v4.19.13 snapshot.
diff --git a/arch/arm/mach-mmp/clock.c b/arch/arm/mach-mmp/clock.c
new file mode 100644
index 0000000..28fe64c
--- /dev/null
+++ b/arch/arm/mach-mmp/clock.c
@@ -0,0 +1,108 @@
+/*
+ * linux/arch/arm/mach-mmp/clock.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/spinlock.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+
+#include "regs-apbc.h"
+#include "clock.h"
+
+static void apbc_clk_enable(struct clk *clk)
+{
+ uint32_t clk_rst;
+
+ clk_rst = APBC_APBCLK | APBC_FNCLK | APBC_FNCLKSEL(clk->fnclksel);
+ __raw_writel(clk_rst, clk->clk_rst);
+}
+
+static void apbc_clk_disable(struct clk *clk)
+{
+ __raw_writel(0, clk->clk_rst);
+}
+
+struct clkops apbc_clk_ops = {
+ .enable = apbc_clk_enable,
+ .disable = apbc_clk_disable,
+};
+
+static void apmu_clk_enable(struct clk *clk)
+{
+ __raw_writel(clk->enable_val, clk->clk_rst);
+}
+
+static void apmu_clk_disable(struct clk *clk)
+{
+ __raw_writel(0, clk->clk_rst);
+}
+
+struct clkops apmu_clk_ops = {
+ .enable = apmu_clk_enable,
+ .disable = apmu_clk_disable,
+};
+
+static DEFINE_SPINLOCK(clocks_lock);
+
+int clk_enable(struct clk *clk)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&clocks_lock, flags);
+ if (clk->enabled++ == 0)
+ clk->ops->enable(clk);
+ spin_unlock_irqrestore(&clocks_lock, flags);
+ return 0;
+}
+EXPORT_SYMBOL(clk_enable);
+
+void clk_disable(struct clk *clk)
+{
+ unsigned long flags;
+
+ if (!clk)
+ return;
+
+ WARN_ON(clk->enabled == 0);
+
+ spin_lock_irqsave(&clocks_lock, flags);
+ if (--clk->enabled == 0)
+ clk->ops->disable(clk);
+ spin_unlock_irqrestore(&clocks_lock, flags);
+}
+EXPORT_SYMBOL(clk_disable);
+
+unsigned long clk_get_rate(struct clk *clk)
+{
+ unsigned long rate;
+
+ if (clk->ops->getrate)
+ rate = clk->ops->getrate(clk);
+ else
+ rate = clk->rate;
+
+ return rate;
+}
+EXPORT_SYMBOL(clk_get_rate);
+
+int clk_set_rate(struct clk *clk, unsigned long rate)
+{
+ unsigned long flags;
+ int ret = -EINVAL;
+
+ if (clk->ops->setrate) {
+ spin_lock_irqsave(&clocks_lock, flags);
+ ret = clk->ops->setrate(clk, rate);
+ spin_unlock_irqrestore(&clocks_lock, flags);
+ }
+
+ return ret;
+}
+EXPORT_SYMBOL(clk_set_rate);