[PATCH 4/9] thermal: rockchip: handle the power sequence for tsadc controller
Eduardo Valentin
edubezval at gmail.com
Wed Apr 27 16:48:19 PDT 2016
On Mon, Apr 18, 2016 at 11:35:56AM +0800, Caesar Wang wrote:
> This adds the grf property to handle the tsadc power sequence on
> rockchip some SoCs.
>
> Verified on rk3399 can work with this patch on now.
>
> while true; do grep "" /sys/class/thermal/thermal_zone[0-1]/temp
> sleep .5; done
> /sys/class/thermal/thermal_zone0/temp:40555
> /sys/class/thermal/thermal_zone1/temp:41111
> /sys/class/thermal/thermal_zone0/temp:40555
> /sys/class/thermal/thermal_zone1/temp:41111
> /sys/class/thermal/thermal_zone0/temp:40555
> /sys/class/thermal/thermal_zone1/temp:41666
> /sys/class/thermal/thermal_zone0/temp:40555
> /sys/class/thermal/thermal_zone1/temp:41111
> /sys/class/thermal/thermal_zone0/temp:40555
> /sys/class/thermal/thermal_zone1/temp:41111
> /sys/class/thermal/thermal_zone0/temp:40555
>
> Signed-off-by: Caesar Wang <wxt at rock-chips.com>
> Cc: Zhang Rui <rui.zhang at intel.com>
> Cc: Eduardo Valentin <edubezval at gmail.com>
> Cc: Heiko Stuebner <heiko at sntech.de>
> ---
>
> drivers/thermal/rockchip_thermal.c | 87 +++++++++++++++++++++++++++++++++++---
> 1 file changed, 82 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/thermal/rockchip_thermal.c b/drivers/thermal/rockchip_thermal.c
> index e5064d7..3cb2e94 100644
> --- a/drivers/thermal/rockchip_thermal.c
> +++ b/drivers/thermal/rockchip_thermal.c
> @@ -23,8 +23,10 @@
> #include <linux/of_address.h>
> #include <linux/of_irq.h>
> #include <linux/platform_device.h>
> +#include <linux/regmap.h>
> #include <linux/reset.h>
> #include <linux/thermal.h>
> +#include <linux/mfd/syscon.h>
> #include <linux/pinctrl/consumer.h>
>
> /**
> @@ -97,7 +99,8 @@ struct rockchip_tsadc_chip {
> enum tshut_polarity tshut_polarity;
>
> /* Chip-wide methods */
> - void (*initialize)(void __iomem *reg, enum tshut_polarity p);
> + void (*initialize)(struct regmap *grf,
> + void __iomem *reg, enum tshut_polarity p);
> void (*irq_ack)(void __iomem *reg);
> void (*control)(void __iomem *reg, bool on);
>
> @@ -128,6 +131,7 @@ struct rockchip_thermal_data {
> struct clk *clk;
> struct clk *pclk;
>
> + struct regmap *grf;
> void __iomem *regs;
>
> int tshut_temp;
> @@ -142,6 +146,7 @@ struct rockchip_thermal_data {
> * TSADCV3_* are used for newer SoCs than RK3288. (e.g: RK3228, RK3399)
> *
> */
> +#define TSADCV2_USER_CON 0x00
> #define TSADCV2_AUTO_CON 0x04
> #define TSADCV2_INT_EN 0x08
> #define TSADCV2_INT_PD 0x0c
> @@ -177,6 +182,16 @@ struct rockchip_thermal_data {
> #define TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT 4
> #define TSADCV2_AUTO_PERIOD_TIME 250 /* msec */
> #define TSADCV2_AUTO_PERIOD_HT_TIME 50 /* msec */
> +#define TSADCV2_USER_INTER_PD_SOC 0x340 /* 13 clocks */
> +
> +#define GRF_SARADC_TESTBIT 0x0e644
> +#define GRF_TSADC_TESTBIT_L 0x0e648
> +#define GRF_TSADC_TESTBIT_H 0x0e64c
> +
> +#define GRF_TSADC_TSEN_PD_ON (0x30003 << 0)
> +#define GRF_TSADC_TSEN_PD_OFF (0x30000 << 0)
> +#define GRF_SARADC_TESTBIT_ON (0x10001 << 2)
> +#define GRF_TSADC_TESTBIT_H_ON (0x10001 << 2)
>
> struct tsadc_table {
> u32 code;
> @@ -449,7 +464,7 @@ static int rk_tsadcv2_code_to_temp(struct chip_tsadc_table table, u32 code,
> * If the temperature is higher than COMP_INT or COMP_SHUT for
> * "debounce" times, TSADC controller will generate interrupt or TSHUT.
> */
> -static void rk_tsadcv2_initialize(void __iomem *regs,
> +static void rk_tsadcv2_initialize(struct regmap *grf, void __iomem *regs,
> enum tshut_polarity tshut_polarity)
> {
> if (tshut_polarity == TSHUT_HIGH_ACTIVE)
> @@ -466,6 +481,61 @@ static void rk_tsadcv2_initialize(void __iomem *regs,
> regs + TSADCV2_AUTO_PERIOD_HT);
> writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT,
> regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
> +
> + if (IS_ERR(grf)) {
> + pr_warn("%s: Missing rockchip,grf property\n", __func__);
> + return;
> + }
> +}
> +
> +/**
> + * rk_tsadcv3_initialize - initialize TASDC Controller.
