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SubjectRe: [PATCH net-next 2/2] net: macb: Add zynqmp SGMII dynamic configuration support
Date
On 22/07/2022 09:12, Radhey Shyam Pandey wrote:
> Add support for the dynamic configuration which takes care of configuring
> the GEM secure space configuration registers using EEMI APIs. High level
> sequence is to:
> - Check for the PM dynamic configuration support, if no error proceed with
> GEM dynamic configurations(next steps) otherwise skip the dynamic
> configuration.

For mpfs:
Tested-by: Conor Dooley <conor.dooley@microchip.com>

> - Configure GEM Fixed configurations.
> - Configure GEM_CLK_CTRL (gemX_sgmii_mode).
> - Trigger GEM reset.
>
> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
> ---
> drivers/net/ethernet/cadence/macb_main.c | 20 ++++++++++++++++++++
> 1 file changed, 20 insertions(+)
>
> diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
> index 7eb7822cd184..97f77fa9e165 100644
> --- a/drivers/net/ethernet/cadence/macb_main.c
> +++ b/drivers/net/ethernet/cadence/macb_main.c
> @@ -38,6 +38,7 @@
> #include <linux/pm_runtime.h>
> #include <linux/ptp_classify.h>
> #include <linux/reset.h>
> +#include <linux/firmware/xlnx-zynqmp.h>
> #include "macb.h"
>
> /* This structure is only used for MACB on SiFive FU540 devices */
> @@ -4621,6 +4622,25 @@ static int init_reset_optional(struct platform_device *pdev)
> "failed to init SGMII PHY\n");
> }
>
> + ret = zynqmp_pm_is_function_supported(PM_IOCTL, IOCTL_SET_GEM_CONFIG);
> + if (!ret) {
> + u32 pm_info[2];
> +
> + ret = of_property_read_u32_array(pdev->dev.of_node, "power-domains",
> + pm_info, ARRAY_SIZE(pm_info));
> + if (ret < 0) {
> + dev_err(&pdev->dev, "Failed to read power management information\n");
> + return ret;
> + }
> + ret = zynqmp_pm_set_gem_config(pm_info[1], GEM_CONFIG_FIXED, 0);
> + if (ret < 0)
> + return ret;
> +
> + ret = zynqmp_pm_set_gem_config(pm_info[1], GEM_CONFIG_SGMII_MODE, 1);
> + if (ret < 0)
> + return ret;
> + }
> +
> /* Fully reset controller at hardware level if mapped in device tree */
> ret = device_reset_optional(&pdev->dev);
> if (ret) {
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