staging: omap-thermal: introduce clock feature flag

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@ti.com>
Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/omap-thermal/omap-bandgap.c b/drivers/staging/omap-thermal/omap-bandgap.c
index 35b9915..80384ed 100644 (file)
--- 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 (file)
--- 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 (file)
--- 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 (file)
--- 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,