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ARM: SoC driver changes

Browse source 
SoC-near driver changes that we're merging through our tree. Mostly
 because they depend on other changes we have staged, but in some cases
 because the driver maintainers preferred that we did it this way.
 
 This contains a largeish cleanup series of the omap_l3_noc bus driver,
 cpuidle rework for Exynos, some reset driver conversions and a long
 branch of TI EDMA fixes and cleanups, with more to come next release.
 
 The TI EDMA cleanups is a shared branch with the dmaengine tree, with
 a handful of Davinci-specific fixes on top.
 
 After discussion at last year's KS (and some more on the mailing lists),
 we are here adding a drivers/soc directory. The purpose of this is
 to keep per-vendor shared code that's needed by different drivers but
 that doesn't fit into the MFD (nor drivers/platform) model. We expect
 to keep merging contents for this hierarchy through arm-soc so we can
 keep an eye on what the vendors keep adding here and not making it a
 free-for-all to shove in crazy stuff.
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Merge tag 'drivers-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc into next

Pull ARM SoC driver changes from Olof Johansson:
 "SoC-near driver changes that we're merging through our tree.  Mostly
  because they depend on other changes we have staged, but in some cases
  because the driver maintainers preferred that we did it this way.

  This contains a largeish cleanup series of the omap_l3_noc bus driver,
  cpuidle rework for Exynos, some reset driver conversions and a long
  branch of TI EDMA fixes and cleanups, with more to come next release.

  The TI EDMA cleanups is a shared branch with the dmaengine tree, with
  a handful of Davinci-specific fixes on top.

  After discussion at last year's KS (and some more on the mailing
  lists), we are here adding a drivers/soc directory.  The purpose of
  this is to keep per-vendor shared code that's needed by different
  drivers but that doesn't fit into the MFD (nor drivers/platform)
  model.  We expect to keep merging contents for this hierarchy through
  arm-soc so we can keep an eye on what the vendors keep adding here and
  not making it a free-for-all to shove in crazy stuff"

* tag 'drivers-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (101 commits)
  cpufreq: exynos: Fix driver compilation with ARCH_MULTIPLATFORM
  tty: serial: msm: Remove direct access to GSBI
  power: reset: keystone-reset: introduce keystone reset driver
  Documentation: dt: add bindings for keystone pll control controller
  Documentation: dt: add bindings for keystone reset driver
  soc: qcom: fix of_device_id table
  ARM: EXYNOS: Fix kernel panic when unplugging CPU1 on exynos
  ARM: EXYNOS: Move the driver to drivers/cpuidle directory
  ARM: EXYNOS: Cleanup all unneeded headers from cpuidle.c
  ARM: EXYNOS: Pass the AFTR callback to the platform_data
  ARM: EXYNOS: Move S5P_CHECK_SLEEP into pm.c
  ARM: EXYNOS: Move the power sequence call in the cpu_pm notifier
  ARM: EXYNOS: Move the AFTR state function into pm.c
  ARM: EXYNOS: Encapsulate the AFTR code into a function
  ARM: EXYNOS: Disable cpuidle for exynos5440
  ARM: EXYNOS: Encapsulate boot vector code into a function for cpuidle
  ARM: EXYNOS: Pass wakeup mask parameter to function for cpuidle
  ARM: EXYNOS: Remove ifdef for scu_enable in pm
  ARM: EXYNOS: Move scu_enable in the cpu_pm notifier
  ARM: EXYNOS: Use the cpu_pm notifier for pm
  ...
This commit is contained in:
Linus Torvalds 2014-06-02 16:35:49 -07:00
commit a727eaf64f
58 changed files with 2605 additions and 1062 deletions
Download patch file Download diff file Expand all files Collapse all files

