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Date: Fri, 21 Jun 2013 07:31:46 +0530
From: amit daniel kachhap <amit.daniel@...sung.com>
To: Eduardo Valentin <eduardo.valentin@...com>
Cc: linux-pm@...r.kernel.org, Zhang Rui <rui.zhang@...el.com>,
linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
Kukjin Kim <kgene.kim@...sung.com>, jonghwa3.lee@...sung.com
Subject: Re: [PATCH V6 08/30] thermal: exynos: Add missing definations and
code cleanup
Hi Eduardo,
On Thu, Jun 20, 2013 at 1:25 AM, Eduardo Valentin
<eduardo.valentin@...com> wrote:
> On 17-06-2013 02:46, Amit Daniel Kachhap wrote:
>> This patch adds some extra register bitfield definations and cleans
>> up the code to prepare for moving register macros and definations inside
>> the TMU data section.
>>
>> Acked-by: Kukjin Kim <kgene.kim@...sung.com>
>> Acked-by: Jonghwa Lee <jonghwa3.lee@...sung.com>
>> Signed-off-by: Amit Daniel Kachhap <amit.daniel@...sung.com>
>> ---
>> drivers/thermal/samsung/exynos_tmu.c | 62 +++++++++++++++++++++++++---------
>> 1 files changed, 46 insertions(+), 16 deletions(-)
>>
>> diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
>> index 5df04a1..fa33a48 100644
>> --- a/drivers/thermal/samsung/exynos_tmu.c
>> +++ b/drivers/thermal/samsung/exynos_tmu.c
>> @@ -43,9 +43,12 @@
>>
>> #define EXYNOS_TMU_TRIM_TEMP_MASK 0xff
>> #define EXYNOS_TMU_GAIN_SHIFT 8
>> +#define EXYNOS_TMU_GAIN_MASK 0xf
>> #define EXYNOS_TMU_REF_VOLTAGE_SHIFT 24
>> -#define EXYNOS_TMU_CORE_ON 3
>> -#define EXYNOS_TMU_CORE_OFF 2
>> +#define EXYNOS_TMU_REF_VOLTAGE_MASK 0x1f
>> +#define EXYNOS_TMU_BUF_SLOPE_SEL_MASK 0xf
>> +#define EXYNOS_TMU_BUF_SLOPE_SEL_SHIFT 8
>> +#define EXYNOS_TMU_CORE_EN_SHIFT 0
>> #define EXYNOS_TMU_DEF_CODE_TO_TEMP_OFFSET 50
>>
>> /* Exynos4210 specific registers */
>> @@ -63,6 +66,7 @@
>> #define EXYNOS4210_TMU_TRIG_LEVEL1_MASK 0x10
>> #define EXYNOS4210_TMU_TRIG_LEVEL2_MASK 0x100
>> #define EXYNOS4210_TMU_TRIG_LEVEL3_MASK 0x1000
>> +#define EXYNOS4210_TMU_TRIG_LEVEL_MASK 0x1111
>> #define EXYNOS4210_TMU_INTCLEAR_VAL 0x1111
>>
>> /* Exynos5250 and Exynos4412 specific registers */
>> @@ -72,17 +76,30 @@
>> #define EXYNOS_EMUL_CON 0x80
>>
>> #define EXYNOS_TRIMINFO_RELOAD 0x1
>> +#define EXYNOS_TRIMINFO_SHIFT 0x0
>> +#define EXYNOS_TMU_RISE_INT_MASK 0x111
>> +#define EXYNOS_TMU_RISE_INT_SHIFT 0
>> +#define EXYNOS_TMU_FALL_INT_MASK 0x111
>> +#define EXYNOS_TMU_FALL_INT_SHIFT 12
>> #define EXYNOS_TMU_CLEAR_RISE_INT 0x111
>> #define EXYNOS_TMU_CLEAR_FALL_INT (0x111 << 12)
>> -#define EXYNOS_MUX_ADDR_VALUE 6
>> -#define EXYNOS_MUX_ADDR_SHIFT 20
>> #define EXYNOS_TMU_TRIP_MODE_SHIFT 13
>> +#define EXYNOS_TMU_TRIP_MODE_MASK 0x7
>> +
>> +#define EXYNOS_TMU_INTEN_RISE0_SHIFT 0
>> +#define EXYNOS_TMU_INTEN_RISE1_SHIFT 4
>> +#define EXYNOS_TMU_INTEN_RISE2_SHIFT 8
>> +#define EXYNOS_TMU_INTEN_RISE3_SHIFT 12
>> +#define EXYNOS_TMU_INTEN_FALL0_SHIFT 16
>> +#define EXYNOS_TMU_INTEN_FALL1_SHIFT 20
>> +#define EXYNOS_TMU_INTEN_FALL2_SHIFT 24
>>
>> #define EFUSE_MIN_VALUE 40
>> #define EFUSE_MAX_VALUE 100
