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SubjectRe: [PATCH 3/3] thermal: rockchip: don't pass table structs by value
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在 2016年11月19日 07:52, Brian Norris 写道:
> This driver passes struct chip_tsadc_table by value throughout; this is
> inefficient, and AFAICT, there is no reason for it. Let's pass pointers
> instead.
>
> Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Caesar Wang <wxt@rock-chips.com>
Tested-by: Caesar Wang <wxt@rock-chips.com>

Yup, that make sense to improve efficiency.
Thanks the fixes.

And tested on rk3399 evb board.

> ---
> drivers/thermal/rockchip_thermal.c | 80 +++++++++++++++++++-------------------
> 1 file changed, 40 insertions(+), 40 deletions(-)
>
> diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
> index 35554d146b9d..30fb95a0dff0 100644
> --- a/drivers/thermal/rockchip_thermal.c
> +++ b/drivers/thermal/rockchip_thermal.c
> @@ -118,11 +118,11 @@ struct rockchip_tsadc_chip {
> void (*control)(void __iomem *reg, bool on);
>
> /* Per-sensor methods */
> - int (*get_temp)(struct chip_tsadc_table table,
> + int (*get_temp)(const struct chip_tsadc_table *table,
> int chn, void __iomem *reg, int *temp);
> - void (*set_alarm_temp)(struct chip_tsadc_table table,
> + void (*set_alarm_temp)(const struct chip_tsadc_table *table,
> int chn, void __iomem *reg, int temp);
> - void (*set_tshut_temp)(struct chip_tsadc_table table,
> + void (*set_tshut_temp)(const struct chip_tsadc_table *table,
> int chn, void __iomem *reg, int temp);
> void (*set_tshut_mode)(int chn, void __iomem *reg, enum tshut_mode m);
>
> @@ -397,26 +397,26 @@ static const struct tsadc_table rk3399_code_table[] = {
> {TSADCV3_DATA_MASK, 125000},
> };
>
> -static u32 rk_tsadcv2_temp_to_code(struct chip_tsadc_table table,
> +static u32 rk_tsadcv2_temp_to_code(const struct chip_tsadc_table *table,
> int temp)
> {
> int high, low, mid;
> u32 error = 0;
>
> low = 0;
> - high = table.length - 1;
> + high = table->length - 1;
> mid = (high + low) / 2;
>
> /* Return mask code data when the temp is over table range */
> - if (temp < table.id[low].temp || temp > table.id[high].temp) {
> - error = table.data_mask;
> + if (temp < table->id[low].temp || temp > table->id[high].temp) {
> + error = table->data_mask;
> goto exit;
> }
>
> while (low <= high) {
> - if (temp == table.id[mid].temp)
> - return table.id[mid].code;
> - else if (temp < table.id[mid].temp)
> + if (temp == table->id[mid].temp)
> + return table->id[mid].code;
> + else if (temp < table->id[mid].temp)
> high = mid - 1;
> else
> low = mid + 1;
> @@ -429,28 +429,28 @@ static u32 rk_tsadcv2_temp_to_code(struct chip_tsadc_table table,
> return error;
> }
>
> -static int rk_tsadcv2_code_to_temp(struct chip_tsadc_table table, u32 code,
> - int *temp)
> +static int rk_tsadcv2_code_to_temp(const struct chip_tsadc_table *table,
> + u32 code, int *temp)
> {
> unsigned int low = 1;
> - unsigned int high = table.length - 1;
> + unsigned int high = table->length - 1;
> unsigned int mid = (low + high) / 2;
> unsigned int num;
> unsigned long denom;
>
> - WARN_ON(table.length < 2);
> + WARN_ON(table->length < 2);
>
> - switch (table.mode) {
> + switch (table->mode) {
> case ADC_DECREMENT:
> - code &= table.data_mask;
> - if (code < table.id[high].code)
> + code &= table->data_mask;
> + if (code < table->id[high].code)
> return -EAGAIN; /* Incorrect reading */
>
> while (low <= high) {
> - if (code >= table.id[mid].code &&
> - code < table.id[mid - 1].code)
> + if (code >= table->id[mid].code &&
> + code < table->id[mid - 1].code)
> break;
> - else if (code < table.id[mid].code)
> + else if (code < table->id[mid].code)
> low = mid + 1;
> else
> high = mid - 1;
> @@ -459,15 +459,15 @@ static int rk_tsadcv2_code_to_temp(struct chip_tsadc_table table, u32 code,
> }
> break;
> case ADC_INCREMENT:
> - code &= table.data_mask;
> - if (code < table.id[low].code)
> + code &= table->data_mask;
> + if (code < table->id[low].code)
> return -EAGAIN; /* Incorrect reading */
>
> while (low <= high) {
> - if (code <= table.id[mid].code &&
> - code > table.id[mid - 1].code)
> + if (code <= table->id[mid].code &&
> + code > table->id[mid - 1].code)
