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Merge branch 'clockevents/renesas-timers-dt' into clockevents/3.17

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This commit is contained in:
Daniel Lezcano 2014-07-23 12:00:00 +02:00
parent afdb094380 cca8d0596c
commit de2ea58155
7 changed files with 314 additions and 332 deletions
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47
Documentation/devicetree/bindings/timer/renesas,cmt.txt Normal file
View file

@ -0,0 +1,47 @@
* Renesas R-Car Compare Match Timer (CMT)
The CMT is a multi-channel 16/32/48-bit timer/counter with configurable clock
inputs and programmable compare match.
Channels share hardware resources but their counter and compare match value
are independent. A particular CMT instance can implement only a subset of the
channels supported by the CMT model. Channel indices represent the hardware
position of the channel in the CMT and don't match the channel numbers in the
datasheets.
Required Properties:
- compatible: must contain one of the following.
- "renesas,cmt-32" for the 32-bit CMT
(CMT0 on sh7372, sh73a0 and r8a7740)
- "renesas,cmt-32-fast" for the 32-bit CMT with fast clock support
(CMT[234] on sh7372, sh73a0 and r8a7740)
- "renesas,cmt-48" for the 48-bit CMT
(CMT1 on sh7372, sh73a0 and r8a7740)
- "renesas,cmt-48-gen2" for the second generation 48-bit CMT
(CMT[01] on r8a73a4, r8a7790 and r8a7791)
- reg: base address and length of the registers block for the timer module.
- interrupts: interrupt-specifier for the timer, one per channel.
- clocks: a list of phandle + clock-specifier pairs, one for each entry
in clock-names.
- clock-names: must contain "fck" for the functional clock.
- renesas,channels-mask: bitmask of the available channels.
Example: R8A7790 (R-Car H2) CMT0 node
CMT0 on R8A7790 implements hardware channels 5 and 6 only and names
them channels 0 and 1 in the documentation.
cmt0: timer@ffca0000 {
compatible = "renesas,cmt-48-gen2";
reg = <0 0xffca0000 0 0x1004>;
interrupts = <0 142 IRQ_TYPE_LEVEL_HIGH>,
<0 142 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&mstp1_clks R8A7790_CLK_CMT0>;
clock-names = "fck";
renesas,channels-mask = <0x60>;
};

39
Documentation/devicetree/bindings/timer/renesas,mtu2.txt Normal file
View file

@ -0,0 +1,39 @@
* Renesas R-Car Multi-Function Timer Pulse Unit 2 (MTU2)
The MTU2 is a multi-purpose, multi-channel timer/counter with configurable
clock inputs and programmable compare match.
Channels share hardware resources but their counter and compare match value
are independent. The MTU2 hardware supports five channels indexed from 0 to 4.
Required Properties:
- compatible: must contain "renesas,mtu2"
- reg: base address and length of the registers block for the timer module.
- interrupts: interrupt specifiers for the timer, one for each entry in
interrupt-names.
- interrupt-names: must contain one entry named "tgi?a" for each enabled
channel, where "?" is the channel index expressed as one digit from "0" to
"4".
- clocks: a list of phandle + clock-specifier pairs, one for each entry
in clock-names.
- clock-names: must contain "fck" for the functional clock.
Example: R7S72100 (RZ/A1H) MTU2 node
mtu2: timer@fcff0000 {
compatible = "renesas,mtu2";
reg = <0xfcff0000 0x400>;
interrupts = <0 139 IRQ_TYPE_LEVEL_HIGH>,
<0 146 IRQ_TYPE_LEVEL_HIGH>,
<0 150 IRQ_TYPE_LEVEL_HIGH>,
<0 154 IRQ_TYPE_LEVEL_HIGH>,
<0 159 IRQ_TYPE_LEVEL_HIGH>;
interrupt-names = "tgi0a", "tgi1a", "tgi2a", "tgi3a", "tgi4a";
clocks = <&mstp3_clks R7S72100_CLK_MTU2>;
clock-names = "fck";
};

39
Documentation/devicetree/bindings/timer/renesas,tmu.txt Normal file
View file

@ -0,0 +1,39 @@
* Renesas R-Car Timer Unit (TMU)
The TMU is a 32-bit timer/counter with configurable clock inputs and
programmable compare match.
Channels share hardware resources but their counter and compare match value
are independent. The TMU hardware supports up to three channels.
Required Properties:
- compatible: must contain "renesas,tmu"
- reg: base address and length of the registers block for the timer module.
- interrupts: interrupt-specifier for the timer, one per channel.
- clocks: a list of phandle + clock-specifier pairs, one for each entry
in clock-names.
- clock-names: must contain "fck" for the functional clock.
Optional Properties:
- #renesas,channels: number of channels implemented by the timer, must be 2
or 3 (if not specified the value defaults to 3).
