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Commit 9879b2c4 authored by Eduardo Valentin's avatar Eduardo Valentin Committed by Greg Kroah-Hartman
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staging: ti-soc-thermal: split writable data from readonly data 

This patch changes the data structures of this driver so
that readonly data can reside only in the conf pointer.
Now each register has a struct to hold its configuration info,
to be used base on chip version for instance, and a
struct of values to be written, like register shadow and priv data.
Signed-off-by: default avatarEduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 2f8ec2a9
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Inline Side-by-side
Showing with 51 additions and 36 deletions
drivers/staging/ti-soc-thermal/ti-bandgap.c
View file @ 9879b2c4
......@@ -248,7 +248,7 @@ static irqreturn_t ti_bandgap_tshut_irq_handler(int irq, void *data)
static
int ti_bandgap_adc_to_mcelsius(struct ti_bandgap *bgp, int adc_val, int *t)
{
struct ti_bandgap_data *conf = bgp->conf;
const struct ti_bandgap_data *conf = bgp->conf;
int ret = 0;
/* look up for temperature in the table and return the temperature */
......@@ -276,7 +276,7 @@ int ti_bandgap_adc_to_mcelsius(struct ti_bandgap *bgp, int adc_val, int *t)
static
int ti_bandgap_mcelsius_to_adc(struct ti_bandgap *bgp, long temp, int *adc)
{
struct ti_bandgap_data *conf = bgp->conf;
const struct ti_bandgap_data *conf = bgp->conf;
const int *conv_table = bgp->conf->conv_table;
int high, low, mid, ret = 0;
......@@ -724,7 +724,7 @@ int ti_bandgap_set_sensor_data(struct ti_bandgap *bgp, int id, void *data)
if (ret)
return ret;
bgp->conf->sensors[id].data = data;
bgp->regval[id].data = data;
return 0;
}
......@@ -743,7 +743,7 @@ void *ti_bandgap_get_sensor_data(struct ti_bandgap *bgp, int id)
if (ret)
return ERR_PTR(ret);
return bgp->conf->sensors[id].data;
return bgp->regval[id].data;
}
/*** Helper functions used during device initialization ***/
......@@ -911,6 +911,14 @@ static struct ti_bandgap *ti_bandgap_build(struct platform_device *pdev)
if (of_id)
bgp->conf = of_id->data;
/* register shadow for context save and restore */
bgp->regval = devm_kzalloc(&pdev->dev, sizeof(*bgp->regval) *
bgp->conf->sensor_count, GFP_KERNEL);
if (!bgp) {
dev_err(&pdev->dev, "Unable to allocate mem for driver ref\n");
return ERR_PTR(-ENOMEM);
}
i = 0;
do {
void __iomem *chunk;
......@@ -1147,7 +1155,7 @@ static int ti_bandgap_save_ctxt(struct ti_bandgap *bgp)
struct temp_sensor_registers *tsr;
struct temp_sensor_regval *rval;
rval = &bgp->conf->sensors[i].regval;
rval = &bgp->regval[i];
tsr = bgp->conf->sensors[i].registers;
if (TI_BANDGAP_HAS(bgp, MODE_CONFIG))
......@@ -1180,7 +1188,7 @@ static int ti_bandgap_restore_ctxt(struct ti_bandgap *bgp)
struct temp_sensor_regval *rval;
u32 val = 0;
rval = &bgp->conf->sensors[i].regval;
rval = &bgp->regval[i];
tsr = bgp->conf->sensors[i].registers;
if (TI_BANDGAP_HAS(bgp, COUNTER))
......
