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path: root/arch/arm/mach-omap2/smartreflex.c
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Diffstat (limited to 'arch/arm/mach-omap2/smartreflex.c')
-rw-r--r--arch/arm/mach-omap2/smartreflex.c231
1 files changed, 170 insertions, 61 deletions
diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index 9dd93453e563..008fbd7b9352 100644
--- a/arch/arm/mach-omap2/smartreflex.c
+++ b/arch/arm/mach-omap2/smartreflex.c
@@ -36,6 +36,12 @@
#define SR_DISABLE_TIMEOUT 200
struct omap_sr {
+ struct list_head node;
+ struct platform_device *pdev;
+ struct omap_sr_nvalue_table *nvalue_table;
+ struct voltagedomain *voltdm;
+ struct dentry *dbg_dir;
+ unsigned int irq;
int srid;
int ip_type;
int nvalue_count;
@@ -49,13 +55,7 @@ struct omap_sr {
u32 senp_avgweight;
u32 senp_mod;
u32 senn_mod;
- unsigned int irq;
void __iomem *base;
- struct platform_device *pdev;
- struct list_head node;
- struct omap_sr_nvalue_table *nvalue_table;
- struct voltagedomain *voltdm;
- struct dentry *dbg_dir;
};
/* sr_list contains all the instances of smartreflex module */
@@ -74,10 +74,6 @@ static inline void sr_modify_reg(struct omap_sr *sr, unsigned offset, u32 mask,
u32 value)
{
u32 reg_val;
- u32 errconfig_offs = 0, errconfig_mask = 0;
-
- reg_val = __raw_readl(sr->base + offset);
- reg_val &= ~mask;
/*
* Smartreflex error config register is special as it contains
@@ -88,16 +84,15 @@ static inline void sr_modify_reg(struct omap_sr *sr, unsigned offset, u32 mask,
* if they are currently set, but does allow the caller to write
* those bits.
*/
- if (sr->ip_type == SR_TYPE_V1) {
- errconfig_offs = ERRCONFIG_V1;
- errconfig_mask = ERRCONFIG_STATUS_V1_MASK;
- } else if (sr->ip_type == SR_TYPE_V2) {
- errconfig_offs = ERRCONFIG_V2;
- errconfig_mask = ERRCONFIG_VPBOUNDINTST_V2;
- }
+ if (sr->ip_type == SR_TYPE_V1 && offset == ERRCONFIG_V1)
+ mask |= ERRCONFIG_STATUS_V1_MASK;
+ else if (sr->ip_type == SR_TYPE_V2 && offset == ERRCONFIG_V2)
+ mask |= ERRCONFIG_VPBOUNDINTST_V2;
+
+ reg_val = __raw_readl(sr->base + offset);
+ reg_val &= ~mask;
- if (offset == errconfig_offs)
- reg_val &= ~errconfig_mask;
+ value &= mask;
reg_val |= value;
@@ -128,21 +123,28 @@ static struct omap_sr *_sr_lookup(struct voltagedomain *voltdm)
static irqreturn_t sr_interrupt(int irq, void *data)
{
- struct omap_sr *sr_info = (struct omap_sr *)data;
+ struct omap_sr *sr_info = data;
u32 status = 0;
- if (sr_info->ip_type == SR_TYPE_V1) {
+ switch (sr_info->ip_type) {
+ case SR_TYPE_V1:
/* Read the status bits */
status = sr_read_reg(sr_info, ERRCONFIG_V1);
/* Clear them by writing back */
sr_write_reg(sr_info, ERRCONFIG_V1, status);
- } else if (sr_info->ip_type == SR_TYPE_V2) {
+ break;
+ case SR_TYPE_V2:
/* Read the status bits */
status = sr_read_reg(sr_info, IRQSTATUS);
/* Clear them by writing back */
sr_write_reg(sr_info, IRQSTATUS, status);
+ break;
+ default:
+ dev_err(&sr_info->pdev->dev, "UNKNOWN IP type %d\n",
+ sr_info->ip_type);
+ return IRQ_NONE;
}
if (sr_class->notify)
@@ -166,6 +168,7 @@ static void sr_set_clk_length(struct omap_sr *sr)
__func__);
return;
}
+
sys_clk_speed = clk_get_rate(sys_ck);
clk_put(sys_ck);
@@ -267,7 +270,7 @@ static int sr_late_init(struct omap_sr *sr_info)
goto error;
}
ret = request_irq(sr_info->irq, sr_interrupt,
- 0, name, (void *)sr_info);
+ 0, name, sr_info);
if (ret)
goto error;
disable_irq(sr_info->irq);
@@ -288,12 +291,15 @@ error:
"not function as desired\n", __func__);
kfree(name);
kfree(sr_info);
+
return ret;
}
static void sr_v1_disable(struct omap_sr *sr)
{
int timeout = 0;
+ int errconf_val = ERRCONFIG_MCUACCUMINTST | ERRCONFIG_MCUVALIDINTST |
