diff options
Diffstat (limited to 'drivers/soc/qcom/smp2p.c')
| -rw-r--r-- | drivers/soc/qcom/smp2p.c | 55 |
1 files changed, 41 insertions, 14 deletions
diff --git a/drivers/soc/qcom/smp2p.c b/drivers/soc/qcom/smp2p.c index f51fb2ea7200..c22503cd1edf 100644 --- a/drivers/soc/qcom/smp2p.c +++ b/drivers/soc/qcom/smp2p.c @@ -18,6 +18,7 @@ #include <linux/of.h> #include <linux/irq.h> #include <linux/irqdomain.h> +#include <linux/mailbox_client.h> #include <linux/mfd/syscon.h> #include <linux/module.h> #include <linux/platform_device.h> @@ -126,6 +127,8 @@ struct smp2p_entry { * @ipc_regmap: regmap for the outbound ipc * @ipc_offset: offset within the regmap * @ipc_bit: bit in regmap@offset to kick to signal remote processor + * @mbox_client: mailbox client handle + * @mbox_chan: apcs ipc mailbox channel handle * @inbound: list of inbound entries * @outbound: list of outbound entries */ @@ -146,6 +149,9 @@ struct qcom_smp2p { int ipc_offset; int ipc_bit; + struct mbox_client mbox_client; + struct mbox_chan *mbox_chan; + struct list_head inbound; struct list_head outbound; }; @@ -154,7 +160,13 @@ static void qcom_smp2p_kick(struct qcom_smp2p *smp2p) { /* Make sure any updated data is written before the kick */ wmb(); - regmap_write(smp2p->ipc_regmap, smp2p->ipc_offset, BIT(smp2p->ipc_bit)); + + if (smp2p->mbox_chan) { + mbox_send_message(smp2p->mbox_chan, NULL); + mbox_client_txdone(smp2p->mbox_chan, 0); + } else { + regmap_write(smp2p->ipc_regmap, smp2p->ipc_offset, BIT(smp2p->ipc_bit)); + } } /** @@ -453,10 +465,6 @@ static int qcom_smp2p_probe(struct platform_device *pdev) platform_set_drvdata(pdev, smp2p); - ret = smp2p_parse_ipc(smp2p); - if (ret) - return ret; - key = "qcom,smem"; ret = of_property_read_u32_array(pdev->dev.of_node, key, smp2p->smem_items, 2); @@ -465,17 +473,13 @@ static int qcom_smp2p_probe(struct platform_device *pdev) key = "qcom,local-pid"; ret = of_property_read_u32(pdev->dev.of_node, key, &smp2p->local_pid); - if (ret < 0) { - dev_err(&pdev->dev, "failed to read %s\n", key); - return -EINVAL; - } + if (ret) + goto report_read_failure; key = "qcom,remote-pid"; ret = of_property_read_u32(pdev->dev.of_node, key, &smp2p->remote_pid); - if (ret < 0) { - dev_err(&pdev->dev, "failed to read %s\n", key); - return -EINVAL; - } + if (ret) + goto report_read_failure; irq = platform_get_irq(pdev, 0); if (irq < 0) { @@ -483,9 +487,23 @@ static int qcom_smp2p_probe(struct platform_device *pdev) return irq; } + smp2p->mbox_client.dev = &pdev->dev; + smp2p->mbox_client.knows_txdone = true; + smp2p->mbox_chan = mbox_request_channel(&smp2p->mbox_client, 0); + if (IS_ERR(smp2p->mbox_chan)) { + if (PTR_ERR(smp2p->mbox_chan) != -ENODEV) + return PTR_ERR(smp2p->mbox_chan); + + smp2p->mbox_chan = NULL; + + ret = smp2p_parse_ipc(smp2p); + if (ret) + return ret; + } + ret = qcom_smp2p_alloc_outbound_item(smp2p); if (ret < 0) - return ret; + goto release_mbox; for_each_available_child_of_node(pdev->dev.of_node, node) { entry = devm_kzalloc(&pdev->dev, sizeof(*entry), GFP_KERNEL); @@ -540,7 +558,14 @@ unwind_interfaces: smp2p->out->valid_entries = 0; +release_mbox: + mbox_free_channel(smp2p->mbox_chan); + return ret; + +report_read_failure: + dev_err(&pdev->dev, "failed to read %s\n", key); + return -EINVAL; } static int qcom_smp2p_remove(struct platform_device *pdev) @@ -554,6 +579,8 @@ static int qcom_smp2p_remove(struct platform_device *pdev) list_for_each_entry(entry, &smp2p->outbound, node) qcom_smem_state_unregister(entry->state); + mbox_free_channel(smp2p->mbox_chan); + smp2p->out->valid_entries = 0; return 0; |