drivers/staging/ti-soc-thermal/ti-bandgap.h
View file @ 9879b2c4
......@@ -30,6 +30,13 @@
/**
* DOC: bandgap driver data structure
* ==================================
*
* +----------+----------------+
* | struct temp_sensor_regval |
* +---------------------------+
* * (Array of)
* |
* |
* +-------------------+ +-----------------+
* | struct ti_bandgap |-->| struct device * |
* +----------+--------+ +-----------------+
......@@ -47,11 +54,11 @@
* | | struct ti_temp_sensor |-->| struct temp_sensor_data | |
* | +-----------------------+ +------------+------------+ |
* | | |
* | +--------------------------+ |
* | V V |
* | +----------+- --------------+ +----+-------------------------+ |
* | | struct temp_sensor_regval | | struct temp_sensor_registers | |
* | +---------------------------+ +------------------------------+ |
* | + |
* | V |
* | +----------+-------------------+ |
* | | struct temp_sensor_registers | |
* | +------------------------------+ |
* | |
* +-------------------------------------------------------------------+
*
......@@ -189,11 +196,33 @@ struct temp_sensor_data {
struct ti_bandgap_data;
/**
* struct temp_sensor_regval - temperature sensor register values and priv data
* @bg_mode_ctrl: temp sensor control register value
* @bg_ctrl: bandgap ctrl register value
* @bg_counter: bandgap counter value
* @bg_threshold: bandgap threshold register value
* @tshut_threshold: bandgap tshut register value
* @data: private data
*
* Data structure to save and restore bandgap register set context. Only
* required registers are shadowed, when needed.
*/
struct temp_sensor_regval {
u32 bg_mode_ctrl;
u32 bg_ctrl;
u32 bg_counter;
u32 bg_threshold;
u32 tshut_threshold;
void *data;
};
/**
* struct ti_bandgap - bandgap device structure
* @dev: struct device pointer
* @base: io memory base address
* @conf: struct with bandgap configuration set (# sensors, conv_table, etc)
* @regval: temperature sensor register values
* @fclock: pointer to functional clock of temperature sensor
* @div_clk: pointer to divider clock of temperature sensor fclk
* @bg_mutex: mutex for ti_bandgap structure
......@@ -208,7 +237,8 @@ struct ti_bandgap_data;
struct ti_bandgap {
struct device *dev;
void __iomem *base;
struct ti_bandgap_data *conf;
const struct ti_bandgap_data *conf;
struct temp_sensor_regval *regval;
struct clk *fclock;
struct clk *div_clk;
spinlock_t lock; /* shields this struct */
......@@ -217,30 +247,10 @@ struct ti_bandgap {
u32 clk_rate;
};
/**
* struct temp_sensor_regval - temperature sensor register values
* @bg_mode_ctrl: temp sensor control register value
* @bg_ctrl: bandgap ctrl register value
* @bg_counter: bandgap counter value
* @bg_threshold: bandgap threshold register value
* @tshut_threshold: bandgap tshut register value
*
* Data structure to save and restore bandgap register set context. Only
* required registers are shadowed, when needed.
*/
struct temp_sensor_regval {
u32 bg_mode_ctrl;
u32 bg_ctrl;
u32 bg_counter;
u32 bg_threshold;
u32 tshut_threshold;
};
/**
* struct ti_temp_sensor - bandgap temperature sensor configuration data
* @ts_data: pointer to struct with thresholds, limits of temperature sensor
* @registers: pointer to the list of register offsets and bitfields
* @regval: temperature sensor register values
* @domain: the name of the domain where the sensor is located
* @slope: sensor gradient slope info for hotspot extrapolation equation
* @const: sensor gradient const info for hotspot extrapolation equation
......@@ -248,7 +258,6 @@ struct temp_sensor_regval {
* with no external influence
* @constant_pcb: sensor gradient const info for hotspot extrapolation equation
* with no external influence
* @data: private data
* @register_cooling: function to describe how this sensor is going to be cooled
* @unregister_cooling: function to release cooling data
*
......@@ -261,14 +270,12 @@ struct temp_sensor_regval {
struct ti_temp_sensor {
struct temp_sensor_data *ts_data;
struct temp_sensor_registers *registers;
struct temp_sensor_regval regval;
char *domain;
/* for hotspot extrapolation */
const int slope;
const int constant;
const int slope_pcb;
const int constant_pcb;
void *data;
int (*register_cooling)(struct ti_bandgap *bgp, int id);
int (*unregister_cooling)(struct ti_bandgap *bgp, int id);
};
......
drivers/staging/ti-soc-thermal/ti-thermal-common.c
View file @ 9879b2c4
......@@ -79,7 +79,7 @@ static inline int ti_thermal_get_temp(struct thermal_zone_device *thermal,
{
struct ti_thermal_data *data = thermal->devdata;
struct ti_bandgap *bgp;
struct ti_temp_sensor *s;
const struct ti_temp_sensor *s;
int ret, tmp, pcb_temp, slope, constant;
if (!data)
......
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