linux/arch/powerpc/kernel/rtas-proc.c
Russell Currey 57ad583f20 powerpc: Use octal numbers for file permissions
Symbolic macros are unintuitive and hard to read, whereas octal constants
are much easier to interpret.  Replace macros for the basic permission
flags (user/group/other read/write/execute) with numeric constants
instead, across the whole powerpc tree.

Introducing a significant number of changes across the tree for no runtime
benefit isn't exactly desirable, but so long as these macros are still
used in the tree people will keep sending patches that add them.  Not only
are they hard to parse at a glance, there are multiple ways of coming to
the same value (as you can see with 0444 and 0644 in this patch) which
hurts readability.

Signed-off-by: Russell Currey <ruscur@russell.cc>
Reviewed-by: Cyril Bur <cyrilbur@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-01-22 05:48:33 +11:00

790 lines
22 KiB
C

// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) 2000 Tilmann Bitterberg
* (tilmann@bitterberg.de)
*
* RTAS (Runtime Abstraction Services) stuff
* Intention is to provide a clean user interface
* to use the RTAS.
*
* TODO:
* Split off a header file and maybe move it to a different
* location. Write Documentation on what the /proc/rtas/ entries
* actually do.
*/
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/proc_fs.h>
#include <linux/stat.h>
#include <linux/ctype.h>
#include <linux/time.h>
#include <linux/string.h>
#include <linux/init.h>
#include <linux/seq_file.h>
#include <linux/bitops.h>
#include <linux/rtc.h>
#include <linux/uaccess.h>
#include <asm/processor.h>
#include <asm/io.h>
#include <asm/prom.h>
#include <asm/rtas.h>
#include <asm/machdep.h> /* for ppc_md */
#include <asm/time.h>
/* Token for Sensors */
#define KEY_SWITCH 0x0001
#define ENCLOSURE_SWITCH 0x0002
#define THERMAL_SENSOR 0x0003
#define LID_STATUS 0x0004
#define POWER_SOURCE 0x0005
#define BATTERY_VOLTAGE 0x0006
#define BATTERY_REMAINING 0x0007
#define BATTERY_PERCENTAGE 0x0008
#define EPOW_SENSOR 0x0009
#define BATTERY_CYCLESTATE 0x000a
#define BATTERY_CHARGING 0x000b
/* IBM specific sensors */
#define IBM_SURVEILLANCE 0x2328 /* 9000 */
#define IBM_FANRPM 0x2329 /* 9001 */
#define IBM_VOLTAGE 0x232a /* 9002 */
#define IBM_DRCONNECTOR 0x232b /* 9003 */
#define IBM_POWERSUPPLY 0x232c /* 9004 */
/* Status return values */
#define SENSOR_CRITICAL_HIGH 13
#define SENSOR_WARNING_HIGH 12
#define SENSOR_NORMAL 11
#define SENSOR_WARNING_LOW 10
#define SENSOR_CRITICAL_LOW 9
#define SENSOR_SUCCESS 0
#define SENSOR_HW_ERROR -1
#define SENSOR_BUSY -2
#define SENSOR_NOT_EXIST -3
#define SENSOR_DR_ENTITY -9000
/* Location Codes */
#define LOC_SCSI_DEV_ADDR 'A'
#define LOC_SCSI_DEV_LOC 'B'
#define LOC_CPU 'C'
#define LOC_DISKETTE 'D'
#define LOC_ETHERNET 'E'
#define LOC_FAN 'F'
#define LOC_GRAPHICS 'G'
/* reserved / not used 'H' */
#define LOC_IO_ADAPTER 'I'
/* reserved / not used 'J' */
#define LOC_KEYBOARD 'K'
#define LOC_LCD 'L'
#define LOC_MEMORY 'M'
#define LOC_NV_MEMORY 'N'
#define LOC_MOUSE 'O'
#define LOC_PLANAR 'P'
#define LOC_OTHER_IO 'Q'
#define LOC_PARALLEL 'R'
#define LOC_SERIAL 'S'
#define LOC_DEAD_RING 'T'
#define LOC_RACKMOUNTED 'U' /* for _u_nit is rack mounted */
#define LOC_VOLTAGE 'V'
#define LOC_SWITCH_ADAPTER 'W'
#define LOC_OTHER 'X'
#define LOC_FIRMWARE 'Y'
#define LOC_SCSI 'Z'
/* Tokens for indicators */
#define TONE_FREQUENCY 0x0001 /* 0 - 1000 (HZ)*/
#define TONE_VOLUME 0x0002 /* 0 - 100 (%) */
#define SYSTEM_POWER_STATE 0x0003
#define WARNING_LIGHT 0x0004
#define DISK_ACTIVITY_LIGHT 0x0005
#define HEX_DISPLAY_UNIT 0x0006
#define BATTERY_WARNING_TIME 0x0007
#define CONDITION_CYCLE_REQUEST 0x0008
#define SURVEILLANCE_INDICATOR 0x2328 /* 9000 */
#define DR_ACTION 0x2329 /* 9001 */
#define DR_INDICATOR 0x232a /* 9002 */
/* 9003 - 9004: Vendor specific */
/* 9006 - 9999: Vendor specific */
/* other */
#define MAX_SENSORS 17 /* I only know of 17 sensors */
#define MAX_LINELENGTH 256
#define SENSOR_PREFIX "ibm,sensor-"
#define cel_to_fahr(x) ((x*9/5)+32)
struct individual_sensor {
unsigned int token;
unsigned int quant;
};
struct rtas_sensors {
struct individual_sensor sensor[MAX_SENSORS];
unsigned int quant;
};
/* Globals */
static struct rtas_sensors sensors;
static struct device_node *rtas_node = NULL;
static unsigned long power_on_time = 0; /* Save the time the user set */
static char progress_led[MAX_LINELENGTH];
static unsigned long rtas_tone_frequency = 1000;
static unsigned long rtas_tone_volume = 0;
/* ****************************************************************** */
/* Declarations */
static int ppc_rtas_sensors_show(struct seq_file *m, void *v);
static int ppc_rtas_clock_show(struct seq_file *m, void *v);
static ssize_t ppc_rtas_clock_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos);
static int ppc_rtas_progress_show(struct seq_file *m, void *v);
static ssize_t ppc_rtas_progress_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos);
static int ppc_rtas_poweron_show(struct seq_file *m, void *v);
static ssize_t ppc_rtas_poweron_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos);
static ssize_t ppc_rtas_tone_freq_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos);
static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v);
static ssize_t ppc_rtas_tone_volume_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos);
static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v);
static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v);
static int sensors_open(struct inode *inode, struct file *file)
{
return single_open(file, ppc_rtas_sensors_show, NULL);
}
static const struct file_operations ppc_rtas_sensors_operations = {
.open = sensors_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int poweron_open(struct inode *inode, struct file *file)
{
return single_open(file, ppc_rtas_poweron_show, NULL);
}
static const struct file_operations ppc_rtas_poweron_operations = {
.open = poweron_open,
.read = seq_read,
.llseek = seq_lseek,
.write = ppc_rtas_poweron_write,
.release = single_release,
};
static int progress_open(struct inode *inode, struct file *file)
{
return single_open(file, ppc_rtas_progress_show, NULL);
}
static const struct file_operations ppc_rtas_progress_operations = {
.open = progress_open,
.read = seq_read,
.llseek = seq_lseek,
.write = ppc_rtas_progress_write,
.release = single_release,
};
static int clock_open(struct inode *inode, struct file *file)
{
return single_open(file, ppc_rtas_clock_show, NULL);
}
static const struct file_operations ppc_rtas_clock_operations = {
.open = clock_open,
.read = seq_read,
.llseek = seq_lseek,
.write = ppc_rtas_clock_write,
.release = single_release,
};
static int tone_freq_open(struct inode *inode, struct file *file)
{
return single_open(file, ppc_rtas_tone_freq_show, NULL);
}
static const struct file_operations ppc_rtas_tone_freq_operations = {
.open = tone_freq_open,
.read = seq_read,
.llseek = seq_lseek,
.write = ppc_rtas_tone_freq_write,
.release = single_release,
};
static int tone_volume_open(struct inode *inode, struct file *file)
{
return single_open(file, ppc_rtas_tone_volume_show, NULL);
}
static const struct file_operations ppc_rtas_tone_volume_operations = {
.open = tone_volume_open,
.read = seq_read,
.llseek = seq_lseek,
.write = ppc_rtas_tone_volume_write,
.release = single_release,
};
static int rmo_buf_open(struct inode *inode, struct file *file)
{
return single_open(file, ppc_rtas_rmo_buf_show, NULL);
}
static const struct file_operations ppc_rtas_rmo_buf_ops = {
.open = rmo_buf_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int ppc_rtas_find_all_sensors(void);
static void ppc_rtas_process_sensor(struct seq_file *m,
struct individual_sensor *s, int state, int error, const char *loc);
static char *ppc_rtas_process_error(int error);
static void get_location_code(struct seq_file *m,
struct individual_sensor *s, const char *loc);
static void check_location_string(struct seq_file *m, const char *c);
static void check_location(struct seq_file *m, const char *c);
static int __init proc_rtas_init(void)
{
if (!machine_is(pseries))
return -ENODEV;
rtas_node = of_find_node_by_name(NULL, "rtas");
if (rtas_node == NULL)
return -ENODEV;
proc_create("powerpc/rtas/progress", 0644, NULL,
&ppc_rtas_progress_operations);
proc_create("powerpc/rtas/clock", 0644, NULL,
&ppc_rtas_clock_operations);
proc_create("powerpc/rtas/poweron", 0644, NULL,
&ppc_rtas_poweron_operations);
proc_create("powerpc/rtas/sensors", 0444, NULL,
&ppc_rtas_sensors_operations);
proc_create("powerpc/rtas/frequency", 0644, NULL,
&ppc_rtas_tone_freq_operations);
proc_create("powerpc/rtas/volume", 0644, NULL,
&ppc_rtas_tone_volume_operations);
proc_create("powerpc/rtas/rmo_buffer", 0400, NULL,
&ppc_rtas_rmo_buf_ops);
return 0;
}
__initcall(proc_rtas_init);
static int parse_number(const char __user *p, size_t count, unsigned long *val)
{
char buf[40];
char *end;
if (count > 39)
return -EINVAL;
if (copy_from_user(buf, p, count))
return -EFAULT;
buf[count] = 0;
*val = simple_strtoul(buf, &end, 10);
if (*end && *end != '\n')
return -EINVAL;
return 0;
}
/* ****************************************************************** */
/* POWER-ON-TIME */
/* ****************************************************************** */
static ssize_t ppc_rtas_poweron_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos)
{
struct rtc_time tm;
unsigned long nowtime;
int error = parse_number(buf, count, &nowtime);
if (error)
return error;
power_on_time = nowtime; /* save the time */
to_tm(nowtime, &tm);
error = rtas_call(rtas_token("set-time-for-power-on"), 7, 1, NULL,
tm.tm_year, tm.tm_mon, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec, 0 /* nano */);
if (error)
printk(KERN_WARNING "error: setting poweron time returned: %s\n",
ppc_rtas_process_error(error));
return count;
}
/* ****************************************************************** */
static int ppc_rtas_poweron_show(struct seq_file *m, void *v)
{
if (power_on_time == 0)
seq_printf(m, "Power on time not set\n");
else
seq_printf(m, "%lu\n",power_on_time);
return 0;
}
/* ****************************************************************** */
/* PROGRESS */
/* ****************************************************************** */
static ssize_t ppc_rtas_progress_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos)
{
unsigned long hex;
if (count >= MAX_LINELENGTH)
count = MAX_LINELENGTH -1;
if (copy_from_user(progress_led, buf, count)) { /* save the string */
return -EFAULT;
}
progress_led[count] = 0;
/* Lets see if the user passed hexdigits */
hex = simple_strtoul(progress_led, NULL, 10);
rtas_progress ((char *)progress_led, hex);
return count;
/* clear the line */
/* rtas_progress(" ", 0xffff);*/
}
/* ****************************************************************** */
static int ppc_rtas_progress_show(struct seq_file *m, void *v)
{
if (progress_led[0])
seq_printf(m, "%s\n", progress_led);
return 0;
}
/* ****************************************************************** */
/* CLOCK */
/* ****************************************************************** */
static ssize_t ppc_rtas_clock_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos)
{
struct rtc_time tm;
unsigned long nowtime;
int error = parse_number(buf, count, &nowtime);
if (error)
return error;
to_tm(nowtime, &tm);
error = rtas_call(rtas_token("set-time-of-day"), 7, 1, NULL,
tm.tm_year, tm.tm_mon, tm.tm_mday,
tm.tm_hour, tm.tm_min, tm.tm_sec, 0);
if (error)
printk(KERN_WARNING "error: setting the clock returned: %s\n",
ppc_rtas_process_error(error));
return count;
}
/* ****************************************************************** */
static int ppc_rtas_clock_show(struct seq_file *m, void *v)
{
int ret[8];
int error = rtas_call(rtas_token("get-time-of-day"), 0, 8, ret);
if (error) {
printk(KERN_WARNING "error: reading the clock returned: %s\n",
ppc_rtas_process_error(error));
seq_printf(m, "0");
} else {
unsigned int year, mon, day, hour, min, sec;
year = ret[0]; mon = ret[1]; day = ret[2];
hour = ret[3]; min = ret[4]; sec = ret[5];
seq_printf(m, "%lu\n",
mktime(year, mon, day, hour, min, sec));
}
return 0;
}
/* ****************************************************************** */
/* SENSOR STUFF */
/* ****************************************************************** */
static int ppc_rtas_sensors_show(struct seq_file *m, void *v)
{
int i,j;
int state, error;
int get_sensor_state = rtas_token("get-sensor-state");
seq_printf(m, "RTAS (RunTime Abstraction Services) Sensor Information\n");
seq_printf(m, "Sensor\t\tValue\t\tCondition\tLocation\n");
seq_printf(m, "********************************************************\n");
if (ppc_rtas_find_all_sensors() != 0) {
seq_printf(m, "\nNo sensors are available\n");
return 0;
}
for (i=0; i<sensors.quant; i++) {
struct individual_sensor *p = &sensors.sensor[i];
char rstr[64];
const char *loc;
int llen, offs;
sprintf (rstr, SENSOR_PREFIX"%04d", p->token);
loc = of_get_property(rtas_node, rstr, &llen);
/* A sensor may have multiple instances */
for (j = 0, offs = 0; j <= p->quant; j++) {
error = rtas_call(get_sensor_state, 2, 2, &state,
p->token, j);
ppc_rtas_process_sensor(m, p, state, error, loc);
seq_putc(m, '\n');
if (loc) {
offs += strlen(loc) + 1;
loc += strlen(loc) + 1;
if (offs >= llen)
loc = NULL;
}
}
}
return 0;
}
/* ****************************************************************** */
static int ppc_rtas_find_all_sensors(void)
{
const unsigned int *utmp;
int len, i;
utmp = of_get_property(rtas_node, "rtas-sensors", &len);
if (utmp == NULL) {
printk (KERN_ERR "error: could not get rtas-sensors\n");
return 1;
}
sensors.quant = len / 8; /* int + int */
for (i=0; i<sensors.quant; i++) {
sensors.sensor[i].token = *utmp++;
sensors.sensor[i].quant = *utmp++;
}
return 0;
}
/* ****************************************************************** */
/*
* Builds a string of what rtas returned
*/
static char *ppc_rtas_process_error(int error)
{
switch (error) {
case SENSOR_CRITICAL_HIGH:
return "(critical high)";
case SENSOR_WARNING_HIGH:
return "(warning high)";
case SENSOR_NORMAL:
return "(normal)";
case SENSOR_WARNING_LOW:
return "(warning low)";
case SENSOR_CRITICAL_LOW:
return "(critical low)";
case SENSOR_SUCCESS:
return "(read ok)";
case SENSOR_HW_ERROR:
return "(hardware error)";
case SENSOR_BUSY:
return "(busy)";
