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ARM: OMAP3+: SmartReflex: misc cleanups
[pandora-kernel.git] / arch / arm / mach-omap2 / smartreflex.c
diff --git a/arch/arm/mach-omap2/smartreflex.c b/arch/arm/mach-omap2/smartreflex.c
index 84d95a9..4b9dc8b 100644 (file)
--- 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 */
@@ -123,21 +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)
@@ -161,6 +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);
 
@@ -262,7 +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);
@@ -283,6 +291,7 @@ error:
                "not function as desired\n", __func__);
        kfree(name);
        kfree(sr_info);
+
        return ret;
 }
 
@@ -403,8 +412,9 @@ 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);
 
@@ -423,20 +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;
@@ -469,8 +482,8 @@ int sr_configure_errgen(struct voltagedomain *voltdm)
  */
 int sr_disable_errgen(struct voltagedomain *voltdm)
 {
-       u32 errconfig_offs, vpboundint_en;
-       u32 vpboundint_st;
+       u32 errconfig_offs;
+       u32 vpboundint_en, vpboundint_st;
        struct omap_sr *sr = _sr_lookup(voltdm);
 
        if (IS_ERR(sr)) {
@@ -479,15 +492,18 @@ int sr_disable_errgen(struct voltagedomain *voltdm)
                return -EINVAL;
        }
 
-       if (sr->ip_type == SR_TYPE_V1) {
+       switch (sr->ip_type) {
+       case SR_TYPE_V1:
                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:
                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;
@@ -537,14 +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;
@@ -560,20 +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;
@@ -592,9 +618,9 @@ 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)) {
@@ -666,10 +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);
@@ -828,10 +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__);
@@ -845,7 +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__);
@@ -870,11 +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;
@@ -882,6 +915,7 @@ 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__);
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