email protected]>
> ---
> drivers/usb/typec/tcpm.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
> include/linux/usb/tcpm.h | 8 +++++---
> 2 files changed, 52 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/usb/typec/tcpm.c b/drivers/usb/typec/tcpm.c
> index 7500dc0..0bd34c9 100644
> --- a/drivers/usb/typec/tcpm.c
> +++ b/drivers/usb/typec/tcpm.c
> @@ -13,6 +13,7 @@
> #include <linux/module.h>
> #include <linux/mutex.h>
> #include <linux/proc_fs.h>
> +#include <linux/property.h>
> #include <linux/sched/clock.h>
> #include <linux/seq_file.h>
> #include <linux/slab.h>
> @@ -3595,6 +3596,52 @@ static int tcpm_copy_vdos(u32 *dest_vdo, const u32
> *src_vdo,
> return nr_vdo;
> }
>
> +int tcpm_get_src_config(struct fwnode_handle *fwnode, struct tcpc_config
> *tcfg)
> +{
> + int ret;
> +
> + if (!fwnode)
> + return -EINVAL;
> +
> + ret = fwnode_property_read_u32_array(fwnode, "source-pdos",
> + NULL, 0);
> + if (ret <= 0)
> + return -EINVAL;
> +
> + tcfg->nr_src_pdo = min(ret, PDO_MAX_OBJECTS);
> + return fwnode_property_read_u32_array(fwnode, "source-pdos",
> + tcfg->src_pdo, tcfg->nr_src_pdo);
> +}
> +EXPORT_SYMBOL_GPL(tcpm_get_src_config);
> +
> +int tcpm_get_snk_config(struct fwnode_handle *fwnode, struct tcpc_config
> *tcfg)
> +{
> + int ret;
> +
> + if (!fwnode)
> + return -EINVAL;
> +
> + if ((fwnode_property_read_u32(fwnode, "max-sink-microvolt",
> + &tcfg->max_snk_mv) < 0) ||
> + (fwnode_property_read_u32(fwnode, "max-sink-microamp",
> + &tcfg->max_snk_ma) < 0) ||
> + (fwnode_property_read_u32(fwnode, "max-sink-microwatt-hours",
> + &tcfg->max_snk_mw) < 0) ||
> + (fwnode_property_read_u32(fwnode, "op-sink-microwatt-hours",
> + &tcfg->operating_snk_mw) < 0))
> + return -EINVAL;
> +
> + ret = fwnode_property_read_u32_array(fwnode, "sink-pdos",
> + NULL, 0);
> + if (ret <= 0)
> + return -EINVAL;
> +
> + tcfg->nr_snk_pdo = min(ret, PDO_MAX_OBJECTS);
> + return fwnode_property_read_u32_array(fwnode, "sink-pdos",
> + tcfg->snk_pdo, tcfg->nr_snk_pdo);
> +}
> +EXPORT_SYMBOL_GPL(tcpm_get_snk_config);
tcpm_register_port() can check these. No need to involve the tcpc
drivers.
> 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 e2e2db3..5d361f6 100644
> --- a/include/linux/usb/tcpm.h
> +++ b/include/linux/usb/tcpm.h
> @@ -76,10 +76,10 @@ enum tcpm_transmit_type {
> * @alt_modes: List of supported alternate modes
> */
> struct tcpc_config {
> - const u32 *src_pdo;
> + u32 *src_pdo;
> unsigned int nr_src_pdo;
>
> - const u32 *snk_pdo;
> + u32 *snk_pdo;
> unsigned int nr_snk_pdo;
>
> const u32 *snk_vdo;
> @@ -143,7 +143,7 @@ enum tcpc_mux_mode {
> * @mux: Pointer to multiplexer data
> */
> struct tcpc_dev {
> - const struct tcpc_config *config;
> + struct tcpc_config *config;
If you check the properties in tcpm, the above members can continue to
be declared constant for now.
> struct fwnode_handle *fwnode;
>
> int (*init)(struct tcpc_dev *dev);
> @@ -189,5 +189,7 @@ void tcpm_pd_transmit_complete(struct tcpm_port *port,
> enum tcpm_transmit_status status);
> void tcpm_pd_hard_reset(struct tcpm_port *port);
> void tcpm_tcpc_reset(struct tcpm_port *port);
> +int tcpm_get_src_config(struct fwnode_handle *fwnode, struct tcpc_config
> *tcfg);
> +int tcpm_get_snk_config(struct fwnode_handle *fwnode, struct tcpc_config
> *tcfg);
Cheers,
--
heikki
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