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clk: sunxi: Make the mod0 clk driver also a platform driver

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With the prcm in sun6i (and some later SoCs) some mod0 clocks are instantiated
through the mfd framework, and as such do not work with of_clk_declare, since
they do not have registers assigned to them yet at of_clk_declare init time.

Silence the error on not finding registers in the of_clk_declare mod0 clk
setup method, and also register mod0-clk support as a platform driver to work
properly with mfd instantiated mod0 clocks.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
This commit is contained in:
Hans de Goede 2014-12-20 11:36:49 +01:00 committed by Maxime Ripard
parent 66e79cf17e
commit 6ea3953da4
1 changed files with 40 additions and 3 deletions
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43
drivers/clk/sunxi/clk-mod0.c
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@ -17,6 +17,7 @@
#include <linux/clk-provider.h>
#include <linux/clkdev.h>
#include <linux/of_address.h>
#include <linux/platform_device.h>
#include "clk-factors.h"
@ -67,7 +68,7 @@ static struct clk_factors_config sun4i_a10_mod0_config = {
.pwidth = 2,
};
static const struct factors_data sun4i_a10_mod0_data __initconst = {
static const struct factors_data sun4i_a10_mod0_data = {
.enable = 31,
.mux = 24,
.muxmask = BIT(1) | BIT(0),
@ -83,8 +84,11 @@ static void __init sun4i_a10_mod0_setup(struct device_node *node)
reg = of_iomap(node, 0);
if (!reg) {
pr_err("Could not get registers for mod0-clk: %s\n",
node->name);
/*
* This happens with mod0 clk nodes instantiated through
* mfd, as those do not have their resources assigned at
* CLK_OF_DECLARE time yet, so do not print an error.
*/
return;
}
@ -93,6 +97,39 @@ static void __init sun4i_a10_mod0_setup(struct device_node *node)
}
CLK_OF_DECLARE(sun4i_a10_mod0, "allwinner,sun4i-a10-mod0-clk", sun4i_a10_mod0_setup);
static int sun4i_a10_mod0_clk_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct resource *r;
void __iomem *reg;
if (!np)
return -ENODEV;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
reg = devm_ioremap_resource(&pdev->dev, r);
if (IS_ERR(reg))
return PTR_ERR(reg);
sunxi_factors_register(np, &sun4i_a10_mod0_data,
&sun4i_a10_mod0_lock, reg);
return 0;
}
static const struct of_device_id sun4i_a10_mod0_clk_dt_ids[] = {
{ .compatible = "allwinner,sun4i-a10-mod0-clk" },
{ /* sentinel */ }
};
static struct platform_driver sun4i_a10_mod0_clk_driver = {
.driver = {
.name = "sun4i-a10-mod0-clk",
.of_match_table = sun4i_a10_mod0_clk_dt_ids,
},
.probe = sun4i_a10_mod0_clk_probe,
};
module_platform_driver(sun4i_a10_mod0_clk_driver);
static DEFINE_SPINLOCK(sun5i_a13_mbus_lock);
static void __init sun5i_a13_mbus_setup(struct device_node *node)