Add support for the on-die Thermal Monitoring Unit (TMU) of the new QorIQ/Layerscape SoCs (LX2160A, LS1028A, LS1088A, ...):
examples on a lx2160: => temperature list | Device | Driver | Parent | tmu@1f80000 | imx_tmu | root_driver | cluster67-thermal | imx_tmu | tmu@1f80000 | ddr1-cluster5-thermal | imx_tmu | tmu@1f80000 | wriop-thermal | imx_tmu | tmu@1f80000 | dce-qbman-hsio2-thermal | imx_tmu | tmu@1f80000 | ccn-dpaa-tbu-thermal | imx_tmu | tmu@1f80000 | cluster4-hsio3-thermal | imx_tmu | tmu@1f80000 | cluster23-thermal | imx_tmu | tmu@1f80000 => temperature get tmu@1f80000 tmu@1f80000: 82000 mC => temperature get wriop-thermal wriop-thermal: 81000 mC The parent tmu@... node owns the MMIO and calibration; one UCLASS_THERMAL device is bound per/thermal-zones site so each shows up by its zone name: => dm tree ... thermal 2 [ + ] imx_tmu |-- tmu@1f80000 thermal 3 [ + ] imx_tmu | |-- cluster67-thermal thermal 4 [ + ] imx_tmu | |-- ddr1-cluster5-thermal thermal 5 [ + ] imx_tmu | |-- wriop-thermal thermal 6 [ + ] imx_tmu | |-- dce-qbman-hsio2-thermal thermal 7 [ + ] imx_tmu | |-- ccn-dpaa-tbu-thermal thermal 8 [ + ] imx_tmu | |-- cluster4-hsio3-thermal thermal 9 [ + ] imx_tmu | `-- cluster23-thermal ... The dtsi additions mirror the existing fsl-ls1028a.dtsi: the LX2160A SoC dtsi gains the tmu@1f80000 node plus a thermal-zones hierarchy with 7 sites: cluster67-thermal site 0 A72 clusters 6 + 7 ddr1-cluster5-thermal site 1 DDR1 + A72 cluster 5 wriop-thermal site 2 WRIOP dce-qbman-hsio2-thermal site 3 DCE + QBMAN + HSIO2 ccn-dpaa-tbu-thermal site 4 CCN508 + DPAA + TBU cluster4-hsio3-thermal site 5 A72 cluster 4 + HSIO3 cluster23-thermal site 6 A72 clusters 2 + 3 Signed-off-by: Vincent Jardin <[email protected]> Suggested-by: Tom Rini <[email protected]> Inspired-by: Peng Fan <[email protected]> --- Changes in v2: - Per Tom Rini's challenge: fold the QorIQ TMU into the existing drivers/thermal/imx_tmu.c, it is surgery. - Provide get_cpu_temp_grade() on the Layerscape side Patch-cc: Peng Fan <[email protected]> Patch-cc: Tom Rini <[email protected]> arch/arm/cpu/armv8/fsl-layerscape/cpu.c | 21 +++ arch/arm/dts/fsl-lx2160a.dtsi | 58 ++++++++ .../asm/arch-fsl-layerscape/sys_proto.h | 30 +++++ drivers/thermal/Kconfig | 9 +- drivers/thermal/imx_tmu.c | 125 +++++++++++++++++- 5 files changed, 238 insertions(+), 5 deletions(-) create mode 100644 arch/arm/include/asm/arch-fsl-layerscape/sys_proto.h diff --git a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c index cfbaa475701..7bd54cf1253 100644 --- a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c +++ b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c @@ -986,6 +986,27 @@ uint get_svr(void) } #endif +/* + * Layerscape mirror of the i.MX get_cpu_temp_grade(). i.MX reads the + * OCOTP "CPU temp grade" fuses; Layerscape has no such fuse, so the + * limits come from the data sheet instead. LX2160A Reference Manual + * Rev. 1 (10/2021) section 1.12.1 specifies the maximum operating + * junction temperature at 105 degC for commercial / embedded parts; + * the lower bound is the standard -40 degC commercial low. + * + * The TMU itself is documented as accurate within +/- 3 degC (RM + * section 28.1), which the thermal driver clears by setting its + * alert threshold 10 degC below critical. + */ +u32 get_cpu_temp_grade(int *minc, int *maxc) +{ + if (minc) + *minc = -40; + if (maxc) + *maxc = 105; + return 0; /* commercial */ +} + #ifdef CONFIG_DISPLAY_CPUINFO int print_cpuinfo(void) { diff --git a/arch/arm/dts/fsl-lx2160a.dtsi b/arch/arm/dts/fsl-lx2160a.dtsi index 680c69c7b73..e27839124f0 100644 --- a/arch/arm/dts/fsl-lx2160a.dtsi +++ b/arch/arm/dts/fsl-lx2160a.dtsi @@ -594,6 +594,64 @@ }; }; + /* LX2160ARM Chapter 28 ("Thermal Monitoring Unit") */ + tmu: tmu@1f80000 { + compatible = "fsl,qoriq-tmu"; + reg = <0x0 0x1f80000 0x0 0x10000>; + interrupts = <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>; + fsl,tmu-range = <0x800000e6 0x8001017d>; + fsl,tmu-calibration = <0x00000000 0x00000035 + 0x00000001 0x00000154>; + little-endian; + #thermal-sensor-cells = <1>; + label = "lx2160a-tmu"; /* explicit naming */ + }; + + /* explicit thermal-zones names per LX2160ARM Table 323 */ + thermal-zones { + cluster67-thermal { + polling-delay-passive = <1000>; + polling-delay = <5000>; + thermal-sensors = <&tmu 0>; + }; + + ddr1-cluster5-thermal { + polling-delay-passive = <1000>; + polling-delay = <5000>; + thermal-sensors = <&tmu 1>; + }; + + wriop-thermal { + polling-delay-passive = <1000>; + polling-delay = <5000>; + thermal-sensors = <&tmu 2>; + }; + + dce-qbman-hsio2-thermal { + polling-delay-passive = <1000>; + polling-delay = <5000>; + thermal-sensors = <&tmu 3>; + }; + + ccn-dpaa-tbu-thermal { + polling-delay-passive = <1000>; + polling-delay = <5000>; + thermal-sensors = <&tmu 4>; + }; + + cluster4-hsio3-thermal { + polling-delay-passive = <1000>; + polling-delay = <5000>; + thermal-sensors = <&tmu 5>; + }; + + cluster23-thermal { + polling-delay-passive = <1000>; + polling-delay = <5000>; + thermal-sensors = <&tmu 6>; + }; + }; + /* WRIOP0: 0x8b8_0000, E-MDIO1: 0x1_6000 */ emdio1: mdio@8b96000 { compatible = "fsl,ls-mdio"; diff --git a/arch/arm/include/asm/arch-fsl-layerscape/sys_proto.h b/arch/arm/include/asm/arch-fsl-layerscape/sys_proto.h new file mode 100644 index 00000000000..3b78e73c726 --- /dev/null +++ b/arch/arm/include/asm/arch-fsl-layerscape/sys_proto.h @@ -0,0 +1,30 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright 2026 Free Mobile - Vincent Jardin + * + * Layerscape mirror of the i.MX <asm/mach-imx/sys_proto.h>: declares + * the SoC-personality helpers consumed by generic drivers that work on + * both i.MX and QorIQ/Layerscape parts (e.g. drivers/thermal/imx_tmu.c + * for the QorIQ TMU variant). + */ + +#ifndef _ASM_ARCH_FSL_LAYERSCAPE_SYS_PROTO_H +#define _ASM_ARCH_FSL_LAYERSCAPE_SYS_PROTO_H + +#include <linux/types.h> + +/* + * Per LX2160A Reference Manual, Rev. 1 (10/2021): + * - section 1.12.1: "NXP specs max power at 105 degC junction" for + * commercial / embedded operating conditions. + * - section 28.1: TMU "Accuracy within +/- 3 degC". + * + * Layerscape SoCs do not expose an OCOTP-style "CPU temp grade" fuse, + * so the implementation returns the documented junction-temperature + * limit from the data sheet (-40 .. 