Messages in this thread Patch in this message | | | From | Andrey Smirnov <> | Subject | [PATCH v7 08/12] thermal: qoriq: Convert driver to use regmap API | Date | Wed, 11 Sep 2019 18:34:43 -0700 |
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Convert driver to use regmap API, drop custom LE/BE IO helpers and simplify bit manipulation using regmap_update_bits(). This also allows us to convert some register initialization to use loops and adds convenient debug access to TMU registers via debugfs.
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Reviewed-by: Daniel Lezcano <daniel.lezcano@linaro.org> Tested-by: Lucas Stach <l.stach@pengutronix.de> Cc: Chris Healy <cphealy@gmail.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Eduardo Valentin <edubezval@gmail.com> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Angus Ainslie (Purism) <angus@akkea.ca> Cc: linux-imx@nxp.com Cc: linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org --- drivers/thermal/qoriq_thermal.c | 153 +++++++++++++++----------------- 1 file changed, 72 insertions(+), 81 deletions(-)
diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c index 8a28a4433d44..32bf5ed57f5c 100644 --- a/drivers/thermal/qoriq_thermal.c +++ b/drivers/thermal/qoriq_thermal.c @@ -9,6 +9,7 @@ #include <linux/io.h> #include <linux/of.h> #include <linux/of_address.h> +#include <linux/regmap.h> #include <linux/thermal.h> #include "thermal_core.h" @@ -18,48 +19,27 @@ /* * QorIQ TMU Registers */ -struct qoriq_tmu_site_regs { - u32 tritsr; /* Immediate Temperature Site Register */ - u32 tratsr; /* Average Temperature Site Register */ - u8 res0[0x8]; -}; -struct qoriq_tmu_regs { - u32 tmr; /* Mode Register */ +#define REGS_TMR 0x000 /* 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 REGS_TMTMIR 0x008 /* Temperature measurement interval Register */ #define TMTMIR_DEFAULT 0x0000000f - u8 res0[0x14]; - u32 tier; /* Interrupt Enable Register */ + +#define REGS_TIER 0x020 /* 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 */ - u8 res1[0x10]; - u32 tmhtcrh; /* High Temperature Capture Register */ - u32 tmhtcrl; /* Low Temperature Capture Register */ - u8 res2[0x8]; - u32 tmhtitr; /* High Temperature Immediate Threshold */ - u32 tmhtatr; /* High Temperature Average Threshold */ - u32 tmhtactr; /* High Temperature Average Crit Threshold */ - u8 res3[0x24]; - u32 ttcfgr; /* Temperature Configuration Register */ - u32 tscfgr; /* Sensor Configuration Register */ - u8 res4[0x78]; - struct qoriq_tmu_site_regs site[SITES_MAX]; - u8 res5[0x9f8]; - 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 */ -}; +#define REGS_TTCFGR 0x080 /* Temperature Configuration Register */ +#define REGS_TSCFGR 0x084 /* Sensor Configuration Register */ + +#define REGS_TRITSR(n) (0x100 + 16 * (n)) /* Immediate Temperature + * Site Register + */ +#define REGS_TTRnCR(n) (0xf10 + 4 * (n)) /* Temperature Range n + * Control Register + */ /* * Thermal zone data */ @@ -68,9 +48,8 @@ struct qoriq_sensor { }; struct qoriq_tmu_data { - struct qoriq_tmu_regs __iomem *regs; + struct regmap *regmap; struct clk *clk; - bool little_endian; struct qoriq_sensor sensor[SITES_MAX]; }; @@ -79,29 +58,13 @@ static struct qoriq_tmu_data *qoriq_sensor_to_data(struct qoriq_sensor *s) return container_of(s, struct qoriq_tmu_data, sensor[s->id]); } -static void tmu_write(struct qoriq_tmu_data *p, u32 val, void __iomem *addr) -{ - if (p->little_endian) - iowrite32(val, addr); - else - iowrite32be(val, addr); -} - -static u32 tmu_read(struct qoriq_tmu_data *p, void __iomem *addr) -{ - if (p->little_endian) - return ioread32(addr); - else - return ioread32be(addr); -} - static int tmu_get_temp(void *p, int *temp) { struct qoriq_sensor *qsensor = p; struct qoriq_tmu_data *qdata = qoriq_sensor_to_data(qsensor); u32 val; - val = tmu_read(qdata, &qdata->regs->site[qsensor->id].tritsr); + regmap_read(qdata->regmap, REGS_TRITSR(qsensor->id), &val); *temp = (val & 0xff) * 1000; return 0; @@ -139,7 +102,8 @@ static int qoriq_tmu_register_tmu_zone(struct device *dev, /* Enable monitoring */ if (sites != 0) - tmu_write(qdata, sites | TMR_ME | TMR_ALPF, &qdata->regs->tmr); + regmap_write(qdata->regmap, REGS_TMR, + sites | TMR_ME | TMR_ALPF); return 0; } @@ -158,10 +122,8 @@ static int qoriq_tmu_calibration(struct device *dev, } /* 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 < ARRAY_SIZE(range); i++) + regmap_write(data->regmap, REGS_TTRnCR(i), range[i]); calibration = of_get_property(np, "fsl,tmu-calibration", &len); if (calibration == NULL || len % 8) { @@ -171,9 +133,9 @@ static int qoriq_tmu_calibration(struct device *dev, for (i = 0; i < len; i += 8, calibration += 2) { val = of_read_number(calibration, 1); - tmu_write(data, val, &data->regs->ttcfgr); + regmap_write(data->regmap, REGS_TTCFGR, val); val = of_read_number(calibration + 1, 1); - tmu_write(data, val, &data->regs->tscfgr); + regmap_write(data->regmap, REGS_TSCFGR, val); } return 0; @@ -182,33 +144,68 @@ static int qoriq_tmu_calibration(struct device *dev, static void qoriq_tmu_init_device(struct qoriq_tmu_data *data) { /* Disable interrupt, using polling instead */ - tmu_write(data, TIER_DISABLE, &data->regs->tier); + regmap_write(data->regmap, REGS_TIER, TIER_DISABLE); /* Set update_interval */ - tmu_write(data, TMTMIR_DEFAULT, &data->regs->tmtmir); + regmap_write(data->regmap, REGS_TMTMIR, TMTMIR_DEFAULT); /* Disable monitoring */ - tmu_write(data, TMR_DISABLE, &data->regs->tmr); + regmap_write(data->regmap, REGS_TMR, TMR_DISABLE); } +static const struct regmap_range qoriq_yes_ranges[] = { + regmap_reg_range(REGS_TMR, REGS_TSCFGR), + regmap_reg_range(REGS_TTRnCR(0), REGS_TTRnCR(3)), + /* Read only registers below */ + regmap_reg_range(REGS_TRITSR(0), REGS_TRITSR(15)), +}; + +static const struct regmap_access_table qoriq_wr_table = { + .yes_ranges = qoriq_yes_ranges, + .n_yes_ranges = ARRAY_SIZE(qoriq_yes_ranges) - 1, +}; + +static const struct regmap_access_table qoriq_rd_table = { + .yes_ranges = qoriq_yes_ranges, + .n_yes_ranges = ARRAY_SIZE(qoriq_yes_ranges), +}; + static int qoriq_tmu_probe(struct platform_device *pdev) { int ret; struct qoriq_tmu_data *data; struct device_node *np = pdev->dev.of_node; struct device *dev = &pdev->dev; + const bool little_endian = of_property_read_bool(np, "little-endian"); + const enum regmap_endian format_endian = + little_endian ? REGMAP_ENDIAN_LITTLE : REGMAP_ENDIAN_BIG; + const struct regmap_config regmap_config = { + .reg_bits = 32, + .val_bits = 32, + .reg_stride = 4, + .rd_table = &qoriq_rd_table, + .wr_table = &qoriq_wr_table, + .val_format_endian = format_endian, + .max_register = SZ_4K, + }; + void __iomem *base; data = devm_kzalloc(dev, sizeof(struct qoriq_tmu_data), GFP_KERNEL); if (!data) return -ENOMEM; - data->little_endian = of_property_read_bool(np, "little-endian"); - - data->regs = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(data->regs)) { + base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(base)) { dev_err(dev, "Failed to get memory region\n"); - return PTR_ERR(data->regs); + return PTR_ERR(base); + } + + data->regmap = devm_regmap_init_mmio(dev, base, ®map_config); + ret = PTR_ERR_OR_ZERO(data->regmap); + if (ret) { + dev_err(dev, "Failed to init regmap (%d)\n", ret); + return ret; } data->clk = devm_clk_get_optional(dev, NULL); @@ -249,7 +246,7 @@ static int qoriq_tmu_remove(struct platform_device *pdev) struct qoriq_tmu_data *data = platform_get_drvdata(pdev); /* Disable monitoring */ - tmu_write(data, TMR_DISABLE, &data->regs->tmr); + regmap_write(data->regmap, REGS_TMR, TMR_DISABLE); clk_disable_unprepare(data->clk); @@ -258,13 +255,12 @@ static int qoriq_tmu_remove(struct platform_device *pdev) static int __maybe_unused qoriq_tmu_suspend(struct device *dev) { - u32 tmr; struct qoriq_tmu_data *data = dev_get_drvdata(dev); + int ret; - /* Disable monitoring */ - tmr = tmu_read(data, &data->regs->tmr); - tmr &= ~TMR_ME; - tmu_write(data, tmr, &data->regs->tmr); + ret = regmap_update_bits(data->regmap, REGS_TMR, TMR_ME, 0); + if (ret) + return ret; clk_disable_unprepare(data->clk); @@ -273,7 +269,6 @@ static int __maybe_unused qoriq_tmu_suspend(struct device *dev) static int __maybe_unused qoriq_tmu_resume(struct device *dev) { - u32 tmr; int ret; struct qoriq_tmu_data *data = dev_get_drvdata(dev); @@ -282,11 +277,7 @@ static int __maybe_unused qoriq_tmu_resume(struct device *dev) return ret; /* Enable monitoring */ - tmr = tmu_read(data, &data->regs->tmr); - tmr |= TMR_ME; - tmu_write(data, tmr, &data->regs->tmr); - - return 0; + return regmap_update_bits(data->regmap, REGS_TMR, TMR_ME, TMR_ME); } static SIMPLE_DEV_PM_OPS(qoriq_tmu_pm_ops, -- 2.21.0
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