MIPS: ath79: Use the common clk API

Make the code simpler and open the way for device tree clocks.

[ralf@linux-mips.org: Resolved conflict with 2a552da6 (MIPS/IRQCHIP: Move
irq_chip from arch/mips to drivers/irqchip.)]

Signed-off-by: Alban Bedel <albeu@free.fr>
Cc: linux-mips@linux-mips.org
Cc: Andrew Bresticker <abrestic@chromium.org>
Cc: Qais Yousef <qais.yousef@imgtec.com>
Cc: Wolfram Sang <wsa@the-dreams.de>
Cc: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Cc: Gabor Juhos <juhosg@openwrt.org>
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9774/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

2 files changed, 3 insertions, 27 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index e34660cddf9d..2424ddc43a77 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -124,6 +124,7 @@ config ATH79
         select CSRC_R4K
         select DMA_NONCOHERENT
         select HAVE_CLK
+        select COMMON_CLK
         select CLKDEV_LOOKUP
         select IRQ_MIPS_CPU
         select MIPS_MACHINE
diff --git a/arch/mips/ath79/clock.c b/arch/mips/ath79/clock.c
index 226ddf0a0a97..1fcb6917783c 100644
--- a/arch/mips/ath79/clock.c
+++ b/arch/mips/ath79/clock.c
@@ -17,6 +17,7 @@
 #include <linux/err.h>
 #include <linux/clk.h>
 #include <linux/clkdev.h>
+#include <linux/clk-provider.h>
 
 #include <asm/div64.h>
 
@@ -28,21 +29,15 @@
 #define AR724X_BASE_FREQ        5000000
 #define AR913X_BASE_FREQ        5000000
 
-struct clk {
-        unsigned long rate;
-};
-
 static void __init ath79_add_sys_clkdev(const char *id, unsigned long rate)
 {
         struct clk *clk;
         int err;
 
-        clk = kzalloc(sizeof(*clk), GFP_KERNEL);
+        clk = clk_register_fixed_rate(NULL, id, NULL, CLK_IS_ROOT, rate);
         if (!clk)
                 panic("failed to allocate %s clock structure", id);
 
-        clk->rate = rate;
-
         err = clk_register_clkdev(clk, id, NULL);
         if (err)
                 panic("unable to register %s clock device", id);
@@ -468,23 +463,3 @@ ath79_get_sys_clk_rate(const char *id)
 
         return rate;
 }
-
-/*
- * Linux clock API
- */
-int clk_enable(struct clk *clk)
-{
-        return 0;
-}
-EXPORT_SYMBOL(clk_enable);
-
-void clk_disable(struct clk *clk)
-{
-}
-EXPORT_SYMBOL(clk_disable);
-
-unsigned long clk_get_rate(struct clk *clk)
-{
-        return clk->rate;
-}
-EXPORT_SYMBOL(clk_get_rate);