All of lore.kernel.org
 help / color / mirror / Atom feed
From: Adrian Hunter <adrian.hunter@intel.com>
To: alexandre.belloni@bootlin.com
Cc: Frank.Li@nxp.com, Wolfram Sang <wsa+renesas@sang-engineering.com>,
	Aniket <aniketmaurya@google.com>,
	linux-i3c@lists.infradead.org
Subject: [PATCH V2 12/20] i3c: mipi-i3c-hci: Refactor PIO register initialization
Date: Thu,  8 Jan 2026 10:05:50 +0200	[thread overview]
Message-ID: <20260108080558.21767-13-adrian.hunter@intel.com> (raw)
In-Reply-To: <20260108080558.21767-1-adrian.hunter@intel.com>

Move the PIO register setup logic out of hci_pio_init() into a new
helper, __hci_pio_init().  This refactoring prepares for Runtime PM
support by allowing PIO registers to be reinitialized independently
after resume.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
---


Changes in V2:

	Add Frank's Rev'd-by


 drivers/i3c/master/mipi-i3c-hci/pio.c | 45 +++++++++++++++++----------
 1 file changed, 28 insertions(+), 17 deletions(-)

diff --git a/drivers/i3c/master/mipi-i3c-hci/pio.c b/drivers/i3c/master/mipi-i3c-hci/pio.c
index 3d633abf6099..52d9f01d9ca9 100644
--- a/drivers/i3c/master/mipi-i3c-hci/pio.c
+++ b/drivers/i3c/master/mipi-i3c-hci/pio.c
@@ -135,27 +135,14 @@ struct hci_pio_data {
 	u32 enabled_irqs;
 };
 
-static int hci_pio_init(struct i3c_hci *hci)
+static void __hci_pio_init(struct i3c_hci *hci, u32 *size_val_ptr)
 {
-	struct hci_pio_data *pio;
 	u32 val, size_val, rx_thresh, tx_thresh, ibi_val;
-
-	pio = devm_kzalloc(hci->master.dev.parent, sizeof(*pio), GFP_KERNEL);
-	if (!pio)
-		return -ENOMEM;
-
-	hci->io_data = pio;
-	spin_lock_init(&pio->lock);
+	struct hci_pio_data *pio = hci->io_data;
 
 	size_val = pio_reg_read(QUEUE_SIZE);
-	dev_dbg(&hci->master.dev, "CMD/RESP FIFO = %ld entries\n",
-		FIELD_GET(CR_QUEUE_SIZE, size_val));
-	dev_dbg(&hci->master.dev, "IBI FIFO = %ld bytes\n",
-		4 * FIELD_GET(IBI_STATUS_SIZE, size_val));
-	dev_dbg(&hci->master.dev, "RX data FIFO = %d bytes\n",
-		4 * (2 << FIELD_GET(RX_DATA_BUFFER_SIZE, size_val)));
-	dev_dbg(&hci->master.dev, "TX data FIFO = %d bytes\n",
-		4 * (2 << FIELD_GET(TX_DATA_BUFFER_SIZE, size_val)));
+	if (size_val_ptr)
+		*size_val_ptr = size_val;
 
 	/*
 	 * Let's initialize data thresholds to half of the actual FIFO size.
@@ -201,6 +188,30 @@ static int hci_pio_init(struct i3c_hci *hci)
 
 	/* Always accept error interrupts (will be activated on first xfer) */
 	pio->enabled_irqs = STAT_ALL_ERRORS;
+}
+
+static int hci_pio_init(struct i3c_hci *hci)
+{
+	struct hci_pio_data *pio;
+	u32 size_val;
+
+	pio = devm_kzalloc(hci->master.dev.parent, sizeof(*pio), GFP_KERNEL);
+	if (!pio)
+		return -ENOMEM;
+
+	hci->io_data = pio;
+	spin_lock_init(&pio->lock);
+
+	__hci_pio_init(hci, &size_val);
+
+	dev_dbg(&hci->master.dev, "CMD/RESP FIFO = %ld entries\n",
+		FIELD_GET(CR_QUEUE_SIZE, size_val));
+	dev_dbg(&hci->master.dev, "IBI FIFO = %ld bytes\n",
+		4 * FIELD_GET(IBI_STATUS_SIZE, size_val));
+	dev_dbg(&hci->master.dev, "RX data FIFO = %d bytes\n",
+		4 * (2 << FIELD_GET(RX_DATA_BUFFER_SIZE, size_val)));
+	dev_dbg(&hci->master.dev, "TX data FIFO = %d bytes\n",
+		4 * (2 << FIELD_GET(TX_DATA_BUFFER_SIZE, size_val)));
 