Example: R8A7779 (R-Car H1) TMU0 node
tmu0: timer@ffd80000 {
compatible = "renesas,tmu";
reg = <0xffd80000 0x30>;
interrupts = <0 32 IRQ_TYPE_LEVEL_HIGH>,
<0 33 IRQ_TYPE_LEVEL_HIGH>,
<0 34 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&mstp0_clks R8A7779_CLK_TMU0>;
clock-names = "fck";
#renesas,channels = <3>;
};

235
drivers/clocksource/sh_cmt.c
View file

@ -24,6 +24,7 @@
#include <linux/ioport.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/pm_runtime.h>
@ -114,14 +115,15 @@ struct sh_cmt_device {
struct platform_device *pdev;
const struct sh_cmt_info *info;
bool legacy;
void __iomem *mapbase_ch;
void __iomem *mapbase;
struct clk *clk;
raw_spinlock_t lock; /* Protect the shared start/stop register */
struct sh_cmt_channel *channels;
unsigned int num_channels;
unsigned int hw_channels;
bool has_clockevent;
bool has_clocksource;
@ -301,14 +303,12 @@ static unsigned long sh_cmt_get_counter(struct sh_cmt_channel *ch,
return v2;
}
static DEFINE_RAW_SPINLOCK(sh_cmt_lock);
static void sh_cmt_start_stop_ch(struct sh_cmt_channel *ch, int start)
{
unsigned long flags, value;
/* start stop register shared by multiple timer channels */
raw_spin_lock_irqsave(&sh_cmt_lock, flags);
raw_spin_lock_irqsave(&ch->cmt->lock, flags);
value = sh_cmt_read_cmstr(ch);
if (start)
@ -317,7 +317,7 @@ static void sh_cmt_start_stop_ch(struct sh_cmt_channel *ch, int start)
value &= ~(1 << ch->timer_bit);
sh_cmt_write_cmstr(ch, value);
raw_spin_unlock_irqrestore(&sh_cmt_lock, flags);
raw_spin_unlock_irqrestore(&ch->cmt->lock, flags);
}
static int sh_cmt_enable(struct sh_cmt_channel *ch, unsigned long *rate)
@ -792,7 +792,7 @@ static int sh_cmt_register_clockevent(struct sh_cmt_channel *ch,
int irq;
int ret;
irq = platform_get_irq(ch->cmt->pdev, ch->cmt->legacy ? 0 : ch->index);
irq = platform_get_irq(ch->cmt->pdev, ch->index);
if (irq < 0) {
dev_err(&ch->cmt->pdev->dev, "ch%u: failed to get irq\n",
ch->index);
@ -863,33 +863,26 @@ static int sh_cmt_setup_channel(struct sh_cmt_channel *ch, unsigned int index,
* Compute the address of the channel control register block. For the
* timers with a per-channel start/stop register, compute its address
* as well.
*
* For legacy configuration the address has been mapped explicitly.
*/
if (cmt->legacy) {
ch->ioctrl = cmt->mapbase_ch;
} else {
switch (cmt->info->model) {
case SH_CMT_16BIT:
ch->ioctrl = cmt->mapbase + 2 + ch->hwidx * 6;
break;
case SH_CMT_32BIT:
case SH_CMT_48BIT:
ch->ioctrl = cmt->mapbase + 0x10 + ch->hwidx * 0x10;
break;
case SH_CMT_32BIT_FAST:
/*
* The 32-bit "fast" timer has a single channel at hwidx
* 5 but is located at offset 0x40 instead of 0x60 for
* some reason.
*/
ch->ioctrl = cmt->mapbase + 0x40;
break;
case SH_CMT_48BIT_GEN2:
ch->iostart = cmt->mapbase + ch->hwidx * 0x100;
ch->ioctrl = ch->iostart + 0x10;
break;
}
switch (cmt->info->model) {
case SH_CMT_16BIT:
ch->ioctrl = cmt->mapbase + 2 + ch->hwidx * 6;
break;
case SH_CMT_32BIT:
case SH_CMT_48BIT:
ch->ioctrl = cmt->mapbase + 0x10 + ch->hwidx * 0x10;
break;
case SH_CMT_32BIT_FAST:
/*
* The 32-bit "fast" timer has a single channel at hwidx 5 but
* is located at offset 0x40 instead of 0x60 for some reason.
