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Message-ID: <DB3PR0402MB3916BF35E6EFEC5B29DB0FDDF5840@DB3PR0402MB3916.eurprd04.prod.outlook.com>
Date: Tue, 24 Sep 2019 06:15:24 +0000
From: Anson Huang <anson.huang@....com>
To: Andy Tang <andy.tang@....com>,
"edubezval@...il.com" <edubezval@...il.com>,
"rui.zhang@...el.com" <rui.zhang@...el.com>
CC: "daniel.lezcano@...aro.org" <daniel.lezcano@...aro.org>,
Leo Li <leoyang.li@....com>,
"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Andy Tang <andy.tang@....com>
Subject: RE: [PATCH v2] thermal: qoriq: add thermal monitor unit version 2
support
> -----Original Message-----
> From: Yuantian Tang <andy.tang@....com>
> Sent: Tuesday, September 24, 2019 11:17 AM
> To: edubezval@...il.com; rui.zhang@...el.com; Anson Huang
> <anson.huang@....com>
> Cc: daniel.lezcano@...aro.org; Leo Li <leoyang.li@....com>; linux-
> pm@...r.kernel.org; linux-kernel@...r.kernel.org; Andy Tang
> <andy.tang@....com>
> Subject: [PATCH v2] thermal: qoriq: add thermal monitor unit version 2
> support
>
> Thermal Monitor Unit v2 is introduced on new Layscape SoC.
> Compared to v1, TMUv2 has a little different register layout and digital
> output is fairly linear.
>
> Signed-off-by: Yuantian Tang <andy.tang@....com>
Reviewed-by: Anson Huang <Anson.Huang@....com>
> ---
> v2:
> - refine the code: remove redundant variable, rename variable etc.
>
> drivers/thermal/qoriq_thermal.c | 121 +++++++++++++++++++++++++-------
> 1 file changed, 97 insertions(+), 24 deletions(-)
>
> diff --git a/drivers/thermal/qoriq_thermal.c
> b/drivers/thermal/qoriq_thermal.c index 7b364933bfb1..43617e53554b
> 100644
> --- a/drivers/thermal/qoriq_thermal.c
> +++ b/drivers/thermal/qoriq_thermal.c
> @@ -12,7 +12,16 @@
>
> #include "thermal_core.h"
>
> -#define SITES_MAX 16
> +#define SITES_MAX 16
> +#define TMR_DISABLE 0x0
> +#define TMR_ME 0x80000000
> +#define TMR_ALPF 0x0c000000
> +#define TMR_ALPF_V2 0x03000000
> +#define TMTMIR_DEFAULT 0x0000000f
> +#define TIER_DISABLE 0x0
> +#define TEUMR0_V2 0x51009c00
> +#define TMU_VER1 0x1
> +#define TMU_VER2 0x2
>
> /*
> * QorIQ TMU Registers
> @@ -23,17 +32,55 @@ struct qoriq_tmu_site_regs {
> u8 res0[0x8];
> };
>
> -struct qoriq_tmu_regs {
> +struct qoriq_tmu_regs_v2 {
> + u32 tmr; /* Mode Register */
> + u32 tsr; /* Status Register */
> + u32 tmsr; /* monitor site register */
> + u32 tmtmir; /* Temperature measurement interval
> Register */
> + u8 res0[0x10];
> + u32 tier; /* Interrupt Enable Register */
> + u32 tidr; /* Interrupt Detect Register */
> + u8 res1[0x8];
> + u32 tiiscr; /* interrupt immediate site capture register
> */
> + u32 tiascr; /* interrupt average site capture register */
> + u32 ticscr; /* Interrupt Critical Site Capture Register */
> + u32 res2;
> + u32 tmhtcr; /* monitor high temperature capture register
> */
> + u32 tmltcr; /* monitor low temperature capture register
> */
> + u32 tmrtrcr; /* monitor rising temperature rate capture register
> */
> + u32 tmftrcr; /* monitor falling temperature rate capture register
> */
> + u32 tmhtitr; /* High Temperature Immediate Threshold */
> + u32 tmhtatr; /* High Temperature Average Threshold */
> + u32 tmhtactr; /* High Temperature Average Crit Threshold */
> + u32 res3;
> + u32 tmltitr; /* monitor low temperature immediate threshold */
> + u32 tmltatr; /* monitor low temperature average threshold
> register */
> + u32 tmltactr; /* monitor low temperature average critical
> threshold */
> + u32 res4;
> + u32 tmrtrctr; /* monitor rising temperature rate critical threshold
> */
> + u32 tmftrctr; /* monitor falling temperature rate critical
> threshold*/
> + u8 res5[0x8];
> + u32 ttcfgr; /* Temperature Configuration Register */
> + u32 tscfgr; /* Sensor Configuration Register */
> + u8 res6[0x78];
> + struct qoriq_tmu_site_regs site[SITES_MAX];
> + u8 res7[0x9f8];
> + u32 ipbrr0; /* IP Block Revision Register 0 */
> + u32 ipbrr1; /* IP Block Revision Register 1 */
> + u8 res8[0x300];
> + u32 teumr0;
> + u32 teumr1;
> + u32 teumr2;
> + u32 res9;
> + u32 ttrcr[4]; /* Temperature Range Control Register */
> +};
> +
> +struct qoriq_tmu_regs_v1 {
> u32 tmr; /* Mode Register */
> -#define TMR_DISABLE 0x0
> -#define TMR_ME 0x80000000
> -#define TMR_ALPF 0x0c000000
