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Diffstat (limited to 'arch/arm/mach-zynq/slcr.c')
-rw-r--r--arch/arm/mach-zynq/slcr.c45
1 files changed, 17 insertions, 28 deletions
diff --git a/arch/arm/mach-zynq/slcr.c b/arch/arm/mach-zynq/slcr.c
index 50d008d..1836d5a 100644
--- a/arch/arm/mach-zynq/slcr.c
+++ b/arch/arm/mach-zynq/slcr.c
@@ -14,32 +14,21 @@
* 02139, USA.
*/
-#include <linux/export.h>
#include <linux/io.h>
-#include <linux/fs.h>
-#include <linux/interrupt.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
#include <linux/of_address.h>
-#include <linux/uaccess.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/string.h>
#include <linux/clk/zynq.h>
#include "common.h"
-#define SLCR_UNLOCK_MAGIC 0xDF0D
-#define SLCR_UNLOCK 0x8 /* SCLR unlock register */
-
+/* register offsets */
+#define SLCR_UNLOCK_OFFSET 0x8 /* SCLR unlock register */
#define SLCR_PS_RST_CTRL_OFFSET 0x200 /* PS Software Reset Control */
+#define SLCR_A9_CPU_RST_CTRL_OFFSET 0x244 /* CPU Software Reset Control */
+#define SLCR_REBOOT_STATUS_OFFSET 0x258 /* PS Reboot Status */
+#define SLCR_UNLOCK_MAGIC 0xDF0D
#define SLCR_A9_CPU_CLKSTOP 0x10
#define SLCR_A9_CPU_RST 0x1
-#define SLCR_A9_CPU_RST_CTRL 0x244 /* CPU Software Reset Control */
-#define SLCR_REBOOT_STATUS 0x258 /* PS Reboot Status */
-
void __iomem *zynq_slcr_base;
/**
@@ -54,15 +43,15 @@ void zynq_slcr_system_reset(void)
* Note that this seems to require raw i/o
* functions or there's a lockup?
*/
- writel(SLCR_UNLOCK_MAGIC, zynq_slcr_base + SLCR_UNLOCK);
+ writel(SLCR_UNLOCK_MAGIC, zynq_slcr_base + SLCR_UNLOCK_OFFSET);
/*
* Clear 0x0F000000 bits of reboot status register to workaround
* the FSBL not loading the bitstream after soft-reboot
* This is a temporary solution until we know more.
*/
- reboot = readl(zynq_slcr_base + SLCR_REBOOT_STATUS);
- writel(reboot & 0xF0FFFFFF, zynq_slcr_base + SLCR_REBOOT_STATUS);
+ reboot = readl(zynq_slcr_base + SLCR_REBOOT_STATUS_OFFSET);
+ writel(reboot & 0xF0FFFFFF, zynq_slcr_base + SLCR_REBOOT_STATUS_OFFSET);
writel(1, zynq_slcr_base + SLCR_PS_RST_CTRL_OFFSET);
}
@@ -72,11 +61,11 @@ void zynq_slcr_system_reset(void)
*/
void zynq_slcr_cpu_start(int cpu)
{
- /* enable CPUn */
- writel(SLCR_A9_CPU_CLKSTOP << cpu,
- zynq_slcr_base + SLCR_A9_CPU_RST_CTRL);
- /* enable CLK for CPUn */
- writel(0x0 << cpu, zynq_slcr_base + SLCR_A9_CPU_RST_CTRL);
+ u32 reg = readl(zynq_slcr_base + SLCR_A9_CPU_RST_CTRL_OFFSET);
+ reg &= ~(SLCR_A9_CPU_RST << cpu);
+ writel(reg, zynq_slcr_base + SLCR_A9_CPU_RST_CTRL_OFFSET);
+ reg &= ~(SLCR_A9_CPU_CLKSTOP << cpu);
+ writel(reg, zynq_slcr_base + SLCR_A9_CPU_RST_CTRL_OFFSET);
}
/**
@@ -85,9 +74,9 @@ void zynq_slcr_cpu_start(int cpu)
*/
void zynq_slcr_cpu_stop(int cpu)
{
- /* stop CLK and reset CPUn */
- writel((SLCR_A9_CPU_CLKSTOP | SLCR_A9_CPU_RST) << cpu,
- zynq_slcr_base + SLCR_A9_CPU_RST_CTRL);
+ u32 reg = readl(zynq_slcr_base + SLCR_A9_CPU_RST_CTRL_OFFSET);
+ reg |= (SLCR_A9_CPU_CLKSTOP | SLCR_A9_CPU_RST) << cpu;
+ writel(reg, zynq_slcr_base + SLCR_A9_CPU_RST_CTRL_OFFSET);
}
/**
@@ -113,7 +102,7 @@ int __init zynq_slcr_init(void)
}
/* unlock the SLCR so that registers can be changed */
- writel(SLCR_UNLOCK_MAGIC, zynq_slcr_base + SLCR_UNLOCK);
+ writel(SLCR_UNLOCK_MAGIC, zynq_slcr_base + SLCR_UNLOCK_OFFSET);
pr_info("%s mapped to %p\n", np->name, zynq_slcr_base);
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