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

On Mon, May 25, 2026 at 02:54:03PM +0530, Manikandan Muralidharan wrote:
> 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 protected]>
> Signed-off-by: Manikandan Muralidharan <[email protected]>

Reviewed-by: Frank Li <[email protected]>

> ---
> 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
>

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