6
drivers/cpufreq/Kconfig.arm
View file

@ -30,7 +30,7 @@ config ARM_EXYNOS_CPUFREQ
config ARM_EXYNOS4210_CPUFREQ
bool "SAMSUNG EXYNOS4210"
depends on CPU_EXYNOS4210 && !ARCH_MULTIPLATFORM
depends on CPU_EXYNOS4210
default y
select ARM_EXYNOS_CPUFREQ
help
@ -41,7 +41,7 @@ config ARM_EXYNOS4210_CPUFREQ
config ARM_EXYNOS4X12_CPUFREQ
bool "SAMSUNG EXYNOS4x12"
depends on (SOC_EXYNOS4212 || SOC_EXYNOS4412) && !ARCH_MULTIPLATFORM
depends on SOC_EXYNOS4212 || SOC_EXYNOS4412
default y
select ARM_EXYNOS_CPUFREQ
help
@ -52,7 +52,7 @@ config ARM_EXYNOS4X12_CPUFREQ
config ARM_EXYNOS5250_CPUFREQ
bool "SAMSUNG EXYNOS5250"
depends on SOC_EXYNOS5250 && !ARCH_MULTIPLATFORM
depends on SOC_EXYNOS5250
default y
select ARM_EXYNOS_CPUFREQ
help

2
drivers/cpufreq/exynos-cpufreq.c
View file

@ -19,8 +19,6 @@
#include <linux/platform_device.h>
#include <linux/of.h>
#include <plat/cpu.h>
#include "exynos-cpufreq.h"
static struct exynos_dvfs_info *exynos_info;

30
drivers/cpufreq/exynos-cpufreq.h
View file

@ -49,6 +49,7 @@ struct exynos_dvfs_info {
struct cpufreq_frequency_table *freq_table;
void (*set_freq)(unsigned int, unsigned int);
bool (*need_apll_change)(unsigned int, unsigned int);
void __iomem *cmu_regs;
};
#ifdef CONFIG_ARM_EXYNOS4210_CPUFREQ
@ -76,24 +77,21 @@ static inline int exynos5250_cpufreq_init(struct exynos_dvfs_info *info)
}
#endif
#include <plat/cpu.h>
#include <mach/map.h>
#define EXYNOS4_CLKSRC_CPU 0x14200
#define EXYNOS4_CLKMUX_STATCPU 0x14400
#define EXYNOS4_CLKSRC_CPU (S5P_VA_CMU + 0x14200)
#define EXYNOS4_CLKMUX_STATCPU (S5P_VA_CMU + 0x14400)
#define EXYNOS4_CLKDIV_CPU (S5P_VA_CMU + 0x14500)
#define EXYNOS4_CLKDIV_CPU1 (S5P_VA_CMU + 0x14504)
#define EXYNOS4_CLKDIV_STATCPU (S5P_VA_CMU + 0x14600)
#define EXYNOS4_CLKDIV_STATCPU1 (S5P_VA_CMU + 0x14604)
#define EXYNOS4_CLKDIV_CPU 0x14500
#define EXYNOS4_CLKDIV_CPU1 0x14504
#define EXYNOS4_CLKDIV_STATCPU 0x14600
#define EXYNOS4_CLKDIV_STATCPU1 0x14604
#define EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT (16)
#define EXYNOS4_CLKMUX_STATCPU_MUXCORE_MASK (0x7 << EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT)
#define EXYNOS5_APLL_LOCK (S5P_VA_CMU + 0x00000)
#define EXYNOS5_APLL_CON0 (S5P_VA_CMU + 0x00100)
#define EXYNOS5_CLKMUX_STATCPU (S5P_VA_CMU + 0x00400)
#define EXYNOS5_CLKDIV_CPU0 (S5P_VA_CMU + 0x00500)
#define EXYNOS5_CLKDIV_CPU1 (S5P_VA_CMU + 0x00504)
#define EXYNOS5_CLKDIV_STATCPU0 (S5P_VA_CMU + 0x00600)
#define EXYNOS5_CLKDIV_STATCPU1 (S5P_VA_CMU + 0x00604)
#define EXYNOS5_APLL_LOCK 0x00000
#define EXYNOS5_APLL_CON0 0x00100
#define EXYNOS5_CLKMUX_STATCPU 0x00400
#define EXYNOS5_CLKDIV_CPU0 0x00500
#define EXYNOS5_CLKDIV_CPU1 0x00504
#define EXYNOS5_CLKDIV_STATCPU0 0x00600
#define EXYNOS5_CLKDIV_STATCPU1 0x00604