105 degC commercial range). The + * thermal driver subtracts 10 degC for its alert threshold, which + * comfortably clears the +/- 3 degC TMU accuracy in both directions. + */ +u32 get_cpu_temp_grade(int *minc, int *maxc); + +#endif /* _ASM_ARCH_FSL_LAYERSCAPE_SYS_PROTO_H */ diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 91c39aa4dee..47eee475e8d 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -27,11 +27,12 @@ config IMX_SCU_THERMAL trip is crossed config IMX_TMU - bool "Thermal Management Unit driver for NXP i.MX8M and iMX93" - depends on ARCH_IMX8M || IMX93 + bool "Thermal Management Unit driver for NXP i.MX8M / i.MX93 and QorIQ" + depends on ARCH_IMX8M || IMX93 || FSL_LAYERSCAPE help - Support for Temperature sensors on NXP i.MX8M and iMX93. - It supports one critical trip point and one passive trip point. + Support for the NXP Thermal Management Unit (TMU) sensors on + i.MX8M, i.MX93 and on QorIQ/Layerscape SoCs (LX2160A, + LS1028A, LS1088A, ...). The boot is hold to the cool device to throttle CPUs when the passive trip is crossed diff --git a/drivers/thermal/imx_tmu.c b/drivers/thermal/imx_tmu.c index 1bde4d07f52..da0825ecd34 100644 --- a/drivers/thermal/imx_tmu.c +++ b/drivers/thermal/imx_tmu.c @@ -6,14 +6,17 @@ #include <config.h> #include <asm/io.h> -#include <asm/arch/clock.h> #include <asm/arch/sys_proto.h> +#if IS_ENABLED(CONFIG_ARCH_IMX8M) || IS_ENABLED(CONFIG_IMX93) +#include <asm/arch/clock.h> +#endif #include <dm.h> #include <dm/device_compat.h> #include <dm/device-internal.h> #include <dm/device.h> #include <errno.h> #include <fuse.h> +#include <linux/bitops.h> #include <linux/delay.h> #include <malloc.h> #include <thermal.h> @@ -22,10 +25,12 @@ #define FLAGS_VER2 0x1 #define FLAGS_VER3 0x2 #define FLAGS_VER4 0x4 +#define FLAGS_QORIQ 0x8 #define TMR_DISABLE 0x0 #define TMR_ME 0x80000000 #define TMR_ALPF 0x0c000000 +#define QORIQ_TMR_ALPF (0x3 << 24) /* QorIQ ALPF lives at bits[25:24] */ #define TMTMIR_DEFAULT 0x00000002 #define TIER_DISABLE 0x0 @@ -33,7 +38,19 @@ #define TER_ADC_PD 0x40000000 #define TER_ALPF 0x3 +/* default CPU delay time to cool down if over temperature */ #define IMX_TMU_POLLING_DELAY_MS 5000 + +/* TRITSR - QorIQ Immediate Temperature Site Register. + * + * Per LX2160A Reference Manual, Rev. 1 (10/2021) section 28.3.1.24 + * the calibrated reading lives in TEMP[8:0] and is reported in + * degrees Kelvin (integer). The QorIQ regs_v1 variant has no + * fractional 0.5 degC bit, unlike the i.MX regs_v2 / VER4 layouts. + */ +#define TRITSR_V BIT(31) /* reading valid */ +#define TRITSR_TEMP_MASK GENMASK(8, 0) /* degrees Kelvin */ +#define TRITSR_KELVIN_OFFSET 