Merge remote-tracking branch 'regmap/topic/debugfs' into regmap-next

1 files changed, 107 insertions, 47 deletions

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 810f5094a9a8..c7465f19f674 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -519,20 +519,38 @@ struct regmap *regmap_init(struct device *dev,
         }
 
         map->range_tree = RB_ROOT;
-        for (i = 0; i < config->n_ranges; i++) {
+        for (i = 0; i < config->num_ranges; i++) {
                 const struct regmap_range_cfg *range_cfg = &config->ranges[i];
                 struct regmap_range_node *new;
 
                 /* Sanity check */
-                if (range_cfg->range_max < range_cfg->range_min ||
-                    range_cfg->range_max > map->max_register ||
-                    range_cfg->selector_reg > map->max_register ||
-                    range_cfg->window_len == 0)
+                if (range_cfg->range_max < range_cfg->range_min) {
+                        dev_err(map->dev, "Invalid range %d: %d < %d\n", i,
+                                range_cfg->range_max, range_cfg->range_min);
                         goto err_range;
+                }
+
+                if (range_cfg->range_max > map->max_register) {
+                        dev_err(map->dev, "Invalid range %d: %d > %d\n", i,
+                                range_cfg->range_max, map->max_register);
+                        goto err_range;
+                }
+
+                if (range_cfg->selector_reg > map->max_register) {
+                        dev_err(map->dev,
+                                "Invalid range %d: selector out of map\n", i);
+                        goto err_range;
+                }
+
+                if (range_cfg->window_len == 0) {
+                        dev_err(map->dev, "Invalid range %d: window_len 0\n",
+                                i);
+                        goto err_range;
+                }
 
                 /* Make sure, that this register range has no selector
                    or data window within its boundary */
-                for (j = 0; j < config->n_ranges; j++) {
+                for (j = 0; j < config->num_ranges; j++) {
                         unsigned sel_reg = config->ranges[j].selector_reg;
                         unsigned win_min = config->ranges[j].window_start;
                         unsigned win_max = win_min +
@@ -540,11 +558,17 @@ struct regmap *regmap_init(struct device *dev,
 
                         if (range_cfg->range_min <= sel_reg &&
                             sel_reg <= range_cfg->range_max) {
+                                dev_err(map->dev,
+                                        "Range %d: selector for %d in window\n",
+                                        i, j);
                                 goto err_range;
                         }
 
                         if (!(win_max < range_cfg->range_min ||
                               win_min > range_cfg->range_max)) {
+                                dev_err(map->dev,
+                                        "Range %d: window for %d in window\n",
+                                        i, j);
                                 goto err_range;
                         }
                 }
@@ -555,6 +579,8 @@ struct regmap *regmap_init(struct device *dev,
                         goto err_range;
                 }
 
+                new->map = map;
+                new->name = range_cfg->name;
                 new->range_min = range_cfg->range_min;
                 new->range_max = range_cfg->range_max;
                 new->selector_reg = range_cfg->selector_reg;
@@ -564,6 +590,7 @@ struct regmap *regmap_init(struct device *dev,
                 new->window_len = range_cfg->window_len;
 
                 if (_regmap_range_add(map, new) == false) {
+                        dev_err(map->dev, "Failed to add range %d\n", i);
                         kfree(new);
                         goto err_range;
                 }
@@ -579,7 +606,7 @@ struct regmap *regmap_init(struct device *dev,
         }
 
         ret = regcache_init(map, config);
-        if (ret < 0)
+        if (ret != 0)
                 goto err_range;
 
         regmap_debugfs_init(map, config->name);
@@ -738,59 +765,57 @@ struct regmap *dev_get_regmap(struct device *dev, const char *name)
 EXPORT_SYMBOL_GPL(dev_get_regmap);
 
 static int _regmap_select_page(struct regmap *map, unsigned int *reg,
+                               struct regmap_range_node *range,
                                unsigned int val_num)
 {
-        struct regmap_range_node *range;
         void *orig_work_buf;
         unsigned int win_offset;
         unsigned int win_page;
         bool page_chg;
         int ret;
 
-        range = _regmap_range_lookup(map, *reg);
-        if (range) {
-                win_offset = (*reg - range->range_min) % range->window_len;
-                win_page = (*reg - range->range_min) / range->window_len;
-
-                if (val_num > 1) {
-                        /* Bulk write shouldn't cross range boundary */
-                        if (*reg + val_num - 1 > range->range_max)
-                                return -EINVAL;
+        win_offset = (*reg - range->range_min) % range->window_len;
+        win_page = (*reg - range->range_min) / range->window_len;
 
-                        /* ... or single page boundary */
-                        if (val_num > range->window_len - win_offset)
-                                return -EINVAL;
-                }
+        if (val_num > 1) {
+                /* Bulk write shouldn't cross range boundary */
+                if (*reg + val_num - 1 > range->range_max)
+                        return -EINVAL;
 
