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powerpc/powernv: Add RTC and NVRAM support plus RTAS fallbacks

Sfoglia il codice sorgente 
Implements OPAL RTC and NVRAM support and wire all that up to
the powernv platform.

We use RTAS for RTC as a fallback if available. Using RTAS for nvram
is not supported yet, pending some rework/cleanup and generalization
of the pSeries & CHRP code. We also use RTAS fallbacks for power off
and reboot

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt
2011-09-19 17:45:01 +00:00
parent ec27329ffb
commit 628daa8d5a
5 ha cambiato i file con 230 aggiunte e 22 eliminazioni
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59
arch/powerpc/platforms/powernv/setup.c
Vedi File

@@ -29,7 +29,9 @@
#include <asm/machdep.h>
#include <asm/firmware.h>
#include <asm/xics.h>
#include <asm/rtas.h>
#include <asm/opal.h>
#include <asm/xics.h>
#include "powernv.h"
@@ -40,7 +42,9 @@ static void __init pnv_setup_arch(void)
/* XXX PCI */
/* XXX NVRAM */
/* Setup RTC and NVRAM callbacks */
if (firmware_has_feature(FW_FEATURE_OPAL))
opal_nvram_init();
/* Enable NAP mode */
powersave_nap = 1;
@@ -118,20 +122,6 @@ static void __noreturn pnv_halt(void)
pnv_power_off();
}
static unsigned long __init pnv_get_boot_time(void)
{
return 0;
}
static void pnv_get_rtc_time(struct rtc_time *rtc_tm)
{
}
static int pnv_set_rtc_time(struct rtc_time *tm)
{
return 0;
}
static void pnv_progress(char *s, unsigned short hex)
{
}
@@ -143,6 +133,30 @@ static void pnv_kexec_cpu_down(int crash_shutdown, int secondary)
}
#endif /* CONFIG_KEXEC */
static void __init pnv_setup_machdep_opal(void)
{
ppc_md.get_boot_time = opal_get_boot_time;
ppc_md.get_rtc_time = opal_get_rtc_time;
ppc_md.set_rtc_time = opal_set_rtc_time;
ppc_md.restart = pnv_restart;
ppc_md.power_off = pnv_power_off;
ppc_md.halt = pnv_halt;
}
#ifdef CONFIG_PPC_POWERNV_RTAS
static void __init pnv_setup_machdep_rtas(void)
{
if (rtas_token("get-time-of-day") != RTAS_UNKNOWN_SERVICE) {
ppc_md.get_boot_time = rtas_get_boot_time;
ppc_md.get_rtc_time = rtas_get_rtc_time;
ppc_md.set_rtc_time = rtas_set_rtc_time;
}
ppc_md.restart = rtas_restart;
ppc_md.power_off = rtas_power_off;
ppc_md.halt = rtas_halt;
}
#endif /* CONFIG_PPC_POWERNV_RTAS */
static int __init pnv_probe(void)
{
unsigned long root = of_get_flat_dt_root();
@@ -152,6 +166,13 @@ static int __init pnv_probe(void)
hpte_init_native();
if (firmware_has_feature(FW_FEATURE_OPAL))
pnv_setup_machdep_opal();
#ifdef CONFIG_PPC_POWERNV_RTAS
else if (rtas.base)
pnv_setup_machdep_rtas();
#endif /* CONFIG_PPC_POWERNV_RTAS */
pr_debug("PowerNV detected !\n");
return 1;
@@ -160,16 +181,10 @@ static int __init pnv_probe(void)
define_machine(powernv) {
.name = "PowerNV",
.probe = pnv_probe,
.setup_arch = pnv_setup_arch,
.init_early = pnv_init_early,
.setup_arch = pnv_setup_arch,
.init_IRQ = pnv_init_IRQ,
.show_cpuinfo = pnv_show_cpuinfo,
.restart = pnv_restart,
.power_off = pnv_power_off,
.halt = pnv_halt,
.get_boot_time = pnv_get_boot_time,
.get_rtc_time = pnv_get_rtc_time,
.set_rtc_time = pnv_set_rtc_time,
.progress = pnv_progress,
.power_save = power7_idle,
.calibrate_decr = generic_calibrate_decr,