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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-11 10:41:07 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-04-13 08:17:18 +0300
commite09b41010ba33a20a87472ee821fa407a5b8da36 (patch)
treed10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/clk/versatile
parentf93b97fd65072de626c074dbe099a1fff05ce060 (diff)
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page. During the rebasing, the following patch collided: Force tick interrupt and get rid of softirq magic(I70131fb85). Collisions have been removed because its logic was found on the source already. Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/clk/versatile')
-rw-r--r--kernel/drivers/clk/versatile/Kconfig2
-rw-r--r--kernel/drivers/clk/versatile/clk-icst.c9
-rw-r--r--kernel/drivers/clk/versatile/clk-impd1.c1
-rw-r--r--kernel/drivers/clk/versatile/clk-realview.c5
-rw-r--r--kernel/drivers/clk/versatile/clk-sp810.c81
-rw-r--r--kernel/drivers/clk/versatile/clk-versatile.c4
6 files changed, 28 insertions, 74 deletions
diff --git a/kernel/drivers/clk/versatile/Kconfig b/kernel/drivers/clk/versatile/Kconfig
index 1530c9352..fc50b6264 100644
--- a/kernel/drivers/clk/versatile/Kconfig
+++ b/kernel/drivers/clk/versatile/Kconfig
@@ -1,6 +1,6 @@
config COMMON_CLK_VERSATILE
bool "Clock driver for ARM Reference designs"
- depends on ARCH_INTEGRATOR || ARCH_REALVIEW || ARCH_VEXPRESS || ARM64
+ depends on ARCH_INTEGRATOR || ARCH_REALVIEW || ARCH_VEXPRESS || ARM64 || COMPILE_TEST
---help---
Supports clocking on ARM Reference designs:
- Integrator/AP and Integrator/CP
diff --git a/kernel/drivers/clk/versatile/clk-icst.c b/kernel/drivers/clk/versatile/clk-icst.c
index bc96f103b..08c5ee976 100644
--- a/kernel/drivers/clk/versatile/clk-icst.c
+++ b/kernel/drivers/clk/versatile/clk-icst.c
@@ -13,8 +13,9 @@
* ICST clock code from the ARM tree should probably be merged into this
* file.
*/
-#include <linux/clk.h>
-#include <linux/clkdev.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/export.h>
#include <linux/err.h>
#include <linux/clk-provider.h>
#include <linux/io.h>
@@ -156,8 +157,10 @@ struct clk *icst_clk_register(struct device *dev,
icst->lockreg = base + desc->lock_offset;
clk = clk_register(dev, &icst->hw);
- if (IS_ERR(clk))
+ if (IS_ERR(clk)) {
+ kfree(pclone);
kfree(icst);
+ }
return clk;
}
diff --git a/kernel/drivers/clk/versatile/clk-impd1.c b/kernel/drivers/clk/versatile/clk-impd1.c
index 1cc1330dc..65c842a21 100644
--- a/kernel/drivers/clk/versatile/clk-impd1.c
+++ b/kernel/drivers/clk/versatile/clk-impd1.c
@@ -7,7 +7,6 @@
* published by the Free Software Foundation.
*/
#include <linux/clk-provider.h>
-#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/err.h>
#include <linux/io.h>
diff --git a/kernel/drivers/clk/versatile/clk-realview.c b/kernel/drivers/clk/versatile/clk-realview.c
index c8b523117..86f70997d 100644
--- a/kernel/drivers/clk/versatile/clk-realview.c
+++ b/kernel/drivers/clk/versatile/clk-realview.c
@@ -6,7 +6,6 @@
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
-#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/err.h>
#include <linux/io.h>
@@ -33,13 +32,13 @@ static const struct icst_params realview_oscvco_params = {
.idx2s = icst307_idx2s,
};
-static const struct clk_icst_desc __initdata realview_osc0_desc = {
+static const struct clk_icst_desc realview_osc0_desc __initconst = {
.params = &realview_oscvco_params,
.vco_offset = REALVIEW_SYS_OSC0_OFFSET,
.lock_offset = REALVIEW_SYS_LOCK_OFFSET,
};
-static const struct clk_icst_desc __initdata realview_osc4_desc = {
+static const struct clk_icst_desc realview_osc4_desc __initconst = {
.params = &realview_oscvco_params,
.vco_offset = REALVIEW_SYS_OSC4_OFFSET,
.lock_offset = REALVIEW_SYS_LOCK_OFFSET,
diff --git a/kernel/drivers/clk/versatile/clk-sp810.c b/kernel/drivers/clk/versatile/clk-sp810.c
index 5122ef25f..a1cdef6b0 100644
--- a/kernel/drivers/clk/versatile/clk-sp810.c
+++ b/kernel/drivers/clk/versatile/clk-sp810.c
@@ -12,7 +12,8 @@
*/
#include <linux/amba/sp810.h>
-#include <linux/clkdev.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/err.h>
#include <linux/of.h>
@@ -32,12 +33,9 @@ struct clk_sp810_timerclken {
struct clk_sp810 {
struct device_node *node;
- int refclk_index, timclk_index;
void __iomem *base;
spinlock_t lock;
struct clk_sp810_timerclken timerclken[4];
- struct clk *refclk;
- struct clk *timclk;
};
static u8 clk_sp810_timerclken_get_parent(struct clk_hw *hw)
@@ -70,55 +68,7 @@ static int clk_sp810_timerclken_set_parent(struct clk_hw *hw, u8 index)
return 0;
}
-/*
- * FIXME - setting the parent every time .prepare is invoked is inefficient.