> u32 tsr; /* Status Register */
> u32 tmtmir; /* Temperature measurement interval
> Register */
> -#define TMTMIR_DEFAULT 0x0000000f
> u8 res0[0x14];
> u32 tier; /* Interrupt Enable Register */
> -#define TIER_DISABLE 0x0
> u32 tidr; /* Interrupt Detect Register */
> u32 tiscr; /* Interrupt Site Capture Register */
> u32 ticscr; /* Interrupt Critical Site Capture Register */
> @@ -53,10 +100,7 @@ struct qoriq_tmu_regs {
> u32 ipbrr0; /* IP Block Revision Register 0 */
> u32 ipbrr1; /* IP Block Revision Register 1 */
> u8 res6[0x310];
> - u32 ttr0cr; /* Temperature Range 0 Control Register */
> - u32 ttr1cr; /* Temperature Range 1 Control Register */
> - u32 ttr2cr; /* Temperature Range 2 Control Register */
> - u32 ttr3cr; /* Temperature Range 3 Control Register */
> + u32 ttrcr[4]; /* Temperature Range Control Register */
> };
>
> struct qoriq_tmu_data;
> @@ -71,7 +115,9 @@ struct qoriq_sensor { };
>
> struct qoriq_tmu_data {
> - struct qoriq_tmu_regs __iomem *regs;
> + int ver;
> + struct qoriq_tmu_regs_v1 __iomem *regs;
> + struct qoriq_tmu_regs_v2 __iomem *regs_v2;
> bool little_endian;
> struct qoriq_sensor *sensor[SITES_MAX];
> };
> @@ -130,12 +176,23 @@ static int qoriq_tmu_register_tmu_zone(struct
> platform_device *pdev)
> return PTR_ERR(qdata->sensor[id]->tzd);
> }
>
> - sites |= 0x1 << (15 - id);
> + if (qdata->ver == TMU_VER1)
> + sites |= 0x1 << (15 - id);
> + else
> + sites |= 0x1 << id;
> }
>
> /* Enable monitoring */
> - if (sites != 0)
> - tmu_write(qdata, sites | TMR_ME | TMR_ALPF, &qdata-
> >regs->tmr);
> + if (sites != 0) {
> + if (qdata->ver == TMU_VER1) {
> + tmu_write(qdata, sites | TMR_ME | TMR_ALPF,
> + &qdata->regs->tmr);
> + } else {
> + tmu_write(qdata, sites, &qdata->regs_v2->tmsr);
> + tmu_write(qdata, TMR_ME | TMR_ALPF_V2,
> + &qdata->regs_v2->tmr);
> + }
> + }
>
> return 0;
> }
> @@ -148,16 +205,20 @@ static int qoriq_tmu_calibration(struct
> platform_device *pdev)
> struct device_node *np = pdev->dev.of_node;
> struct qoriq_tmu_data *data = platform_get_drvdata(pdev);
>
> - if (of_property_read_u32_array(np, "fsl,tmu-range", range, 4)) {
> - dev_err(&pdev->dev, "missing calibration range.\n");
> - return -ENODEV;
> + len = of_property_count_u32_elems(np, "fsl,tmu-range");
> + if (len < 0 || len > 4) {
> + dev_err(&pdev->dev, "invalid range data.\n");
> + return len;
> + }
> +
> + val = of_property_read_u32_array(np, "fsl,tmu-range", range, len);
> + if (val != 0) {
> + dev_err(&pdev->dev, "failed to read range data.\n");
> + return val;
> }
>
> - /* Init temperature range registers */
> - tmu_write(data, range[0], &data->regs->ttr0cr);
> - tmu_write(data, range[1], &data->regs->ttr1cr);
> - tmu_write(data, range[2], &data->regs->ttr2cr);
> - tmu_write(data, range[3], &data->regs->ttr3cr);
> + for (i = 0; i < len; i++)
> + tmu_write(data, range[i], &data->regs->ttrcr[i]);
>
> calibration = of_get_property(np, "fsl,tmu-calibration", &len);
> if (calibration == NULL || len % 8) {
> @@ -181,7 +242,12 @@ static void qoriq_tmu_init_device(struct
> qoriq_tmu_data *data)
> tmu_write(data, TIER_DISABLE, &data->regs->tier);
>
> /* Set update_interval */
> - tmu_write(data, TMTMIR_DEFAULT, &data->regs->tmtmir);
> + if (data->ver == TMU_VER1) {
> + tmu_write(data, TMTMIR_DEFAULT, &data->regs->tmtmir);
> + } else {
> + tmu_write(data, TMTMIR_DEFAULT, &data->regs_v2-
> >tmtmir);
> + tmu_write(data, TEUMR0_V2, &data->regs_v2->teumr0);
> + }
>
> /* Disable monitoring */
> tmu_write(data, TMR_DISABLE, &data->regs->tmr); @@ -190,6
> +256,7 @@ static void qoriq_tmu_init_device(struct qoriq_tmu_data *data)
> static int qoriq_tmu_probe(struct platform_device *pdev) {
> int ret;
> + u32 ver;
> struct qoriq_tmu_data *data;
> struct device_node *np = pdev->dev.of_node;
>
> @@ -209,6 +276,12 @@ static int qoriq_tmu_probe(struct platform_device
> *pdev)
> goto err_iomap;
> }
>
> + /* version register offset at: 0xbf8 on both v1 and v2 */
> + ver = tmu_read(data, &data->regs->ipbrr0);
> + data->ver = (ver >> 8) & 0xff;
> + if (data->ver == TMU_VER2)
> + data->regs_v2 = (void __iomem *)data->regs;
> +
> qoriq_tmu_init_device(data); /* TMU initialization */
>
> ret = qoriq_tmu_calibration(pdev); /* TMU calibration */
> --
> 2.17.1
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