*/
ch->ioctrl = cmt->mapbase + 0x40;
break;
case SH_CMT_48BIT_GEN2:
ch->iostart = cmt->mapbase + ch->hwidx * 0x100;
ch->ioctrl = ch->iostart + 0x10;
break;
}
if (cmt->info->width == (sizeof(ch->max_match_value) * 8))
@ -900,12 +893,7 @@ static int sh_cmt_setup_channel(struct sh_cmt_channel *ch, unsigned int index,
ch->match_value = ch->max_match_value;
raw_spin_lock_init(&ch->lock);
if (cmt->legacy) {
ch->timer_bit = ch->hwidx;
} else {
ch->timer_bit = cmt->info->model == SH_CMT_48BIT_GEN2
? 0 : ch->hwidx;
}
ch->timer_bit = cmt->info->model == SH_CMT_48BIT_GEN2 ? 0 : ch->hwidx;
ret = sh_cmt_register(ch, dev_name(&cmt->pdev->dev),
clockevent, clocksource);
@ -938,75 +926,65 @@ static int sh_cmt_map_memory(struct sh_cmt_device *cmt)
return 0;
}
static int sh_cmt_map_memory_legacy(struct sh_cmt_device *cmt)
static const struct platform_device_id sh_cmt_id_table[] = {
{ "sh-cmt-16", (kernel_ulong_t)&sh_cmt_info[SH_CMT_16BIT] },
{ "sh-cmt-32", (kernel_ulong_t)&sh_cmt_info[SH_CMT_32BIT] },
{ "sh-cmt-32-fast", (kernel_ulong_t)&sh_cmt_info[SH_CMT_32BIT_FAST] },
{ "sh-cmt-48", (kernel_ulong_t)&sh_cmt_info[SH_CMT_48BIT] },
{ "sh-cmt-48-gen2", (kernel_ulong_t)&sh_cmt_info[SH_CMT_48BIT_GEN2] },
{ }
};
MODULE_DEVICE_TABLE(platform, sh_cmt_id_table);
static const struct of_device_id sh_cmt_of_table[] __maybe_unused = {
{ .compatible = "renesas,cmt-32", .data = &sh_cmt_info[SH_CMT_32BIT] },
{ .compatible = "renesas,cmt-32-fast", .data = &sh_cmt_info[SH_CMT_32BIT_FAST] },
{ .compatible = "renesas,cmt-48", .data = &sh_cmt_info[SH_CMT_48BIT] },
{ .compatible = "renesas,cmt-48-gen2", .data = &sh_cmt_info[SH_CMT_48BIT_GEN2] },
{ }
};
MODULE_DEVICE_TABLE(of, sh_cmt_of_table);
static int sh_cmt_parse_dt(struct sh_cmt_device *cmt)
{
struct sh_timer_config *cfg = cmt->pdev->dev.platform_data;
struct resource *res, *res2;
struct device_node *np = cmt->pdev->dev.of_node;
/* map memory, let mapbase_ch point to our channel */
res = platform_get_resource(cmt->pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&cmt->pdev->dev, "failed to get I/O memory\n");
return -ENXIO;
}
cmt->mapbase_ch = ioremap_nocache(res->start, resource_size(res));
if (cmt->mapbase_ch == NULL) {
dev_err(&cmt->pdev->dev, "failed to remap I/O memory\n");
return -ENXIO;
}
/* optional resource for the shared timer start/stop register */
res2 = platform_get_resource(cmt->pdev, IORESOURCE_MEM, 1);
/* map second resource for CMSTR */
cmt->mapbase = ioremap_nocache(res2 ? res2->start :
res->start - cfg->channel_offset,
res2 ? resource_size(res2) : 2);
if (cmt->mapbase == NULL) {
dev_err(&cmt->pdev->dev, "failed to remap I/O second memory\n");
iounmap(cmt->mapbase_ch);
return -ENXIO;
}
/* identify the model based on the resources */
if (resource_size(res) == 6)
cmt->info = &sh_cmt_info[SH_CMT_16BIT];
else if (res2 && (resource_size(res2) == 4))
cmt->info = &sh_cmt_info[SH_CMT_48BIT_GEN2];
else
cmt->info = &sh_cmt_info[SH_CMT_32BIT];
return 0;
}
static void sh_cmt_unmap_memory(struct sh_cmt_device *cmt)
{
iounmap(cmt->mapbase);
if (cmt->mapbase_ch)
iounmap(cmt->mapbase_ch);
return of_property_read_u32(np, "renesas,channels-mask",
&cmt->hw_channels);
}
static int sh_cmt_setup(struct sh_cmt_device *cmt, struct platform_device *pdev)
{
struct sh_timer_config *cfg = pdev->dev.platform_data;
const struct platform_device_id *id = pdev->id_entry;
unsigned int hw_channels;
unsigned int mask;
unsigned int i;
int ret;
memset(cmt, 0, sizeof(*cmt));
cmt->pdev = pdev;
raw_spin_lock_init(&cmt->lock);
if (!cfg) {
if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
const struct of_device_id *id;
id = of_match_node(sh_cmt_of_table, pdev->dev.of_node);
cmt->info = id->data;
ret = sh_cmt_parse_dt(cmt);
if (ret < 0)
return ret;
} else if (pdev->dev.platform_data) {
struct sh_timer_config *cfg = pdev->dev.platform_data;
const struct platform_device_id *id = pdev->id_entry;
cmt->info = (const struct sh_cmt_info *)id->driver_data;
cmt->hw_channels = cfg->channels_mask;
} else {
dev_err(&cmt->pdev->dev, "missing platform data\n");
return -ENXIO;
}
cmt->info = (const struct sh_cmt_info *)id->driver_data;
cmt->legacy = cmt->info ? false : true;
/* Get hold of clock. */
cmt->clk = clk_get(&cmt->pdev->dev, cmt->legacy ? "cmt_fck" : "fck");
cmt->clk = clk_get(&cmt->pdev->dev, "fck");
if (IS_ERR(cmt->clk)) {
dev_err(&cmt->pdev->dev, "cannot get clock\n");
return PTR_ERR(cmt->clk);
@ -1016,28 +994,13 @@ static int sh_cmt_setup(struct sh_cmt_device *cmt, struct platform_device *pdev)
if (ret < 0)
goto err_clk_put;
/*
* Map the memory resource(s). We need to support both the legacy
* platform device configuration (with one device per channel) and the
* new version (with multiple channels per device).
