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Date: Tue, 24 Nov 2015 17:32:12 +0800
From: Chen-Yu Tsai <wens@...e.org>
To: Maxime Ripard <maxime.ripard@...e-electrons.com>,
Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...eaurora.org>,
Rob Herring <robh+dt@...nel.org>,
Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Ian Campbell <ijc+devicetree@...lion.org.uk>,
Kumar Gala <galak@...eaurora.org>
Cc: Chen-Yu Tsai <wens@...e.org>, linux-clk@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-sunxi@...glegroups.com
Subject: [PATCH v3 1/5] clk: sunxi: Add CLK_OF_DECLARE support for sun8i-a23-apb0-clk driver
The APBS clock on sun9i is the same as the APB0 clock on sun8i. With
sun9i we are supporting the PRCM clocks by using CLK_OF_DECLARE,
instead of through a PRCM mfd device and subdevices for each clock
and reset control. As such we need a CLK_OF_DECLARE version of
the sun8i-a23-apb0-clk driver.
Also, build it for all Allwinner/sunxi platforms, and not just for
configurations with MFD_SUN6I_PRCM enabled.
Signed-off-by: Chen-Yu Tsai <wens@...e.org>
---
drivers/clk/sunxi/Makefile | 4 ++--
drivers/clk/sunxi/clk-sun8i-apb0.c | 43 ++++++++++++++++++++++++++++++++++++++
2 files changed, 45 insertions(+), 2 deletions(-)
diff --git a/drivers/clk/sunxi/Makefile b/drivers/clk/sunxi/Makefile
index cb4c299214ce..121333ce34ea 100644
--- a/drivers/clk/sunxi/Makefile
+++ b/drivers/clk/sunxi/Makefile
@@ -10,11 +10,11 @@ obj-y += clk-a10-pll2.o
obj-y += clk-a20-gmac.o
obj-y += clk-mod0.o
obj-y += clk-simple-gates.o
+obj-y += clk-sun8i-apb0.o
obj-y += clk-sun8i-mbus.o
obj-y += clk-sun9i-core.o
obj-y += clk-sun9i-mmc.o
obj-y += clk-usb.o
obj-$(CONFIG_MFD_SUN6I_PRCM) += \
- clk-sun6i-ar100.o clk-sun6i-apb0.o clk-sun6i-apb0-gates.o \
- clk-sun8i-apb0.o
+ clk-sun6i-ar100.o clk-sun6i-apb0.o clk-sun6i-apb0-gates.o
diff --git a/drivers/clk/sunxi/clk-sun8i-apb0.c b/drivers/clk/sunxi/clk-sun8i-apb0.c
index 7ae5d2c2cde1..11b2f2fde245 100644
--- a/drivers/clk/sunxi/clk-sun8i-apb0.c
+++ b/drivers/clk/sunxi/clk-sun8i-apb0.c
@@ -17,8 +17,51 @@
#include <linux/clk-provider.h>
#include <linux/module.h>
#include <linux/of.h>
+#include <linux/of_address.h>
#include <linux/platform_device.h>
+static void sun8i_a23_apb0_setup(struct device_node *node)
+{
+ const char *clk_name = node->name;
+ const char *clk_parent;
+ void __iomem *reg;
+ struct resource res;
+ struct clk *clk;
+ int ret;
+
+ reg = of_io_request_and_map(node, 0, of_node_full_name(node));
+ if (IS_ERR(reg))
+ return;
+
+ clk_parent = of_clk_get_parent_name(node, 0);
+ if (!clk_parent)
+ goto err_unmap;
+
+ of_property_read_string(node, "clock-output-names", &clk_name);
+
+ /* The A23 APB0 clock is a standard 2 bit wide divider clock */
+ clk = clk_register_divider(NULL, clk_name, clk_parent, 0, reg,
+ 0, 2, CLK_DIVIDER_POWER_OF_TWO, NULL);
+ if (IS_ERR(clk))
+ goto err_unmap;
+
+ ret = of_clk_add_provider(node, of_clk_src_simple_get, clk);
+ if (ret)
+ goto err_unregister;
+
+ return;
+
+err_unregister:
+ clk_unregister_divider(clk);
+
+err_unmap:
+ iounmap(reg);
+ of_address_to_resource(node, 0, &res);
+ release_mem_region(res.start, resource_size(&res));
+}
+CLK_OF_DECLARE(sun8i_a23_apb0, "allwinner,sun8i-a23-apb0-clk",
+ sun8i_a23_apb0_setup);
+
static int sun8i_a23_apb0_clk_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
--
2.6.2
--
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