Skip to content

Commit

Permalink
thermal: exynos: fix IRQ clearing on TMU initialization
Browse files Browse the repository at this point in the history 
* Factor out code for clearing raised IRQs from exynos_tmu_work() to
  exynos_tmu_clear_irqs().

* Add a comment about documentation bugs to exynos_tmu_clear_irqs().

  [ The documentation for Exynos3250, Exynos4412, Exynos5250 and
    Exynos5260 incorrectly states that INTCLEAR register has
    a different placing of bits responsible for FALL IRQs than
    INTSTAT register.  Exynos5420 and Exynos5440 documentation is
    correct (Exynos4210 doesn't support FALL IRQs at all). ]

* Use exynos_tmu_clear_irqs() in exynos_tmu_initialize() instead
  of open-coded code trying to clear IRQs according to predefined
  masks.  After this change exynos_tmu_initialize() just clears
  IRQs that are raised like it is already done in exynos_tmu_work().

  As a nice side-effect the code now uses the correct offset
  (16 instead of 12) for bits responsible for clearing FALL IRQs
  in INTCLEAR register on Exynos3250, Exynos4412 and Exynos5250.

* Remove no longer needed intclr_rise_[mask,shift] and
  intclr_fall_[mask,shift] fields from struct exynos_tmu_registers.

* Remove no longer needed defines.

This patch has been tested on Exynos4412 and Exynos5420 SoCs.

Cc: Amit Daniel Kachhap <amit.daniel@samsung.com>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
  • Loading branch information
Bartlomiej Zolnierkiewicz authored and Eduardo Valentin committed Nov 3, 2014
1 parent c2aad93 commit b835ced
Show file tree
Hide file tree
Showing 4 changed files with 21 additions and 52 deletions.
29 changes: 21 additions & 8 deletions drivers/thermal/samsung/exynos_tmu.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -122,6 +122,23 @@ static int code_to_temp(struct exynos_tmu_data *data, u8 temp_code)
return temp;
}

static void exynos_tmu_clear_irqs(struct exynos_tmu_data *data)
{
const struct exynos_tmu_registers *reg = data->pdata->registers;
unsigned int val_irq;

val_irq = readl(data->base + reg->tmu_intstat);
/*
* Clear the interrupts. Please note that the documentation for
* Exynos3250, Exynos4412, Exynos5250 and Exynos5260 incorrectly
* states that INTCLEAR register has a different placing of bits
* responsible for FALL IRQs than INTSTAT register. Exynos5420
* and Exynos5440 documentation is correct (Exynos4210 doesn't
* support FALL IRQs at all).
*/
writel(val_irq, data->base + reg->tmu_intclear);
}

static int exynos_tmu_initialize(struct platform_device *pdev)
{
struct exynos_tmu_data *data = platform_get_drvdata(pdev);
Expand Down Expand Up @@ -207,7 +224,7 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
writeb(pdata->trigger_levels[i], data->base +
reg->threshold_th0 + i * sizeof(reg->threshold_th0));

writel(reg->intclr_rise_mask, data->base + reg->tmu_intclear);
exynos_tmu_clear_irqs(data);
} else {
/* Write temperature code for rising and falling threshold */
for (i = 0; i < pdata->non_hw_trigger_levels; i++) {
Expand All @@ -228,9 +245,7 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
writel(falling_threshold,
data->base + reg->threshold_th1);

writel((reg->intclr_rise_mask << reg->intclr_rise_shift) |
(reg->intclr_fall_mask << reg->intclr_fall_shift),
data->base + reg->tmu_intclear);
exynos_tmu_clear_irqs(data);

/* if last threshold limit is also present */
i = pdata->max_trigger_level - 1;
Expand Down Expand Up @@ -396,7 +411,7 @@ static void exynos_tmu_work(struct work_struct *work)
struct exynos_tmu_data, irq_work);
struct exynos_tmu_platform_data *pdata = data->pdata;
const struct exynos_tmu_registers *reg = pdata->registers;
unsigned int val_irq, val_type;
unsigned int val_type;

if (!IS_ERR(data->clk_sec))
clk_enable(data->clk_sec);
Expand All @@ -414,9 +429,7 @@ static void exynos_tmu_work(struct work_struct *work)
clk_enable(data->clk);

