diff mbox

[v5,4/4] clk: samsung: exynos-audss: Use runtime PM

Message ID 1485345194-3196-5-git-send-email-m.szyprowski@samsung.com (mailing list archive)
State Not Applicable
Headers show

Commit Message

Marek Szyprowski Jan. 25, 2017, 11:53 a.m. UTC 
This patch adds support for runtime PM to Exynos Audio SubSystem driver to
enable full support for audio power domain on Exynos5 SoCs. The main change
is moving register saving and restoring code from system sleep PM ops to
runtime PM ops and implementing system sleep PM ops with generic
pm_runtime_force_suspend/resume helpers. Runtime PM of the Exynos AudSS
device is managed from clock core depending on the preparation status
of the provided clocks.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
---
 .../devicetree/bindings/clock/clk-exynos-audss.txt |  6 +++
 drivers/clk/samsung/clk-exynos-audss.c             | 62 +++++++++++++---------
 2 files changed, 43 insertions(+), 25 deletions(-)

Comments

kernel test robot Jan. 26, 2017, 1:28 a.m. UTC | #1 
Hi Marek,

[auto build test ERROR on clk/clk-next]
[also build test ERROR on next-20170125]
[cannot apply to v4.10-rc5]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Marek-Szyprowski/Add-runtime-PM-support-for-clocks-on-Exynos-SoC-example/20170125-202948
base:   https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-next
config: sh-allmodconfig (attached as .config)
compiler: sh4-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=sh 

All errors (new ones prefixed by >>):

   In file included from include/linux/device.h:25:0,
                    from include/linux/node.h:17,
                    from include/linux/cpu.h:16,
                    from include/linux/of_device.h:4,
                    from drivers/clk/samsung/clk-exynos-audss.c:17:
>> drivers/clk/samsung/clk-exynos-audss.c:285:21: error: 'exynos_audss_clk_suspend' undeclared here (not in a function)
     SET_RUNTIME_PM_OPS(exynos_audss_clk_suspend, exynos_audss_clk_resume,
                        ^
   include/linux/pm.h:359:21: note: in definition of macro 'SET_RUNTIME_PM_OPS'
     .runtime_suspend = suspend_fn, \
                        ^~~~~~~~~~
>> drivers/clk/samsung/clk-exynos-audss.c:285:47: error: 'exynos_audss_clk_resume' undeclared here (not in a function)
     SET_RUNTIME_PM_OPS(exynos_audss_clk_suspend, exynos_audss_clk_resume,
                                                  ^
   include/linux/pm.h:360:20: note: in definition of macro 'SET_RUNTIME_PM_OPS'
     .runtime_resume = resume_fn, \
                       ^~~~~~~~~

vim +/exynos_audss_clk_suspend +285 drivers/clk/samsung/clk-exynos-audss.c

   279			clk_disable_unprepare(epll);
   280	
   281		return 0;
   282	}
   283	
   284	static const struct dev_pm_ops exynos_audss_clk_pm_ops = {
 > 285		SET_RUNTIME_PM_OPS(exynos_audss_clk_suspend, exynos_audss_clk_resume,
   286				   NULL)
   287		SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
   288					     pm_runtime_force_resume)

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
diff mbox

Patch

diff --git a/Documentation/devicetree/bindings/clock/clk-exynos-audss.txt b/Documentation/devicetree/bindings/clock/clk-exynos-audss.txt
index 0c3d6015868d..f3635d5aeba4 100644
--- a/Documentation/devicetree/bindings/clock/clk-exynos-audss.txt
+++ b/Documentation/devicetree/bindings/clock/clk-exynos-audss.txt
@@ -33,6 +33,12 @@  Required Properties:
 - clock-names: Aliases for the above clocks. They should be "pll_ref",
   "pll_in", "cdclk", "sclk_audio", and "sclk_pcm_in" respectively.
 
