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phy: xilinx: add runtime PM support

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[ Upstream commit b3db66f624 ]

Added Runtime power management support to the xilinx phy driver and using
DEFINE_RUNTIME_DEV_PM_OPS new macros allows the compiler to remove the
unused dev_pm_ops structure and related functions if !CONFIG_PM without
the need to mark the functions __maybe_unused.

Signed-off-by: Piyush Mehta <piyush.mehta@amd.com>
Link: https://lore.kernel.org/r/20230613140250.3018947-2-piyush.mehta@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Stable-dep-of: 5af9b304bc60 ("phy: xilinx: phy-zynqmp: Fix SGMII linkup failure on resume")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Piyush Mehta
2023-06-13 19:32:49 +05:30
committed by Greg Kroah-Hartman
parent 1e4782f826
commit ef40ae518a
1 changed files with 28 additions and 7 deletions
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35
drivers/phy/xilinx/phy-zynqmp.c
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@@ -21,6 +21,7 @@
#include <linux/of.h> #include <linux/of.h>
#include <linux/phy/phy.h> #include <linux/phy/phy.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h> #include <linux/slab.h>
#include <dt-bindings/phy/phy.h> #include <dt-bindings/phy/phy.h>
@@ -821,7 +822,7 @@ static struct phy *xpsgtr_xlate(struct device *dev,
* Power Management * Power Management
*/ */
static int __maybe_unused xpsgtr_suspend(struct device *dev) static int xpsgtr_runtime_suspend(struct device *dev)
{ {
struct xpsgtr_dev *gtr_dev = dev_get_drvdata(dev); struct xpsgtr_dev *gtr_dev = dev_get_drvdata(dev);
unsigned int i; unsigned int i;
@@ -836,7 +837,7 @@ static int __maybe_unused xpsgtr_suspend(struct device *dev)
return 0; return 0;
} }
static int __maybe_unused xpsgtr_resume(struct device *dev) static int xpsgtr_runtime_resume(struct device *dev)
{ {
struct xpsgtr_dev *gtr_dev = dev_get_drvdata(dev); struct xpsgtr_dev *gtr_dev = dev_get_drvdata(dev);
unsigned int icm_cfg0, icm_cfg1; unsigned int icm_cfg0, icm_cfg1;
@@ -877,10 +878,8 @@ err_clk_put:
return err; return err;
} }
static const struct dev_pm_ops xpsgtr_pm_ops = { static DEFINE_RUNTIME_DEV_PM_OPS(xpsgtr_pm_ops, xpsgtr_runtime_suspend,
SET_SYSTEM_SLEEP_PM_OPS(xpsgtr_suspend, xpsgtr_resume) xpsgtr_runtime_resume, NULL);
};
/* /*
* Probe & Platform Driver * Probe & Platform Driver
*/ */
@@ -1006,6 +1005,16 @@ static int xpsgtr_probe(struct platform_device *pdev)
ret = PTR_ERR(provider); ret = PTR_ERR(provider);
goto err_clk_put; goto err_clk_put;
} }
pm_runtime_set_active(gtr_dev->dev);
pm_runtime_enable(gtr_dev->dev);
ret = pm_runtime_resume_and_get(gtr_dev->dev);
if (ret < 0) {
pm_runtime_disable(gtr_dev->dev);
goto err_clk_put;
}
return 0; return 0;
err_clk_put: err_clk_put:
@@ -1015,6 +1024,17 @@ err_clk_put:
return ret; return ret;
} }
static int xpsgtr_remove(struct platform_device *pdev)
{
struct xpsgtr_dev *gtr_dev = platform_get_drvdata(pdev);
pm_runtime_disable(gtr_dev->dev);
pm_runtime_put_noidle(gtr_dev->dev);
pm_runtime_set_suspended(gtr_dev->dev);
return 0;
}
static const struct of_device_id xpsgtr_of_match[] = { static const struct of_device_id xpsgtr_of_match[] = {
{ .compatible = "xlnx,zynqmp-psgtr", }, { .compatible = "xlnx,zynqmp-psgtr", },
{ .compatible = "xlnx,zynqmp-psgtr-v1.1", }, { .compatible = "xlnx,zynqmp-psgtr-v1.1", },
@@ -1024,10 +1044,11 @@ MODULE_DEVICE_TABLE(of, xpsgtr_of_match);
static struct platform_driver xpsgtr_driver = { static struct platform_driver xpsgtr_driver = {
.probe = xpsgtr_probe, .probe = xpsgtr_probe,
.remove = xpsgtr_remove,
.driver = { .driver = {
.name = "xilinx-psgtr", .name = "xilinx-psgtr",
.of_match_table = xpsgtr_of_match, .of_match_table = xpsgtr_of_match,
.pm = &xpsgtr_pm_ops, .pm = pm_ptr(&xpsgtr_pm_ops),
}, },
}; };