/* TODO: take action based on particular interrupt */
val_irq = readl(data->base + reg->tmu_intstat);
/* clear the interrupts */
writel(val_irq, data->base + reg->tmu_intclear);
exynos_tmu_clear_irqs(data);

clk_disable(data->clk);
mutex_unlock(&data->lock);
Expand Down
8 changes: 0 additions & 8 deletions drivers/thermal/samsung/exynos_tmu.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -100,10 +100,6 @@ enum soc_type {
* @inten_fall0_shift: shift bits of falling 0 interrupt bits.
* @tmu_intstat: Register containing the interrupt status values.
* @tmu_intclear: Register for clearing the raised interrupt status.
* @intclr_fall_shift: shift bits for interrupt clear fall 0
* @intclr_rise_shift: shift bits of all rising interrupt bits.
* @intclr_rise_mask: mask bits of all rising interrupt bits.
* @intclr_fall_mask: mask bits of all rising interrupt bits.
* @emul_con: TMU emulation controller register.
* @emul_temp_shift: shift bits of emulation temperature.
* @emul_time_shift: shift bits of emulation time.
Expand Down Expand Up @@ -143,10 +139,6 @@ struct exynos_tmu_registers {
u32 tmu_intstat;

u32 tmu_intclear;
u32 intclr_fall_shift;
u32 intclr_rise_shift;
u32 intclr_fall_mask;
u32 intclr_rise_mask;

u32 emul_con;
u32 emul_temp_shift;
Expand Down
21 changes: 0 additions & 21 deletions drivers/thermal/samsung/exynos_tmu_data.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -39,7 +39,6 @@ static const struct exynos_tmu_registers exynos4210_tmu_registers = {
.inten_rise3_shift = EXYNOS_TMU_INTEN_RISE3_SHIFT,
.tmu_intstat = EXYNOS_TMU_REG_INTSTAT,
.tmu_intclear = EXYNOS_TMU_REG_INTCLEAR,
.intclr_rise_mask = EXYNOS4210_TMU_TRIG_LEVEL_MASK,
};

struct exynos_tmu_init_data const exynos4210_default_tmu_data = {
Expand Down Expand Up @@ -106,10 +105,6 @@ static const struct exynos_tmu_registers exynos3250_tmu_registers = {
.inten_fall0_shift = EXYNOS_TMU_INTEN_FALL0_SHIFT,
.tmu_intstat = EXYNOS_TMU_REG_INTSTAT,
.tmu_intclear = EXYNOS_TMU_REG_INTCLEAR,
.intclr_fall_shift = EXYNOS_TMU_CLEAR_FALL_INT_SHIFT,
.intclr_rise_shift = EXYNOS_TMU_RISE_INT_SHIFT,
.intclr_rise_mask = EXYNOS_TMU_RISE_INT_MASK,
.intclr_fall_mask = EXYNOS_TMU_FALL_INT_MASK,
.emul_con = EXYNOS_EMUL_CON,
.emul_temp_shift = EXYNOS_EMUL_DATA_SHIFT,
.emul_time_shift = EXYNOS_EMUL_TIME_SHIFT,
Expand Down Expand Up @@ -193,10 +188,6 @@ static const struct exynos_tmu_registers exynos4412_tmu_registers = {
.inten_fall0_shift = EXYNOS_TMU_INTEN_FALL0_SHIFT,
.tmu_intstat = EXYNOS_TMU_REG_INTSTAT,
.tmu_intclear = EXYNOS_TMU_REG_INTCLEAR,
.intclr_fall_shift = EXYNOS_TMU_CLEAR_FALL_INT_SHIFT,
.intclr_rise_shift = EXYNOS_TMU_RISE_INT_SHIFT,
.intclr_rise_mask = EXYNOS_TMU_RISE_INT_MASK,
.intclr_fall_mask = EXYNOS_TMU_FALL_INT_MASK,
.emul_con = EXYNOS_EMUL_CON,
.emul_temp_shift = EXYNOS_EMUL_DATA_SHIFT,
.emul_time_shift = EXYNOS_EMUL_TIME_SHIFT,
Expand Down Expand Up @@ -289,10 +280,6 @@ static const struct exynos_tmu_registers exynos5260_tmu_registers = {
.inten_fall0_shift = EXYNOS_TMU_INTEN_FALL0_SHIFT,
.tmu_intstat = EXYNOS5260_TMU_REG_INTSTAT,
.tmu_intclear = EXYNOS5260_TMU_REG_INTCLEAR,
.intclr_fall_shift = EXYNOS5420_TMU_CLEAR_FALL_INT_SHIFT,
.intclr_rise_shift = EXYNOS_TMU_RISE_INT_SHIFT,
.intclr_rise_mask = EXYNOS5260_TMU_RISE_INT_MASK,
.intclr_fall_mask = EXYNOS5260_TMU_FALL_INT_MASK,
.emul_con = EXYNOS5260_EMUL_CON,
.emul_temp_shift = EXYNOS_EMUL_DATA_SHIFT,
.emul_time_shift = EXYNOS_EMUL_TIME_SHIFT,
Expand Down Expand Up @@ -373,10 +360,6 @@ static const struct exynos_tmu_registers exynos5420_tmu_registers = {
.inten_fall0_shift = EXYNOS_TMU_INTEN_FALL0_SHIFT,
.tmu_intstat = EXYNOS_TMU_REG_INTSTAT,
.tmu_intclear = EXYNOS_TMU_REG_INTCLEAR,
.intclr_fall_shift = EXYNOS5420_TMU_CLEAR_FALL_INT_SHIFT,
.intclr_rise_shift = EXYNOS_TMU_RISE_INT_SHIFT,
.intclr_rise_mask = EXYNOS_TMU_RISE_INT_MASK,
.intclr_fall_mask = EXYNOS_TMU_FALL_INT_MASK,
.emul_con = EXYNOS_EMUL_CON,
.emul_temp_shift = EXYNOS_EMUL_DATA_SHIFT,
.emul_time_shift = EXYNOS_EMUL_TIME_SHIFT,
Expand Down Expand Up @@ -465,10 +448,6 @@ static const struct exynos_tmu_registers exynos5440_tmu_registers = {
.inten_fall0_shift = EXYNOS5440_TMU_INTEN_FALL0_SHIFT,
.tmu_intstat = EXYNOS5440_TMU_S0_7_IRQ,
.tmu_intclear = EXYNOS5440_TMU_S0_7_IRQ,
.intclr_fall_shift = EXYNOS5440_TMU_CLEAR_FALL_INT_SHIFT,
.intclr_rise_shift = EXYNOS5440_TMU_RISE_INT_SHIFT,
.intclr_rise_mask = EXYNOS5440_TMU_RISE_INT_MASK,
.intclr_fall_mask = EXYNOS5440_TMU_FALL_INT_MASK,
.tmu_irqstatus = EXYNOS5440_TMU_IRQ_STATUS,
.emul_con = EXYNOS5440_TMU_S0_7_DEBUG,
.emul_temp_shift = EXYNOS_EMUL_DATA_SHIFT,
Expand Down
15 changes: 0 additions & 15 deletions drivers/thermal/samsung/exynos_tmu_data.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -46,8 +46,6 @@
#define EXYNOS4210_TMU_REG_THRESHOLD_TEMP 0x44
#define EXYNOS4210_TMU_REG_TRIG_LEVEL0 0x50

