Linux-Samsung-soc Archive on lore.kernel.org
 help / color / Atom feed
From: "Heiko Stübner" <heiko@sntech.de>
To: Kukjin Kim <kgene.kim@samsung.com>
Cc: mturquette@linaro.org, linux-arm-kernel@lists.infradead.org,
	linux-samsung-soc@vger.kernel.org,
	Thomas Abraham <thomas.abraham@linaro.org>,
	Sylwester Nawrocki <sylvester.nawrocki@gmail.com>,
	t.figa@samsung.com
Subject: [PATCH 4/4] clk: samsung: add infrastructure to add separate aliases
Date: Wed, 13 Mar 2013 15:00:37 +0100
Message-ID: <201303131500.37646.heiko@sntech.de> (raw)
In-Reply-To: <201303131458.18671.heiko@sntech.de>

The current code adds aliases, if necessary, directly when adding the clock,
limiting the number of possible aliases to one.

Some platforms need more than one alias, like the hsmmc pclocks on s3c2416
which need a "hsmmc" and "mmc_busclk.0" alias for the s3c-sdhci driver.

Therefore add the possibility to separately add clock aliases for previously
created clocks.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---
 drivers/clk/samsung/clk.c |   33 +++++++++++++++++++++++++++++++++
 drivers/clk/samsung/clk.h |   21 +++++++++++++++++++++
 2 files changed, 54 insertions(+), 0 deletions(-)

diff --git a/drivers/clk/samsung/clk.c b/drivers/clk/samsung/clk.c
index 1ed5716..82f27f6 100644
--- a/drivers/clk/samsung/clk.c
+++ b/drivers/clk/samsung/clk.c
@@ -97,6 +97,39 @@ void samsung_clk_add_lookup(struct clk *clk, unsigned int id)
 		clk_table[id] = clk;
 }
 
+/* register a list of aliases */
+void __init samsung_clk_register_alias(struct samsung_clock_alias *list,
+					unsigned int nr_clk)
+{
+	struct clk *clk;
+	unsigned int idx, ret;
+
+	if (!clk_table) {
+		pr_err("%s: clock table missing\n", __func__);
+		return;
+	}
+
+	for (idx = 0; idx < nr_clk; idx++, list++) {
+		if (!list->id) {
+			pr_err("%s: clock id missing for index %d\n", __func__,
+				idx);
+			continue;
+		}
+
+		clk = clk_table[list->id];
+		if (!clk) {
+			pr_err("%s: failed to find clock %d\n", __func__,
+				list->id);
+			continue;
+		}
+
+		ret = clk_register_clkdev(clk, list->alias, list->dev_name);
+		if (ret)
+			pr_err("%s: failed to register lookup %s\n",
+					__func__, list->alias);
+	}
+}
+
 /* register a list of fixed clocks */
 void __init samsung_clk_register_fixed_rate(
 		struct samsung_fixed_rate_clock *list, unsigned int nr_clk)
diff --git a/drivers/clk/samsung/clk.h b/drivers/clk/samsung/clk.h
index 26a752b..6bacd6f 100644
--- a/drivers/clk/samsung/clk.h
+++ b/drivers/clk/samsung/clk.h
@@ -23,6 +23,25 @@
 #include <mach/map.h>
 
 /**
+ * struct samsung_clock_alias: information about mux clock
+ * @id: platform specific id of the clock.
+ * @dev_name: name of the device to which this clock belongs.
+ * @alias: optional clock alias name to be assigned to this clock.
+ */
+struct samsung_clock_alias {
+	unsigned int		id;
+	const char		*dev_name;
+	const char		*alias;
+};
+
+#define ALIAS(_id, dname, a)	\
+	{							\
+		.id		= _id,				\
+		.dev_name	= dname,			\
+		.alias		= a,				\
+	}
+
+/**
  * struct samsung_fixed_rate_clock: information about fixed-rate clock
  * @id: platform specific id of the clock.
  * @name: name of this fixed-rate clock.
@@ -251,6 +270,8 @@ extern void __init samsung_clk_of_register_fixed_ext(
 
 extern void samsung_clk_add_lookup(struct clk *clk, unsigned int id);
 
+extern void samsung_clk_register_alias(struct samsung_clock_alias *list,
+		unsigned int nr_clk);
 extern void __init samsung_clk_register_fixed_rate(
 		struct samsung_fixed_rate_clock *clk_list, unsigned int nr_clk);
 extern void __init samsung_clk_register_fixed_factor(
-- 
1.7.2.3

  parent reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-13 13:58 [PATCH v2 0/4] clk: samsung: pm fixes and multiple aliases Heiko Stübner
2013-03-13 13:59 ` [PATCH v2 1/4] clk: samsung: register clk_div_tables for divider clocks Heiko Stübner
2013-03-13 13:59 ` [PATCH v2 2/4] clk: samsung: fix pm init on non-dt platforms Heiko Stübner
2013-03-13 14:00 ` [PATCH v2 3/4] clk: samsung: always allocate the clk_table Heiko Stübner
2013-03-13 14:00 ` Heiko Stübner [this message]
2013-03-25  9:26 ` [PATCH v2 0/4] clk: samsung: pm fixes and multiple aliases Kukjin Kim
2013-03-27  0:59   ` Mike Turquette
2013-04-04  4:06     ` Kukjin Kim
  -- strict thread matches above, loose matches on Subject: below --
2013-03-11 23:42 [PATCH 0/4] clk: samsung: small fixes and enhancements Heiko Stübner
2013-03-11 23:45 ` [PATCH 4/4] clk: samsung: add infrastructure to add separate aliases Heiko Stübner
2013-03-12  9:57   ` Thomas Abraham
2013-03-12 10:04     ` Heiko Stübner
2013-03-12 10:48       ` Thomas Abraham

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=201303131500.37646.heiko@sntech.de \
    --to=heiko@sntech.de \
    --cc=kgene.kim@samsung.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-samsung-soc@vger.kernel.org \
    --cc=mturquette@linaro.org \
    --cc=sylvester.nawrocki@gmail.com \
    --cc=t.figa@samsung.com \
    --cc=thomas.abraham@linaro.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-Samsung-soc Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-samsung-soc/0 linux-samsung-soc/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-samsung-soc linux-samsung-soc/ https://lore.kernel.org/linux-samsung-soc \
		linux-samsung-soc@vger.kernel.org
	public-inbox-index linux-samsung-soc

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-samsung-soc


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git