diff options
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/arm_scmi/driver.c | 41 |
1 files changed, 23 insertions, 18 deletions
diff --git a/drivers/firmware/arm_scmi/driver.c b/drivers/firmware/arm_scmi/driver.c index 8bd350b1e108..08787aed5519 100644 --- a/drivers/firmware/arm_scmi/driver.c +++ b/drivers/firmware/arm_scmi/driver.c @@ -112,7 +112,7 @@ struct scmi_chan_info { * @version: SCMI revision information containing protocol version, * implementation version and (sub-)vendor identification. * @minfo: Message info - * @tx_idr: IDR object to map protocol id to channel info pointer + * @tx_idr: IDR object to map protocol id to Tx channel info pointer * @protocols_imp: List of protocols implemented, currently maximum of * MAX_PROTOCOLS_IMP elements allocated by the base protocol * @node: List head @@ -640,22 +640,27 @@ static int scmi_xfer_info_init(struct scmi_info *sinfo) return 0; } -static int scmi_mailbox_check(struct device_node *np) +static int scmi_mailbox_check(struct device_node *np, int idx) { - return of_parse_phandle_with_args(np, "mboxes", "#mbox-cells", 0, NULL); + return of_parse_phandle_with_args(np, "mboxes", "#mbox-cells", + idx, NULL); } -static inline int -scmi_mbox_chan_setup(struct scmi_info *info, struct device *dev, int prot_id) +static int scmi_mbox_chan_setup(struct scmi_info *info, struct device *dev, + int prot_id, bool tx) { - int ret; + int ret, idx; struct resource res; resource_size_t size; struct device_node *shmem, *np = dev->of_node; struct scmi_chan_info *cinfo; struct mbox_client *cl; + const char *desc = tx ? "Tx" : "Rx"; + + /* Transmit channel is first entry i.e. index 0 */ + idx = tx ? 0 : 1; - if (scmi_mailbox_check(np)) { + if (scmi_mailbox_check(np, idx)) { cinfo = idr_find(&info->tx_idr, SCMI_PROTOCOL_BASE); goto idr_alloc; } @@ -669,31 +674,31 @@ scmi_mbox_chan_setup(struct scmi_info *info, struct device *dev, int prot_id) cl = &cinfo->cl; cl->dev = dev; cl->rx_callback = scmi_rx_callback; - cl->tx_prepare = scmi_tx_prepare; + cl->tx_prepare = tx ? scmi_tx_prepare : NULL; cl->tx_block = false; - cl->knows_txdone = true; + cl->knows_txdone = tx; - shmem = of_parse_phandle(np, "shmem", 0); + shmem = of_parse_phandle(np, "shmem", idx); ret = of_address_to_resource(shmem, 0, &res); of_node_put(shmem); if (ret) { - dev_err(dev, "failed to get SCMI Tx payload mem resource\n"); + dev_err(dev, "failed to get SCMI %s payload memory\n", desc); return ret; } size = resource_size(&res); cinfo->payload = devm_ioremap(info->dev, res.start, size); if (!cinfo->payload) { - dev_err(dev, "failed to ioremap SCMI Tx payload\n"); + dev_err(dev, "failed to ioremap SCMI %s payload\n", desc); return -EADDRNOTAVAIL; } - /* Transmit channel is first entry i.e. index 0 */ - cinfo->chan = mbox_request_channel(cl, 0); + cinfo->chan = mbox_request_channel(cl, idx); if (IS_ERR(cinfo->chan)) { ret = PTR_ERR(cinfo->chan); if (ret != -EPROBE_DEFER) - dev_err(dev, "failed to request SCMI Tx mailbox\n"); + dev_err(dev, "failed to request SCMI %s mailbox\n", + desc); return ret; } @@ -721,7 +726,7 @@ scmi_create_protocol_device(struct device_node *np, struct scmi_info *info, return; } - if (scmi_mbox_chan_setup(info, &sdev->dev, prot_id)) { + if (scmi_mbox_chan_setup(info, &sdev->dev, prot_id, true)) { dev_err(&sdev->dev, "failed to setup transport\n"); scmi_device_destroy(sdev); return; @@ -741,7 +746,7 @@ static int scmi_probe(struct platform_device *pdev) struct device_node *child, *np = dev->of_node; /* Only mailbox method supported, check for the presence of one */ - if (scmi_mailbox_check(np)) { + if (scmi_mailbox_check(np, 0)) { dev_err(dev, "no mailbox found in %pOF\n", np); return -EINVAL; } @@ -769,7 +774,7 @@ static int scmi_probe(struct platform_device *pdev) handle->dev = info->dev; handle->version = &info->version; - ret = scmi_mbox_chan_setup(info, dev, SCMI_PROTOCOL_BASE); + ret = scmi_mbox_chan_setup(info, dev, SCMI_PROTOCOL_BASE, true); if (ret) return ret; |