[PATCH v5 1/5] firmware: tegra: bpmp: Move channel initialization to helper

[Aniruddha Rao <anrao@nvidia.com>]

Move BPMP channel allocation and initialization into a helper.

This keeps the probe function focused on sequencing.

It also lets later patches decide whether mailbox/IVC setup is needed.

No functional change is intended.

Signed-off-by: Aniruddha Rao <anrao@nvidia.com>
---
Changes since v4:
- No change.

Changes since v3:
- No change.

Changes since v2:
- No change.

Changes since v1:
- Keep OF resource initialization in tegra_bpmp_probe().
- Move only BPMP channel allocation and initialization into a helper.

 drivers/firmware/tegra/bpmp.c | 44 +++++++++++++++++++++--------------
 1 file changed, 27 insertions(+), 17 deletions(-)

diff --git a/drivers/firmware/tegra/bpmp.c b/drivers/firmware/tegra/bpmp.c
index 753472b53bd8..0eb99b1c5068 100644
--- a/drivers/firmware/tegra/bpmp.c
+++ b/drivers/firmware/tegra/bpmp.c
@@ -733,19 +733,9 @@ void tegra_bpmp_handle_rx(struct tegra_bpmp *bpmp)
 	spin_unlock(&bpmp->lock);
 }
 
-static int tegra_bpmp_probe(struct platform_device *pdev)
+static int tegra_bpmp_init_channels(struct tegra_bpmp *bpmp)
 {
-	struct tegra_bpmp *bpmp;
-	char tag[TAG_SZ];
 	size_t size;
-	int err;
-
-	bpmp = devm_kzalloc(&pdev->dev, sizeof(*bpmp), GFP_KERNEL);
-	if (!bpmp)
-		return -ENOMEM;
-
-	bpmp->soc = of_device_get_match_data(&pdev->dev);
-	bpmp->dev = &pdev->dev;
 
 	INIT_LIST_HEAD(&bpmp->mrqs);
 	spin_lock_init(&bpmp->lock);
@@ -755,31 +745,51 @@ static int tegra_bpmp_probe(struct platform_device *pdev)
 
 	size = BITS_TO_LONGS(bpmp->threaded.count) * sizeof(long);
 
-	bpmp->threaded.allocated = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
+	bpmp->threaded.allocated = devm_kzalloc(bpmp->dev, size, GFP_KERNEL);
 	if (!bpmp->threaded.allocated)
 		return -ENOMEM;
 
-	bpmp->threaded.busy = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
+	bpmp->threaded.busy = devm_kzalloc(bpmp->dev, size, GFP_KERNEL);
 	if (!bpmp->threaded.busy)
 		return -ENOMEM;
 
 	spin_lock_init(&bpmp->atomic_tx_lock);
-	bpmp->tx_channel = devm_kzalloc(&pdev->dev, sizeof(*bpmp->tx_channel),
+	bpmp->tx_channel = devm_kzalloc(bpmp->dev, sizeof(*bpmp->tx_channel),
 					GFP_KERNEL);
 	if (!bpmp->tx_channel)
 		return -ENOMEM;
 
-	bpmp->rx_channel = devm_kzalloc(&pdev->dev, sizeof(*bpmp->rx_channel),
-	                                GFP_KERNEL);
+	bpmp->rx_channel = devm_kzalloc(bpmp->dev, sizeof(*bpmp->rx_channel),
+					GFP_KERNEL);
 	if (!bpmp->rx_channel)
 		return -ENOMEM;
 
-	bpmp->threaded_channels = devm_kcalloc(&pdev->dev, bpmp->threaded.count,
+	bpmp->threaded_channels = devm_kcalloc(bpmp->dev, bpmp->threaded.count,
 					       sizeof(*bpmp->threaded_channels),
 					       GFP_KERNEL);
 	if (!bpmp->threaded_channels)
 		return -ENOMEM;
 
+	return 0;
+}
+
+static int tegra_bpmp_probe(struct platform_device *pdev)
+{
+	struct tegra_bpmp *bpmp;
+	char tag[TAG_SZ];
+	int err;
+
+	bpmp = devm_kzalloc(&pdev->dev, sizeof(*bpmp), GFP_KERNEL);
+	if (!bpmp)
+		return -ENOMEM;
+
+	bpmp->soc = of_device_get_match_data(&pdev->dev);
+	bpmp->dev = &pdev->dev;
+
+	err = tegra_bpmp_init_channels(bpmp);
+	if (err < 0)
+		return err;
+
 	platform_set_drvdata(pdev, bpmp);
 
 	err = bpmp->soc->ops->init(bpmp);
-- 
2.43.0