clk: davinci: da850-pll: change PLL0 to CLK_OF_DECLARE

PLL0 on davinci/da850-type device needs to be registered early in boot
because it is needed for clocksource/clockevent. Change the driver
to use CLK_OF_DECLARE for this special case.

Reviewed-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: David Lechner <david@lechnology.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20180525181150.17873-8-david@lechnology.com

3 files changed, 21 insertions, 6 deletions

diff --git a/drivers/clk/davinci/pll-da850.c b/drivers/clk/davinci/pll-da850.c
index 59cc2e3733f9..0f7198191ea2 100644
--- a/drivers/clk/davinci/pll-da850.c
+++ b/drivers/clk/davinci/pll-da850.c
@@ -13,6 +13,8 @@
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/mfd/da8xx-cfgchip.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_address.h>
 #include <linux/of.h>
 #include <linux/types.h>
 
@@ -136,11 +138,22 @@ static const struct davinci_pll_sysclk_info *da850_pll0_sysclk_info[] = {
         NULL
 };
 
-int of_da850_pll0_init(struct device *dev, void __iomem *base, struct regmap *cfgchip)
+void of_da850_pll0_init(struct device_node *node)
 {
-        return of_davinci_pll_init(dev, dev->of_node, &da850_pll0_info,
-                                   &da850_pll0_obsclk_info,
-                                   da850_pll0_sysclk_info, 7, base, cfgchip);
+        void __iomem *base;
+        struct regmap *cfgchip;
+
+        base = of_iomap(node, 0);
+        if (!base) {
+                pr_err("%s: ioremap failed\n", __func__);
+                return;
+        }
+
+        cfgchip = syscon_regmap_lookup_by_compatible("ti,da830-cfgchip");
+
+        of_davinci_pll_init(NULL, node, &da850_pll0_info,
+                            &da850_pll0_obsclk_info,
+                            da850_pll0_sysclk_info, 7, base, cfgchip);
 }
 
 static const struct davinci_pll_clk_info da850_pll1_info = {
diff --git a/drivers/clk/davinci/pll.c b/drivers/clk/davinci/pll.c
index 2eb981e61185..84a343060bc8 100644
--- a/drivers/clk/davinci/pll.c
+++ b/drivers/clk/davinci/pll.c
@@ -859,8 +859,10 @@ static struct davinci_pll_platform_data *davinci_pll_get_pdata(struct device *de
         return pdata;
 }
 
+/* needed in early boot for clocksource/clockevent */
+CLK_OF_DECLARE(da850_pll0, "ti,da850-pll0", of_da850_pll0_init);
+
 static const struct of_device_id davinci_pll_of_match[] = {
-        { .compatible = "ti,da850-pll0", .data = of_da850_pll0_init },
         { .compatible = "ti,da850-pll1", .data = of_da850_pll1_init },
         { }
 };
diff --git a/drivers/clk/davinci/pll.h b/drivers/clk/davinci/pll.h
index 562652fc0759..b2e5c4496645 100644
--- a/drivers/clk/davinci/pll.h
+++ b/drivers/clk/davinci/pll.h
@@ -123,7 +123,7 @@ int of_davinci_pll_init(struct device *dev, struct device_node *node,
 /* Platform-specific callbacks */
 
 int da850_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip);
-int of_da850_pll0_init(struct device *dev, void __iomem *base, struct regmap *cfgchip);
+void of_da850_pll0_init(struct device_node *node);
 int of_da850_pll1_init(struct device *dev, void __iomem *base, struct regmap *cfgchip);
 
 int dm355_pll2_init(struct device *dev, void __iomem *base, struct regmap *cfgchip);