Add reset module registers representation and
machine restart callback for mpc5121 platform.
Signed-off-by: Piotr Ziecik <ko...@semihalf.com>
Signed-off-by: Wolfgang Denk <w...@denx.de>
Signed-off-by: Anatolij Gustschin <ag...@denx.de>
Cc: Grant Likely <grant.lik...@secretlab.ca>
Cc: John Rigby <jcri...@gmail.com>
---
Changes since v2:
- call mpc512x_restart_init() explicitely from platform
init code
Changes since v1:
- use 'struct mpc512x_reset_module *' type for 'reset_module_base'
- remove empty line
- remove leftover colon and use pr_err() instead of printk.
arch/powerpc/include/asm/mpc5xxx.h | 14 +++++++++-
arch/powerpc/platforms/512x/mpc5121_ads.c | 1 +
arch/powerpc/platforms/512x/mpc5121_generic.c | 1 +
arch/powerpc/platforms/512x/mpc512x.h | 1 +
arch/powerpc/platforms/512x/mpc512x_shared.c | 34 +++++++++++++++++++++++++
5 files changed, 50 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/include/asm/mpc5xxx.h
b/arch/powerpc/include/asm/mpc5xxx.h
index 5ce9c5f..0004986 100644
--- a/arch/powerpc/include/asm/mpc5xxx.h
+++ b/arch/powerpc/include/asm/mpc5xxx.h
@@ -18,5 +18,17 @@
extern unsigned long mpc5xxx_get_bus_frequency(struct device_node *node);
-#endif /* __ASM_POWERPC_MPC5xxx_H__ */
+/* MPC512x Reset module registers */
+struct mpc512x_reset_module {
+ u32 rcwlr; /* Reset Configuration Word Low Register */
+ u32 rcwhr; /* Reset Configuration Word High Register */
+ u32 reserved1;
+ u32 reserved2;
+ u32 rsr; /* Reset Status Register */
+ u32 rmr; /* Reset Mode Register */
+ u32 rpr; /* Reset Protection Register */
+ u32 rcr; /* Reset Control Register */
+ u32 rcer; /* Reset Control Enable Register */
+};
+#endif /* __ASM_POWERPC_MPC5xxx_H__ */
diff --git a/arch/powerpc/platforms/512x/mpc5121_ads.c
b/arch/powerpc/platforms/512x/mpc5121_ads.c
index 0f8f2e9..ee6ae12 100644
--- a/arch/powerpc/platforms/512x/mpc5121_ads.c
+++ b/arch/powerpc/platforms/512x/mpc5121_ads.c
@@ -68,4 +68,5 @@ define_machine(mpc5121_ads) {
.init_IRQ = mpc5121_ads_init_IRQ,
.get_irq = ipic_get_irq,
.calibrate_decr = generic_calibrate_decr,
+ .restart = mpc512x_restart,
};
diff --git a/arch/powerpc/platforms/512x/mpc5121_generic.c
b/arch/powerpc/platforms/512x/mpc5121_generic.c
index 9b8c9b0..a6c0e3a 100644
--- a/arch/powerpc/platforms/512x/mpc5121_generic.c
+++ b/arch/powerpc/platforms/512x/mpc5121_generic.c
@@ -55,4 +55,5 @@ define_machine(mpc5121_generic) {
.init_IRQ = mpc512x_init_IRQ,
.get_irq = ipic_get_irq,
.calibrate_decr = generic_calibrate_decr,
+ .restart = mpc512x_restart,
};
diff --git a/arch/powerpc/platforms/512x/mpc512x.h
b/arch/powerpc/platforms/512x/mpc512x.h
index ac3da1a..b2daca0 100644
--- a/arch/powerpc/platforms/512x/mpc512x.h
+++ b/arch/powerpc/platforms/512x/mpc512x.h
@@ -15,4 +15,5 @@ extern void __init mpc512x_init_IRQ(void);
extern void __init mpc512x_init(void);
extern int __init mpc5121_clk_init(void);
void __init mpc512x_declare_of_platform_devices(void);
+extern void mpc512x_restart(char *cmd);
#endif /* __MPC512X_H__ */
diff --git a/arch/powerpc/platforms/512x/mpc512x_shared.c
b/arch/powerpc/platforms/512x/mpc512x_shared.c
index b683165..ac0400e 100644
--- a/arch/powerpc/platforms/512x/mpc512x_shared.c
+++ b/arch/powerpc/platforms/512x/mpc512x_shared.c
@@ -21,9 +21,42 @@
#include <asm/ipic.h>
#include <asm/prom.h>
#include <asm/time.h>
+#include <asm/mpc5xxx.h>
#include "mpc512x.h"
+static struct mpc512x_reset_module __iomem *reset_module_base;
+
+static int __init mpc512x_restart_init(void)
+{
+ struct device_node *np;
+
+ np = of_find_compatible_node(NULL, NULL, "fsl,mpc5121-reset");
+ if (!np)
+ return -1;
+
+ reset_module_base = of_iomap(np, 0);
+ of_node_put(np);
+
+ return 0;
+}
+
+void mpc512x_restart(char *cmd)
+{
+ struct mpc512x_reset_module *rm = reset_module_base;
+
+ if (rm) {
+ /* Enable software reset "RSTE" */
+ out_be32(&rm->rpr, 0x52535445);
+ /* Set software hard reset */
+ out_be32(&rm->rcr, 0x2);
+ } else {
+ pr_err("Restart module not mapped.\n");
+ }
+ for (;;)
+ ;
+}
+
void __init mpc512x_init_IRQ(void)
{
struct device_node *np;
@@ -62,4 +95,5 @@ void __init mpc512x_init(void)
{
mpc512x_declare_of_platform_devices();
mpc5121_clk_init();
+ mpc512x_restart_init();
}
--
1.6.3.3
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