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authorDaniel Lezcano <daniel.lezcano@linaro.org>2016-05-31 16:25:59 +0200
committerDaniel Lezcano <daniel.lezcano@linaro.org>2016-06-28 10:19:17 +0200
commitb7c4db861683af5fc50ac3cb3751cf847d765211 (patch)
treed99dd70e66b503d06d933f12e2ab3b994ba30dab
parentc35d9292fee0474a1a037f75b0b85af32200c76f (diff)
downloadlinux-b7c4db861683af5fc50ac3cb3751cf847d765211.tar.gz
clocksource/drivers/clksrc-probe: Introduce init functions with return code
Currently, the clksrc-probe is not able to handle any error from the init functions. There are different issues with the current code: - the code is duplicated in the init functions by writing error - every driver tends to panic in its own init function - counting the number of clocksources is not reliable This patch adds another table to store the functions returning an error. The table is temporary while we convert all the drivers to return an error and will disappear. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
-rw-r--r--drivers/clocksource/clksrc-probe.c22
-rw-r--r--include/asm-generic/vmlinux.lds.h2
-rw-r--r--include/linux/clocksource.h3
3 files changed, 27 insertions, 0 deletions
diff --git a/drivers/clocksource/clksrc-probe.c b/drivers/clocksource/clksrc-probe.c
index 7cb6c923a836..5fa6a555b35c 100644
--- a/drivers/clocksource/clksrc-probe.c
+++ b/drivers/clocksource/clksrc-probe.c
@@ -20,16 +20,22 @@
#include <linux/clocksource.h>
extern struct of_device_id __clksrc_of_table[];
+extern struct of_device_id __clksrc_ret_of_table[];
static const struct of_device_id __clksrc_of_table_sentinel
__used __section(__clksrc_of_table_end);
+static const struct of_device_id __clksrc_ret_of_table_sentinel
+ __used __section(__clksrc_ret_of_table_end);
+
void __init clocksource_probe(void)
{
struct device_node *np;
const struct of_device_id *match;
of_init_fn_1 init_func;
+ of_init_fn_1_ret init_func_ret;
unsigned clocksources = 0;
+ int ret;
for_each_matching_node_and_match(np, __clksrc_of_table, &match) {
if (!of_device_is_available(np))
@@ -40,6 +46,22 @@ void __init clocksource_probe(void)
clocksources++;
}
+ for_each_matching_node_and_match(np, __clksrc_ret_of_table, &match) {
+ if (!of_device_is_available(np))
+ continue;
+
+ init_func_ret = match->data;
+
+ ret = init_func_ret(np);
+ if (ret) {
+ pr_err("Failed to initialize '%s': %d",
+ of_node_full_name(np), ret);
+ continue;
+ }
+
+ clocksources++;
+ }
+
clocksources += acpi_probe_device_table(clksrc);
if (!clocksources)
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
index 6a67ab94b553..8c6c626285c0 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -173,6 +173,7 @@
*(__##name##_of_table_end)
#define CLKSRC_OF_TABLES() OF_TABLE(CONFIG_CLKSRC_OF, clksrc)
+#define CLKSRC_RET_OF_TABLES() OF_TABLE(CONFIG_CLKSRC_OF, clksrc_ret)
#define IRQCHIP_OF_MATCH_TABLE() OF_TABLE(CONFIG_IRQCHIP, irqchip)
#define CLK_OF_TABLES() OF_TABLE(CONFIG_COMMON_CLK, clk)
#define IOMMU_OF_TABLES() OF_TABLE(CONFIG_OF_IOMMU, iommu)
@@ -531,6 +532,7 @@
CLK_OF_TABLES() \
RESERVEDMEM_OF_TABLES() \
CLKSRC_OF_TABLES() \
+ CLKSRC_RET_OF_TABLES() \
IOMMU_OF_TABLES() \
CPU_METHOD_OF_TABLES() \
CPUIDLE_METHOD_OF_TABLES() \
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index 44a1aff22566..15c3839850f4 100644
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -246,6 +246,9 @@ extern int clocksource_i8253_init(void);
#define CLOCKSOURCE_OF_DECLARE(name, compat, fn) \
OF_DECLARE_1(clksrc, name, compat, fn)
+#define CLOCKSOURCE_OF_DECLARE_RET(name, compat, fn) \
+ OF_DECLARE_1_RET(clksrc_ret, name, compat, fn)
+
#ifdef CONFIG_CLKSRC_PROBE
extern void clocksource_probe(void);
#else