39
drivers/cpufreq/exynos4210-cpufreq.c
View file

@ -16,6 +16,8 @@
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/cpufreq.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include "exynos-cpufreq.h"
@ -23,6 +25,7 @@ static struct clk *cpu_clk;
static struct clk *moutcore;
static struct clk *mout_mpll;
static struct clk *mout_apll;
static struct exynos_dvfs_info *cpufreq;
static unsigned int exynos4210_volt_table[] = {
1250000, 1150000, 1050000, 975000, 950000,
@ -60,20 +63,20 @@ static void exynos4210_set_clkdiv(unsigned int div_index)
tmp = apll_freq_4210[div_index].clk_div_cpu0;
__raw_writel(tmp, EXYNOS4_CLKDIV_CPU);
__raw_writel(tmp, cpufreq->cmu_regs + EXYNOS4_CLKDIV_CPU);
do {
tmp = __raw_readl(EXYNOS4_CLKDIV_STATCPU);
tmp = __raw_readl(cpufreq->cmu_regs + EXYNOS4_CLKDIV_STATCPU);
} while (tmp & 0x1111111);
/* Change Divider - CPU1 */
tmp = apll_freq_4210[div_index].clk_div_cpu1;
__raw_writel(tmp, EXYNOS4_CLKDIV_CPU1);
__raw_writel(tmp, cpufreq->cmu_regs + EXYNOS4_CLKDIV_CPU1);
do {
tmp = __raw_readl(EXYNOS4_CLKDIV_STATCPU1);
tmp = __raw_readl(cpufreq->cmu_regs + EXYNOS4_CLKDIV_STATCPU1);
} while (tmp & 0x11);
}
@ -85,7 +88,7 @@ static void exynos4210_set_apll(unsigned int index)
clk_set_parent(moutcore, mout_mpll);
do {
tmp = (__raw_readl(EXYNOS4_CLKMUX_STATCPU)
tmp = (__raw_readl(cpufreq->cmu_regs + EXYNOS4_CLKMUX_STATCPU)
>> EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT);
tmp &= 0x7;
} while (tmp != 0x2);
@ -96,7 +99,7 @@ static void exynos4210_set_apll(unsigned int index)
clk_set_parent(moutcore, mout_apll);
do {
tmp = __raw_readl(EXYNOS4_CLKMUX_STATCPU);
tmp = __raw_readl(cpufreq->cmu_regs + EXYNOS4_CLKMUX_STATCPU);
tmp &= EXYNOS4_CLKMUX_STATCPU_MUXCORE_MASK;
} while (tmp != (0x1 << EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT));
}
@ -115,8 +118,30 @@ static void exynos4210_set_frequency(unsigned int old_index,
int exynos4210_cpufreq_init(struct exynos_dvfs_info *info)
{
struct device_node *np;
unsigned long rate;
/*
* HACK: This is a temporary workaround to get access to clock
* controller registers directly and remove static mappings and
* dependencies on platform headers. It is necessary to enable
* Exynos multi-platform support and will be removed together with
* this whole driver as soon as Exynos gets migrated to use
* cpufreq-cpu0 driver.
*/
np = of_find_compatible_node(NULL, NULL, "samsung,exynos4210-clock");
if (!np) {
pr_err("%s: failed to find clock controller DT node\n",
__func__);
return -ENODEV;
}
info->cmu_regs = of_iomap(np, 0);
if (!info->cmu_regs) {
pr_err("%s: failed to map CMU registers\n", __func__);
return -EFAULT;
}
cpu_clk = clk_get(NULL, "armclk");
if (IS_ERR(cpu_clk))
return PTR_ERR(cpu_clk);
@ -143,6 +168,8 @@ int exynos4210_cpufreq_init(struct exynos_dvfs_info *info)
info->freq_table = exynos4210_freq_table;
info->set_freq = exynos4210_set_frequency;
cpufreq = info;
return 0;
err_mout_apll:

40
drivers/cpufreq/exynos4x12-cpufreq.c
View file

@ -16,6 +16,8 @@
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/cpufreq.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include "exynos-cpufreq.h"
@ -23,6 +25,7 @@ static struct clk *cpu_clk;
static struct clk *moutcore;
static struct clk *mout_mpll;
static struct clk *mout_apll;
static struct exynos_dvfs_info *cpufreq;
static unsigned int exynos4x12_volt_table[] = {
1350000, 1287500, 1250000, 1187500, 1137500, 1087500, 1037500,
@ -105,19 +108,20 @@ static void exynos4x12_set_clkdiv(unsigned int div_index)
tmp = apll_freq_4x12[div_index].clk_div_cpu0;
__raw_writel(tmp, EXYNOS4_CLKDIV_CPU);
__raw_writel(tmp, cpufreq->cmu_regs + EXYNOS4_CLKDIV_CPU);
while (__raw_readl(EXYNOS4_CLKDIV_STATCPU) & 0x11111111)
while (__raw_readl(cpufreq->cmu_regs + EXYNOS4_CLKDIV_STATCPU)
& 0x11111111)
cpu_relax();
/* Change Divider - CPU1 */
tmp = apll_freq_4x12[div_index].clk_div_cpu1;
__raw_writel(tmp, EXYNOS4_CLKDIV_CPU1);
__raw_writel(tmp, cpufreq->cmu_regs + EXYNOS4_CLKDIV_CPU1);
do {
cpu_relax();
tmp = __raw_readl(EXYNOS4_CLKDIV_STATCPU1);
tmp = __raw_readl(cpufreq->cmu_regs + EXYNOS4_CLKDIV_STATCPU1);
} while (tmp != 0x0);
}
@ -130,7 +134,7 @@ static void exynos4x12_set_apll(unsigned int index)
do {
cpu_relax();
tmp = (__raw_readl(EXYNOS4_CLKMUX_STATCPU)
tmp = (__raw_readl(cpufreq->cmu_regs + EXYNOS4_CLKMUX_STATCPU)
>> EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT);
tmp &= 0x7;
} while (tmp != 0x2);
@ -142,7 +146,7 @@ static void exynos4x12_set_apll(unsigned int index)
do {
cpu_relax();
tmp = __raw_readl(EXYNOS4_CLKMUX_STATCPU);
tmp = __raw_readl(cpufreq->cmu_regs + EXYNOS4_CLKMUX_STATCPU);
tmp &= EXYNOS4_CLKMUX_STATCPU_MUXCORE_MASK;
} while (tmp != (0x1 << EXYNOS4_CLKSRC_CPU_MUXCORE_SHIFT));
}
@ -161,8 +165,30 @@ static void exynos4x12_set_frequency(unsigned int old_index,
int exynos4x12_cpufreq_init(struct exynos_dvfs_info *info)
{
struct device_node *np;
unsigned long rate;
/*
* HACK: This is a temporary workaround to get access to clock
* controller registers directly and remove static mappings and
* dependencies on platform headers. It is necessary to enable
* Exynos multi-platform support and will be removed together with
* this whole driver as soon as Exynos gets migrated to use
* cpufreq-cpu0 driver.
*/
np = of_find_compatible_node(NULL, NULL, "samsung,exynos4412-clock");
if (!np) {
pr_err("%s: failed to find clock controller DT node\n",
__func__);
return -ENODEV;
}
info->cmu_regs = of_iomap(np, 0);
if (!info->cmu_regs) {
pr_err("%s: failed to map CMU registers\n", __func__);
return -EFAULT;
}
cpu_clk = clk_get(NULL, "armclk");
if (IS_ERR(cpu_clk))
return PTR_ERR(cpu_clk);
@ -194,6 +220,8 @@ int exynos4x12_cpufreq_init(struct exynos_dvfs_info *info)
info->freq_table = exynos4x12_freq_table;
info->set_freq = exynos4x12_set_frequency;
cpufreq = info;
return 0;
err_mout_apll:

43
drivers/cpufreq/exynos5250-cpufreq.c
View file

@ -16,8 +16,8 @@
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/cpufreq.h>
#include <mach/map.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include "exynos-cpufreq.h"
@ -25,6 +25,7 @@ static struct clk *cpu_clk;
static struct clk *moutcore;
static struct clk *mout_mpll;
static struct clk *mout_apll;
static struct exynos_dvfs_info *cpufreq;
static unsigned int exynos5250_volt_table[] = {
1300000, 1250000, 1225000, 1200000, 1150000,
@ -87,17 +88,18 @@ static void set_clkdiv(unsigned int div_index)
tmp = apll_freq_5250[div_index].clk_div_cpu0;
__raw_writel(tmp, EXYNOS5_CLKDIV_CPU0);
__raw_writel(tmp, cpufreq->cmu_regs + EXYNOS5_CLKDIV_CPU0);
while (__raw_readl(EXYNOS5_CLKDIV_STATCPU0) & 0x11111111)
while (__raw_readl(cpufreq->cmu_regs + EXYNOS5_CLKDIV_STATCPU0)
& 0x11111111)
cpu_relax();
/* Change Divider - CPU1 */
tmp = apll_freq_5250[div_index].clk_div_cpu1;
__raw_writel(tmp, EXYNOS5_CLKDIV_CPU1);
__raw_writel(tmp, cpufreq->cmu_regs + EXYNOS5_CLKDIV_CPU1);
while (__raw_readl(EXYNOS5_CLKDIV_STATCPU1) & 0x11)
while (__raw_readl(cpufreq->cmu_regs + EXYNOS5_CLKDIV_STATCPU1) & 0x11)
cpu_relax();
}
@ -111,7 +113,8 @@ static void set_apll(unsigned int index)
do {
cpu_relax();
tmp = (__raw_readl(EXYNOS5_CLKMUX_STATCPU) >> 16);
tmp = (__raw_readl(cpufreq->cmu_regs + EXYNOS5_CLKMUX_STATCPU)
>> 16);
tmp &= 0x7;
} while (tmp != 0x2);
@ -122,7 +125,7 @@ static void set_apll(unsigned int index)
do {
cpu_relax();
tmp = __raw_readl(EXYNOS5_CLKMUX_STATCPU);
tmp = __raw_readl(cpufreq->cmu_regs + EXYNOS5_CLKMUX_STATCPU);
tmp &= (0x7 << 16);
} while (tmp != (0x1 << 16));
}
@ -141,8 +144,30 @@ static void exynos5250_set_frequency(unsigned int old_index,
int exynos5250_cpufreq_init(struct exynos_dvfs_info *info)
{
struct device_node *np;
unsigned long rate;
/*
* HACK: This is a temporary workaround to get access to clock
* controller registers directly and remove static mappings and
* dependencies on platform headers. It is necessary to enable
* Exynos multi-platform support and will be removed together with
* this whole driver as soon as Exynos gets migrated to use
* cpufreq-cpu0 driver.
*/
np = of_find_compatible_node(NULL, NULL, "samsung,exynos5250-clock");
if (!np) {
pr_err("%s: failed to find clock controller DT node\n",
__func__);
return -ENODEV;
}
info->cmu_regs = of_iomap(np, 0);
if (!info->cmu_regs) {
pr_err("%s: failed to map CMU registers\n", __func__);
return -EFAULT;
}
cpu_clk = clk_get(NULL, "armclk");
if (IS_ERR(cpu_clk))
return PTR_ERR(cpu_clk);
@ -169,6 +194,8 @@ int exynos5250_cpufreq_init(struct exynos_dvfs_info *info)
info->freq_table = exynos5250_freq_table;
info->set_freq = exynos5250_set_frequency;
cpufreq = info;
return 0;
err_mout_apll: