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Date: Wed, 19 Jun 2013 19:35:52 -0400
From: Eduardo Valentin <eduardo.valentin@...com>
To: Amit Daniel Kachhap <amit.daniel@...sung.com>
CC: <linux-pm@...r.kernel.org>, Zhang Rui <rui.zhang@...el.com>,
Eduardo Valentin <eduardo.valentin@...com>,
<linux-samsung-soc@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <amit.kachhap@...il.com>,
Kukjin Kim <kgene.kim@...sung.com>, <jonghwa3.lee@...sung.com>
Subject: Re: [PATCH V6 19/30] thermal: exynos: Add TMU features to check instead
of using SOC type
On 17-06-2013 02:46, Amit Daniel Kachhap wrote:
> This patch adds several features supported by TMU as bitfields.
> This features varies across different SOC type and comparing
> the features present in the TMU is more logical than comparing
> the soc itself.
>
> 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>
Acked-by: Eduardo Valentin <eduardo.valentin@...com>
> ---
> drivers/thermal/samsung/exynos_tmu.c | 26 +++++++++++++++---------
> drivers/thermal/samsung/exynos_tmu.h | 31 +++++++++++++++++++++++++++++
> drivers/thermal/samsung/exynos_tmu_data.c | 6 ++++-
> 3 files changed, 52 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
> index 1880c4e..877dab8 100644
> --- a/drivers/thermal/samsung/exynos_tmu.c
> +++ b/drivers/thermal/samsung/exynos_tmu.c
> @@ -142,13 +142,15 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
> mutex_lock(&data->lock);
> clk_enable(data->clk);
>
> - status = readb(data->base + reg->tmu_status);
> - if (!status) {
> - ret = -EBUSY;
> - goto out;
> + if (TMU_SUPPORTS(pdata, READY_STATUS)) {
> + status = readb(data->base + reg->tmu_status);
> + if (!status) {
> + ret = -EBUSY;
> + goto out;
> + }
> }
>
> - if (data->soc == SOC_ARCH_EXYNOS)
> + if (TMU_SUPPORTS(pdata, TRIM_RELOAD))
> __raw_writel(1, data->base + reg->triminfo_ctrl);
>
> /* Save trimming info in order to perform calibration */
> @@ -287,7 +289,7 @@ static void exynos_tmu_control(struct platform_device *pdev, bool on)
> pdata->trigger_enable[2] << reg->inten_rise2_shift |
> pdata->trigger_enable[1] << reg->inten_rise1_shift |
> pdata->trigger_enable[0] << reg->inten_rise0_shift;
> - if (pdata->threshold_falling)
> + if (TMU_SUPPORTS(pdata, FALLING_TRIP))
> interrupt_en |=
> interrupt_en << reg->inten_fall0_shift;
> } else {
> @@ -329,7 +331,7 @@ static int exynos_tmu_set_emulation(void *drv_data, unsigned long temp)
> unsigned int val;
> int ret = -EINVAL;
>
> - if (data->soc == SOC_ARCH_EXYNOS4210)
> + if (!TMU_SUPPORTS(pdata, EMULATION))
> goto out;
>
> if (temp && temp < MCELSIUS)
> @@ -343,9 +345,13 @@ static int exynos_tmu_set_emulation(void *drv_data, unsigned long temp)
> if (temp) {
> temp /= MCELSIUS;
>
> - val = (EXYNOS_EMUL_TIME << reg->emul_time_shift) |
> - (temp_to_code(data, temp)
> - << reg->emul_temp_shift) | EXYNOS_EMUL_ENABLE;
> + if (TMU_SUPPORTS(pdata, EMUL_TIME)) {
> + val &= ~(EXYNOS_EMUL_TIME_MASK << reg->emul_time_shift);
> + val |= (EXYNOS_EMUL_TIME << reg->emul_time_shift);
> + }
> + val &= ~(EXYNOS_EMUL_DATA_MASK << reg->emul_temp_shift);
> + val |= (temp_to_code(data, temp) << reg->emul_temp_shift) |
> + EXYNOS_EMUL_ENABLE;
> } else {
> val &= ~EXYNOS_EMUL_ENABLE;
> }
> diff --git a/drivers/thermal/samsung/exynos_tmu.h b/drivers/thermal/samsung/exynos_tmu.h
> index b614407..6f55673 100644
> --- a/drivers/thermal/samsung/exynos_tmu.h
> +++ b/drivers/thermal/samsung/exynos_tmu.h
> @@ -41,6 +41,34 @@ enum soc_type {
> };
>
> /**
> + * EXYNOS TMU supported features.