*/
if (cmt->legacy)
ret = sh_cmt_map_memory_legacy(cmt);
else
ret = sh_cmt_map_memory(cmt);
/* Map the memory resource(s). */
ret = sh_cmt_map_memory(cmt);
if (ret < 0)
goto err_clk_unprepare;
/* Allocate and setup the channels. */
if (cmt->legacy) {
cmt->num_channels = 1;
hw_channels = 0;
} else {
cmt->num_channels = hweight8(cfg->channels_mask);
hw_channels = cfg->channels_mask;
}
cmt->num_channels = hweight8(cmt->hw_channels);
cmt->channels = kzalloc(cmt->num_channels * sizeof(*cmt->channels),
GFP_KERNEL);
if (cmt->channels == NULL) {
@ -1045,35 +1008,21 @@ static int sh_cmt_setup(struct sh_cmt_device *cmt, struct platform_device *pdev)
goto err_unmap;
}
if (cmt->legacy) {
ret = sh_cmt_setup_channel(&cmt->channels[0],
cfg->timer_bit, cfg->timer_bit,
cfg->clockevent_rating != 0,
cfg->clocksource_rating != 0, cmt);
/*
* Use the first channel as a clock event device and the second channel
* as a clock source. If only one channel is available use it for both.
*/
for (i = 0, mask = cmt->hw_channels; i < cmt->num_channels; ++i) {
unsigned int hwidx = ffs(mask) - 1;
bool clocksource = i == 1 || cmt->num_channels == 1;
bool clockevent = i == 0;
ret = sh_cmt_setup_channel(&cmt->channels[i], i, hwidx,
clockevent, clocksource, cmt);
if (ret < 0)
goto err_unmap;
} else {
unsigned int mask = hw_channels;
unsigned int i;
/*
* Use the first channel as a clock event device and the second
* channel as a clock source. If only one channel is available
* use it for both.
*/
for (i = 0; i < cmt->num_channels; ++i) {
unsigned int hwidx = ffs(mask) - 1;
bool clocksource = i == 1 || cmt->num_channels == 1;
bool clockevent = i == 0;
ret = sh_cmt_setup_channel(&cmt->channels[i], i, hwidx,
clockevent, clocksource,
cmt);
if (ret < 0)
goto err_unmap;
mask &= ~(1 << hwidx);
}
mask &= ~(1 << hwidx);
}
platform_set_drvdata(pdev, cmt);
@ -1082,7 +1031,7 @@ static int sh_cmt_setup(struct sh_cmt_device *cmt, struct platform_device *pdev)
err_unmap:
kfree(cmt->channels);
sh_cmt_unmap_memory(cmt);
iounmap(cmt->mapbase);
err_clk_unprepare:
clk_unprepare(cmt->clk);
err_clk_put:
@ -1132,22 +1081,12 @@ static int sh_cmt_remove(struct platform_device *pdev)
return -EBUSY; /* cannot unregister clockevent and clocksource */
}
static const struct platform_device_id sh_cmt_id_table[] = {
{ "sh_cmt", 0 },
{ "sh-cmt-16", (kernel_ulong_t)&sh_cmt_info[SH_CMT_16BIT] },
{ "sh-cmt-32", (kernel_ulong_t)&sh_cmt_info[SH_CMT_32BIT] },
{ "sh-cmt-32-fast", (kernel_ulong_t)&sh_cmt_info[SH_CMT_32BIT_FAST] },
{ "sh-cmt-48", (kernel_ulong_t)&sh_cmt_info[SH_CMT_48BIT] },
{ "sh-cmt-48-gen2", (kernel_ulong_t)&sh_cmt_info[SH_CMT_48BIT_GEN2] },
{ }
};
MODULE_DEVICE_TABLE(platform, sh_cmt_id_table);
static struct platform_driver sh_cmt_device_driver = {
.probe = sh_cmt_probe,
.remove = sh_cmt_remove,
.driver = {
.name = "sh_cmt",
.of_match_table = of_match_ptr(sh_cmt_of_table),
},
.id_table = sh_cmt_id_table,
};

148
drivers/clocksource/sh_mtu2.c
View file

@ -23,6 +23,7 @@
#include <linux/ioport.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/pm_runtime.h>
@ -37,7 +38,6 @@ struct sh_mtu2_channel {
unsigned int index;
void __iomem *base;
int irq;
struct clock_event_device ced;
};
@ -48,15 +48,14 @@ struct sh_mtu2_device {
void __iomem *mapbase;
struct clk *clk;
raw_spinlock_t lock; /* Protect the shared registers */
struct sh_mtu2_channel *channels;
unsigned int num_channels;
bool legacy;
bool has_clockevent;
};
static DEFINE_RAW_SPINLOCK(sh_mtu2_lock);
#define TSTR -1 /* shared register */
#define TCR 0 /* channel register */
#define TMDR 1 /* channel register */
@ -162,12 +161,8 @@ static inline unsigned long sh_mtu2_read(struct sh_mtu2_channel *ch, int reg_nr)
{
unsigned long offs;
if (reg_nr == TSTR) {
if (ch->mtu->legacy)
return ioread8(ch->mtu->mapbase);
else