> break;
> - else if (code > table.id[mid].code)
> + else if (code > table->id[mid].code)
> low = mid + 1;
> else
> high = mid - 1;
> @@ -477,7 +477,7 @@ static int rk_tsadcv2_code_to_temp(struct chip_tsadc_table table, u32 code,
> break;
> default:
> pr_err("%s: invalid conversion table, mode=%d\n",
> - __func__, table.mode);
> + __func__, table->mode);
> return -EINVAL;
> }
>
> @@ -487,10 +487,10 @@ static int rk_tsadcv2_code_to_temp(struct chip_tsadc_table table, u32 code,
> * temperature between 2 table entries is linear and interpolate
> * to produce less granular result.
> */
> - num = table.id[mid].temp - table.id[mid - 1].temp;
> - num *= abs(table.id[mid - 1].code - code);
> - denom = abs(table.id[mid - 1].code - table.id[mid].code);
> - *temp = table.id[mid - 1].temp + (num / denom);
> + num = table->id[mid].temp - table->id[mid - 1].temp;
> + num *= abs(table->id[mid - 1].code - code);
> + denom = abs(table->id[mid - 1].code - table->id[mid].code);
> + *temp = table->id[mid - 1].temp + (num / denom);
>
> return 0;
> }
> @@ -646,7 +646,7 @@ static void rk_tsadcv3_control(void __iomem *regs, bool enable)
> writel_relaxed(val, regs + TSADCV2_AUTO_CON);
> }
>
> -static int rk_tsadcv2_get_temp(struct chip_tsadc_table table,
> +static int rk_tsadcv2_get_temp(const struct chip_tsadc_table *table,
> int chn, void __iomem *regs, int *temp)
> {
> u32 val;
> @@ -656,17 +656,17 @@ static int rk_tsadcv2_get_temp(struct chip_tsadc_table table,
> return rk_tsadcv2_code_to_temp(table, val, temp);
> }
>
> -static void rk_tsadcv2_alarm_temp(struct chip_tsadc_table table,
> +static void rk_tsadcv2_alarm_temp(const struct chip_tsadc_table *table,
> int chn, void __iomem *regs, int temp)
> {
> u32 alarm_value, int_en;
>
> /* Make sure the value is valid */
> alarm_value = rk_tsadcv2_temp_to_code(table, temp);
> - if (alarm_value == table.data_mask)
> + if (alarm_value == table->data_mask)
> return;
>
> - writel_relaxed(alarm_value & table.data_mask,
> + writel_relaxed(alarm_value & table->data_mask,
> regs + TSADCV2_COMP_INT(chn));
>
> int_en = readl_relaxed(regs + TSADCV2_INT_EN);
> @@ -674,14 +674,14 @@ static void rk_tsadcv2_alarm_temp(struct chip_tsadc_table table,
> writel_relaxed(int_en, regs + TSADCV2_INT_EN);
> }
>
> -static void rk_tsadcv2_tshut_temp(struct chip_tsadc_table table,
> +static void rk_tsadcv2_tshut_temp(const struct chip_tsadc_table *table,
> int chn, void __iomem *regs, int temp)
> {
> u32 tshut_value, val;
>
> /* Make sure the value is valid */
> tshut_value = rk_tsadcv2_temp_to_code(table, temp);
> - if (tshut_value == table.data_mask)
> + if (tshut_value == table->data_mask)
> return;
>
> writel_relaxed(tshut_value, regs + TSADCV2_COMP_SHUT(chn));
> @@ -891,7 +891,7 @@ static int rockchip_thermal_set_trips(void *_sensor, int low, int high)
> dev_dbg(&thermal->pdev->dev, "%s: sensor %d: low: %d, high %d\n",
> __func__, sensor->id, low, high);
>
> - tsadc->set_alarm_temp(tsadc->table,
> + tsadc->set_alarm_temp(&tsadc->table,
> sensor->id, thermal->regs, high);
>
> return 0;
> @@ -904,7 +904,7 @@ static int rockchip_thermal_get_temp(void *_sensor, int *out_temp)
> const struct rockchip_tsadc_chip *tsadc = sensor->thermal->chip;
> int retval;
>
> - retval = tsadc->get_temp(tsadc->table,
> + retval = tsadc->get_temp(&tsadc->table,
> sensor->id, thermal->regs, out_temp);
> dev_dbg(&thermal->pdev->dev, "sensor %d - temp: %d, retval: %d\n",
> sensor->id, *out_temp, retval);
> @@ -988,7 +988,7 @@ rockchip_thermal_register_sensor(struct platform_device *pdev,
> int error;
>
> tsadc->set_tshut_mode(id, thermal->regs, thermal->tshut_mode);
> - tsadc->set_tshut_temp(tsadc->table, id, thermal->regs,
> + tsadc->set_tshut_temp(&tsadc->table, id, thermal->regs,
> thermal->tshut_temp);
>
> sensor->thermal = thermal;
> @@ -1202,7 +1202,7 @@ static int __maybe_unused rockchip_thermal_resume(struct device *dev)
>
> thermal->chip->set_tshut_mode(id, thermal->regs,
> thermal->tshut_mode);
> - thermal->chip->set_tshut_temp(thermal->chip->table,
> + thermal->chip->set_tshut_temp(&thermal->chip->table,
> id, thermal->regs,
> thermal->tshut_temp);
> }


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