powerpc/chrp: Use the same RTAS daemon as pSeries

The CHRP code has some fishy timer based code to scan the RTAS event
log, which uses a 1KB stack buffer and doesn't even use the results.

The pSeries code as a nicer daemon that allows userspace to read the
event log and basically uses the same RTAS interface

This patch moves rtasd.c out of platform/pseries and makes it usable
by CHRP, after removing the old crufty event log mechanism in there.

The nvram logging part of the daemon is still only available on 64-bit
since the underlying nvram management routines aren't currently shared.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

2 files changed, 2 insertions, 50 deletions

diff --git a/arch/powerpc/platforms/chrp/Kconfig b/arch/powerpc/platforms/chrp/Kconfig
index 37d438bd5b7a..bc0b0efdc5fe 100644
--- a/arch/powerpc/platforms/chrp/Kconfig
+++ b/arch/powerpc/platforms/chrp/Kconfig
@@ -5,6 +5,8 @@ config PPC_CHRP
         select PPC_I8259
         select PPC_INDIRECT_PCI
         select PPC_RTAS
+        select PPC_RTAS_DAEMON
+        select RTAS_ERROR_LOGGING
         select PPC_MPC106
         select PPC_UDBG_16550
         select PPC_NATIVE
diff --git a/arch/powerpc/platforms/chrp/setup.c b/arch/powerpc/platforms/chrp/setup.c
index cd4ad9aea760..52f3df3b4ca0 100644
--- a/arch/powerpc/platforms/chrp/setup.c
+++ b/arch/powerpc/platforms/chrp/setup.c
@@ -364,19 +364,6 @@ void __init chrp_setup_arch(void)
         if (ppc_md.progress) ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0x0);
 }
 
-void
-chrp_event_scan(unsigned long unused)
-{
-        unsigned char log[1024];
-        int ret = 0;
-
-        /* XXX: we should loop until the hardware says no more error logs -- Cort */
-        rtas_call(rtas_token("event-scan"), 4, 1, &ret, 0xffffffff, 0,
-                  __pa(log), 1024);
-        mod_timer(&__get_cpu_var(heartbeat_timer),
-                  jiffies + event_scan_interval);
-}
-
 static void chrp_8259_cascade(unsigned int irq, struct irq_desc *desc)
 {
         unsigned int cascade_irq = i8259_irq();
@@ -568,9 +555,6 @@ void __init chrp_init_IRQ(void)
 void __init
 chrp_init2(void)
 {
-        struct device_node *device;
-        const unsigned int *p = NULL;
-
 #ifdef CONFIG_NVRAM
         chrp_nvram_init();
 #endif
@@ -582,40 +566,6 @@ chrp_init2(void)
         request_region(0x80,0x10,"dma page reg");
         request_region(0xc0,0x20,"dma2");
 
-        /* Get the event scan rate for the rtas so we know how
-         * often it expects a heartbeat. -- Cort
-         */
-        device = of_find_node_by_name(NULL, "rtas");
-        if (device)
-                p = of_get_property(device, "rtas-event-scan-rate", NULL);
-        if (p && *p) {
-                /*
-                 * Arrange to call chrp_event_scan at least *p times
-                 * per minute.  We use 59 rather than 60 here so that
-                 * the rate will be slightly higher than the minimum.
-                 * This all assumes we don't do hotplug CPU on any
-                 * machine that needs the event scans done.
-                 */
-                unsigned long interval, offset;
-                int cpu, ncpus;
-                struct timer_list *timer;
-
-                interval = HZ * 59 / *p;
-                offset = HZ;
-                ncpus = num_online_cpus();
-                event_scan_interval = ncpus * interval;
-                for (cpu = 0; cpu < ncpus; ++cpu) {
-                        timer = &per_cpu(heartbeat_timer, cpu);
-                        setup_timer(timer, chrp_event_scan, 0);
-                        timer->expires = jiffies + offset;
-                        add_timer_on(timer, cpu);
-                        offset += interval;
-                }
-                printk("RTAS Event Scan Rate: %u (%lu jiffies)\n",
-                       *p, interval);
-        }
-        of_node_put(device);
-
         if (ppc_md.progress)
                 ppc_md.progress("  Have fun!    ", 0x7777);
 }