return ioread8(ch->mtu->mapbase + 0x280);
}
if (reg_nr == TSTR)
return ioread8(ch->mtu->mapbase + 0x280);
offs = mtu2_reg_offs[reg_nr];
@ -182,12 +177,8 @@ static inline void sh_mtu2_write(struct sh_mtu2_channel *ch, int reg_nr,
{
unsigned long offs;
if (reg_nr == TSTR) {
if (ch->mtu->legacy)
return iowrite8(value, ch->mtu->mapbase);
else
return iowrite8(value, ch->mtu->mapbase + 0x280);
}
if (reg_nr == TSTR)
return iowrite8(value, ch->mtu->mapbase + 0x280);
offs = mtu2_reg_offs[reg_nr];
@ -202,7 +193,7 @@ static void sh_mtu2_start_stop_ch(struct sh_mtu2_channel *ch, int start)
unsigned long flags, value;
/* start stop register shared by multiple timer channels */
raw_spin_lock_irqsave(&sh_mtu2_lock, flags);
raw_spin_lock_irqsave(&ch->mtu->lock, flags);
value = sh_mtu2_read(ch, TSTR);
if (start)
@ -211,7 +202,7 @@ static void sh_mtu2_start_stop_ch(struct sh_mtu2_channel *ch, int start)
value &= ~(1 << ch->index);
sh_mtu2_write(ch, TSTR, value);
raw_spin_unlock_irqrestore(&sh_mtu2_lock, flags);
raw_spin_unlock_irqrestore(&ch->mtu->lock, flags);
}
static int sh_mtu2_enable(struct sh_mtu2_channel *ch)
@ -331,7 +322,6 @@ static void sh_mtu2_register_clockevent(struct sh_mtu2_channel *ch,
const char *name)
{
struct clock_event_device *ced = &ch->ced;
int ret;
ced->name = name;
ced->features = CLOCK_EVT_FEAT_PERIODIC;
@ -344,24 +334,12 @@ static void sh_mtu2_register_clockevent(struct sh_mtu2_channel *ch,
dev_info(&ch->mtu->pdev->dev, "ch%u: used for clock events\n",
ch->index);
clockevents_register_device(ced);
ret = request_irq(ch->irq, sh_mtu2_interrupt,
IRQF_TIMER | IRQF_IRQPOLL | IRQF_NOBALANCING,
dev_name(&ch->mtu->pdev->dev), ch);
if (ret) {
dev_err(&ch->mtu->pdev->dev, "ch%u: failed to request irq %d\n",
ch->index, ch->irq);
return;
}
}
static int sh_mtu2_register(struct sh_mtu2_channel *ch, const char *name,
bool clockevent)
static int sh_mtu2_register(struct sh_mtu2_channel *ch, const char *name)
{
if (clockevent) {
ch->mtu->has_clockevent = true;
sh_mtu2_register_clockevent(ch, name);
}
ch->mtu->has_clockevent = true;
sh_mtu2_register_clockevent(ch, name);
return 0;
}
@ -372,40 +350,32 @@ static int sh_mtu2_setup_channel(struct sh_mtu2_channel *ch, unsigned int index,
static const unsigned int channel_offsets[] = {
0x300, 0x380, 0x000,
};
bool clockevent;
char name[6];
int irq;
int ret;
ch->mtu = mtu;
if (mtu->legacy) {
struct sh_timer_config *cfg = mtu->pdev->dev.platform_data;
clockevent = cfg->clockevent_rating != 0;
ch->irq = platform_get_irq(mtu->pdev, 0);
ch->base = mtu->mapbase - cfg->channel_offset;
ch->index = cfg->timer_bit;
} else {
char name[6];
clockevent = true;
sprintf(name, "tgi%ua", index);
ch->irq = platform_get_irq_byname(mtu->pdev, name);
ch->base = mtu->mapbase + channel_offsets[index];
ch->index = index;
}
if (ch->irq < 0) {
sprintf(name, "tgi%ua", index);
irq = platform_get_irq_byname(mtu->pdev, name);
if (irq < 0) {
/* Skip channels with no declared interrupt. */
if (!mtu->legacy)
return 0;
dev_err(&mtu->pdev->dev, "ch%u: failed to get irq\n",
ch->index);
return ch->irq;
return 0;
}
return sh_mtu2_register(ch, dev_name(&mtu->pdev->dev), clockevent);
ret = request_irq(irq, sh_mtu2_interrupt,
IRQF_TIMER | IRQF_IRQPOLL | IRQF_NOBALANCING,
dev_name(&ch->mtu->pdev->dev), ch);
if (ret) {
dev_err(&ch->mtu->pdev->dev, "ch%u: failed to request irq %d\n",
index, irq);
return ret;
}
ch->base = mtu->mapbase + channel_offsets[index];
ch->index = index;
return sh_mtu2_register(ch, dev_name(&mtu->pdev->dev));
}
static int sh_mtu2_map_memory(struct sh_mtu2_device *mtu)
@ -422,46 +392,21 @@ static int sh_mtu2_map_memory(struct sh_mtu2_device *mtu)
if (mtu->mapbase == NULL)
return -ENXIO;
/*
* In legacy platform device configuration (with one device per channel)
* the resource points to the channel base address.
