[PATCH V3 1/1] clk: bulk: add of_clk_bulk_get()

[PATCH V3 1/1] clk: bulk: add of_clk_bulk_get()

[Dong Aisheng]

'clock-names' property is optinal in DT, so of_clk_bulk_get() is introduced
here to handle this for DT users without 'clock-names' specified.

Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Russell King <linux@arm.linux.org.uk>
Reported-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>

---
Changes since v2:
 * of_clk_bulk_get should return -ENOENT;

Changes since v1:
 * using %pOF instead of full_name
---
 drivers/clk/clk-bulk.c | 31 +++++++++++++++++++++++++++++++
 include/linux/clk.h    |  8 ++++++++
 2 files changed, 39 insertions(+)

diff --git a/drivers/clk/clk-bulk.c b/drivers/clk/clk-bulk.c
index c834f5a..896aa3b 100644
--- a/drivers/clk/clk-bulk.c
+++ b/drivers/clk/clk-bulk.c
@@ -19,6 +19,37 @@
 #include <linux/clk.h>
 #include <linux/device.h>
 #include <linux/export.h>
+#include <linux/of.h>
+
+#if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK)
+int __must_check of_clk_bulk_get(struct device_node *np, int num_clks,
+				 struct clk_bulk_data *clks)
+{
+	int ret;
+	int i;
+
+	for (i = 0; i < num_clks; i++)
+		clks[i].clk = NULL;
+
+	for (i = 0; i < num_clks; i++) {
+		clks[i].clk = of_clk_get(np, i);
+		if (IS_ERR(clks[i].clk)) {
+			ret = PTR_ERR(clks[i].clk);
+			pr_err("%pOF: Failed to get clk index: %d ret: %d\n",
+			       np, i, ret);
+			clks[i].clk = NULL;
+			goto err;
+		}
+	}
+
+	return 0;
+
+err:
+	clk_bulk_put(i, clks);
+
+	return ret;
+}
+#endif
 
 void clk_bulk_put(int num_clks, struct clk_bulk_data *clks)
 {
diff --git a/include/linux/clk.h b/include/linux/clk.h
index 12c96d9..a1f1f05 100644
--- a/include/linux/clk.h
+++ b/include/linux/clk.h
@@ -680,10 +680,18 @@ static inline void clk_bulk_disable_unprepare(int num_clks,
 }
 
 #if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK)
+int __must_check of_clk_bulk_get(struct device_node *np, int num_clks,
+				 struct clk_bulk_data *clks);
 struct clk *of_clk_get(struct device_node *np, int index);
 struct clk *of_clk_get_by_name(struct device_node *np, const char *name);
 struct clk *of_clk_get_from_provider(struct of_phandle_args *clkspec);
 #else
+static int of_clk_bulk_get(struct device_node *np, int num_clks,
+			   struct clk_bulk_data *clks)
+{
+	return -ENOENT;
+}
+
 static inline struct clk *of_clk_get(struct device_node *np, int index)
 {
 	return ERR_PTR(-ENOENT);
-- 
2.7.4

[PATCH V3 1/1] clk: bulk: add of_clk_bulk_get()

[kbuild test robot]

Hi Dong,

[auto build test ERROR on clk/clk-next]
[also build test ERROR on v4.14-rc1 next-20170922]
[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/Dong-Aisheng/clk-bulk-add-of_clk_bulk_get/20170921-203645
base:   https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-next
config: sh-apsh4a3a_defconfig (attached as .config)
compiler: sh4-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/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 arch/sh/kernel/setup.c:28:0:
>> include/linux/clk.h:689:12: error: 'of_clk_bulk_get' defined but not used [-Werror=unused-function]
    static int of_clk_bulk_get(struct device_node *np, int num_clks,
               ^~~~~~~~~~~~~~~
   cc1: all warnings being treated as errors

vim +/of_clk_bulk_get +689 include/linux/clk.h

   681	
   682	#if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK)
   683	int __must_check of_clk_bulk_get(struct device_node *np, int num_clks,
   684					 struct clk_bulk_data *clks);
   685	struct clk *of_clk_get(struct device_node *np, int index);
   686	struct clk *of_clk_get_by_name(struct device_node *np, const char *name);
   687	struct clk *of_clk_get_from_provider(struct of_phandle_args *clkspec);
   688	#else
 > 689	static int of_clk_bulk_get(struct device_node *np, int num_clks,
   690				   struct clk_bulk_data *clks)
   691	{
   692		return -ENOENT;
   693	}
   694	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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[PATCH V3 1/1] clk: bulk: add of_clk_bulk_get()

[Geert Uytterhoeven]

On Sun, Sep 24, 2017 at 4:06 AM, kbuild test robot <lkp@intel.com> wrote:
> [auto build test ERROR on clk/clk-next]
> [also build test ERROR on v4.14-rc1 next-20170922]
> [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/Dong-Aisheng/clk-bulk-add-of_clk_bulk_get/20170921-203645
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-next
> config: sh-apsh4a3a_defconfig (attached as .config)
> compiler: sh4-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
> reproduce:
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/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 arch/sh/kernel/setup.c:28:0:
>>> include/linux/clk.h:689:12: error: 'of_clk_bulk_get' defined but not used [-Werror=unused-function]
>     static int of_clk_bulk_get(struct device_node *np, int num_clks,
>                ^~~~~~~~~~~~~~~
>    cc1: all warnings being treated as errors
>
> vim +/of_clk_bulk_get +689 include/linux/clk.h
>
>    681
>    682  #if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK)
>    683  int __must_check of_clk_bulk_get(struct device_node *np, int num_clks,
>    684                                   struct clk_bulk_data *clks);
>    685  struct clk *of_clk_get(struct device_node *np, int index);
>    686  struct clk *of_clk_get_by_name(struct device_node *np, const char *name);
>    687  struct clk *of_clk_get_from_provider(struct of_phandle_args *clkspec);
>    688  #else
>  > 689  static int of_clk_bulk_get(struct device_node *np, int num_clks,

static inline

>    690                             struct clk_bulk_data *clks)
>    691  {
>    692          return -ENOENT;
>    693  }
>    694

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds