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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-22 16:02:13 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-22 16:02:13 -0700
commit5d4e2d08e7fdf7339f84a1c670d296a77e02f881 (patch)
tree1c419660defa56191091dfdf50fdb57a72009173 /lib
parentfb2123fad3b499f0898835b19dbb93b18d27ee98 (diff)
parent94ca629e40eb7e997be21d8065c25e4f3797b03f (diff)
Merge tag 'driver-core-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg Kroah-Hartman: "Here's the driver core, and other driver subsystems, pull request for the 3.5-rc1 merge window. Outside of a few minor driver core changes, we ended up with the following different subsystem and core changes as well, due to interdependancies on the driver core: - hyperv driver updates - drivers/memory being created and some drivers moved into it - extcon driver subsystem created out of the old Android staging switch driver code - dynamic debug updates - printk rework, and /dev/kmsg changes All of this has been tested in the linux-next releases for a few weeks with no reported problems. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>" Fix up conflicts in drivers/extcon/extcon-max8997.c where git noticed that a patch to the deleted drivers/misc/max8997-muic.c driver needs to be applied to this one. * tag 'driver-core-3.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (90 commits) uio_pdrv_genirq: get irq through platform resource if not set otherwise memory: tegra{20,30}-mc: Remove empty *_remove() printk() - isolate KERN_CONT users from ordinary complete lines sysfs: get rid of some lockdep false positives Drivers: hv: util: Properly handle version negotiations. Drivers: hv: Get rid of an unnecessary check in vmbus_prep_negotiate_resp() memory: tegra{20,30}-mc: Use dev_err_ratelimited() driver core: Add dev_*_ratelimited() family Driver Core: don't oops with unregistered driver in driver_find_device() printk() - restore prefix/timestamp printing for multi-newline strings printk: add stub for prepend_timestamp() ARM: tegra30: Make MC optional in Kconfig ARM: tegra20: Make MC optional in Kconfig ARM: tegra30: MC: Remove unnecessary BUG*() ARM: tegra20: MC: Remove unnecessary BUG*() printk: correctly align __log_buf ARM: tegra30: Add Tegra Memory Controller(MC) driver ARM: tegra20: Add Tegra Memory Controller(MC) driver printk() - restore timestamp printing at console output printk() - do not merge continuation lines of different threads ...
Diffstat (limited to 'lib')
-rw-r--r--lib/Kconfig8
-rw-r--r--lib/Kconfig.debug33
-rw-r--r--lib/Makefile2
-rw-r--r--lib/dynamic_debug.c190
-rw-r--r--lib/jedec_ddr_data.c135
-rw-r--r--lib/kobject.c14
6 files changed, 295 insertions, 87 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index 4a8aba2e5cc..0e25c03939e 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -353,6 +353,14 @@ config CORDIC
This option provides an implementation of the CORDIC algorithm;
calculations are in fixed point. Module will be called cordic.
+config DDR
+ bool "JEDEC DDR data"
+ help
+ Data from JEDEC specs for DDR SDRAM memories,
+ particularly the AC timing parameters and addressing
+ information. This data is useful for drivers handling
+ DDR SDRAM controllers.
+
config MPILIB
tristate
select CLZ_TAB
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 6777153f18f..e1193417703 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -3,12 +3,16 @@ config PRINTK_TIME
bool "Show timing information on printks"
depends on PRINTK
help
- Selecting this option causes timing information to be
- included in printk output. This allows you to measure
- the interval between kernel operations, including bootup
- operations. This is useful for identifying long delays
- in kernel startup. Or add printk.time=1 at boot-time.
- See Documentation/kernel-parameters.txt
+ Selecting this option causes time stamps of the printk()
+ messages to be added to the output of the syslog() system
+ call and at the console.
+
+ The timestamp is always recorded internally, and exported
+ to /dev/kmsg. This flag just specifies if the timestamp should
+ be included, not that the timestamp is recorded.
+
+ The behavior is also controlled by the kernel command line
+ parameter printk.time=1. See Documentation/kernel-parameters.txt
config DEFAULT_MESSAGE_LOGLEVEL
int "Default message log level (1-7)"
@@ -1205,8 +1209,13 @@ config DYNAMIC_DEBUG
otherwise be available at runtime. These messages can then be
enabled/disabled based on various levels of scope - per source file,
function, module, format string, and line number. This mechanism
- implicitly enables all pr_debug() and dev_dbg() calls. The impact of
- this compile option is a larger kernel text size of about 2%.
+ implicitly compiles in all pr_debug() and dev_dbg() calls, which
+ enlarges the kernel text size by about 2%.
+
+ If a source file is compiled with DEBUG flag set, any
+ pr_debug() calls in it are enabled by default, but can be
+ disabled at runtime as below. Note that DEBUG flag is
+ turned on by many CONFIG_*DEBUG* options.
Usage:
@@ -1223,16 +1232,16 @@ config DYNAMIC_DEBUG
lineno : line number of the debug statement
module : module that contains the debug statement
function : function that contains the debug statement
- flags : 'p' means the line is turned 'on' for printing
+ flags : '=p' means the line is turned 'on' for printing
format : the format used for the debug statement
From a live system:
nullarbor:~ # cat <debugfs>/dynamic_debug/control
# filename:lineno [module]function flags format
- fs/aio.c:222 [aio]__put_ioctx - "__put_ioctx:\040freeing\040%p\012"
- fs/aio.c:248 [aio]ioctx_alloc - "ENOMEM:\040nr_events\040too\040high\012"
- fs/aio.c:1770 [aio]sys_io_cancel - "calling\040cancel\012"
+ fs/aio.c:222 [aio]__put_ioctx =_ "__put_ioctx:\040freeing\040%p\012"
+ fs/aio.c:248 [aio]ioctx_alloc =_ "ENOMEM:\040nr_events\040too\040high\012"
+ fs/aio.c:1770 [aio]sys_io_cancel =_ "calling\040cancel\012"
Example usage:
diff --git a/lib/Makefile b/lib/Makefile
index 18515f0267c..74290c9e286 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -123,6 +123,8 @@ obj-$(CONFIG_SIGNATURE) += digsig.o
obj-$(CONFIG_CLZ_TAB) += clz_tab.o
+obj-$(CONFIG_DDR) += jedec_ddr_data.o
+
hostprogs-y := gen_crc32table
clean-files := crc32table.h
diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c
index 310c753cf83..7ca29a0a301 100644
--- a/lib/dynamic_debug.c
+++ b/lib/dynamic_debug.c
@@ -107,20 +107,22 @@ static char *ddebug_describe_flags(struct _ddebug *dp, char *buf,
return buf;
}
-#define vpr_info_dq(q, msg) \
-do { \
- if (verbose) \
- /* trim last char off format print */ \
- pr_info("%s: func=\"%s\" file=\"%s\" " \
- "module=\"%s\" format=\"%.*s\" " \
- "lineno=%u-%u", \
- msg, \
- q->function ? q->function : "", \
- q->filename ? q->filename : "", \
- q->module ? q->module : "", \
- (int)(q->format ? strlen(q->format) - 1 : 0), \
- q->format ? q->format : "", \
- q->first_lineno, q->last_lineno); \
+#define vpr_info(fmt, ...) \
+ if (verbose) do { pr_info(fmt, ##__VA_ARGS__); } while (0)
+
+#define vpr_info_dq(q, msg) \
+do { \
+ /* trim last char off format print */ \
+ vpr_info("%s: func=\"%s\" file=\"%s\" " \
+ "module=\"%s\" format=\"%.*s\" " \
+ "lineno=%u-%u", \
+ msg, \
+ q->function ? q->function : "", \
+ q->filename ? q->filename : "", \
+ q->module ? q->module : "", \
+ (int)(q->format ? strlen(q->format) - 1 : 0), \
+ q->format ? q->format : "", \
+ q->first_lineno, q->last_lineno); \
} while (0)
/*
@@ -180,12 +182,11 @@ static int ddebug_change(const struct ddebug_query *query,
if (newflags == dp->flags)
continue;
dp->flags = newflags;
- if (verbose)
- pr_info("changed %s:%d [%s]%s =%s\n",
- trim_prefix(dp->filename), dp->lineno,
- dt->mod_name, dp->function,
- ddebug_describe_flags(dp, flagbuf,
- sizeof(flagbuf)));
+ vpr_info("changed %s:%d [%s]%s =%s\n",
+ trim_prefix(dp->filename), dp->lineno,
+ dt->mod_name, dp->function,
+ ddebug_describe_flags(dp, flagbuf,
+ sizeof(flagbuf)));
}
}
mutex_unlock(&ddebug_lock);
@@ -337,7 +338,7 @@ static int check_set(const char **dest, char *src, char *name)
* Returns 0 on success, <0 on error.
*/
static int ddebug_parse_query(char *words[], int nwords,
- struct ddebug_query *query)
+ struct ddebug_query *query, const char *modname)
{
unsigned int i;
int rc;
@@ -347,6 +348,10 @@ static int ddebug_parse_query(char *words[], int nwords,
return -EINVAL;
memset(query, 0, sizeof(*query));
+ if (modname)
+ /* support $modname.dyndbg=<multiple queries> */
+ query->module = modname;
+
for (i = 0 ; i < nwords ; i += 2) {
if (!strcmp(words[i], "func"))
rc = check_set(&query->function, words[i+1], "func");
@@ -410,8 +415,7 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
default:
return -EINVAL;
}
- if (verbose)
- pr_info("op='%c'\n", op);
+ vpr_info("op='%c'\n", op);
for ( ; *str ; ++str) {
for (i = ARRAY_SIZE(opt_array) - 1; i >= 0; i--) {
@@ -423,8 +427,7 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
if (i < 0)
return -EINVAL;
}
- if (verbose)
- pr_info("flags=0x%x\n", flags);
+ vpr_info("flags=0x%x\n", flags);
/* calculate final *flagsp, *maskp according to mask and op */
switch (op) {
@@ -441,12 +444,11 @@ static int ddebug_parse_flags(const char *str, unsigned int *flagsp,
*flagsp = 0;
break;
}
- if (verbose)
- pr_info("*flagsp=0x%x *maskp=0x%x\n", *flagsp, *maskp);
+ vpr_info("*flagsp=0x%x *maskp=0x%x\n", *flagsp, *maskp);
return 0;
}
-static int ddebug_exec_query(char *query_string)
+static int ddebug_exec_query(char *query_string, const char *modname)
{
unsigned int flags = 0, mask = 0;
struct ddebug_query query;
@@ -457,7 +459,7 @@ static int ddebug_exec_query(char *query_string)
nwords = ddebug_tokenize(query_string, words, MAXWORDS);
if (nwords <= 0)
return -EINVAL;
- if (ddebug_parse_query(words, nwords-1, &query))
+ if (ddebug_parse_query(words, nwords-1, &query, modname))
return -EINVAL;
if (ddebug_parse_flags(words[nwords-1], &flags, &mask))
return -EINVAL;
@@ -473,7 +475,7 @@ static int ddebug_exec_query(char *query_string)
last error or number of matching callsites. Module name is either
in param (for boot arg) or perhaps in query string.
*/
-static int ddebug_exec_queries(char *query)
+static int ddebug_exec_queries(char *query, const char *modname)
{
char *split;
int i, errs = 0, exitcode = 0, rc, nfound = 0;
@@ -487,10 +489,9 @@ static int ddebug_exec_queries(char *query)
if (!query || !*query || *query == '#')
continue;
- if (verbose)
- pr_info("query %d: \"%s\"\n", i, query);
+ vpr_info("query %d: \"%s\"\n", i, query);
- rc = ddebug_exec_query(query);
+ rc = ddebug_exec_query(query, modname);
if (rc < 0) {
errs++;
exitcode = rc;
@@ -498,7 +499,7 @@ static int ddebug_exec_queries(char *query)
nfound += rc;
i++;
}
- pr_info("processed %d queries, with %d matches, %d errs\n",
+ vpr_info("processed %d queries, with %d matches, %d errs\n",
i, nfound, errs);
if (exitcode)
@@ -653,10 +654,9 @@ static ssize_t ddebug_proc_write(struct file *file, const char __user *ubuf,
return -EFAULT;
}
tmpbuf[len] = '\0';
- if (verbose)
- pr_info("read %d bytes from userspace\n", (int)len);
+ vpr_info("read %d bytes from userspace\n", (int)len);
- ret = ddebug_exec_queries(tmpbuf);
+ ret = ddebug_exec_queries(tmpbuf, NULL);
kfree(tmpbuf);
if (ret < 0)
return ret;
@@ -717,8 +717,7 @@ static void *ddebug_proc_start(struct seq_file *m, loff_t *pos)
struct _ddebug *dp;
int n = *pos;
- if (verbose)
- pr_info("called m=%p *pos=%lld\n", m, (unsigned long long)*pos);
+ vpr_info("called m=%p *pos=%lld\n", m, (unsigned long long)*pos);
mutex_lock(&ddebug_lock);
@@ -742,9 +741,8 @@ static void *ddebug_proc_next(struct seq_file *m, void *p, loff_t *pos)
struct ddebug_iter *iter = m->private;
struct _ddebug *dp;
- if (verbose)
- pr_info("called m=%p p=%p *pos=%lld\n",
- m, p, (unsigned long long)*pos);
+ vpr_info("called m=%p p=%p *pos=%lld\n",
+ m, p, (unsigned long long)*pos);
if (p == SEQ_START_TOKEN)
dp = ddebug_iter_first(iter);
@@ -766,8 +764,7 @@ static int ddebug_proc_show(struct seq_file *m, void *p)
struct _ddebug *dp = p;
char flagsbuf[10];
- if (verbose)
- pr_info("called m=%p p=%p\n", m, p);
+ vpr_info("called m=%p p=%p\n", m, p);
if (p == SEQ_START_TOKEN) {
seq_puts(m,
@@ -791,8 +788,7 @@ static int ddebug_proc_show(struct seq_file *m, void *p)
*/
static void ddebug_proc_stop(struct seq_file *m, void *p)
{
- if (verbose)
- pr_info("called m=%p p=%p\n", m, p);
+ vpr_info("called m=%p p=%p\n", m, p);
mutex_unlock(&ddebug_lock);
}
@@ -815,8 +811,7 @@ static int ddebug_proc_open(struct inode *inode, struct file *file)
struct ddebug_iter *iter;
int err;
- if (verbose)
- pr_info("called\n");
+ vpr_info("called\n");
iter = kzalloc(sizeof(*iter), GFP_KERNEL);
if (iter == NULL)
@@ -866,12 +861,51 @@ int ddebug_add_module(struct _ddebug *tab, unsigned int n,
list_add_tail(&dt->link, &ddebug_tables);
mutex_unlock(&ddebug_lock);
- if (verbose)
- pr_info("%u debug prints in module %s\n", n, dt->mod_name);
+ vpr_info("%u debug prints in module %s\n", n, dt->mod_name);
return 0;
}
EXPORT_SYMBOL_GPL(ddebug_add_module);
+/* helper for ddebug_dyndbg_(boot|module)_param_cb */
+static int ddebug_dyndbg_param_cb(char *param, char *val,
+ const char *modname, int on_err)
+{
+ char *sep;
+
+ sep = strchr(param, '.');
+ if (sep) {
+ /* needed only for ddebug_dyndbg_boot_param_cb */
+ *sep = '\0';
+ modname = param;
+ param = sep + 1;
+ }
+ if (strcmp(param, "dyndbg"))
+ return on_err; /* determined by caller */
+
+ ddebug_exec_queries((val ? val : "+p"), modname);
+
+ return 0; /* query failure shouldnt stop module load */
+}
+
+/* handle both dyndbg and $module.dyndbg params at boot */
+static int ddebug_dyndbg_boot_param_cb(char *param, char *val,
+ const char *unused)
+{
+ vpr_info("%s=\"%s\"\n", param, val);
+ return ddebug_dyndbg_param_cb(param, val, NULL, 0);
+}
+
+/*
+ * modprobe foo finds foo.params in boot-args, strips "foo.", and
+ * passes them to load_module(). This callback gets unknown params,
+ * processes dyndbg params, rejects others.
+ */
+int ddebug_dyndbg_module_param_cb(char *param, char *val, const char *module)
+{
+ vpr_info("module: %s %s=\"%s\"\n", module, param, val);
+ return ddebug_dyndbg_param_cb(param, val, module, -ENOENT);
+}
+
static void ddebug_table_free(struct ddebug_table *dt)
{
list_del_init(&dt->link);
@@ -888,8 +922,7 @@ int ddebug_remove_module(const char *mod_name)
struct ddebug_table *dt, *nextdt;
int ret = -ENOENT;
- if (verbose)
- pr_info("removing module \"%s\"\n", mod_name);
+ vpr_info("removing module \"%s\"\n", mod_name);
mutex_lock(&ddebug_lock);
list_for_each_entry_safe(dt, nextdt, &ddebug_tables, link) {
@@ -940,8 +973,10 @@ static int __init dynamic_debug_init(void)
{
struct _ddebug *iter, *iter_start;
const char *modname = NULL;
+ char *cmdline;
int ret = 0;
- int n = 0;
+ int n = 0, entries = 0, modct = 0;
+ int verbose_bytes = 0;
if (__start___verbose == __stop___verbose) {
pr_warn("_ddebug table is empty in a "
@@ -952,10 +987,15 @@ static int __init dynamic_debug_init(void)
modname = iter->modname;
iter_start = iter;
for (; iter < __stop___verbose; iter++) {
+ entries++;
+ verbose_bytes += strlen(iter->modname) + strlen(iter->function)
+ + strlen(iter->filename) + strlen(iter->format);
+
if (strcmp(modname, iter->modname)) {
+ modct++;
ret = ddebug_add_module(iter_start, n, modname);
if (ret)
- goto out_free;
+ goto out_err;
n = 0;
modname = iter->modname;
iter_start = iter;
@@ -964,29 +1004,45 @@ static int __init dynamic_debug_init(void)
}
ret = ddebug_add_module(iter_start, n, modname);
if (ret)
- goto out_free;
+ goto out_err;
+
+ ddebug_init_success = 1;
+ vpr_info("%d modules, %d entries and %d bytes in ddebug tables,"
+ " %d bytes in (readonly) verbose section\n",
+ modct, entries, (int)( modct * sizeof(struct ddebug_table)),
+ verbose_bytes + (int)(__stop___verbose - __start___verbose));
- /* ddebug_query boot param got passed -> set it up */
+ /* apply ddebug_query boot param, dont unload tables on err */
if (ddebug_setup_string[0] != '\0') {
- ret = ddebug_exec_queries(ddebug_setup_string);
+ pr_warn("ddebug_query param name is deprecated,"
+ " change it to dyndbg\n");
+ ret = ddebug_exec_queries(ddebug_setup_string, NULL);
if (ret < 0)
pr_warn("Invalid ddebug boot param %s",
ddebug_setup_string);
else
pr_info("%d changes by ddebug_query\n", ret);
-
- /* keep tables even on ddebug_query parse error */
- ret = 0;
}
+ /* now that ddebug tables are loaded, process all boot args
+ * again to find and activate queries given in dyndbg params.
+ * While this has already been done for known boot params, it
+ * ignored the unknown ones (dyndbg in particular). Reusing
+ * parse_args avoids ad-hoc parsing. This will also attempt
+ * to activate queries for not-yet-loaded modules, which is
+ * slightly noisy if verbose, but harmless.
+ */
+ cmdline = kstrdup(saved_command_line, GFP_KERNEL);
+ parse_args("dyndbg params", cmdline, NULL,
+ 0, 0, 0, &ddebug_dyndbg_boot_param_cb);
+ kfree(cmdline);
+ return 0;
-out_free:
- if (ret)
- ddebug_remove_all_tables();
- else
- ddebug_init_success = 1;
+out_err:
+ ddebug_remove_all_tables();
return 0;
}
/* Allow early initialization for boot messages via boot param */
-arch_initcall(dynamic_debug_init);
+early_initcall(dynamic_debug_init);
+
/* Debugfs setup must be done later */
-module_init(dynamic_debug_init_debugfs);
+fs_initcall(dynamic_debug_init_debugfs);
diff --git a/lib/jedec_ddr_data.c b/lib/jedec_ddr_data.c
new file mode 100644
index 00000000000..6d2cbf1d567
--- /dev/null
+++ b/lib/jedec_ddr_data.c
@@ -0,0 +1,135 @@
+/*
+ * DDR addressing details and AC timing parameters from JEDEC specs
+ *
+ * Copyright (C) 2012 Texas Instruments, Inc.
+ *
+ * Aneesh V <aneesh@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <memory/jedec_ddr.h>
+#include <linux/module.h>
+
+/* LPDDR2 addressing details from JESD209-2 section 2.4 */
+const struct lpddr2_addressing
+ lpddr2_jedec_addressing_table[NUM_DDR_ADDR_TABLE_ENTRIES] = {
+ {B4, T_REFI_15_6, T_RFC_90}, /* 64M */
+ {B4, T_REFI_15_6, T_RFC_90}, /* 128M */
+ {B4, T_REFI_7_8, T_RFC_90}, /* 256M */
+ {B4, T_REFI_7_8, T_RFC_90}, /* 512M */
+ {B8, T_REFI_7_8, T_RFC_130}, /* 1GS4 */
+ {B8, T_REFI_3_9, T_RFC_130}, /* 2GS4 */
+ {B8, T_REFI_3_9, T_RFC_130}, /* 4G */
+ {B8, T_REFI_3_9, T_RFC_210}, /* 8G */
+ {B4, T_REFI_7_8, T_RFC_130}, /* 1GS2 */
+ {B4, T_REFI_3_9, T_RFC_130}, /* 2GS2 */
+};
+EXPORT_SYMBOL_GPL(lpddr2_jedec_addressing_table);
+
+/* LPDDR2 AC timing parameters from JESD209-2 section 12 */
+const struct lpddr2_timings
+ lpddr2_jedec_timings[NUM_DDR_TIMING_TABLE_ENTRIES] = {
+ /* Speed bin 400(200 MHz) */
+ [0] = {
+ .max_freq = 200000000,
+ .min_freq = 10000000,
+ .tRPab = 21000,
+ .tRCD = 18000,
+ .tWR = 15000,
+ .tRAS_min = 42000,
+ .tRRD = 10000,
+ .tWTR = 10000,
+ .tXP = 7500,
+ .tRTP = 7500,
+ .tCKESR = 15000,
+ .tDQSCK_max = 5500,
+ .tFAW = 50000,
+ .tZQCS = 90000,
+ .tZQCL = 360000,
+ .tZQinit = 1000000,
+ .tRAS_max_ns = 70000,
+ .tDQSCK_max_derated = 6000,
+ },
+ /* Speed bin 533(266 MHz) */
+ [1] = {
+ .max_freq = 266666666,
+ .min_freq = 10000000,
+ .tRPab = 21000,
+ .tRCD = 18000,
+ .tWR = 15000,
+ .tRAS_min = 42000,
+ .tRRD = 10000,
+ .tWTR = 7500,
+ .tXP = 7500,
+ .tRTP = 7500,
+ .tCKESR = 15000,
+ .tDQSCK_max = 5500,
+ .tFAW = 50000,
+ .tZQCS = 90000,
+ .tZQCL = 360000,
+ .tZQinit = 1000000,
+ .tRAS_max_ns = 70000,
+ .tDQSCK_max_derated = 6000,
+ },
+ /* Speed bin 800(400 MHz) */
+ [2] = {
+ .max_freq = 400000000,
+ .min_freq = 10000000,
+ .tRPab = 21000,
+ .tRCD = 18000,
+ .tWR = 15000,
+ .tRAS_min = 42000,
+ .tRRD = 10000,
+ .tWTR = 7500,
+ .tXP = 7500,
+ .tRTP = 7500,
+ .tCKESR = 15000,
+ .tDQSCK_max = 5500,
+ .tFAW = 50000,
+ .tZQCS = 90000,
+ .tZQCL = 360000,
+ .tZQinit = 1000000,
+ .tRAS_max_ns = 70000,
+ .tDQSCK_max_derated = 6000,
+ },
+ /* Speed bin 1066(533 MHz) */
+ [3] = {
+ .max_freq = 533333333,
+ .min_freq = 10000000,
+ .tRPab = 21000,
+ .tRCD = 18000,
+ .tWR = 15000,
+ .tRAS_min = 42000,
+ .tRRD = 10000,
+ .tWTR = 7500,
+ .tXP = 7500,
+ .tRTP = 7500,
+ .tCKESR = 15000,
+ .tDQSCK_max = 5500,
+ .tFAW = 50000,
+ .tZQCS = 90000,
+ .tZQCL = 360000,
+ .tZQinit = 1000000,
+ .tRAS_max_ns = 70000,
+ .tDQSCK_max_derated = 5620,
+ },
+};
+EXPORT_SYMBOL_GPL(lpddr2_jedec_timings);
+
+const struct lpddr2_min_tck lpddr2_jedec_min_tck = {
+ .tRPab = 3,
+ .tRCD = 3,
+ .tWR = 3,
+ .tRASmin = 3,
+ .tRRD = 2,
+ .tWTR = 2,
+ .tXP = 2,
+ .tRTP = 2,
+ .tCKE = 3,
+ .tCKESR = 3,
+ .tFAW = 8
+};
+EXPORT_SYMBOL_GPL(lpddr2_jedec_min_tck);
diff --git a/lib/kobject.c b/lib/kobject.c
index aeefa8bc8b1..e07ee1fcd6f 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -47,13 +47,11 @@ static int populate_dir(struct kobject *kobj)
static int create_dir(struct kobject *kobj)
{
int error = 0;
- if (kobject_name(kobj)) {
- error = sysfs_create_dir(kobj);
- if (!error) {
- error = populate_dir(kobj);
- if (error)
- sysfs_remove_dir(kobj);
- }
+ error = sysfs_create_dir(kobj);
+ if (!error) {
+ error = populate_dir(kobj);
+ if (error)
+ sysfs_remove_dir(kobj);
}
return error;
}
@@ -634,7 +632,7 @@ struct kobject *kobject_create(void)
/**
* kobject_create_and_add - create a struct kobject dynamically and register it with sysfs
*
- * @name: the name for the kset
+ * @name: the name for the kobject
* @parent: the parent kobject of this kobject, if any.
*
* This function creates a kobject structure dynamically and registers it