case SENSOR_NOT_EXIST:
return "(non existent)";
case SENSOR_DR_ENTITY:
return "(dr entity removed)";
default:
return "(UNKNOWN)";
}
}
/* ****************************************************************** */
/*
* Builds a string out of what the sensor said
*/
static void ppc_rtas_process_sensor(struct seq_file *m,
struct individual_sensor *s, int state, int error, const char *loc)
{
/* Defined return vales */
const char * key_switch[] = { "Off\t", "Normal\t", "Secure\t",
"Maintenance" };
const char * enclosure_switch[] = { "Closed", "Open" };
const char * lid_status[] = { " ", "Open", "Closed" };
const char * power_source[] = { "AC\t", "Battery",
"AC & Battery" };
const char * battery_remaining[] = { "Very Low", "Low", "Mid", "High" };
const char * epow_sensor[] = {
"EPOW Reset", "Cooling warning", "Power warning",
"System shutdown", "System halt", "EPOW main enclosure",
"EPOW power off" };
const char * battery_cyclestate[] = { "None", "In progress",
"Requested" };
const char * battery_charging[] = { "Charging", "Discharching",
"No current flow" };
const char * ibm_drconnector[] = { "Empty", "Present", "Unusable",
"Exchange" };
int have_strings = 0;
int num_states = 0;
int temperature = 0;
int unknown = 0;
/* What kind of sensor do we have here? */
switch (s->token) {
case KEY_SWITCH:
seq_printf(m, "Key switch:\t");
num_states = sizeof(key_switch) / sizeof(char *);
if (state < num_states) {
seq_printf(m, "%s\t", key_switch[state]);
have_strings = 1;
}
break;
case ENCLOSURE_SWITCH:
seq_printf(m, "Enclosure switch:\t");
num_states = sizeof(enclosure_switch) / sizeof(char *);
if (state < num_states) {
seq_printf(m, "%s\t",
enclosure_switch[state]);
have_strings = 1;
}
break;
case THERMAL_SENSOR:
seq_printf(m, "Temp. (C/F):\t");
temperature = 1;
break;
case LID_STATUS:
seq_printf(m, "Lid status:\t");
num_states = sizeof(lid_status) / sizeof(char *);
if (state < num_states) {
seq_printf(m, "%s\t", lid_status[state]);
have_strings = 1;
}
break;
case POWER_SOURCE:
seq_printf(m, "Power source:\t");
num_states = sizeof(power_source) / sizeof(char *);
if (state < num_states) {
seq_printf(m, "%s\t",
power_source[state]);
have_strings = 1;
}
break;
case BATTERY_VOLTAGE:
seq_printf(m, "Battery voltage:\t");
break;
case BATTERY_REMAINING:
seq_printf(m, "Battery remaining:\t");
num_states = sizeof(battery_remaining) / sizeof(char *);
if (state < num_states)
{
seq_printf(m, "%s\t",
battery_remaining[state]);
have_strings = 1;
}
break;
case BATTERY_PERCENTAGE:
seq_printf(m, "Battery percentage:\t");
break;
case EPOW_SENSOR:
seq_printf(m, "EPOW Sensor:\t");
num_states = sizeof(epow_sensor) / sizeof(char *);
if (state < num_states) {
seq_printf(m, "%s\t", epow_sensor[state]);
have_strings = 1;
}
break;
case BATTERY_CYCLESTATE:
seq_printf(m, "Battery cyclestate:\t");
num_states = sizeof(battery_cyclestate) /
sizeof(char *);
if (state < num_states) {
seq_printf(m, "%s\t",
battery_cyclestate[state]);
have_strings = 1;
}
break;
case BATTERY_CHARGING:
seq_printf(m, "Battery Charging:\t");
num_states = sizeof(battery_charging) / sizeof(char *);
if (state < num_states) {
seq_printf(m, "%s\t",
battery_charging[state]);
have_strings = 1;
}
break;
case IBM_SURVEILLANCE:
seq_printf(m, "Surveillance:\t");
break;
case IBM_FANRPM:
seq_printf(m, "Fan (rpm):\t");
break;
case IBM_VOLTAGE:
seq_printf(m, "Voltage (mv):\t");
break;
case IBM_DRCONNECTOR:
seq_printf(m, "DR connector:\t");
num_states = sizeof(ibm_drconnector) / sizeof(char *);
if (state < num_states) {
seq_printf(m, "%s\t",
ibm_drconnector[state]);
have_strings = 1;
}
break;
case IBM_POWERSUPPLY:
seq_printf(m, "Powersupply:\t");
break;
default:
seq_printf(m, "Unknown sensor (type %d), ignoring it\n",
s->token);
unknown = 1;
have_strings = 1;
break;
}
if (have_strings == 0) {
if (temperature) {
seq_printf(m, "%4d /%4d\t", state, cel_to_fahr(state));
} else
seq_printf(m, "%10d\t", state);
}
if (unknown == 0) {
seq_printf(m, "%s\t", ppc_rtas_process_error(error));
get_location_code(m, s, loc);
}
}
/* ****************************************************************** */
static void check_location(struct seq_file *m, const char *c)
{
switch (c[0]) {
case LOC_PLANAR:
seq_printf(m, "Planar #%c", c[1]);
break;
case LOC_CPU:
seq_printf(m, "CPU #%c", c[1]);
break;
case LOC_FAN:
seq_printf(m, "Fan #%c", c[1]);
break;
case LOC_RACKMOUNTED:
seq_printf(m, "Rack #%c", c[1]);
break;
case LOC_VOLTAGE:
seq_printf(m, "Voltage #%c", c[1]);
break;
case LOC_LCD:
seq_printf(m, "LCD #%c", c[1]);
break;
case '.':
seq_printf(m, "- %c", c[1]);
break;
default:
seq_printf(m, "Unknown location");
break;
}
}
/* ****************************************************************** */
/*
* Format:
* ${LETTER}${NUMBER}[[-/]${LETTER}${NUMBER} [ ... ] ]
* the '.' may be an abbreviation
*/
static void check_location_string(struct seq_file *m, const char *c)
{
while (*c) {
if (isalpha(*c) || *c == '.')
check_location(m, c);
else if (*c == '/' || *c == '-')
seq_printf(m, " at ");
c++;
}
}
/* ****************************************************************** */
static void get_location_code(struct seq_file *m, struct individual_sensor *s,
const char *loc)
{
if (!loc || !*loc) {
seq_printf(m, "---");/* does not have a location */
} else {
check_location_string(m, loc);
}
seq_putc(m, ' ');
}
/* ****************************************************************** */
/* INDICATORS - Tone Frequency */
/* ****************************************************************** */
static ssize_t ppc_rtas_tone_freq_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos)
{
unsigned long freq;
int error = parse_number(buf, count, &freq);
if (error)
return error;
rtas_tone_frequency = freq; /* save it for later */
error = rtas_call(rtas_token("set-indicator"), 3, 1, NULL,
TONE_FREQUENCY, 0, freq);
if (error)
printk(KERN_WARNING "error: setting tone frequency returned: %s\n",
ppc_rtas_process_error(error));
return count;
}
/* ****************************************************************** */
static int ppc_rtas_tone_freq_show(struct seq_file *m, void *v)
{
seq_printf(m, "%lu\n", rtas_tone_frequency);
return 0;
}
/* ****************************************************************** */
/* INDICATORS - Tone Volume */
/* ****************************************************************** */
static ssize_t ppc_rtas_tone_volume_write(struct file *file,
const char __user *buf, size_t count, loff_t *ppos)
{
unsigned long volume;
int error = parse_number(buf, count, &volume);
if (error)
return error;
if (volume > 100)
volume = 100;
rtas_tone_volume = volume; /* save it for later */
error = rtas_call(rtas_token("set-indicator"), 3, 1, NULL,
TONE_VOLUME, 0, volume);
if (error)
printk(KERN_WARNING "error: setting tone volume returned: %s\n",
ppc_rtas_process_error(error));
return count;
}
/* ****************************************************************** */
static int ppc_rtas_tone_volume_show(struct seq_file *m, void *v)
{
seq_printf(m, "%lu\n", rtas_tone_volume);
return 0;
}
#define RMO_READ_BUF_MAX 30
/* RTAS Userspace access */
static int ppc_rtas_rmo_buf_show(struct seq_file *m, void *v)
{
seq_printf(m, "%016lx %x\n", rtas_rmo_buf, RTAS_RMOBUF_MAX);
return 0;
}