273 /* TEMP[8:0] - 273 = degC */ /* * i.MX TMU Registers */ @@ -148,11 +165,37 @@ struct imx_tmu_regs_v3 { u32 trim; }; +/* + * fsl,qoriq-tmu (LX2160A, LS1028A, LS1088A, ...). Same TMU IP family as + * the i.MX "regs_v1" layout but: site-enable is a discrete TMSR at 0x08 + * (TMTMIR moves to 0x0C), and the temperature range registers are + * variable-length at 0xF10 (a SoC may use fewer than 16). Calibration is + * taken from the DT (fsl,tmu-range / fsl,tmu-calibration) exactly like + * the i.MX regs_v1 path, so qoriq reuses imx_tmu_calibration()'s scheme. + */ +struct qoriq_tmu_regs { + u32 tmr; /* 0x000 mode */ + u32 tsr; /* 0x004 status */ + u32 tmsr; /* 0x008 monitor-site enable (bit N = site N) */ + u32 tmtmir; /* 0x00C measurement interval */ + u8 res0[0x10]; + u32 tier; /* 0x020 interrupt enable */ + u32 tidr; /* 0x024 interrupt detect */ + u8 res1[0x58]; + u32 ttcfgr; /* 0x080 temperature config (cal walk) */ + u32 tscfgr; /* 0x084 sensor config (cal walk) */ + u8 res2[0x78]; + struct imx_tmu_site_regs site[SITES_MAX]; /* 0x100 */ + u8 res3[0xd10]; + u32 ttrcr[16]; /* 0xF10 temperature range control */ +}; + union tmu_regs { struct imx_tmu_regs regs_v1; struct imx_tmu_regs_v2 regs_v2; struct imx_tmu_regs_v3 regs_v3; struct imx_tmu_regs_v4 regs_v4; + struct qoriq_tmu_regs regs_qoriq; }; struct imx_tmu_plat { @@ -189,6 +232,9 @@ static int read_temperature(struct udevice *dev, int *temp) } else if (drv_data & FLAGS_VER4) { val = readl(&pdata->regs->regs_v4.tritsr0); valid = val & 0x80000000; + } else if (drv_data & FLAGS_QORIQ) { + val = readl(&pdata->regs->regs_qoriq.site[pdata->id].tritsr); + valid = val & TRITSR_V; } else { val = readl(&pdata->regs->regs_v1.site[pdata->id].tritsr); valid = val & 0x80000000; @@ -213,6 +259,19 @@ static int read_temperature(struct udevice *dev, int *temp) /* Convert Kelvin to Celsius */ *temp -= 273000; + } else if (drv_data & FLAGS_QORIQ) { + /* + * LX2160A Reference Manual, Rev. 1 (10/2021) + * section 28.3.1.24: TEMP[8:0] is the calibrated + * reading in degrees Kelvin (integer, no 0.5 degC + * bit on the regs_v1 variant). The calibration + * point examples in the same RM section 28.1.3 + * use the same Kelvin/Celsius offset: + * TTR0CR=0x800000E6 -> 230K (-43 degC) + * TTR1CR=0x8001017D -> 381K (108 degC) + */ + *temp = ((val & TRITSR_TEMP_MASK) - + TRITSR_KELVIN_OFFSET) * 1000; } else { *temp = (val & 0xff) * 1000; } @@ -265,6 +324,35 @@ static int imx_tmu_calibration(struct udevice *dev) if (drv_data & (FLAGS_VER2 | FLAGS_VER3)) return 0; + if (drv_data & FLAGS_QORIQ) { + const fdt32_t *ranges; + int n; + + ranges = dev_read_prop(dev, "fsl,tmu-range", &len); + if (!ranges || len % 4 || + len / 4 > (int)ARRAY_SIZE(pdata->regs->regs_qoriq.ttrcr)) { + dev_err(dev, "TMU: missing/invalid fsl,tmu-range\n"); + return -ENODEV; + } + n = len / 4; + for (i = 0; i < n; i++) + writel(fdt32_to_cpu(ranges[i]), + &pdata->regs->regs_qoriq.ttrcr[i]); + + calibration = dev_read_prop(dev, "fsl,tmu-calibration", &len); + if (!calibration || len % 8) { + dev_err(dev, "TMU: invalid calibration data.