*/
if (mtu->legacy) {
struct sh_timer_config *cfg = mtu->pdev->dev.platform_data;
mtu->mapbase += cfg->channel_offset;
}
return 0;
}
static void sh_mtu2_unmap_memory(struct sh_mtu2_device *mtu)
{
if (mtu->legacy) {
struct sh_timer_config *cfg = mtu->pdev->dev.platform_data;
mtu->mapbase -= cfg->channel_offset;
}
iounmap(mtu->mapbase);
}
static int sh_mtu2_setup(struct sh_mtu2_device *mtu,
struct platform_device *pdev)
{
struct sh_timer_config *cfg = pdev->dev.platform_data;
const struct platform_device_id *id = pdev->id_entry;
unsigned int i;
int ret;
mtu->pdev = pdev;
mtu->legacy = id->driver_data;
if (mtu->legacy && !cfg) {
dev_err(&mtu->pdev->dev, "missing platform data\n");
return -ENXIO;
}
raw_spin_lock_init(&mtu->lock);
/* Get hold of clock. */
mtu->clk = clk_get(&mtu->pdev->dev, mtu->legacy ? "mtu2_fck" : "fck");
mtu->clk = clk_get(&mtu->pdev->dev, "fck");
if (IS_ERR(mtu->clk)) {
dev_err(&mtu->pdev->dev, "cannot get clock\n");
return PTR_ERR(mtu->clk);
@ -479,10 +424,7 @@ static int sh_mtu2_setup(struct sh_mtu2_device *mtu,
}
/* Allocate and setup the channels. */
if (mtu->legacy)
mtu->num_channels = 1;
else
mtu->num_channels = 3;
mtu->num_channels = 3;
mtu->channels = kzalloc(sizeof(*mtu->channels) * mtu->num_channels,
GFP_KERNEL);
@ -491,16 +433,10 @@ static int sh_mtu2_setup(struct sh_mtu2_device *mtu,
goto err_unmap;
}
if (mtu->legacy) {
ret = sh_mtu2_setup_channel(&mtu->channels[0], 0, mtu);
for (i = 0; i < mtu->num_channels; ++i) {
ret = sh_mtu2_setup_channel(&mtu->channels[i], i, mtu);
if (ret < 0)
goto err_unmap;
} else {
for (i = 0; i < mtu->num_channels; ++i) {
ret = sh_mtu2_setup_channel(&mtu->channels[i], i, mtu);
if (ret < 0)
goto err_unmap;
}
}
platform_set_drvdata(pdev, mtu);
@ -509,7 +445,7 @@ static int sh_mtu2_setup(struct sh_mtu2_device *mtu,
err_unmap:
kfree(mtu->channels);
sh_mtu2_unmap_memory(mtu);
iounmap(mtu->mapbase);
err_clk_unprepare:
clk_unprepare(mtu->clk);
err_clk_put:
@ -560,17 +496,23 @@ static int sh_mtu2_remove(struct platform_device *pdev)
}
static const struct platform_device_id sh_mtu2_id_table[] = {
{ "sh_mtu2", 1 },
{ "sh-mtu2", 0 },
{ },
};
MODULE_DEVICE_TABLE(platform, sh_mtu2_id_table);
static const struct of_device_id sh_mtu2_of_table[] __maybe_unused = {
{ .compatible = "renesas,mtu2" },
{ }
};
MODULE_DEVICE_TABLE(of, sh_mtu2_of_table);
static struct platform_driver sh_mtu2_device_driver = {
.probe = sh_mtu2_probe,
.remove = sh_mtu2_remove,
.driver = {
.name = "sh_mtu2",
.of_match_table = of_match_ptr(sh_mtu2_of_table),
},
.id_table = sh_mtu2_id_table,
};

133
drivers/clocksource/sh_tmu.c
View file

@ -24,6 +24,7 @@
#include <linux/ioport.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_domain.h>
#include <linux/pm_runtime.h>
@ -32,7 +33,6 @@
#include <linux/spinlock.h>
enum sh_tmu_model {
SH_TMU_LEGACY,
