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@xxxxxxxxxx>
---
V2:
* removing the change from readl_relaxed back to readl, same with the
write function
* adding a BUG() when there is no PMC node in DT
* removeing the redundancy of_have_populated_dt() check
---
arch/arm/mach-tegra/pmc.c | 54 ++++++++++++++++++++++-------------------------
1 file changed, 25 insertions(+), 29 deletions(-)
diff --git a/arch/arm/mach-tegra/pmc.c b/arch/arm/mach-tegra/pmc.c
index 5d79d34..f7d63ab 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 +18,55 @@
#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;
-
-#ifdef CONFIG_OF
- if (of_have_populated_dt()) {
- struct device_node *np;
+ struct device_node *np;
- invert_interrupt = false;
+ np = of_find_matching_node(NULL, matches);
+ if (np) {
+ tegra_pmc_base = of_iomap(np, 0);
- np = of_find_matching_node(NULL, matches);
- if (np) {
- if (of_find_property(np, "nvidia,invert-interrupt",
- NULL))
- invert_interrupt = true;
- }
+ tegra_pmc_invert_interrupt = of_property_read_bool(np,
+ "nvidia,invert-interrupt");
+ } else {
+ /* Should not be here, the PMC DT node should always exist. */
+ BUG();
}
-#endif
+}
+
+void __init tegra_pmc_init(void)
+{
+ u32 val;
+
+ 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;
--
1.8.1.1
--
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