[PATCH v4 3/5] i3c: mipi-i3c-hci: add microchip sama7d65 SoC compatible with the appropriate quirk

[Manikandan Muralidharan]

Add support for microchip sama7d65 SoC I3C HCI master only IP
with additional clock support to enable bulk clock acquisition
for Microchip platforms using HCI_QUIRK_CLK_SUPPORT quirk.

Signed-off-by: Manikandan Muralidharan <manikandan.m at microchip.com>
---
Changes in v4:
- Remove the clock index variable MCHP_I3C_CLK_IDX

Changes in v3:
- Make use of existing HCI_QUIRK_* code base
- Introduce HCI_QUIRK_CLK_SUPPORT to handle/enable the required Peripheral
and system generic clk in bulk

Changes in v2:
- Platform specific changes are integrated in the existing mipi-i3c-hci
driver by introducing separate MCHP_HCI_QUIRK_* quirks and vendor
specific quirk files
---
 drivers/i3c/master/mipi-i3c-hci/core.c | 12 ++++++++++++
 drivers/i3c/master/mipi-i3c-hci/hci.h  |  1 +
 2 files changed, 13 insertions(+)

diff --git a/drivers/i3c/master/mipi-i3c-hci/core.c b/drivers/i3c/master/mipi-i3c-hci/core.c
index 284f3ed7af8c..41b7737d22ac 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>
@@ -950,6 +951,7 @@ static int i3c_hci_probe(struct platform_device *pdev)
 {
 	const struct mipi_i3c_hci_platform_data *pdata = pdev->dev.platform_data;
 	struct i3c_hci *hci;
+	struct clk_bulk_data *clks;
 	int irq, ret;
 
 	hci = devm_kzalloc(&pdev->dev, sizeof(*hci), GFP_KERNEL);
@@ -981,6 +983,13 @@ 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;
 
+	if (hci->quirks & HCI_QUIRK_CLK_SUPPORT) {
+		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;
@@ -1008,6 +1017,9 @@ 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 *)(HCI_QUIRK_PIO_MODE | HCI_QUIRK_OD_PP_TIMING |
+			   HCI_QUIRK_RESP_BUF_THLD | HCI_QUIRK_CLK_SUPPORT) },
 	{},
 };
 MODULE_DEVICE_TABLE(of, i3c_hci_of_match);
diff --git a/drivers/i3c/master/mipi-i3c-hci/hci.h b/drivers/i3c/master/mipi-i3c-hci/hci.h
index 9ac9d0e342f4..f01b959a28d9 100644
--- a/drivers/i3c/master/mipi-i3c-hci/hci.h
+++ b/drivers/i3c/master/mipi-i3c-hci/hci.h
@@ -150,6 +150,7 @@ struct i3c_hci_dev_data {
 #define HCI_QUIRK_OD_PP_TIMING		BIT(3)  /* Set OD and PP timings for AMD platforms */
 #define HCI_QUIRK_RESP_BUF_THLD		BIT(4)  /* Set resp buf thld to 0 for AMD platforms */
 #define HCI_QUIRK_RPM_ALLOWED		BIT(5)  /* Runtime PM allowed */
+#define HCI_QUIRK_CLK_SUPPORT		BIT(6)  /* Enable Clocks for Microchip platforms*/
 
 /* global functions */
 void mipi_i3c_hci_resume(struct i3c_hci *hci);
-- 
2.25.1