+Optional Properties:
+
+  - power-domains: a phandle to respective power domain node as described by
+    generic PM domain bindings (see power/power_domain.txt for more
+    information).
+
 The following is the list of clocks generated by the controller. Each clock is
 assigned an identifier and client nodes use this identifier to specify the
 clock which they consume. Some of the clocks are available only on a particular
diff --git a/drivers/clk/samsung/clk-exynos-audss.c b/drivers/clk/samsung/clk-exynos-audss.c
index cb7df358a27d..070a82ee15f7 100644
--- a/drivers/clk/samsung/clk-exynos-audss.c
+++ b/drivers/clk/samsung/clk-exynos-audss.c
@@ -18,6 +18,7 @@ 
 #include <linux/syscore_ops.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
 
 #include <dt-bindings/clock/exynos-audss-clk.h>
 
@@ -134,6 +135,7 @@  static int exynos_audss_clk_probe(struct platform_device *pdev)
 	struct clk *pll_ref, *pll_in, *cdclk, *sclk_audio, *sclk_pcm_in;
 	const struct exynos_audss_clk_drvdata *variant;
 	struct resource *res;
+	struct device *dev = &pdev->dev;
 	int i, ret = 0;
 
 	variant = of_device_get_match_data(&pdev->dev);
@@ -141,15 +143,15 @@  static int exynos_audss_clk_probe(struct platform_device *pdev)
 		return -EINVAL;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	reg_base = devm_ioremap_resource(&pdev->dev, res);
+	reg_base = devm_ioremap_resource(dev, res);
 	if (IS_ERR(reg_base)) {
-		dev_err(&pdev->dev, "failed to map audss registers\n");
+		dev_err(dev, "failed to map audss registers\n");
 		return PTR_ERR(reg_base);
 	}
 
 	epll = ERR_PTR(-ENODEV);
 
-	clk_table = devm_kzalloc(&pdev->dev,
+	clk_table = devm_kzalloc(dev,
 				sizeof(struct clk *) * EXYNOS_AUDSS_MAX_CLKS,
 				GFP_KERNEL);
 	if (!clk_table)
@@ -158,8 +160,8 @@  static int exynos_audss_clk_probe(struct platform_device *pdev)
 	clk_data.clks = clk_table;
 	clk_data.clk_num = variant->num_clks;
 
-	pll_ref = devm_clk_get(&pdev->dev, "pll_ref");
-	pll_in = devm_clk_get(&pdev->dev, "pll_in");
+	pll_ref = devm_clk_get(dev, "pll_ref");
+	pll_in = devm_clk_get(dev, "pll_in");
 	if (!IS_ERR(pll_ref))
 		mout_audss_p[0] = __clk_get_name(pll_ref);
 	if (!IS_ERR(pll_in)) {
@@ -170,81 +172,89 @@  static int exynos_audss_clk_probe(struct platform_device *pdev)
 
 			ret = clk_prepare_enable(epll);
 			if (ret) {
-				dev_err(&pdev->dev,
+				dev_err(dev,
 					"failed to prepare the epll clock\n");
 				return ret;
 			}
 		}
 	}
-	clk_table[EXYNOS_MOUT_AUDSS] = clk_register_mux(NULL, "mout_audss",
+
+	/*
+	 * Enable runtime PM here, so clock core with use runtime PM for all
+	 * registered clocks.
+	 */
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+
+	clk_table[EXYNOS_MOUT_AUDSS] = clk_register_mux(dev, "mout_audss",
 				mout_audss_p, ARRAY_SIZE(mout_audss_p),
 				CLK_SET_RATE_NO_REPARENT,
 				reg_base + ASS_CLK_SRC, 0, 1, 0, &lock);
 
-	cdclk = devm_clk_get(&pdev->dev, "cdclk");
-	sclk_audio = devm_clk_get(&pdev->dev, "sclk_audio");
+	cdclk = devm_clk_get(dev, "cdclk");
+	sclk_audio = devm_clk_get(dev, "sclk_audio");
 	if (!IS_ERR(cdclk))
 		mout_i2s_p[1] = __clk_get_name(cdclk);
 	if (!IS_ERR(sclk_audio))
 		mout_i2s_p[2] = __clk_get_name(sclk_audio);
-	clk_table[EXYNOS_MOUT_I2S] = clk_register_mux(NULL, "mout_i2s",
+	clk_table[EXYNOS_MOUT_I2S] = clk_register_mux(dev, "mout_i2s",
 				mout_i2s_p, ARRAY_SIZE(mout_i2s_p),
 				CLK_SET_RATE_NO_REPARENT,
 				reg_base + ASS_CLK_SRC, 2, 2, 0, &lock);
 
-	clk_table[EXYNOS_DOUT_SRP] = clk_register_divider(NULL, "dout_srp",
+	clk_table[EXYNOS_DOUT_SRP] = clk_register_divider(dev, "dout_srp",
 				"mout_audss", 0, reg_base + ASS_CLK_DIV, 0, 4,
 				0, &lock);
 