>>
>> #ifdef CONFIG_THERMAL_EMULATION
>> #define EXYNOS_EMUL_TIME 0x57F0
>> +#define EXYNOS_EMUL_TIME_MASK 0xffff
>> #define EXYNOS_EMUL_TIME_SHIFT 16
>> #define EXYNOS_EMUL_DATA_SHIFT 8
>> #define EXYNOS_EMUL_DATA_MASK 0xFF
>> @@ -261,24 +278,37 @@ static void exynos_tmu_control(struct platform_device *pdev, bool on)
>> mutex_lock(&data->lock);
>> clk_enable(data->clk);
>>
>> - con = pdata->reference_voltage << EXYNOS_TMU_REF_VOLTAGE_SHIFT |
>> - pdata->gain << EXYNOS_TMU_GAIN_SHIFT;
>> + con = readl(data->base + EXYNOS_TMU_REG_CONTROL);
>>
>> - if (data->soc == SOC_ARCH_EXYNOS) {
>> - con |= pdata->noise_cancel_mode << EXYNOS_TMU_TRIP_MODE_SHIFT;
>> - con |= (EXYNOS_MUX_ADDR_VALUE << EXYNOS_MUX_ADDR_SHIFT);
>> + if (pdata->reference_voltage) {
>> + con &= ~(EXYNOS_TMU_REF_VOLTAGE_MASK <<
>> + EXYNOS_TMU_REF_VOLTAGE_SHIFT);
>> + con |= pdata->reference_voltage << EXYNOS_TMU_REF_VOLTAGE_SHIFT;
>> + }
>> +
>> + if (pdata->gain) {
>> + con &= ~(EXYNOS_TMU_GAIN_MASK << EXYNOS_TMU_GAIN_SHIFT);
>> + con |= (pdata->gain << EXYNOS_TMU_GAIN_SHIFT);
>> + }
>> +
>> + if (pdata->noise_cancel_mode) {
>> + con &= ~(EXYNOS_TMU_TRIP_MODE_MASK <<
>> + EXYNOS_TMU_TRIP_MODE_SHIFT);
>> + con |= (pdata->noise_cancel_mode << EXYNOS_TMU_TRIP_MODE_SHIFT);
>> }
>>
>> if (on) {
>> - con |= EXYNOS_TMU_CORE_ON;
>
>
>
> Before, in order to turn core on you had:
> con = con | 3;
>
> now you do:
> con = con | (1 << 0);
>
> To me, before you would set bit 1 and 0, now you set bit 0.
>
>
>> - interrupt_en = pdata->trigger_level3_en << 12 |
>> - pdata->trigger_level2_en << 8 |
>> - pdata->trigger_level1_en << 4 |
>> - pdata->trigger_level0_en;
>> + con |= (1 << EXYNOS_TMU_CORE_EN_SHIFT);
>> + interrupt_en =
>> + pdata->trigger_level3_en << EXYNOS_TMU_INTEN_RISE3_SHIFT |
>> + pdata->trigger_level2_en << EXYNOS_TMU_INTEN_RISE2_SHIFT |
>> + pdata->trigger_level1_en << EXYNOS_TMU_INTEN_RISE1_SHIFT |
>> + pdata->trigger_level0_en << EXYNOS_TMU_INTEN_RISE0_SHIFT;
>> if (pdata->threshold_falling)
>> - interrupt_en |= interrupt_en << 16;
>> + interrupt_en |=
>> + interrupt_en << EXYNOS_TMU_INTEN_FALL0_SHIFT;
>> } else {
>> - con |= EXYNOS_TMU_CORE_OFF;
>> + con &= ~(1 << EXYNOS_TMU_CORE_EN_SHIFT);
>
>
> Before, in order to turno core off you had:
> con = con | 2;
>
> now you do:
> con = con & ~(1 << 0);
>
> To me, before you would set bit 2, now you clear bit 0.
>
> Using the approach on this patch looks correct to me if you have 1 bit
> core_en for instance.
>
> so, Is this a fix?
>
> Just to be clear, is this what you want ?
Yes you are right. Bit 0 is the actual enable bit. Bit 1 is the
reserve bit and its default value is 1. Earlier both bits are used to
turn on/off the controller which was wrong so this patch rectifies it.
Thanks,
Amit
>
>> interrupt_en = 0; /* Disable all interrupts */
>> }
>> writel(interrupt_en, data->base + EXYNOS_TMU_REG_INTEN);
>>
>
>
> --
> You have got to be excited about what you are doing. (L. Lamport)
>
> Eduardo Valentin
>
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