\n"); + return -ENODEV; + } + for (i = 0; i < len; i += 8, calibration += 2) { + writel(fdt32_to_cpu(*calibration), + &pdata->regs->regs_qoriq.ttcfgr); + writel(fdt32_to_cpu(*(calibration + 1)), + &pdata->regs->regs_qoriq.tscfgr); + } + return 0; + } + if (drv_data & FLAGS_VER4) { calibration = dev_read_prop(dev, "fsl,tmu-calibration", &len); if (!calibration || len % 8 || len > 128) { @@ -402,6 +490,18 @@ static inline void imx_tmu_mx8mq_init(struct udevice *dev) { } static void imx_tmu_arch_init(struct udevice *dev) { + /* + * QorIQ takes its calibration from the DT (fsl,tmu-calibration), + * not from OCOTP fuses, so it has no per-SoC arch init. The #if + * below is still required: the i.MX SoC-ID helpers and fuse API + * (<asm/arch/sys_proto.h>) do not exist in a Layerscape build, so + * the references must be removed at compile time, not merely + * skipped at runtime. + */ + if (dev_get_driver_data(dev) & FLAGS_QORIQ) + return; + +#if IS_ENABLED(CONFIG_ARCH_IMX8M) || IS_ENABLED(CONFIG_IMX93) if (is_imx8mm() || is_imx8mn()) imx_tmu_mx8mm_mx8mn_init(dev); else if (is_imx8mp()) @@ -412,6 +512,7 @@ static void imx_tmu_arch_init(struct udevice *dev) imx_tmu_mx8mq_init(dev); else dev_err(dev, "Unsupported SoC, TMU calibration not loaded!\n"); +#endif } static void imx_tmu_init(struct udevice *dev) @@ -443,6 +544,15 @@ static void imx_tmu_init(struct udevice *dev) /* Set update_interval */ writel(TMTMIR_DEFAULT, &pdata->regs->regs_v4.tmtmir); + } else if (drv_data & FLAGS_QORIQ) { + /* Disable monitoring */ + writel(TMR_DISABLE, &pdata->regs->regs_qoriq.tmr); + + /* Disable interrupt, using polling instead */ + writel(TIER_DISABLE, &pdata->regs->regs_qoriq.tier); + + /* Set update_interval */ + writel(TMTMIR_DEFAULT, &pdata->regs->regs_qoriq.tmtmir); } else { /* Disable monitoring */ writel(TMR_DISABLE, &pdata->regs->regs_v1.tmr); @@ -511,6 +621,18 @@ static int imx_tmu_enable_msite(struct udevice *dev) /* Enable ME */ reg |= TMR_ME; writel(reg, &pdata->regs->regs_v4.tmr); + } else if (drv_data & FLAGS_QORIQ) { + /* Clear ME, enable every site at once via the discrete TMSR */ + reg = readl(&pdata->regs->regs_qoriq.tmr); + reg &= ~TMR_ME; + writel(reg, &pdata->regs->regs_qoriq.tmr); + + writel(GENMASK(SITES_MAX - 1, 0), + &pdata->regs->regs_qoriq.tmsr); + + reg |= QORIQ_TMR_ALPF; + reg |= TMR_ME; + writel(reg, &pdata->regs->regs_qoriq.tmr); } else { /* Clear the ME before setting MSITE and ALPF*/ reg = readl(&pdata->regs->regs_v1.tmr); @@ -650,6 +772,7 @@ static const struct udevice_id imx_tmu_ids[] = { { .compatible = "fsl,imx8mm-tmu", .data = FLAGS_VER2, }, { .compatible = "fsl,imx8mp-tmu", .data = FLAGS_VER3, }, { .compatible = "fsl,imx93-tmu", .data = FLAGS_VER4, }, + { .compatible = "fsl,qoriq-tmu", .data = FLAGS_QORIQ, }, { } }; -- 2.43.0 base-commit: bfe90a308a94caa9d855440683521ff04122ae2a branch: for-upstream/thermal-qoriq-v2
