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Subject[PATCH 4/6] thermal: qoriq: Add clock operations
Date
From: Anson Huang <Anson.Huang@nxp.com>

Some platforms like i.MX8MQ has clock control for this module,
need to add clock operations to make sure the driver is working
properly.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
---
drivers/thermal/qoriq_thermal.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/drivers/thermal/qoriq_thermal.c b/drivers/thermal/qoriq_thermal.c
index 2b2f79b..0813c1b 100644
--- a/drivers/thermal/qoriq_thermal.c
+++ b/drivers/thermal/qoriq_thermal.c
@@ -2,6 +2,7 @@
//
// Copyright 2016 Freescale Semiconductor, Inc.

+#include <linux/clk.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/err.h>
@@ -72,6 +73,7 @@ struct qoriq_sensor {

struct qoriq_tmu_data {
struct qoriq_tmu_regs __iomem *regs;
+ struct clk *clk;
bool little_endian;
struct qoriq_sensor *sensor[SITES_MAX];
};
@@ -208,6 +210,19 @@ static int qoriq_tmu_probe(struct platform_device *pdev)
return PTR_ERR(data->regs);
}

+ data->clk = devm_clk_get(&pdev->dev, NULL);
+ if (IS_ERR(data->clk)) {
+ if (PTR_ERR(data->clk) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ data->clk = NULL;
+ }
+
+ ret = clk_prepare_enable(data->clk);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to enable clock\n");
+ return ret;
+ }
+
qoriq_tmu_init_device(data); /* TMU initialization */

ret = qoriq_tmu_calibration(pdev); /* TMU calibration */
@@ -235,6 +250,8 @@ static int qoriq_tmu_remove(struct platform_device *pdev)
/* Disable monitoring */
tmu_write(data, TMR_DISABLE, &data->regs->tmr);

+ clk_disable_unprepare(data->clk);
+
platform_set_drvdata(pdev, NULL);

return 0;
@@ -250,14 +267,21 @@ static int __maybe_unused qoriq_tmu_suspend(struct device *dev)
tmr &= ~TMR_ME;
tmu_write(data, tmr, &data->regs->tmr);

+ clk_disable_unprepare(data->clk);
+
return 0;
}

static int __maybe_unused qoriq_tmu_resume(struct device *dev)
{
u32 tmr;
+ int ret;
struct qoriq_tmu_data *data = dev_get_drvdata(dev);

+ ret = clk_prepare_enable(data->clk);
+ if (ret)
+ return ret;
+
/* Enable monitoring */
tmr = tmu_read(data, &data->regs->tmr);
tmr |= TMR_ME;
--
2.7.4
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