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Date: Tue, 26 Feb 2013 18:53:25 -0400
From: Eduardo Valentin <eduardo.valentin@...com>
To: <gregkh@...uxfoundation.org>
CC: <devel@...verdev.osuosl.org>, <linux-omap@...r.kernel.org>,
<linux-kernel@...r.kernel.org>,
Radhesh Fadnis <radhesh.fadnis@...com>,
Eduardo Valentin <eduardo.valentin@...com>
Subject: [PATCH 02/15] staging: omap-thermal: introduce clock feature flag
From: Radhesh Fadnis <radhesh.fadnis@...com>
The clock to Bandgap module is SW controlled on some version of
OMAP silicon (OMAP44xx). But on OMAP54xx ES2.0
onwards this is HW-Auto controlled. Hence introduce a feature flag
to use/not-to-use SW enable/disable of BG clock.
Signed-off-by: Radhesh Fadnis <radhesh.fadnis@...com>
Signed-off-by: Eduardo Valentin <eduardo.valentin@...com>
---
drivers/staging/omap-thermal/omap-bandgap.c | 18 +++++++++++++-----
drivers/staging/omap-thermal/omap-bandgap.h | 1 +
drivers/staging/omap-thermal/omap4-thermal.c | 3 +++
drivers/staging/omap-thermal/omap5-thermal.c | 3 ++-
4 files changed, 19 insertions(+), 6 deletions(-)
diff --git a/drivers/staging/omap-thermal/omap-bandgap.c b/drivers/staging/omap-thermal/omap-bandgap.c
index 35b9915..80384ed 100644
--- a/drivers/staging/omap-thermal/omap-bandgap.c
+++ b/drivers/staging/omap-thermal/omap-bandgap.c
@@ -914,7 +914,9 @@ int omap_bandgap_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "Cannot re-set clock rate. Continuing\n");
bg_ptr->clk_rate = clk_rate;
- clk_enable(bg_ptr->fclock);
+ if (OMAP_BANDGAP_HAS(bg_ptr, CLK_CTRL))
+ clk_enable(bg_ptr->fclock);
+
mutex_init(&bg_ptr->bg_mutex);
bg_ptr->dev = &pdev->dev;
@@ -982,7 +984,8 @@ int omap_bandgap_probe(struct platform_device *pdev)
return 0;
disable_clk:
- clk_disable(bg_ptr->fclock);
+ if (OMAP_BANDGAP_HAS(bg_ptr, CLK_CTRL))
+ clk_disable(bg_ptr->fclock);
put_clks:
clk_put(bg_ptr->fclock);
clk_put(bg_ptr->div_clk);
@@ -1012,7 +1015,8 @@ int omap_bandgap_remove(struct platform_device *pdev)
omap_bandgap_power(bg_ptr, false);
- clk_disable(bg_ptr->fclock);
+ if (OMAP_BANDGAP_HAS(bg_ptr, CLK_CTRL))
+ clk_disable(bg_ptr->fclock);
clk_put(bg_ptr->fclock);
clk_put(bg_ptr->div_clk);
@@ -1109,7 +1113,9 @@ static int omap_bandgap_suspend(struct device *dev)
err = omap_bandgap_save_ctxt(bg_ptr);
omap_bandgap_power(bg_ptr, false);
- clk_disable(bg_ptr->fclock);
+
+ if (OMAP_BANDGAP_HAS(bg_ptr, CLK_CTRL))
+ clk_disable(bg_ptr->fclock);
return err;
}
@@ -1118,7 +1124,9 @@ static int omap_bandgap_resume(struct device *dev)
{
struct omap_bandgap *bg_ptr = dev_get_drvdata(dev);
- clk_enable(bg_ptr->fclock);
