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153 lines
4.6 KiB
Diff
153 lines
4.6 KiB
Diff
From d1066d775e67c33cc93178475c4485c5ef0a83c9 Mon Sep 17 00:00:00 2001
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From: Stefan Wahren <wahrenst@gmx.net>
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Date: Sat, 18 May 2019 12:26:11 +0200
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Subject: [PATCH] thermal: brcmstb_thermal: Add BCM2838 support
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The BCM2838 has an AVS TMON hardware block. This adds the necessary
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support to the brcmstb_thermal driver ( no trip handling ).
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Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
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---
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drivers/thermal/broadcom/Kconfig | 2 +-
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drivers/thermal/broadcom/brcmstb_thermal.c | 61 +++++++++++++++++++---
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2 files changed, 54 insertions(+), 9 deletions(-)
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--- a/drivers/thermal/broadcom/Kconfig
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+++ b/drivers/thermal/broadcom/Kconfig
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@@ -9,7 +9,7 @@ config BCM2835_THERMAL
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config BRCMSTB_THERMAL
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tristate "Broadcom STB AVS TMON thermal driver"
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- depends on ARCH_BRCMSTB || COMPILE_TEST
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+ depends on ARCH_BRCMSTB || ARCH_BCM2835 || COMPILE_TEST
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help
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Enable this driver if you have a Broadcom STB SoC and would like
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thermal framework support.
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--- a/drivers/thermal/broadcom/brcmstb_thermal.c
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+++ b/drivers/thermal/broadcom/brcmstb_thermal.c
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@@ -10,6 +10,7 @@
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#define pr_fmt(fmt) DRV_NAME ": " fmt
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#include <linux/bitops.h>
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+#include <linux/clk.h>
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#include <linux/device.h>
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#include <linux/err.h>
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#include <linux/io.h>
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@@ -22,9 +23,6 @@
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#include <linux/thermal.h>
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#define AVS_TMON_STATUS 0x00
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- #define AVS_TMON_STATUS_valid_msk BIT(11)
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- #define AVS_TMON_STATUS_data_msk GENMASK(10, 1)
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- #define AVS_TMON_STATUS_data_shift 1
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#define AVS_TMON_EN_OVERTEMP_RESET 0x04
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#define AVS_TMON_EN_OVERTEMP_RESET_msk BIT(0)
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@@ -102,10 +100,19 @@ static struct avs_tmon_trip avs_tmon_tri
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},
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};
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+struct brcmstb_thermal_of_data {
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+ const struct thermal_zone_of_device_ops *of_ops;
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+ u32 status_valid_mask;
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+ u32 status_data_mask;
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+ u32 status_data_shift;
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+};
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+
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struct brcmstb_thermal_priv {
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void __iomem *tmon_base;
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struct device *dev;
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struct thermal_zone_device *thermal;
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+ struct clk *clk;
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+ const struct brcmstb_thermal_of_data *socdata;
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};
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/* Convert a HW code to a temperature reading (millidegree celsius) */
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@@ -142,17 +149,18 @@ static inline u32 avs_tmon_temp_to_code(
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static int brcmstb_get_temp(void *data, int *temp)
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{
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struct brcmstb_thermal_priv *priv = data;
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+ const struct brcmstb_thermal_of_data *socdata = priv->socdata;
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u32 val;
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long t;
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val = __raw_readl(priv->tmon_base + AVS_TMON_STATUS);
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- if (!(val & AVS_TMON_STATUS_valid_msk)) {
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+ if (!(val & socdata->status_valid_mask)) {
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dev_err(priv->dev, "reading not valid\n");
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return -EIO;
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}
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- val = (val & AVS_TMON_STATUS_data_msk) >> AVS_TMON_STATUS_data_shift;
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+ val = (val & socdata->status_data_mask) >> socdata->status_data_shift;
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t = avs_tmon_code_to_temp(priv->thermal, val);
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if (t < 0)
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@@ -277,13 +285,34 @@ static int brcmstb_set_trips(void *data,
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return 0;
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}
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-static const struct thermal_zone_of_device_ops of_ops = {
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+static const struct thermal_zone_of_device_ops bcm7445_thermal_of_ops = {
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.get_temp = brcmstb_get_temp,
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.set_trips = brcmstb_set_trips,
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};
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+static const struct thermal_zone_of_device_ops bcm2838_thermal_of_ops = {
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+ .get_temp = brcmstb_get_temp,
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+};
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+
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+static const struct brcmstb_thermal_of_data bcm7445_thermal_of_data = {
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+ .of_ops = &bcm7445_thermal_of_ops,
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+ .status_valid_mask = BIT(11),
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+ .status_data_mask = GENMASK(10, 1),
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+ .status_data_shift = 1,
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+};
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+
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+static const struct brcmstb_thermal_of_data bcm2838_thermal_of_data = {
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+ .of_ops = &bcm2838_thermal_of_ops,
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+ .status_valid_mask = BIT(10),
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+ .status_data_mask = GENMASK(9, 0),
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+ .status_data_shift = 0,
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+};
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+
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static const struct of_device_id brcmstb_thermal_id_table[] = {
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- { .compatible = "brcm,avs-tmon" },
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+ { .compatible = "brcm,avs-tmon",
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+ .data = &bcm7445_thermal_of_data },
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+ { .compatible = "brcm,avs-tmon-bcm2838",
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+ .data = &bcm2838_thermal_of_data },
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{},
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};
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MODULE_DEVICE_TABLE(of, brcmstb_thermal_id_table);
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@@ -304,11 +333,27 @@ static int brcmstb_thermal_probe(struct
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if (IS_ERR(priv->tmon_base))
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return PTR_ERR(priv->tmon_base);
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+ priv->socdata = of_device_get_match_data(&pdev->dev);
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+ if (!priv->socdata) {
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+ dev_err(&pdev->dev, "no device match found\n");
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+ return -ENODEV;
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+ }
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+
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+ priv->clk = devm_clk_get(&pdev->dev, NULL);
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+ if (IS_ERR(priv->clk) && PTR_ERR(priv->clk) == -EPROBE_DEFER)
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+ return -EPROBE_DEFER;
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+
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+ if (!IS_ERR(priv->clk)) {
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+ ret = clk_prepare_enable(priv->clk);
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+ if (ret)
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+ return ret;
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+ }
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+
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priv->dev = &pdev->dev;
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platform_set_drvdata(pdev, priv);
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thermal = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, priv,
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- &of_ops);
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+ priv->socdata->of_ops);
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if (IS_ERR(thermal)) {
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ret = PTR_ERR(thermal);
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dev_err(&pdev->dev, "could not register sensor: %d\n", ret);
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