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@xxxxxxxxxx>
---
drivers/clk/sunxi/clk-mod0.c | 41 ++++++++++++++++++++++++++++++++++++-----
1 file changed, 36 insertions(+), 5 deletions(-)
diff --git a/drivers/clk/sunxi/clk-mod0.c b/drivers/clk/sunxi/clk-mod0.c
index 658d74f..7ddab6f 100644
--- a/drivers/clk/sunxi/clk-mod0.c
+++ b/drivers/clk/sunxi/clk-mod0.c
@@ -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),
@@ -82,17 +83,47 @@ static void __init sun4i_a10_mod0_setup(struct device_node *node)
void __iomem *reg;
reg = of_iomap(node, 0);
- if (!reg) {
- pr_err("Could not get registers for mod0-clk: %s\n",
- node->name);
+ if (!reg)
return;
- }
sunxi_factors_register(node, &sun4i_a10_mod0_data,
&sun4i_a10_mod0_lock, reg);
}
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)
--
2.1.0
--
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