+ ERRCONFIG_MCUBOUNDINTST;
/* Enable MCUDisableAcknowledge interrupt */
sr_modify_reg(sr, ERRCONFIG_V1,
@@ -302,13 +308,13 @@ static void sr_v1_disable(struct omap_sr *sr)
/* SRCONFIG - disable SR */
sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, 0x0);
- /* Disable all other SR interrupts and clear the status */
+ /* Disable all other SR interrupts and clear the status as needed */
+ if (sr_read_reg(sr, ERRCONFIG_V1) & ERRCONFIG_VPBOUNDINTST_V1)
+ errconf_val |= ERRCONFIG_VPBOUNDINTST_V1;
sr_modify_reg(sr, ERRCONFIG_V1,
(ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUVALIDINTEN |
ERRCONFIG_MCUBOUNDINTEN | ERRCONFIG_VPBOUNDINTEN_V1),
- (ERRCONFIG_MCUACCUMINTST | ERRCONFIG_MCUVALIDINTST |
- ERRCONFIG_MCUBOUNDINTST |
- ERRCONFIG_VPBOUNDINTST_V1));
+ errconf_val);
/*
* Wait for SR to be disabled.
@@ -337,9 +343,17 @@ static void sr_v2_disable(struct omap_sr *sr)
/* SRCONFIG - disable SR */
sr_modify_reg(sr, SRCONFIG, SRCONFIG_SRENABLE, 0x0);
- /* Disable all other SR interrupts and clear the status */
- sr_modify_reg(sr, ERRCONFIG_V2, ERRCONFIG_VPBOUNDINTEN_V2,
+ /*
+ * Disable all other SR interrupts and clear the status
+ * write to status register ONLY on need basis - only if status
+ * is set.
+ */
+ if (sr_read_reg(sr, ERRCONFIG_V2) & ERRCONFIG_VPBOUNDINTST_V2)
+ sr_modify_reg(sr, ERRCONFIG_V2, ERRCONFIG_VPBOUNDINTEN_V2,
ERRCONFIG_VPBOUNDINTST_V2);
+ else
+ sr_modify_reg(sr, ERRCONFIG_V2, ERRCONFIG_VPBOUNDINTEN_V2,
+ 0x0);
sr_write_reg(sr, IRQENABLE_CLR, (IRQENABLE_MCUACCUMINT |
IRQENABLE_MCUVALIDINT |
IRQENABLE_MCUBOUNDSINT));
@@ -398,15 +412,16 @@ static u32 sr_retrieve_nvalue(struct omap_sr *sr, u32 efuse_offs)
*/
int sr_configure_errgen(struct voltagedomain *voltdm)
{
- u32 sr_config, sr_errconfig, errconfig_offs, vpboundint_en;
- u32 vpboundint_st, senp_en = 0, senn_en = 0;
+ u32 sr_config, sr_errconfig, errconfig_offs;
+ u32 vpboundint_en, vpboundint_st;
+ u32 senp_en = 0, senn_en = 0;
u8 senp_shift, senn_shift;
struct omap_sr *sr = _sr_lookup(voltdm);
if (IS_ERR(sr)) {
pr_warning("%s: omap_sr struct for sr_%s not found\n",
__func__, voltdm->name);
- return -EINVAL;
+ return PTR_ERR(sr);
}
if (!sr->clk_length)
@@ -418,20 +433,23 @@ int sr_configure_errgen(struct voltagedomain *voltdm)
sr_config = (sr->clk_length << SRCONFIG_SRCLKLENGTH_SHIFT) |
SRCONFIG_SENENABLE | SRCONFIG_ERRGEN_EN;
- if (sr->ip_type == SR_TYPE_V1) {
+ switch (sr->ip_type) {
+ case SR_TYPE_V1:
sr_config |= SRCONFIG_DELAYCTRL;
senn_shift = SRCONFIG_SENNENABLE_V1_SHIFT;
senp_shift = SRCONFIG_SENPENABLE_V1_SHIFT;
errconfig_offs = ERRCONFIG_V1;
vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V1;
vpboundint_st = ERRCONFIG_VPBOUNDINTST_V1;
- } else if (sr->ip_type == SR_TYPE_V2) {
+ break;
+ case SR_TYPE_V2:
senn_shift = SRCONFIG_SENNENABLE_V2_SHIFT;
senp_shift = SRCONFIG_SENPENABLE_V2_SHIFT;
errconfig_offs = ERRCONFIG_V2;
vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V2;
vpboundint_st = ERRCONFIG_VPBOUNDINTST_V2;
- } else {
+ break;
+ default:
dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex"
"module without specifying the ip\n", __func__);
return -EINVAL;
@@ -447,8 +465,55 @@ int sr_configure_errgen(struct voltagedomain *voltdm)
sr_errconfig);
/* Enabling the interrupts if the ERROR module is used */
- sr_modify_reg(sr, errconfig_offs,
- vpboundint_en, (vpboundint_en | vpboundint_st));
+ sr_modify_reg(sr, errconfig_offs, (vpboundint_en | vpboundint_st),
+ vpboundint_en);
+
+ return 0;
+}
+
+/**
+ * sr_disable_errgen() - Disables SmartReflex AVS module's errgen component
+ * @voltdm: VDD pointer to which the SR module to be configured belongs to.
+ *
+ * This API is to be called from the smartreflex class driver to
+ * disable the error generator module inside the smartreflex module.
+ *
+ * Returns 0 on success and error value in case of failure.
+ */
+int sr_disable_errgen(struct voltagedomain *voltdm)
+{
+ u32 errconfig_offs;
+ u32 vpboundint_en, vpboundint_st;
+ struct omap_sr *sr = _sr_lookup(voltdm);
+
+ if (IS_ERR(sr)) {
+ pr_warning("%s: omap_sr struct for sr_%s not found\n",
+ __func__, voltdm->name);
+ return PTR_ERR(sr);
+ }
+
+ switch (sr->ip_type) {
+ case SR_TYPE_V1:
+ errconfig_offs = ERRCONFIG_V1;
+ vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V1;
+ vpboundint_st = ERRCONFIG_VPBOUNDINTST_V1;
+ break;
+ case SR_TYPE_V2:
+ errconfig_offs = ERRCONFIG_V2;
+ vpboundint_en = ERRCONFIG_VPBOUNDINTEN_V2;
+ vpboundint_st = ERRCONFIG_VPBOUNDINTST_V2;
+ break;
+ default:
+ dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex"
+ "module without specifying the ip\n", __func__);
+ return -EINVAL;
+ }
+
+ /* Disable the interrupts of ERROR module */
+ sr_modify_reg(sr, errconfig_offs, vpboundint_en | vpboundint_st, 0);
+
+ /* Disable the Sensor and errorgen */
+ sr_modify_reg(sr, SRCONFIG, SRCONFIG_SENENABLE | SRCONFIG_ERRGEN_EN, 0);
return 0;
}
@@ -475,7 +540,7 @@ int sr_configure_minmax(struct voltagedomain *voltdm)
if (IS_ERR(sr)) {
pr_warning("%s: omap_sr struct for sr_%s not found\n",
__func__, voltdm->name);
- return -EINVAL;
+ return PTR_ERR(sr);
}
if (!sr->clk_length)
@@ -488,14 +553,17 @@ int sr_configure_minmax(struct voltagedomain *voltdm)
SRCONFIG_SENENABLE |
(sr->accum_data << SRCONFIG_ACCUMDATA_SHIFT);
- if (sr->ip_type == SR_TYPE_V1) {
+ switch (sr->ip_type) {
+ case SR_TYPE_V1:
sr_config |= SRCONFIG_DELAYCTRL;
senn_shift = SRCONFIG_SENNENABLE_V1_SHIFT;
senp_shift = SRCONFIG_SENPENABLE_V1_SHIFT;
- } else if (sr->ip_type == SR_TYPE_V2) {
+ break;
+ case SR_TYPE_V2:
senn_shift = SRCONFIG_SENNENABLE_V2_SHIFT;
senp_shift = SRCONFIG_SENPENABLE_V2_SHIFT;
- } else {
+ break;
+ default:
dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex"
"module without specifying the ip\n", __func__);
return -EINVAL;
@@ -511,20 +579,27 @@ int sr_configure_minmax(struct voltagedomain *voltdm)
* Enabling the interrupts if MINMAXAVG module is used.