> + * TMU_SUPPORT_EMULATION - This features is used to set user defined
> + * temperature to the TMU controller.
> + * TMU_SUPPORT_MULTI_INST - This features denotes that the soc
> + * has many instances of TMU.
> + * TMU_SUPPORT_TRIM_RELOAD - This features shows that trimming can
> + * be reloaded.
> + * TMU_SUPPORT_FALLING_TRIP - This features shows that interrupt can
> + * be registered for falling trips also.
> + * TMU_SUPPORT_READY_STATUS - This feature tells that the TMU current
> + * state(active/idle) can be checked.
> + * TMU_SUPPORT_EMUL_TIME - This features allows to set next temp emulation
> + * sample time.
> + * TMU_SUPPORT_SHARED_MEMORY - This feature tells that the different TMU
> + * sensors shares some common registers.
> + * TMU_SUPPORT - macro to compare the above features with the supplied.
> + */
> +#define TMU_SUPPORT_EMULATION BIT(0)
> +#define TMU_SUPPORT_MULTI_INST BIT(1)
> +#define TMU_SUPPORT_TRIM_RELOAD BIT(2)
> +#define TMU_SUPPORT_FALLING_TRIP BIT(3)
> +#define TMU_SUPPORT_READY_STATUS BIT(4)
> +#define TMU_SUPPORT_EMUL_TIME BIT(5)
> +#define TMU_SUPPORT_SHARED_MEMORY BIT(6)
> +
> +#define TMU_SUPPORTS(a, b) (a->features & TMU_SUPPORT_ ## b)
> +
> +/**
> * struct exynos_tmu_register - register descriptors to access registers and
> * bitfields. The register validity, offsets and bitfield values may vary
> * slightly across different exynos SOC's.
> @@ -220,6 +248,8 @@ struct exynos_tmu_registers {
> * applicable to only some of the trigger levels.
> * @registers: Pointer to structure containing all the TMU controller registers
> * and bitfields shifts and masks.
> + * @features: a bitfield value indicating the features supported in SOC like
> + * emulation, multi instance etc
> *
> * This structure is required for configuration of exynos_tmu driver.
> */
> @@ -247,6 +277,7 @@ struct exynos_tmu_platform_data {
> struct freq_clip_table freq_tab[4];
> unsigned int freq_tab_count;
> const struct exynos_tmu_registers *registers;
> + unsigned int features;
> };
>
> /**
> diff --git a/drivers/thermal/samsung/exynos_tmu_data.c b/drivers/thermal/samsung/exynos_tmu_data.c
> index 06ecfb0..694557e 100644
> --- a/drivers/thermal/samsung/exynos_tmu_data.c
> +++ b/drivers/thermal/samsung/exynos_tmu_data.c
> @@ -83,6 +83,7 @@ struct exynos_tmu_init_data const exynos4210_default_tmu_data = {
> .freq_tab_count = 2,
> .type = SOC_ARCH_EXYNOS4210,
> .registers = &exynos4210_tmu_registers,
> + .features = TMU_SUPPORT_READY_STATUS,
> },
> },
> .tmu_count = 1,
> @@ -162,7 +163,10 @@ static const struct exynos_tmu_registers exynos5250_tmu_registers = {
> }, \
> .freq_tab_count = 2, \
> .type = SOC_ARCH_EXYNOS, \
> - .registers = &exynos5250_tmu_registers,
> + .registers = &exynos5250_tmu_registers, \
> + .features = (TMU_SUPPORT_EMULATION | TMU_SUPPORT_TRIM_RELOAD | \
> + TMU_SUPPORT_FALLING_TRIP | TMU_SUPPORT_READY_STATUS | \
> + TMU_SUPPORT_EMUL_TIME)
>
> struct exynos_tmu_init_data const exynos5250_default_tmu_data = {
> .tmu_data = {
>
--
You have got to be excited about what you are doing. (L. Lamport)
Eduardo Valentin
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