SH_TMU,
SH_TMU_SH3,
};
@ -62,6 +62,8 @@ struct sh_tmu_device {
enum sh_tmu_model model;
raw_spinlock_t lock; /* Protect the shared start/stop register */
struct sh_tmu_channel *channels;
unsigned int num_channels;
@ -69,8 +71,6 @@ struct sh_tmu_device {
bool has_clocksource;
};
static DEFINE_RAW_SPINLOCK(sh_tmu_lock);
#define TSTR -1 /* shared register */
#define TCOR 0 /* channel register */
#define TCNT 1 /* channel register */
@ -91,8 +91,6 @@ static inline unsigned long sh_tmu_read(struct sh_tmu_channel *ch, int reg_nr)
if (reg_nr == TSTR) {
switch (ch->tmu->model) {
case SH_TMU_LEGACY:
return ioread8(ch->tmu->mapbase);
case SH_TMU_SH3:
return ioread8(ch->tmu->mapbase + 2);
case SH_TMU:
@ -115,8 +113,6 @@ static inline void sh_tmu_write(struct sh_tmu_channel *ch, int reg_nr,
if (reg_nr == TSTR) {
switch (ch->tmu->model) {
case SH_TMU_LEGACY:
return iowrite8(value, ch->tmu->mapbase);
case SH_TMU_SH3:
return iowrite8(value, ch->tmu->mapbase + 2);
case SH_TMU:
@ -137,7 +133,7 @@ static void sh_tmu_start_stop_ch(struct sh_tmu_channel *ch, int start)
unsigned long flags, value;
/* start stop register shared by multiple timer channels */
raw_spin_lock_irqsave(&sh_tmu_lock, flags);
raw_spin_lock_irqsave(&ch->tmu->lock, flags);
value = sh_tmu_read(ch, TSTR);
if (start)
@ -146,7 +142,7 @@ static void sh_tmu_start_stop_ch(struct sh_tmu_channel *ch, int start)
value &= ~(1 << ch->index);
sh_tmu_write(ch, TSTR, value);
raw_spin_unlock_irqrestore(&sh_tmu_lock, flags);
raw_spin_unlock_irqrestore(&ch->tmu->lock, flags);
}
static int __sh_tmu_enable(struct sh_tmu_channel *ch)
@ -476,27 +472,12 @@ static int sh_tmu_channel_setup(struct sh_tmu_channel *ch, unsigned int index,
return 0;
ch->tmu = tmu;
ch->index = index;
if (tmu->model == SH_TMU_LEGACY) {
struct sh_timer_config *cfg = tmu->pdev->dev.platform_data;
/*
* The SH3 variant (SH770x, SH7705, SH7710 and SH7720) maps
* channel registers blocks at base + 2 + 12 * index, while all
* other variants map them at base + 4 + 12 * index. We can
* compute the index by just dividing by 12, the 2 bytes or 4
* bytes offset being hidden by the integer division.
*/
ch->index = cfg->channel_offset / 12;
ch->base = tmu->mapbase + cfg->channel_offset;
} else {
ch->index = index;
if (tmu->model == SH_TMU_SH3)
ch->base = tmu->mapbase + 4 + ch->index * 12;
else
ch->base = tmu->mapbase + 8 + ch->index * 12;
}
if (tmu->model == SH_TMU_SH3)
ch->base = tmu->mapbase + 4 + ch->index * 12;
else
ch->base = tmu->mapbase + 8 + ch->index * 12;
ch->irq = platform_get_irq(tmu->pdev, index);
if (ch->irq < 0) {
@ -526,46 +507,53 @@ static int sh_tmu_map_memory(struct sh_tmu_device *tmu)
if (tmu->mapbase == NULL)
return -ENXIO;
/*
* In legacy platform device configuration (with one device per channel)
* the resource points to the channel base address.
