thermal: Add thermal driver for i.MX8M
The driver is ported form Linux Kernel and support driver model. Users need to provide the tmu node and sensors nodes in DTB. Signed-off-by: Ye Li <ye.li@nxp.com> Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan
Stefano Babic
parent
6039d669f4
commit
2cd7f47983
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@ -26,6 +26,15 @@ config IMX_SCU_THERMAL
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boot is hold to the cool device to throttle CPUs when the passive
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trip is crossed
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config IMX_TMU
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bool "Thermal Management Unit driver for NXP i.MX8M"
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depends on ARCH_IMX8M
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help
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Support for Temperature sensors on NXP i.MX8M.
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It supports one critical trip point and one passive trip point.
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The boot is hold to the cool device to throttle CPUs when the
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passive trip is crossed
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config TI_DRA7_THERMAL
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bool "Temperature sensor driver for TI dra7xx SOCs"
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help
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@ -7,3 +7,4 @@ obj-$(CONFIG_DM_THERMAL) += thermal-uclass.o
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obj-$(CONFIG_IMX_THERMAL) += imx_thermal.o
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obj-$(CONFIG_IMX_SCU_THERMAL) += imx_scu_thermal.o
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obj-$(CONFIG_TI_DRA7_THERMAL) += ti-bandgap.o
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obj-$(CONFIG_IMX_TMU) += imx_tmu.o
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@ -0,0 +1,325 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright 2017~2020 NXP
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*
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*/
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#include <config.h>
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#include <common.h>
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#include <asm/io.h>
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#include <asm/arch/clock.h>
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#include <asm/arch/sys_proto.h>
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#include <dm.h>
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#include <dm/device-internal.h>
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#include <dm/device.h>
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#include <errno.h>
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#include <fuse.h>
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#include <malloc.h>
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#include <thermal.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define SITES_MAX 16
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#define TMR_DISABLE 0x0
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#define TMR_ME 0x80000000
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#define TMR_ALPF 0x0c000000
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#define TMTMIR_DEFAULT 0x00000002
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#define TIER_DISABLE 0x0
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/*
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* i.MX TMU Registers
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*/
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struct imx_tmu_site_regs {
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u32 tritsr; /* Immediate Temperature Site Register */
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u32 tratsr; /* Average Temperature Site Register */
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u8 res0[0x8];
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};
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struct imx_tmu_regs {
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u32 tmr; /* Mode Register */
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u32 tsr; /* Status Register */
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u32 tmtmir; /* Temperature measurement interval Register */
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u8 res0[0x14];
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u32 tier; /* Interrupt Enable Register */
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u32 tidr; /* Interrupt Detect Register */
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u32 tiscr; /* Interrupt Site Capture Register */
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u32 ticscr; /* Interrupt Critical Site Capture Register */
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u8 res1[0x10];
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u32 tmhtcrh; /* High Temperature Capture Register */
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u32 tmhtcrl; /* Low Temperature Capture Register */
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u8 res2[0x8];
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u32 tmhtitr; /* High Temperature Immediate Threshold */
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u32 tmhtatr; /* High Temperature Average Threshold */
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u32 tmhtactr; /* High Temperature Average Crit Threshold */
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u8 res3[0x24];
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u32 ttcfgr; /* Temperature Configuration Register */
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u32 tscfgr; /* Sensor Configuration Register */
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u8 res4[0x78];
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struct imx_tmu_site_regs site[SITES_MAX];
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u8 res5[0x9f8];
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u32 ipbrr0; /* IP Block Revision Register 0 */
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u32 ipbrr1; /* IP Block Revision Register 1 */
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u8 res6[0x310];
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u32 ttr0cr; /* Temperature Range 0 Control Register */
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u32 ttr1cr; /* Temperature Range 1 Control Register */
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u32 ttr2cr; /* Temperature Range 2 Control Register */
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u32 ttr3cr; /* Temperature Range 3 Control Register */
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};
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struct imx_tmu_plat {
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int critical;
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int alert;
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int polling_delay;
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int id;
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bool zone_node;
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struct imx_tmu_regs *regs;
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};
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static int read_temperature(struct udevice *dev, int *temp)
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{
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struct imx_tmu_plat *pdata = dev_get_platdata(dev);
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u32 val;
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do {
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val = readl(&pdata->regs->site[pdata->id].tritsr);
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} while (!(val & 0x80000000));
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*temp = (val & 0xff) * 1000;
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return 0;
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}
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int imx_tmu_get_temp(struct udevice *dev, int *temp)
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{
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struct imx_tmu_plat *pdata = dev_get_platdata(dev);
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int cpu_tmp = 0;
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int ret;
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ret = read_temperature(dev, &cpu_tmp);
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if (ret)
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return ret;
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while (cpu_tmp >= pdata->alert) {
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printf("CPU Temperature (%dC) has beyond alert (%dC), close to critical (%dC)", cpu_tmp, pdata->alert, pdata->critical);
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puts(" waiting...\n");
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mdelay(pdata->polling_delay);
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ret = read_temperature(dev, &cpu_tmp);
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if (ret)
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return ret;
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}
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*temp = cpu_tmp / 1000;
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return 0;
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}
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static const struct dm_thermal_ops imx_tmu_ops = {
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.get_temp = imx_tmu_get_temp,
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};
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static int imx_tmu_calibration(struct udevice *dev)
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{
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int i, val, len, ret;
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u32 range[4];
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const fdt32_t *calibration;
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struct imx_tmu_plat *pdata = dev_get_platdata(dev);
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debug("%s\n", __func__);
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ret = dev_read_u32_array(dev, "fsl,tmu-range", range, 4);
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if (ret) {
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printf("TMU: missing calibration range, ret = %d.\n", ret);
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return ret;
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}
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/* Init temperature range registers */
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writel(range[0], &pdata->regs->ttr0cr);
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writel(range[1], &pdata->regs->ttr1cr);
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writel(range[2], &pdata->regs->ttr2cr);
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writel(range[3], &pdata->regs->ttr3cr);
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calibration = dev_read_prop(dev, "fsl,tmu-calibration", &len);
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if (!calibration || len % 8) {
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printf("TMU: invalid calibration data.\n");
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return -ENODEV;
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}
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for (i = 0; i < len; i += 8, calibration += 2) {
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val = fdt32_to_cpu(*calibration);
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writel(val, &pdata->regs->ttcfgr);
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val = fdt32_to_cpu(*(calibration + 1));
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writel(val, &pdata->regs->tscfgr);
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}
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return 0;
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}
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static void imx_tmu_init(struct imx_tmu_plat *pdata)
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{
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debug("%s\n", __func__);
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/* Disable monitoring */
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writel(TMR_DISABLE, &pdata->regs->tmr);
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/* Disable interrupt, using polling instead */
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writel(TIER_DISABLE, &pdata->regs->tier);
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/* Set update_interval */
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writel(TMTMIR_DEFAULT, &pdata->regs->tmtmir);
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}
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static int imx_tmu_enable_msite(struct udevice *dev)
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{
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struct imx_tmu_plat *pdata = dev_get_platdata(dev);
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u32 reg;
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debug("%s\n", __func__);
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if (!pdata->regs)
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return -EIO;
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/* Clear the ME before setting MSITE and ALPF*/
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reg = readl(&pdata->regs->tmr);
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reg &= ~TMR_ME;
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writel(reg, &pdata->regs->tmr);
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reg |= 1 << (15 - pdata->id);
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reg |= TMR_ALPF;
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writel(reg, &pdata->regs->tmr);
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/* Enable ME */
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reg |= TMR_ME;
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writel(reg, &pdata->regs->tmr);
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return 0;
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}
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static int imx_tmu_bind(struct udevice *dev)
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{
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struct imx_tmu_plat *pdata = dev_get_platdata(dev);
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int ret;
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ofnode node, offset;
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const char *name;
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const void *prop;
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debug("%s dev name %s\n", __func__, dev->name);
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prop = dev_read_prop(dev, "compatible", NULL);
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if (!prop)
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return 0;
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pdata->zone_node = 1;
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node = ofnode_path("/thermal-zones");
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ofnode_for_each_subnode(offset, node) {
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/* Bind the subnode to this driver */
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name = ofnode_get_name(offset);
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ret = device_bind_with_driver_data(dev, dev->driver, name,
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dev->driver_data, offset,
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NULL);
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if (ret)
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printf("Error binding driver '%s': %d\n",
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dev->driver->name, ret);
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}
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return 0;
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}
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static int imx_tmu_parse_fdt(struct udevice *dev)
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{
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struct imx_tmu_plat *pdata = dev_get_platdata(dev), *p_parent_data;
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struct ofnode_phandle_args args;
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ofnode trips_np;
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int ret;
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debug("%s dev name %s\n", __func__, dev->name);
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if (pdata->zone_node) {
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pdata->regs = (struct imx_tmu_regs *)dev_read_addr_ptr(dev);
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if (!pdata->regs)
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return -EINVAL;
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return 0;
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}
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p_parent_data = dev_get_platdata(dev->parent);
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if (p_parent_data->zone_node)
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pdata->regs = p_parent_data->regs;
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ret = dev_read_phandle_with_args(dev, "thermal-sensors",
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"#thermal-sensor-cells",
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0, 0, &args);
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if (ret)
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return ret;
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if (!ofnode_equal(args.node, dev_ofnode(dev->parent)))
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return -EFAULT;
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if (args.args_count >= 1)
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pdata->id = args.args[0];
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else
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pdata->id = 0;
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debug("args.args_count %d, id %d\n", args.args_count, pdata->id);
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pdata->polling_delay = dev_read_u32_default(dev, "polling-delay", 1000);
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trips_np = ofnode_path("/thermal-zones/cpu-thermal/trips");
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ofnode_for_each_subnode(trips_np, trips_np) {
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const char *type;
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type = ofnode_get_property(trips_np, "type", NULL);
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if (!type)
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continue;
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if (!strcmp(type, "critical"))
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pdata->critical = ofnode_read_u32_default(trips_np, "temperature", 85);
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else if (strcmp(type, "passive") == 0)
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pdata->alert = ofnode_read_u32_default(trips_np, "temperature", 80);
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else
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continue;
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}
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debug("id %d polling_delay %d, critical %d, alert %d\n",
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pdata->id, pdata->polling_delay, pdata->critical, pdata->alert);
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return 0;
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}
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static int imx_tmu_probe(struct udevice *dev)
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{
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struct imx_tmu_plat *pdata = dev_get_platdata(dev);
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int ret;
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ret = imx_tmu_parse_fdt(dev);
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if (ret) {
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printf("Error in parsing TMU FDT %d\n", ret);
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return ret;
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}
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if (pdata->zone_node) {
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imx_tmu_init(pdata);
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imx_tmu_calibration(dev);
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} else {
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imx_tmu_enable_msite(dev);
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}
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return 0;
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}
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static const struct udevice_id imx_tmu_ids[] = {
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{ .compatible = "fsl,imx8mq-tmu", },
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{ }
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};
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U_BOOT_DRIVER(imx_tmu) = {
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.name = "imx_tmu",
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.id = UCLASS_THERMAL,
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.ops = &imx_tmu_ops,
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.of_match = imx_tmu_ids,
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.bind = imx_tmu_bind,
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.probe = imx_tmu_probe,
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.platdata_auto_alloc_size = sizeof(struct imx_tmu_plat),
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.flags = DM_FLAG_PRE_RELOC,
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};
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