#define EXYNOS4210_TMU_TRIG_LEVEL_MASK 0x1111

/* Exynos5250, Exynos4412, Exynos3250 specific registers */
#define EXYNOS_TMU_TRIMINFO_CON2 0x14
#define EXYNOS_THD_TEMP_RISE 0x50
Expand All @@ -57,12 +55,6 @@
#define EXYNOS_TRIMINFO_RELOAD_ENABLE 1
#define EXYNOS_TRIMINFO_25_SHIFT 0
#define EXYNOS_TRIMINFO_85_SHIFT 8
#define EXYNOS_TMU_RISE_INT_MASK 0x111
#define EXYNOS_TMU_RISE_INT_SHIFT 0
#define EXYNOS_TMU_FALL_INT_MASK 0x111
#define EXYNOS_TMU_CLEAR_FALL_INT_SHIFT 12
#define EXYNOS5420_TMU_CLEAR_FALL_INT_SHIFT 16
#define EXYNOS5440_TMU_CLEAR_FALL_INT_SHIFT 4
#define EXYNOS_TMU_TRIP_MODE_SHIFT 13
#define EXYNOS_TMU_TRIP_MODE_MASK 0x7
#define EXYNOS_TMU_THERM_TRIP_EN_SHIFT 12
Expand All @@ -87,10 +79,6 @@
#define EXYNOS5260_TMU_REG_INTEN 0xC0
#define EXYNOS5260_TMU_REG_INTSTAT 0xC4
#define EXYNOS5260_TMU_REG_INTCLEAR 0xC8
#define EXYNOS5260_TMU_CLEAR_RISE_INT 0x1111
#define EXYNOS5260_TMU_CLEAR_FALL_INT (0x1111 << 16)
#define EXYNOS5260_TMU_RISE_INT_MASK 0x1111
#define EXYNOS5260_TMU_FALL_INT_MASK 0x1111
#define EXYNOS5260_EMUL_CON 0x100

/* Exynos4412 specific */
Expand All @@ -112,9 +100,6 @@
#define EXYNOS5440_TMU_IRQ_STATUS 0x000
#define EXYNOS5440_TMU_PMIN 0x004

#define EXYNOS5440_TMU_RISE_INT_MASK 0xf
#define EXYNOS5440_TMU_RISE_INT_SHIFT 0
#define EXYNOS5440_TMU_FALL_INT_MASK 0xf
#define EXYNOS5440_TMU_INTEN_RISE0_SHIFT 0
#define EXYNOS5440_TMU_INTEN_RISE1_SHIFT 1
#define EXYNOS5440_TMU_INTEN_RISE2_SHIFT 2
Expand Down

0 comments on commit b835ced

Please sign in to comment.