+ if (OMAP_BANDGAP_HAS(bg_ptr, CLK_CTRL))
+ clk_enable(bg_ptr->fclock);
+
omap_bandgap_power(bg_ptr, true);
return omap_bandgap_restore_ctxt(bg_ptr);
diff --git a/drivers/staging/omap-thermal/omap-bandgap.h b/drivers/staging/omap-thermal/omap-bandgap.h
index 2bb14bd..85e1a2f 100644
--- a/drivers/staging/omap-thermal/omap-bandgap.h
+++ b/drivers/staging/omap-thermal/omap-bandgap.h
@@ -384,6 +384,7 @@ struct omap_bandgap_data {
#define OMAP_BANDGAP_FEATURE_MODE_CONFIG (1 << 3)
#define OMAP_BANDGAP_FEATURE_COUNTER (1 << 4)
#define OMAP_BANDGAP_FEATURE_POWER_SWITCH (1 << 5)
+#define OMAP_BANDGAP_FEATURE_CLK_CTRL (1 << 6)
#define OMAP_BANDGAP_HAS(b, f) \
((b)->conf->features & OMAP_BANDGAP_FEATURE_ ## f)
unsigned int features;
diff --git a/drivers/staging/omap-thermal/omap4-thermal.c b/drivers/staging/omap-thermal/omap4-thermal.c
index 04c02b6..732c853 100644
--- a/drivers/staging/omap-thermal/omap4-thermal.c
+++ b/drivers/staging/omap-thermal/omap4-thermal.c
@@ -69,6 +69,7 @@ omap4430_adc_to_temp[OMAP4430_ADC_END_VALUE - OMAP4430_ADC_START_VALUE + 1] = {
/* OMAP4430 data */
const struct omap_bandgap_data omap4430_data = {
.features = OMAP_BANDGAP_FEATURE_MODE_CONFIG |
+ OMAP_BANDGAP_FEATURE_CLK_CTRL |
OMAP_BANDGAP_FEATURE_POWER_SWITCH,
.fclock_name = "bandgap_fclk",
.div_ck_name = "bandgap_fclk",
@@ -207,6 +208,7 @@ const struct omap_bandgap_data omap4460_data = {
OMAP_BANDGAP_FEATURE_TALERT |
OMAP_BANDGAP_FEATURE_MODE_CONFIG |
OMAP_BANDGAP_FEATURE_POWER_SWITCH |
+ OMAP_BANDGAP_FEATURE_CLK_CTRL |
OMAP_BANDGAP_FEATURE_COUNTER,
.fclock_name = "bandgap_ts_fclk",
.div_ck_name = "div_ts_ck",
@@ -236,6 +238,7 @@ const struct omap_bandgap_data omap4470_data = {
OMAP_BANDGAP_FEATURE_TALERT |
OMAP_BANDGAP_FEATURE_MODE_CONFIG |
OMAP_BANDGAP_FEATURE_POWER_SWITCH |
+ OMAP_BANDGAP_FEATURE_CLK_CTRL |
OMAP_BANDGAP_FEATURE_COUNTER,
.fclock_name = "bandgap_ts_fclk",
.div_ck_name = "div_ts_ck",
diff --git a/drivers/staging/omap-thermal/omap5-thermal.c b/drivers/staging/omap-thermal/omap5-thermal.c
index 2f3a498..8fca21b 100644
--- a/drivers/staging/omap-thermal/omap5-thermal.c
+++ b/drivers/staging/omap-thermal/omap5-thermal.c
@@ -260,7 +260,8 @@ const struct omap_bandgap_data omap5430_data = {
.features = OMAP_BANDGAP_FEATURE_TSHUT_CONFIG |
OMAP_BANDGAP_FEATURE_TALERT |
OMAP_BANDGAP_FEATURE_MODE_CONFIG |
- OMAP_BANDGAP_FEATURE_COUNTER,
+ OMAP_BANDGAP_FEATURE_COUNTER |
+ OMAP_BANDGAP_FEATURE_CLK_CTRL,
.fclock_name = "ts_clk_div_ck",
.div_ck_name = "ts_clk_div_ck",
.conv_table = omap5430_adc_to_temp,
--
1.7.7.1.488.ge8e1c
--
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