 	return 0;
 }
-- 
2.51.0


-- 
linux-i3c mailing list
linux-i3c@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-i3c

  parent reply	other threads:[~2026-01-08  8:06 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-01-08  8:05 [PATCH V2 00/20] i3c: mipi-i3c-hci-pci: Add Runtime PM support Adrian Hunter
2026-01-08  8:05 ` [PATCH V2 01/20] i3c: mipi-i3c-hci: Reset RING_OPERATION1 fields during init Adrian Hunter
2026-01-08  8:05 ` [PATCH V2 02/20] i3c: mipi-i3c-hci: Ensure proper bus clean-up Adrian Hunter
2026-01-08  8:05 ` [PATCH V2 03/20] i3c: master: Update hot-join flag only on success Adrian Hunter
2026-01-08 14:52   ` Frank Li
2026-01-08  8:05 ` [PATCH V2 04/20] i3c: master: Replace WARN_ON() with dev_err() in i3c_dev_free_ibi_locked() Adrian Hunter
2026-01-08  8:05 ` [PATCH V2 05/20] i3c: mipi-i3c-hci: Switch DAT bitmap allocation to devm_bitmap_zalloc() Adrian Hunter
2026-01-08  8:05 ` [PATCH V2 06/20] i3c: mipi-i3c-hci: Switch PIO data allocation to devm_kzalloc() Adrian Hunter
2026-01-08  8:05 ` [PATCH V2 07/20] i3c: mipi-i3c-hci: Manage DMA deallocation via devres action Adrian Hunter
2026-01-08 14:56   ` Frank Li
2026-01-08  8:05 ` [PATCH V2 08/20] i3c: mipi-i3c-hci: Cache DAT in memory for Runtime PM restore Adrian Hunter
2026-01-08  8:05 ` [PATCH V2 09/20] i3c: mipi-i3c-hci: Introduce helper to restore DAT Adrian Hunter
2026-01-08  8:05 ` [PATCH V2 10/20] i3c: mipi-i3c-hci: Extract ring initialization from hci_dma_init() Adrian Hunter
2026-01-08  8:05 ` [PATCH V2 11/20] i3c: mipi-i3c-hci: Add DMA suspend and resume support Adrian Hunter
2026-01-08  8:05 ` Adrian Hunter [this message]
2026-01-08  8:05 ` [PATCH V2 13/20] i3c: mipi-i3c-hci: Add PIO " Adrian Hunter
2026-01-08  8:05 ` [PATCH V2 14/20] i3c: mipi-i3c-hci: Factor out software reset into helper Adrian Hunter
2026-01-08 14:57   ` Frank Li
2026-01-08  8:05 ` [PATCH V2 15/20] i3c: mipi-i3c-hci: Factor out IO mode setting " Adrian Hunter
2026-01-08 15:03   ` Frank Li
2026-01-08  8:05 ` [PATCH V2 16/20] i3c: mipi-i3c-hci: Factor out core initialization " Adrian Hunter
2026-01-08 15:25   ` Frank Li
2026-01-08  8:05 ` [PATCH V2 17/20] i3c: mipi-i3c-hci: Factor out master dynamic address setting " Adrian Hunter
2026-01-08 15:28   ` Frank Li
2026-01-08  8:05 ` [PATCH V2 18/20] i3c: master: Introduce optional Runtime PM support Adrian Hunter
2026-01-08 15:09   ` Frank Li
2026-01-09 11:42     ` Adrian Hunter
2026-01-12 16:04       ` Frank Li
2026-01-08  8:05 ` [PATCH V2 19/20] i3c: mipi-i3c-hci: Add " Adrian Hunter
2026-01-08 15:15   ` Frank Li
2026-01-08  8:05 ` [PATCH V2 20/20] i3c: mipi-i3c-hci-pci: Add " Adrian Hunter
2026-01-08 15:17   ` Frank Li

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20260108080558.21767-13-adrian.hunter@intel.com \
    --to=adrian.hunter@intel.com \
    --cc=Frank.Li@nxp.com \
    --cc=alexandre.belloni@bootlin.com \
    --cc=aniketmaurya@google.com \
    --cc=linux-i3c@lists.infradead.org \
    --cc=wsa+renesas@sang-engineering.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.