-	clk_table[EXYNOS_DOUT_AUD_BUS] = clk_register_divider(NULL,
+	clk_table[EXYNOS_DOUT_AUD_BUS] = clk_register_divider(dev,
 				"dout_aud_bus", "dout_srp", 0,
 				reg_base + ASS_CLK_DIV, 4, 4, 0, &lock);
 
-	clk_table[EXYNOS_DOUT_I2S] = clk_register_divider(NULL, "dout_i2s",
+	clk_table[EXYNOS_DOUT_I2S] = clk_register_divider(dev, "dout_i2s",
 				"mout_i2s", 0, reg_base + ASS_CLK_DIV, 8, 4, 0,
 				&lock);
 
-	clk_table[EXYNOS_SRP_CLK] = clk_register_gate(NULL, "srp_clk",
+	clk_table[EXYNOS_SRP_CLK] = clk_register_gate(dev, "srp_clk",
 				"dout_srp", CLK_SET_RATE_PARENT,
 				reg_base + ASS_CLK_GATE, 0, 0, &lock);
 
-	clk_table[EXYNOS_I2S_BUS] = clk_register_gate(NULL, "i2s_bus",
+	clk_table[EXYNOS_I2S_BUS] = clk_register_gate(dev, "i2s_bus",
 				"dout_aud_bus", CLK_SET_RATE_PARENT,
 				reg_base + ASS_CLK_GATE, 2, 0, &lock);
 
-	clk_table[EXYNOS_SCLK_I2S] = clk_register_gate(NULL, "sclk_i2s",
+	clk_table[EXYNOS_SCLK_I2S] = clk_register_gate(dev, "sclk_i2s",
 				"dout_i2s", CLK_SET_RATE_PARENT,
 				reg_base + ASS_CLK_GATE, 3, 0, &lock);
 
-	clk_table[EXYNOS_PCM_BUS] = clk_register_gate(NULL, "pcm_bus",
+	clk_table[EXYNOS_PCM_BUS] = clk_register_gate(dev, "pcm_bus",
 				 "sclk_pcm", CLK_SET_RATE_PARENT,
 				reg_base + ASS_CLK_GATE, 4, 0, &lock);
 
-	sclk_pcm_in = devm_clk_get(&pdev->dev, "sclk_pcm_in");
+	sclk_pcm_in = devm_clk_get(dev, "sclk_pcm_in");
 	if (!IS_ERR(sclk_pcm_in))
 		sclk_pcm_p = __clk_get_name(sclk_pcm_in);
-	clk_table[EXYNOS_SCLK_PCM] = clk_register_gate(NULL, "sclk_pcm",
+	clk_table[EXYNOS_SCLK_PCM] = clk_register_gate(dev, "sclk_pcm",
 				sclk_pcm_p, CLK_SET_RATE_PARENT,
 				reg_base + ASS_CLK_GATE, 5, 0, &lock);
 
 	if (variant->has_adma_clk) {
-		clk_table[EXYNOS_ADMA] = clk_register_gate(NULL, "adma",
+		clk_table[EXYNOS_ADMA] = clk_register_gate(dev, "adma",
 				"dout_srp", CLK_SET_RATE_PARENT,
 				reg_base + ASS_CLK_GATE, 9, 0, &lock);
 	}
 
 	for (i = 0; i < clk_data.clk_num; i++) {
 		if (IS_ERR(clk_table[i])) {
-			dev_err(&pdev->dev, "failed to register clock %d\n", i);
+			dev_err(dev, "failed to register clock %d\n", i);
 			ret = PTR_ERR(clk_table[i]);
 			goto unregister;
 		}
 	}
 
-	ret = of_clk_add_provider(pdev->dev.of_node, of_clk_src_onecell_get,
+	ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
 					&clk_data);
 	if (ret) {
-		dev_err(&pdev->dev, "failed to add clock provider\n");
+		dev_err(dev, "failed to add clock provider\n");
 		goto unregister;
 	}
 
@@ -272,8 +282,10 @@  static int exynos_audss_clk_remove(struct platform_device *pdev)
 }
 
 static const struct dev_pm_ops exynos_audss_clk_pm_ops = {
-	SET_LATE_SYSTEM_SLEEP_PM_OPS(exynos_audss_clk_suspend,
-				     exynos_audss_clk_resume)
+	SET_RUNTIME_PM_OPS(exynos_audss_clk_suspend, exynos_audss_clk_resume,
+			   NULL)
+	SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				     pm_runtime_force_resume)
 };
 
 static struct platform_driver exynos_audss_clk_driver = {