* TODO: check if all the interrupts are mandatory
*/
- if (sr->ip_type == SR_TYPE_V1) {
+ switch (sr->ip_type) {
+ case SR_TYPE_V1:
sr_modify_reg(sr, ERRCONFIG_V1,
(ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUVALIDINTEN |
ERRCONFIG_MCUBOUNDINTEN),
(ERRCONFIG_MCUACCUMINTEN | ERRCONFIG_MCUACCUMINTST |
ERRCONFIG_MCUVALIDINTEN | ERRCONFIG_MCUVALIDINTST |
ERRCONFIG_MCUBOUNDINTEN | ERRCONFIG_MCUBOUNDINTST));
- } else if (sr->ip_type == SR_TYPE_V2) {
+ break;
+ case SR_TYPE_V2:
sr_write_reg(sr, IRQSTATUS,
IRQSTATUS_MCUACCUMINT | IRQSTATUS_MCVALIDINT |
IRQSTATUS_MCBOUNDSINT | IRQSTATUS_MCUDISABLEACKINT);
sr_write_reg(sr, IRQENABLE_SET,
IRQENABLE_MCUACCUMINT | IRQENABLE_MCUVALIDINT |
IRQENABLE_MCUBOUNDSINT | IRQENABLE_MCUDISABLEACKINT);
+ break;
+ default:
+ dev_err(&sr->pdev->dev, "%s: Trying to Configure smartreflex"
+ "module without specifying the ip\n", __func__);
+ return -EINVAL;
}
return 0;
@@ -543,15 +618,15 @@ int sr_configure_minmax(struct voltagedomain *voltdm)
*/
int sr_enable(struct voltagedomain *voltdm, unsigned long volt)
{
- u32 nvalue_reciprocal;
struct omap_volt_data *volt_data;
struct omap_sr *sr = _sr_lookup(voltdm);
+ u32 nvalue_reciprocal;
int ret;
if (IS_ERR(sr)) {
pr_warning("%s: omap_sr struct for sr_%s not found\n",
__func__, voltdm->name);
- return -EINVAL;
+ return PTR_ERR(sr);
}
volt_data = omap_voltage_get_voltdata(sr->voltdm, volt);
@@ -559,7 +634,7 @@ int sr_enable(struct voltagedomain *voltdm, unsigned long volt)
if (IS_ERR(volt_data)) {
dev_warn(&sr->pdev->dev, "%s: Unable to get voltage table"
"for nominal voltage %ld\n", __func__, volt);
- return -ENODATA;
+ return PTR_ERR(volt_data);
}
nvalue_reciprocal = sr_retrieve_nvalue(sr, volt_data->sr_efuse_offs);
@@ -617,10 +692,17 @@ void sr_disable(struct voltagedomain *voltdm)
* disable the clocks.
*/
if (sr_read_reg(sr, SRCONFIG) & SRCONFIG_SRENABLE) {
- if (sr->ip_type == SR_TYPE_V1)
+ switch (sr->ip_type) {
+ case SR_TYPE_V1:
sr_v1_disable(sr);
- else if (sr->ip_type == SR_TYPE_V2)
+ break;
+ case SR_TYPE_V2:
sr_v2_disable(sr);
+ break;
+ default:
+ dev_err(&sr->pdev->dev, "UNKNOWN IP type %d\n",
+ sr->ip_type);
+ }
}
pm_runtime_put_sync_suspend(&sr->pdev->dev);
@@ -779,10 +861,10 @@ void omap_sr_register_pmic(struct omap_sr_pmic_data *pmic_data)
sr_pmic_data = pmic_data;
}
-/* PM Debug Fs enteries to enable disable smartreflex. */
+/* PM Debug FS entries to enable and disable smartreflex. */
static int omap_sr_autocomp_show(void *data, u64 *val)
{
- struct omap_sr *sr_info = (struct omap_sr *) data;
+ struct omap_sr *sr_info = data;
if (!sr_info) {
pr_warning("%s: omap_sr struct not found\n", __func__);
@@ -796,7 +878,7 @@ static int omap_sr_autocomp_show(void *data, u64 *val)
static int omap_sr_autocomp_store(void *data, u64 val)
{
- struct omap_sr *sr_info = (struct omap_sr *) data;
+ struct omap_sr *sr_info = data;
if (!sr_info) {
pr_warning("%s: omap_sr struct not found\n", __func__);
@@ -804,7 +886,7 @@ static int omap_sr_autocomp_store(void *data, u64 val)
}
/* Sanity check */
- if (val && (val != 1)) {
+ if (val > 1) {
pr_warning("%s: Invalid argument %lld\n", __func__, val);
return -EINVAL;
}
@@ -821,11 +903,11 @@ static int omap_sr_autocomp_store(void *data, u64 val)
}
DEFINE_SIMPLE_ATTRIBUTE(pm_sr_fops, omap_sr_autocomp_show,
- omap_sr_autocomp_store, "%llu\n");