-                /* It is possible to have selector register inside data window.
-                   In that case, selector register is located on every page and
-                   it needs no page switching, when accessed alone. */
-                if (val_num > 1 ||
-                    range->window_start + win_offset != range->selector_reg) {
-                        /* Use separate work_buf during page switching */
-                        orig_work_buf = map->work_buf;
-                        map->work_buf = map->selector_work_buf;
+                /* ... or single page boundary */
+                if (val_num > range->window_len - win_offset)
+                        return -EINVAL;
+        }
 
-                        ret = _regmap_update_bits(map, range->selector_reg,
-                                        range->selector_mask,
-                                        win_page << range->selector_shift,
-                                        &page_chg);
+        /* It is possible to have selector register inside data window.
+           In that case, selector register is located on every page and
+           it needs no page switching, when accessed alone. */
+        if (val_num > 1 ||
+            range->window_start + win_offset != range->selector_reg) {
+                /* Use separate work_buf during page switching */
+                orig_work_buf = map->work_buf;
+                map->work_buf = map->selector_work_buf;
 
-                        map->work_buf = orig_work_buf;
+                ret = _regmap_update_bits(map, range->selector_reg,
+                                          range->selector_mask,
+                                          win_page << range->selector_shift,
+                                          &page_chg);
 
-                        if (ret < 0)
-                                return ret;
-                }
+                map->work_buf = orig_work_buf;
 
-                *reg = range->window_start + win_offset;
+                if (ret != 0)
+                        return ret;
         }
 
+        *reg = range->window_start + win_offset;
+
         return 0;
 }
 
 static int _regmap_raw_write(struct regmap *map, unsigned int reg,
                              const void *val, size_t val_len)
 {
+        struct regmap_range_node *range;
         u8 *u8 = map->work_buf;
         void *buf;
         int ret = -ENOTSUPP;
@@ -825,9 +850,35 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg,
                 }
         }
 
-        ret = _regmap_select_page(map, &reg, val_len / map->format.val_bytes);
-        if (ret < 0)
-                return ret;
+        range = _regmap_range_lookup(map, reg);
+        if (range) {
+                int val_num = val_len / map->format.val_bytes;
+                int win_offset = (reg - range->range_min) % range->window_len;
+                int win_residue = range->window_len - win_offset;
+
+                /* If the write goes beyond the end of the window split it */
+                while (val_num > win_residue) {
+                        dev_dbg(map->dev, "Writing window %d/%zu\n",
+                                win_residue, val_len / map->format.val_bytes);
+                        ret = _regmap_raw_write(map, reg, val, win_residue *
+                                                map->format.val_bytes);
+                        if (ret != 0)
+                                return ret;
+
+                        reg += win_residue;
+                        val_num -= win_residue;
+                        val += win_residue * map->format.val_bytes;
+                        val_len -= win_residue * map->format.val_bytes;
+
+                        win_offset = (reg - range->range_min) %
+                                range->window_len;
+                        win_residue = range->window_len - win_offset;
+                }
+
+                ret = _regmap_select_page(map, &reg, range, val_num);
+                if (ret != 0)
+                        return ret;
+        }
 
         map->format.format_reg(map->work_buf, reg, map->reg_shift);
 
@@ -876,6 +927,7 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg,
 int _regmap_write(struct regmap *map, unsigned int reg,
                   unsigned int val)
 {
+        struct regmap_range_node *range;
         int ret;
         BUG_ON(!map->format.format_write && !map->format.format_val);
 
@@ -897,9 +949,12 @@ int _regmap_write(struct regmap *map, unsigned int reg,
         trace_regmap_reg_write(map->dev, reg, val);
 
         if (map->format.format_write) {
-                ret = _regmap_select_page(map, &reg, 1);
-                if (ret < 0)
-                        return ret;
+                range = _regmap_range_lookup(map, reg);
+                if (range) {
+                        ret = _regmap_select_page(map, &reg, range, 1);
+                        if (ret != 0)
+                                return ret;
+                }
 
                 map->format.format_write(map, reg, val);
 
@@ -1055,12 +1110,17 @@ EXPORT_SYMBOL_GPL(regmap_bulk_write);
 static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
                             unsigned int val_len)
 {
+        struct regmap_range_node *range;
         u8 *u8 = map->work_buf;
         int ret;
 
-        ret = _regmap_select_page(map, &reg, val_len / map->format.val_bytes);
-        if (ret < 0)
-                return ret;
+        range = _regmap_range_lookup(map, reg);
+        if (range) {
+                ret = _regmap_select_page(map, &reg, range,
+                                          val_len / map->format.val_bytes);
+                if (ret != 0)
+                        return ret;
+        }
 
         map->format.format_reg(map->work_buf, reg, map->reg_shift);