[PATCH v2] net: stmmac: socfpga: add runtime suspend/resume callback for stratix10 platform

[PATCH v2] net: stmmac: socfpga: add runtime suspend/resume callback for stratix10 platform

[Meng Li]

From: Meng Li <meng.li@windriver.com>

According to upstream commit 5ec55823438e("net: stmmac:
add clocks management for gmac driver"), it improve clocks
management for stmmac driver. So, it is necessary to implement
the runtime callback in dwmac-socfpga driver because it doesn't
use the common stmmac_pltfr_pm_ops instance. Otherwise, clocks
are not disabled when system enters suspend status.

Fixes: 5ec55823438e ("net: stmmac: add clocks management for gmac driver")
Cc: stable@vger.kernel.org
Signed-off-by: Meng Li <Meng.Li@windriver.com>
---

v2:
 - add static when define socfpga_dwmac_pm_ops
 - add fixed tag
 
---
 .../ethernet/stmicro/stmmac/dwmac-socfpga.c   | 24 +++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
index 85208128f135..e478a4017caa 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c
@@ -485,8 +485,28 @@ static int socfpga_dwmac_resume(struct device *dev)
 }
 #endif /* CONFIG_PM_SLEEP */
 
-static SIMPLE_DEV_PM_OPS(socfpga_dwmac_pm_ops, stmmac_suspend,
-					       socfpga_dwmac_resume);
+static int __maybe_unused socfpga_dwmac_runtime_suspend(struct device *dev)
+{
+	struct net_device *ndev = dev_get_drvdata(dev);
+	struct stmmac_priv *priv = netdev_priv(ndev);
+
+	stmmac_bus_clks_config(priv, false);
+
+	return 0;
+}
+
+static int __maybe_unused socfpga_dwmac_runtime_resume(struct device *dev)
+{
+	struct net_device *ndev = dev_get_drvdata(dev);
+	struct stmmac_priv *priv = netdev_priv(ndev);
+
+	return stmmac_bus_clks_config(priv, true);
+}
+
+const static struct dev_pm_ops socfpga_dwmac_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(stmmac_suspend, socfpga_dwmac_resume)
+	SET_RUNTIME_PM_OPS(socfpga_dwmac_runtime_suspend, socfpga_dwmac_runtime_resume, NULL)
+};
 
 static const struct socfpga_dwmac_ops socfpga_gen5_ops = {
 	.set_phy_mode = socfpga_gen5_set_phy_mode,
-- 
2.17.1


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Re: [PATCH v2] net: stmmac: socfpga: add runtime suspend/resume callback for stratix10 platform

[kernel test robot]

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Hi Meng,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.15 next-20211112]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Meng-Li/net-stmmac-socfpga-add-runtime-suspend-resume-callback-for-stratix10-platform/20211112-163612
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 5833291ab6de9c3e2374336b51c814e515e8f3a5
config: arm-defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/3fee8d6a97c77407e030c5831bed7924958ad53f
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Meng-Li/net-stmmac-socfpga-add-runtime-suspend-resume-callback-for-stratix10-platform/20211112-163612
        git checkout 3fee8d6a97c77407e030c5831bed7924958ad53f
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=arm 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c:506:1: warning: 'static' is not at beginning of declaration [-Wold-style-declaration]
     506 | const static struct dev_pm_ops socfpga_dwmac_pm_ops = {
         | ^~~~~


vim +/static +506 drivers/net/ethernet/stmicro/stmmac/dwmac-socfpga.c

   505	
 > 506	const static struct dev_pm_ops socfpga_dwmac_pm_ops = {
   507		SET_SYSTEM_SLEEP_PM_OPS(stmmac_suspend, socfpga_dwmac_resume)
   508		SET_RUNTIME_PM_OPS(socfpga_dwmac_runtime_suspend, socfpga_dwmac_runtime_resume, NULL)
   509	};
   510	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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