linux-kernel - Re: [PATCH 1/1] clk: bulk: add of_clk_bulk

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Date:   Mon, 11 Sep 2017 17:13:58 +0800
From:   Dong Aisheng <dongas86@...il.com>
To:     Sylwester Nawrocki <s.nawrocki@...sung.com>
Cc:     Dong Aisheng <aisheng.dong@....com>, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        sboyd@...eaurora.org, mturquette@...libre.com, shawnguo@...nel.org,
        Russell King <linux@....linux.org.uk>
Subject: Re: [PATCH 1/1] clk: bulk: add of_clk_bulk_get()

On Mon, Sep 11, 2017 at 10:58:19AM +0200, Sylwester Nawrocki wrote:
> On 09/11/2017 09:36 AM, Dong Aisheng wrote:
> >'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@...eaurora.org>
> >Cc: Michael Turquette <mturquette@...libre.com>
> >Cc: Russell King <linux@....linux.org.uk>
> >Reported-by: Shawn Guo <shawnguo@...nel.org>
> >Signed-off-by: Dong Aisheng <aisheng.dong@....com>
> >---
> >  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..3179f28 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("%s: Failed to get clk index: %d ret: %d\n",
> >+			       np->full_name, i, ret);
> 
> AFAIU full_node is not supposed now to be dereferenced directly,
> since storing of the full path string for each node is going to be
> removed. %pOF needs to be used instead, e.g.
> 
> 	pr_err("%pOF: failed to get clk %d: %d\n", np, i , ret);
> 

Thanks for telling this.
Just see Rob sent patches to clean up it some days ago.
Will update the patch.

Regards
Dong Aisheng

> >+			clks[i].clk = NULL;
> >+			goto err;
> >+		}
> >+	}
> >+
> >+	return 0;
> >+
> >+err:
> >+	clk_bulk_put(i, clks);
> >+
> >+	return ret;
> >+}
> >+#endif
> 
> -- 
> Regards,
> Sylwester
> --
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