- * This is better handled by a dedicated clock tree configuration mechanism at
- * init-time. Revisit this later when such a mechanism exists
- */
-static int clk_sp810_timerclken_prepare(struct clk_hw *hw)
-{
- struct clk_sp810_timerclken *timerclken = to_clk_sp810_timerclken(hw);
- struct clk_sp810 *sp810 = timerclken->sp810;
- struct clk *old_parent = __clk_get_parent(hw->clk);
- struct clk *new_parent;
-
- if (!sp810->refclk)
- sp810->refclk = of_clk_get(sp810->node, sp810->refclk_index);
-
- if (!sp810->timclk)
- sp810->timclk = of_clk_get(sp810->node, sp810->timclk_index);
-
- if (WARN_ON(IS_ERR(sp810->refclk) || IS_ERR(sp810->timclk)))
- return -ENOENT;
-
- /* Select fastest parent */
- if (clk_get_rate(sp810->refclk) > clk_get_rate(sp810->timclk))
- new_parent = sp810->refclk;
- else
- new_parent = sp810->timclk;
-
- /* Switch the parent if necessary */
- if (old_parent != new_parent) {
- clk_prepare(new_parent);
- clk_set_parent(hw->clk, new_parent);
- clk_unprepare(old_parent);
- }
-
- return 0;
-}
-
-static void clk_sp810_timerclken_unprepare(struct clk_hw *hw)
-{
- struct clk_sp810_timerclken *timerclken = to_clk_sp810_timerclken(hw);
- struct clk_sp810 *sp810 = timerclken->sp810;
-
- clk_put(sp810->timclk);
- clk_put(sp810->refclk);
-}
-
static const struct clk_ops clk_sp810_timerclken_ops = {
- .prepare = clk_sp810_timerclken_prepare,
- .unprepare = clk_sp810_timerclken_unprepare,
.get_parent = clk_sp810_timerclken_get_parent,
.set_parent = clk_sp810_timerclken_set_parent,
};
@@ -135,28 +85,22 @@ static struct clk *clk_sp810_timerclken_of_get(struct of_phandle_args *clkspec,
return sp810->timerclken[clkspec->args[0]].clk;
}
-void __init clk_sp810_of_setup(struct device_node *node)
+static void __init clk_sp810_of_setup(struct device_node *node)
{
struct clk_sp810 *sp810 = kzalloc(sizeof(*sp810), GFP_KERNEL);
const char *parent_names[2];
+ int num = ARRAY_SIZE(parent_names);
char name[12];
struct clk_init_data init;
int i;
+ bool deprecated;
if (!sp810) {
pr_err("Failed to allocate memory for SP810!\n");
return;
}
- sp810->refclk_index = of_property_match_string(node, "clock-names",
- "refclk");
- parent_names[0] = of_clk_get_parent_name(node, sp810->refclk_index);
-
- sp810->timclk_index = of_property_match_string(node, "clock-names",
- "timclk");
- parent_names[1] = of_clk_get_parent_name(node, sp810->timclk_index);
-
- if (parent_names[0] <= 0 || parent_names[1] <= 0) {
+ if (of_clk_parent_fill(node, parent_names, num) != num) {
pr_warn("Failed to obtain parent clocks for SP810!\n");
return;
}
@@ -169,7 +113,9 @@ void __init clk_sp810_of_setup(struct device_node *node)
init.ops = &clk_sp810_timerclken_ops;
init.flags = CLK_IS_BASIC;
init.parent_names = parent_names;
- init.num_parents = ARRAY_SIZE(parent_names);
+ init.num_parents = num;
+
+ deprecated = !of_find_property(node, "assigned-clock-parents", NULL);
for (i = 0; i < ARRAY_SIZE(sp810->timerclken); i++) {
snprintf(name, ARRAY_SIZE(name), "timerclken%d", i);
@@ -178,6 +124,15 @@ void __init clk_sp810_of_setup(struct device_node *node)
sp810->timerclken[i].channel = i;
sp810->timerclken[i].hw.init = &init;
+ /*
+ * If DT isn't setting the parent, force it to be
+ * the 1 MHz clock without going through the framework.
+ * We do this before clk_register() so that it can determine
+ * the parent and setup the tree properly.
+ */
+ if (deprecated)
+ init.ops->set_parent(&sp810->timerclken[i].hw, 1);
+
sp810->timerclken[i].clk = clk_register(NULL,
&sp810->timerclken[i].hw);
WARN_ON(IS_ERR(sp810->timerclken[i].clk));
diff --git a/kernel/drivers/clk/versatile/clk-versatile.c b/kernel/drivers/clk/versatile/clk-versatile.c
index 7a4f8635b..a89a92756 100644
--- a/kernel/drivers/clk/versatile/clk-versatile.c
+++ b/kernel/drivers/clk/versatile/clk-versatile.c
@@ -8,8 +8,6 @@
* published by the Free Software Foundation.
*/
#include <linux/clk-provider.h>
-#include <linux/clk.h>
-#include <linux/clkdev.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/of_address.h>
@@ -35,7 +33,7 @@ static const struct icst_params cp_auxosc_params = {
.idx2s = icst525_idx2s,
};
-static const struct clk_icst_desc __initdata cm_auxosc_desc = {
+static const struct clk_icst_desc cm_auxosc_desc __initconst = {
.params = &cp_auxosc_params,
.vco_offset = 0x1c,
.lock_offset = INTEGRATOR_HDR_LOCK_OFFSET,