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i.MX SoC changes for 5.3: 

- Switch imx7d to imx-cpufreq-dt for speed-grading, as imx-cpufreq-dt
    driver can handle speed grading bits on imx7d just like on imx8mq.
  - Improve imx6 cpuidle driver to use raw_spinlock_t.  The change makes
    no difference for !RT build, but is required by RT kernel.
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Merge tag 'imx-soc-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into arm/soc

i.MX SoC changes for 5.3:
 - Switch imx7d to imx-cpufreq-dt for speed-grading, as imx-cpufreq-dt
   driver can handle speed grading bits on imx7d just like on imx8mq.
 - Improve imx6 cpuidle driver to use raw_spinlock_t.  The change makes
   no difference for !RT build, but is required by RT kernel.

* tag 'imx-soc-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux:
  ARM: imx: Switch imx7d to imx-cpufreq-dt for speed-grading
  ARM: imx6: cpuidle: Use raw_spinlock_t

Signed-off-by: Olof Johansson <olof@lixom.net>
alistair/sunxi64-5.4-dsi
Olof Johansson 2019-06-25 05:51:56 -07:00
parent f7fd41afa1 a5a9dffcc9
commit a7d8814641
2 changed files with 12 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/arm/mach-imx/cpuidle-imx6q.c
View File

@ -17,22 +17,22 @@
#include "hardware.h"
static int num_idle_cpus = 0;
static DEFINE_SPINLOCK(cpuidle_lock);
static DEFINE_RAW_SPINLOCK(cpuidle_lock);
static int imx6q_enter_wait(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index)
{
spin_lock(&cpuidle_lock);
raw_spin_lock(&cpuidle_lock);
if (++num_idle_cpus == num_online_cpus())
imx6_set_lpm(WAIT_UNCLOCKED);
spin_unlock(&cpuidle_lock);
raw_spin_unlock(&cpuidle_lock);
cpu_do_idle();
spin_lock(&cpuidle_lock);
raw_spin_lock(&cpuidle_lock);
if (num_idle_cpus-- == num_online_cpus())
imx6_set_lpm(WAIT_CLOCKED);
spin_unlock(&cpuidle_lock);
raw_spin_unlock(&cpuidle_lock);
return index;
}

7
arch/arm/mach-imx/mach-imx7d.c
View File

@ -97,6 +97,12 @@ static void __init imx7d_init_machine(void)
imx7d_enet_init();
}
static void __init imx7d_init_late(void)
{
if (IS_ENABLED(CONFIG_ARM_IMX_CPUFREQ_DT))
platform_device_register_simple("imx-cpufreq-dt", -1, NULL, 0);
}
static void __init imx7d_init_irq(void)
{
imx_init_revision_from_anatop();
@ -113,5 +119,6 @@ static const char *const imx7d_dt_compat[] __initconst = {
DT_MACHINE_START(IMX7D, "Freescale i.MX7 Dual (Device Tree)")
.init_irq = imx7d_init_irq,
.init_machine = imx7d_init_machine,
.init_late = imx7d_init_late,
.dt_compat = imx7d_dt_compat,
MACHINE_END