linux-kernel - [PATCH] arch: nios2: Enable the common clk subsystem on Nios2

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Date:   Fri, 6 Mar 2020 15:44:27 +0200
From:   Beniamin Bia <beniamin.bia@...log.com>
To:     <nios2-dev@...ts.rocketboards.org>
CC:     <ley.foon.tan@...el.com>, <biabeniamin@...look.com>,
        <linux-kernel@...r.kernel.org>,
        Dragos Bogdan <dragos.bogdan@...log.com>,
        Beniamin Bia <beniamin.bia@...log.com>
Subject: [PATCH] arch: nios2: Enable the common clk subsystem on Nios2

From: Dragos Bogdan <dragos.bogdan@...log.com>

This patch adds support for common clock framework on Nios2. Clock
framework is commonly used in many drivers, and this patch makes it
available for the entire architecture, not just on a per-driver basis.

Signed-off-by: Beniamin Bia <beniamin.bia@...log.com>
Signed-off-by: Dragos Bogdan <dragos.bogdan@...log.com>
---
 arch/nios2/Kconfig             | 1 +
 arch/nios2/platform/platform.c | 8 ++++++++
 2 files changed, 9 insertions(+)

diff --git a/arch/nios2/Kconfig b/arch/nios2/Kconfig
index 44b5da37e8bd..4b7c951e80e2 100644
--- a/arch/nios2/Kconfig
+++ b/arch/nios2/Kconfig
@@ -6,6 +6,7 @@ config NIOS2
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
 	select ARCH_HAS_UNCACHED_SEGMENT
 	select ARCH_NO_SWAP
+	select COMMON_CLK
 	select TIMER_OF
 	select GENERIC_ATOMIC64
 	select GENERIC_CLOCKEVENTS
diff --git a/arch/nios2/platform/platform.c b/arch/nios2/platform/platform.c
index 2a35154ca153..9737a87121fa 100644
--- a/arch/nios2/platform/platform.c
+++ b/arch/nios2/platform/platform.c
@@ -15,6 +15,12 @@
 #include <linux/slab.h>
 #include <linux/sys_soc.h>
 #include <linux/io.h>
+#include <linux/clk-provider.h>
+
+static const struct of_device_id clk_match[] __initconst = {
+	{ .compatible = "fixed-clock", .data = of_fixed_clk_setup, },
+	{}
+};
 
 static int __init nios2_soc_device_init(void)
 {
@@ -38,6 +44,8 @@ static int __init nios2_soc_device_init(void)
 		}
 	}
 
+	of_clk_init(clk_match);
+
 	return 0;
 }
 
-- 
2.17.1