*/
if (tmu->model == SH_TMU_LEGACY) {
struct sh_timer_config *cfg = tmu->pdev->dev.platform_data;
tmu->mapbase -= cfg->channel_offset;
return 0;
}
static int sh_tmu_parse_dt(struct sh_tmu_device *tmu)
{
struct device_node *np = tmu->pdev->dev.of_node;
tmu->model = SH_TMU;
tmu->num_channels = 3;
of_property_read_u32(np, "#renesas,channels", &tmu->num_channels);
if (tmu->num_channels != 2 && tmu->num_channels != 3) {
dev_err(&tmu->pdev->dev, "invalid number of channels %u\n",
tmu->num_channels);
return -EINVAL;
}
return 0;
}
static void sh_tmu_unmap_memory(struct sh_tmu_device *tmu)
{
if (tmu->model == SH_TMU_LEGACY) {
struct sh_timer_config *cfg = tmu->pdev->dev.platform_data;
tmu->mapbase += cfg->channel_offset;
}
iounmap(tmu->mapbase);
}
static int sh_tmu_setup(struct sh_tmu_device *tmu, struct platform_device *pdev)
{
struct sh_timer_config *cfg = pdev->dev.platform_data;
const struct platform_device_id *id = pdev->id_entry;
unsigned int i;
int ret;
if (!cfg) {
tmu->pdev = pdev;
raw_spin_lock_init(&tmu->lock);
if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node) {
ret = sh_tmu_parse_dt(tmu);
if (ret < 0)
return ret;
} else if (pdev->dev.platform_data) {
const struct platform_device_id *id = pdev->id_entry;
struct sh_timer_config *cfg = pdev->dev.platform_data;
tmu->model = id->driver_data;
tmu->num_channels = hweight8(cfg->channels_mask);
} else {
dev_err(&tmu->pdev->dev, "missing platform data\n");
return -ENXIO;
}
tmu->pdev = pdev;
tmu->model = id->driver_data;
/* Get hold of clock. */
tmu->clk = clk_get(&tmu->pdev->dev,
tmu->model == SH_TMU_LEGACY ? "tmu_fck" : "fck");
tmu->clk = clk_get(&tmu->pdev->dev, "fck");
if (IS_ERR(tmu->clk)) {
dev_err(&tmu->pdev->dev, "cannot get clock\n");
return PTR_ERR(tmu->clk);
@ -583,11 +571,6 @@ static int sh_tmu_setup(struct sh_tmu_device *tmu, struct platform_device *pdev)
}
/* Allocate and setup the channels. */
if (tmu->model == SH_TMU_LEGACY)
tmu->num_channels = 1;
else
tmu->num_channels = hweight8(cfg->channels_mask);
tmu->channels = kzalloc(sizeof(*tmu->channels) * tmu->num_channels,
GFP_KERNEL);
if (tmu->channels == NULL) {
@ -595,23 +578,15 @@ static int sh_tmu_setup(struct sh_tmu_device *tmu, struct platform_device *pdev)
goto err_unmap;
}
if (tmu->model == SH_TMU_LEGACY) {
ret = sh_tmu_channel_setup(&tmu->channels[0], 0,
cfg->clockevent_rating != 0,
cfg->clocksource_rating != 0, tmu);
/*
* Use the first channel as a clock event device and the second channel
* as a clock source.
*/
for (i = 0; i < tmu->num_channels; ++i) {
ret = sh_tmu_channel_setup(&tmu->channels[i], i,
i == 0, i == 1, tmu);
if (ret < 0)
goto err_unmap;
} else {
/*
* Use the first channel as a clock event device and the second
* channel as a clock source.
*/
for (i = 0; i < tmu->num_channels; ++i) {
ret = sh_tmu_channel_setup(&tmu->channels[i], i,
i == 0, i == 1, tmu);
if (ret < 0)
goto err_unmap;
}
}
platform_set_drvdata(pdev, tmu);
@ -620,7 +595,7 @@ static int sh_tmu_setup(struct sh_tmu_device *tmu, struct platform_device *pdev)
err_unmap:
kfree(tmu->channels);
sh_tmu_unmap_memory(tmu);
iounmap(tmu->mapbase);
err_clk_unprepare:
clk_unprepare(tmu->clk);
err_clk_put:
@ -671,18 +646,24 @@ static int sh_tmu_remove(struct platform_device *pdev)
}
static const struct platform_device_id sh_tmu_id_table[] = {
{ "sh_tmu", SH_TMU_LEGACY },
{ "sh-tmu", SH_TMU },
{ "sh-tmu-sh3", SH_TMU_SH3 },
{ }
};
MODULE_DEVICE_TABLE(platform, sh_tmu_id_table);
static const struct of_device_id sh_tmu_of_table[] __maybe_unused = {
{ .compatible = "renesas,tmu" },
{ }
};
MODULE_DEVICE_TABLE(of, sh_tmu_of_table);
static struct platform_driver sh_tmu_device_driver = {
.probe = sh_tmu_probe,
.remove = sh_tmu_remove,
.driver = {
.name = "sh_tmu",
.of_match_table = of_match_ptr(sh_tmu_of_table),
},
.id_table = sh_tmu_id_table,
};

5
include/linux/sh_timer.h
View file

@ -2,11 +2,6 @@
#define __SH_TIMER_H__
struct sh_timer_config {
char *name;
long channel_offset;
int timer_bit;
unsigned long clockevent_rating;
unsigned long clocksource_rating;
unsigned int channels_mask;
};