With this implementation clk_get and clk_enable always succeed. The
counterparts clk_put and clk_disable only do some minor error checking.
Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
---
lib/Kconfig | 6 ++++++
lib/Makefile | 2 ++
lib/dummyclk.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 62 insertions(+), 0 deletions(-)
create mode 100644 lib/dummyclk.c
Hello,
this patch isn't really UIO related, but as my platform driver uses the
clk API and that's not implemented on X86 here comes a dummy
implementation.
This patch was already sent but up to now I got no feedback for it.
Best regards
Uwe
diff --git a/lib/Kconfig b/lib/Kconfig
index 2d53dc0..098830d 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -144,4 +144,10 @@ config CHECK_SIGNATURE
config HAVE_LMB
boolean
+config DUMMY_CLK
+ def_bool y if X86
+ help
+ This provides a dummy implementation for the API defined in
+ linux/clk.h for platforms that don't implement it theirselves.
+
endmenu
diff --git a/lib/Makefile b/lib/Makefile
index bf8000f..e355c69 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -70,6 +70,8 @@ lib-$(CONFIG_GENERIC_BUG) += bug.o
obj-$(CONFIG_HAVE_LMB) += lmb.o
+obj-$(CONFIG_DUMMY_CLK) += dummyclk.o
+
hostprogs-y := gen_crc32table
clean-files := crc32table.h
diff --git a/lib/dummyclk.c b/lib/dummyclk.c
new file mode 100644
index 0000000..bf364df
--- /dev/null
+++ b/lib/dummyclk.c
@@ -0,0 +1,54 @@
+/*
+ * lib/dummyclk.c
+ *
+ * Copyright (C) 2008 by Digi International Inc.
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ */
+#include <linux/device.h>
+#include <linux/err.h>
+
+struct clk {
+ unsigned int enablecnt;
+};
+
+struct clk *clk_get(struct device *dev, const char *id)
+{
+ struct clk *ret = kzalloc(sizeof(*ret), GFP_KERNEL);
+
+ if (ret)
+ return ret;
+ else
+ return ERR_PTR(-ENOMEM);
+}
+EXPORT_SYMBOL(clk_get);
+
+void clk_put(struct clk *clk)
+{
+ WARN_ON(clk->enablecnt);
+}
+EXPORT_SYMBOL(clk_put);
+
+int clk_enable(struct clk *clk)
+{
+ ++clk->enablecnt;
+ return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+ BUG_ON(!clk->enablecnt);
+ --clk->enablecnt;
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+ BUG_ON(!clk->enablecnt);
+ return 0;
+}
+EXPORT_SYMBOL(clk_get_rate);
--
1.5.5
--
