Subject: [PATCH v7 3/5] i3c: mipi-i3c-hci: add microchip sama7d65 SoC compatible with the required quirk

From: Manikandan Muralidharan <[email-masked]>
Date: Mon, 25 May 2026 14:54:03 +0530

Add support for microchip sama7d65 SoC I3C HCI master only IP
with additional clock support to enable bulk clock acquisition
and apply the required quirks.

Reviewed-by: Adrian Hunter <[email-masked]>
Signed-off-by: Manikandan Muralidharan <[email-masked]>
---
Changes in v7:
- Use (void *)(ulong) cast instead of direct (void *) cast in
  of_device_id.data for pointer-size safety across architectures
- Update commit message body to explicitly mention quirk application

Changes in v6:
- Reorder local variable definitions in i3c_hci_probe in descending
  order of line length

Changes in v5:
- Remove HCI_QUIRK_CLK_SUPPORT quirk and call
  devm_clk_bulk_get_all_enabled unconditionally, eliminating the
  need for a clock-specific quirk flag

Changes in v4:
- Remove the clock index variable MCHP_I3C_CLK_IDX as it is no
  longer needed after switching to bulk clock handling

Changes in v3:
- Make use of existing HCI_QUIRK_* code base instead of introducing
  separate MCHP_HCI_QUIRK_* flags
- Introduce HCI_QUIRK_CLK_SUPPORT to handle peripheral and system
  generic clk in bulk

Changes in v2:
- Platform specific changes integrated in the existing mipi-i3c-hci
  driver by introducing separate MCHP_HCI_QUIRK_* quirks and vendor
  specific quirk files rather than a standalone driver

 drivers/i3c/master/mipi-i3c-hci/core.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/i3c/master/mipi-i3c-hci/core.c b/drivers/i3c/master/mipi-i3c-hci/core.c
index b781dbed2165..4cdf2abd4219 100644
--- a/drivers/i3c/master/mipi-i3c-hci/core.c
+++ b/drivers/i3c/master/mipi-i3c-hci/core.c
@@ -8,6 +8,7 @@
  */
 
 #include <linux/bitfield.h>
+#include <linux/clk.h>
 #include <linux/device.h>
 #include <linux/errno.h>
 #include <linux/i3c/master.h>
@@ -969,6 +970,7 @@ static int i3c_hci_init(struct i3c_hci *hci)
 static int i3c_hci_probe(struct platform_device *pdev)
 {
 	const struct mipi_i3c_hci_platform_data *pdata = pdev->dev.platform_data;
+	struct clk_bulk_data *clks;
 	struct i3c_hci *hci;
 	int irq, ret;
 
@@ -1001,6 +1003,11 @@ static int i3c_hci_probe(struct platform_device *pdev)
 	if (!hci->quirks && platform_get_device_id(pdev))
 		hci->quirks = platform_get_device_id(pdev)->driver_data;
 
+	ret = devm_clk_bulk_get_all_enabled(&pdev->dev, &clks);
+	if (ret < 0)
+		return dev_err_probe(&pdev->dev, ret,
+				     "Failed to get clocks\n");
+
 	ret = i3c_hci_init(hci);
 	if (ret)
 		return ret;
@@ -1031,6 +1038,9 @@ static void i3c_hci_remove(struct platform_device *pdev)
 
 static const __maybe_unused struct of_device_id i3c_hci_of_match[] = {
 	{ .compatible = "mipi-i3c-hci", },
+	{ .compatible = "microchip,sama7d65-i3c-hci",
+	  .data = (void *)(ulong)(HCI_QUIRK_PIO_MODE | HCI_QUIRK_OD_PP_TIMING |
+				  HCI_QUIRK_RESP_BUF_THLD) },
 	{},
 };
 MODULE_DEVICE_TABLE(of, i3c_hci_of_match);
-- 
2.25.1