ARM: tegra: pmc: convert PMC driver to support DT only

The Tegra kernel only support boot from DT now. Clean up the PMC driver
to support DT only, that includes:

* remove the ifdef of CONFIG_OF
* replace the static mapping of PMC addr to map from DT

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

1 files changed, 22 insertions, 29 deletions

diff --git a/arch/arm/mach-tegra/pmc.c b/arch/arm/mach-tegra/pmc.c
index 5d79d34e2c0f..a916ecaa96e6 100644
--- a/arch/arm/mach-tegra/pmc.c
+++ b/arch/arm/mach-tegra/pmc.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
+ * Copyright (C) 2012,2013 NVIDIA CORPORATION. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -18,59 +18,52 @@
 #include <linux/kernel.h>
 #include <linux/io.h>
 #include <linux/of.h>
-
-#include "iomap.h"
+#include <linux/of_address.h>
 
 #define PMC_CTRL                0x0
 #define PMC_CTRL_INTR_LOW       (1 << 17)
 
+static void __iomem *tegra_pmc_base;
+static bool tegra_pmc_invert_interrupt;
+
 static inline u32 tegra_pmc_readl(u32 reg)
 {
-        return readl(IO_ADDRESS(TEGRA_PMC_BASE + reg));
+        return readl(tegra_pmc_base + reg);
 }
 
 static inline void tegra_pmc_writel(u32 val, u32 reg)
 {
-        writel(val, IO_ADDRESS(TEGRA_PMC_BASE + reg));
+        writel(val, tegra_pmc_base + reg);
 }
 
-#ifdef CONFIG_OF
 static const struct of_device_id matches[] __initconst = {
         { .compatible = "nvidia,tegra114-pmc" },
         { .compatible = "nvidia,tegra30-pmc" },
         { .compatible = "nvidia,tegra20-pmc" },
         { }
 };
-#endif
 
-void __init tegra_pmc_init(void)
+static void tegra_pmc_parse_dt(void)
 {
-        /*
-         * For now, Harmony is the only board that uses the PMC, and it wants
-         * the signal inverted. Seaboard would too if it used the PMC.
-         * Hopefully by the time other boards want to use the PMC, everything
-         * will be device-tree, or they also want it inverted.
-         */
-        bool invert_interrupt = true;
-        u32 val;
+        struct device_node *np;
+
+        np = of_find_matching_node(NULL, matches);
+        BUG_ON(!np);
 
-#ifdef CONFIG_OF
-        if (of_have_populated_dt()) {
-                struct device_node *np;
+        tegra_pmc_base = of_iomap(np, 0);
 
-                invert_interrupt = false;
+        tegra_pmc_invert_interrupt = of_property_read_bool(np,
+                                     "nvidia,invert-interrupt");
+}
+
+void __init tegra_pmc_init(void)
+{
+        u32 val;
 
-                np = of_find_matching_node(NULL, matches);
-                if (np) {
-                        if (of_find_property(np, "nvidia,invert-interrupt",
-                                                NULL))
-                                invert_interrupt = true;
-                }
-        }
-#endif
+        tegra_pmc_parse_dt();
 
         val = tegra_pmc_readl(PMC_CTRL);
-        if (invert_interrupt)
+        if (tegra_pmc_invert_interrupt)
                 val |= PMC_CTRL_INTR_LOW;
         else
                 val &= ~PMC_CTRL_INTR_LOW;