+ omap_sr_autocomp_store, "%llu\n");
static int __init omap_sr_probe(struct platform_device *pdev)
{
- struct omap_sr *sr_info = kzalloc(sizeof(struct omap_sr), GFP_KERNEL);
+ struct omap_sr *sr_info;
struct omap_sr_data *pdata = pdev->dev.platform_data;
struct resource *mem, *irq;
struct dentry *nvalue_dir;
@@ -833,12 +915,15 @@ static int __init omap_sr_probe(struct platform_device *pdev)
int i, ret = 0;
char *name;
+ sr_info = kzalloc(sizeof(struct omap_sr), GFP_KERNEL);
if (!sr_info) {
dev_err(&pdev->dev, "%s: unable to allocate sr_info\n",
__func__);
return -ENOMEM;
}
+ platform_set_drvdata(pdev, sr_info);
+
if (!pdata) {
dev_err(&pdev->dev, "%s: platform data missing\n", __func__);
ret = -EINVAL;
@@ -897,14 +982,14 @@ static int __init omap_sr_probe(struct platform_device *pdev)
ret = sr_late_init(sr_info);
if (ret) {
pr_warning("%s: Error in SR late init\n", __func__);
- return ret;
+ goto err_iounmap;
}
}
dev_info(&pdev->dev, "%s: SmartReflex driver initialized\n", __func__);
if (!sr_dbg_dir) {
sr_dbg_dir = debugfs_create_dir("smartreflex", NULL);
- if (!sr_dbg_dir) {
+ if (IS_ERR_OR_NULL(sr_dbg_dir)) {
ret = PTR_ERR(sr_dbg_dir);
pr_err("%s:sr debugfs dir creation failed(%d)\n",
__func__, ret);
@@ -921,7 +1006,7 @@ static int __init omap_sr_probe(struct platform_device *pdev)
}
sr_info->dbg_dir = debugfs_create_dir(name, sr_dbg_dir);
kfree(name);
- if (IS_ERR(sr_info->dbg_dir)) {
+ if (IS_ERR_OR_NULL(sr_info->dbg_dir)) {
dev_err(&pdev->dev, "%s: Unable to create debugfs directory\n",
__func__);
ret = PTR_ERR(sr_info->dbg_dir);
@@ -938,7 +1023,7 @@ static int __init omap_sr_probe(struct platform_device *pdev)
&sr_info->err_minlimit);
nvalue_dir = debugfs_create_dir("nvalue", sr_info->dbg_dir);
- if (IS_ERR(nvalue_dir)) {
+ if (IS_ERR_OR_NULL(nvalue_dir)) {
dev_err(&pdev->dev, "%s: Unable to create debugfs directory"
"for n-values\n", __func__);
ret = PTR_ERR(nvalue_dir);
@@ -994,7 +1079,7 @@ static int __devexit omap_sr_remove(struct platform_device *pdev)
if (IS_ERR(sr_info)) {
dev_warn(&pdev->dev, "%s: omap_sr struct not found\n",
__func__);
- return -EINVAL;
+ return PTR_ERR(sr_info);
}
if (sr_info->autocomp_active)
@@ -1011,8 +1096,32 @@ static int __devexit omap_sr_remove(struct platform_device *pdev)
return 0;
}
+static void __devexit omap_sr_shutdown(struct platform_device *pdev)
+{
+ struct omap_sr_data *pdata = pdev->dev.platform_data;
+ struct omap_sr *sr_info;
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "%s: platform data missing\n", __func__);
+ return;
+ }
+
+ sr_info = _sr_lookup(pdata->voltdm);
+ if (IS_ERR(sr_info)) {
+ dev_warn(&pdev->dev, "%s: omap_sr struct not found\n",
+ __func__);
+ return;
+ }
+
+ if (sr_info->autocomp_active)
+ sr_stop_vddautocomp(sr_info);
+
+ return;
+}
+
static struct platform_driver smartreflex_driver = {
- .remove = omap_sr_remove,
+ .remove = __devexit_p(omap_sr_remove),
+ .shutdown = __devexit_p(omap_sr_shutdown),
.driver = {
.name = "smartreflex",
},
@@ -1042,12 +1151,12 @@ static int __init sr_init(void)
return 0;
}
+late_initcall(sr_init);
static void __exit sr_exit(void)
{
platform_driver_unregister(&smartreflex_driver);
}
-late_initcall(sr_init);
module_exit(sr_exit);
MODULE_DESCRIPTION("OMAP Smartreflex Driver");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.