clk: vt8500: parse pmc_base from clock driver (f9e4a18d) · Commits · 戴 / test

drivers/clk/clk-vt8500.c

+24 −0

Original line number	Diff line number	Diff line
		@@ -15,11 +15,14 @@

		#include <linux/io.h>
		#include <linux/of.h>
		#include <linux/of_address.h>
		#include <linux/slab.h>
		#include <linux/bitops.h>
		#include <linux/clkdev.h>
		#include <linux/clk-provider.h>

		#define LEGACY_PMC_BASE 0xD8130000

		/* All clocks share the same lock as none can be changed concurrently */
		static DEFINE_SPINLOCK(_lock);

		@@ -53,6 +56,21 @@ struct clk_pll {

		static void __iomem *pmc_base;

		static __init void vtwm_set_pmc_base(void)
		{
		struct device_node *np =
		of_find_compatible_node(NULL, NULL, "via,vt8500-pmc");

		if (np)
		pmc_base = of_iomap(np, 0);
		else
		pmc_base = ioremap(LEGACY_PMC_BASE, 0x1000);
		of_node_put(np);

		if (!pmc_base)
		pr_err("%s:of_iomap(pmc) failed\n", __func__);
		}

		#define to_clk_device(_hw) container_of(_hw, struct clk_device, hw)

		#define VT8500_PMC_BUSY_MASK 0x18
		@@ -222,6 +240,9 @@ static __init void vtwm_device_clk_init(struct device_node *node)
		int rc;
		int clk_init_flags = 0;

		if (!pmc_base)
		vtwm_set_pmc_base();

		dev_clk = kzalloc(sizeof(*dev_clk), GFP_KERNEL);
		if (WARN_ON(!dev_clk))
		return;
		@@ -636,6 +657,9 @@ static __init void vtwm_pll_clk_init(struct device_node *node, int pll_type)
		struct clk_init_data init;
		int rc;

		if (!pmc_base)
		vtwm_set_pmc_base();

		rc = of_property_read_u32(node, "reg", &reg);
		if (WARN_ON(rc))
		return;