> + * (1) The tsadc control power sequence.
> + *
> + * (2) Set TSADC_V2_AUTO_PERIOD:
> + * Configure the interleave between every two accessing of
> + * TSADC in normal operation.
> + *
> + * (2) Set TSADCV2_AUTO_PERIOD_HT:
> + * Configure the interleave between every two accessing of
> + * TSADC after the temperature is higher than COM_SHUT or COM_INT.
> + *
> + * (3) Set TSADCV2_HIGH_INT_DEBOUNCE and TSADC_HIGHT_TSHUT_DEBOUNCE:
> + * If the temperature is higher than COMP_INT or COMP_SHUT for
> + * "debounce" times, TSADC controller will generate interrupt or TSHUT.
> + */
> +static void rk_tsadcv3_initialize(struct regmap *grf, void __iomem *regs,
> + enum tshut_polarity tshut_polarity)
> +{
> + /* The tsadc control power sequence */
> + if (IS_ERR(grf)) {
> + /* Set interleave value to workround ic time sync issue */
> + writel_relaxed(TSADCV2_USER_INTER_PD_SOC, regs +
> + TSADCV2_USER_CON);
> + } else {
> + regmap_write(grf, GRF_TSADC_TESTBIT_L, GRF_TSADC_TSEN_PD_ON);
> + mdelay(10);
> + regmap_write(grf, GRF_TSADC_TESTBIT_L, GRF_TSADC_TSEN_PD_OFF);
> + udelay(100); /* The spec note says at least 15 us */
> + regmap_write(grf, GRF_SARADC_TESTBIT, GRF_SARADC_TESTBIT_ON);
> + regmap_write(grf, GRF_TSADC_TESTBIT_H, GRF_TSADC_TESTBIT_H_ON);
> + udelay(200); /* The spec note says at least 90 us */
Does it make sense to use usleep_range() instead?
> + }
> +
> + if (tshut_polarity == TSHUT_HIGH_ACTIVE)
> + writel_relaxed(0U | TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
> + regs + TSADCV2_AUTO_CON);
> + else
> + writel_relaxed(0U & ~TSADCV2_AUTO_TSHUT_POLARITY_HIGH,
> + regs + TSADCV2_AUTO_CON);
> +
> + writel_relaxed(TSADCV2_AUTO_PERIOD_TIME, regs + TSADCV2_AUTO_PERIOD);
> + writel_relaxed(TSADCV2_HIGHT_INT_DEBOUNCE_COUNT,
> + regs + TSADCV2_HIGHT_INT_DEBOUNCE);
> + writel_relaxed(TSADCV2_AUTO_PERIOD_HT_TIME,
> + regs + TSADCV2_AUTO_PERIOD_HT);
> + writel_relaxed(TSADCV2_HIGHT_TSHUT_DEBOUNCE_COUNT,
> + regs + TSADCV2_HIGHT_TSHUT_DEBOUNCE);
> }
>
> static void rk_tsadcv2_irq_ack(void __iomem *regs)
> @@ -636,7 +706,7 @@ static const struct rockchip_tsadc_chip rk3399_tsadc_data = {
> .tshut_polarity = TSHUT_LOW_ACTIVE, /* default TSHUT LOW ACTIVE */
> .tshut_temp = 95000,
>
> - .initialize = rk_tsadcv2_initialize,
> + .initialize = rk_tsadcv3_initialize,
> .irq_ack = rk_tsadcv3_irq_ack,
> .control = rk_tsadcv3_control,
> .get_temp = rk_tsadcv2_get_temp,
> @@ -768,6 +838,11 @@ static int rockchip_configure_from_dt(struct device *dev,
> return -EINVAL;
> }
>
> + /* The tsadc wont to handle the error in here since some SoCs didn't
> + * need this property.
> + */
> + thermal->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
> +
> return 0;
> }
>
> @@ -888,7 +963,8 @@ static int rockchip_thermal_probe(struct platform_device *pdev)
> goto err_disable_pclk;
> }
>
> - thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);
> + thermal->chip->initialize(thermal->grf, thermal->regs,
> + thermal->tshut_polarity);
>
> for (i = 0; i < thermal->chip->chn_num; i++) {
> error = rockchip_thermal_register_sensor(pdev, thermal,
> @@ -986,7 +1062,8 @@ static int __maybe_unused rockchip_thermal_resume(struct device *dev)
>
> rockchip_thermal_reset_controller(thermal->reset);
>
> - thermal->chip->initialize(thermal->regs, thermal->tshut_polarity);
> + thermal->chip->initialize(thermal->grf, thermal->regs,
> + thermal->tshut_polarity);
>
> for (i = 0; i < thermal->chip->chn_num; i++) {
> int id = thermal->sensors[i].id;
> --
> 1.9.1
>
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