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net: macb: Add zynqmp SGMII dynamic configuration support

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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.
- 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>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Conor Dooley <conor.dooley@microchip.com> (for MPFS)
Reviewed-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Radhey Shyam Pandey 2022-09-14 18:03:16 +05:30 committed by Jakub Kicinski
parent 256dea9134
commit 32cee78181
1 changed files with 22 additions and 0 deletions
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22
drivers/net/ethernet/cadence/macb_main.c
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@ -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) {
dev_err(&pdev->dev, "Failed to read power management information\n");
goto err_out_phy_exit;
}
ret = zynqmp_pm_set_gem_config(pm_info[1], GEM_CONFIG_FIXED, 0);
if (ret)
goto err_out_phy_exit;
ret = zynqmp_pm_set_gem_config(pm_info[1], GEM_CONFIG_SGMII_MODE, 1);
if (ret)
goto err_out_phy_exit;
}
/* Fully reset controller at hardware level if mapped in device tree */
ret = device_reset_optional(&pdev->dev);
if (ret) {
@ -4629,6 +4649,8 @@ static int init_reset_optional(struct platform_device *pdev)
}
ret = macb_init(pdev);
err_out_phy_exit:
if (ret)
phy_exit(bp->sgmii_phy);