regmap: Updates for v4.17
This is a fairly large set of updates for regmap, mainly bugfixes. The biggest bit of this is some fixes for the bulk operations code which had issues in some use cases, Charles Keepax has sorted them out. We also gained the ability to use debugfs with syscon regmaps and to specify the clock to be used with MMIO regmaps. -----BEGIN PGP SIGNATURE----- iQFHBAABCgAxFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAlrCVS8THGJyb29uaWVA a2VybmVsLm9yZwAKCRAk1otyXVSH0I8DCACDPubZk2MzaXHIa/jCNAtJty+lEYuK X7Q/dOqrUxOoLcpMQNH8cHc9UtQ01xrthOkcOIOwVandOf6VHea7NpNzqZIZwCh9 K5kqpHMOs2Gmx39Kg3ng4lNmzDf/XUeheI8qPDyqAKb9fFQjD+F3bOVsiU7a3VOh oCGk81fdLEb5Xp2qKaIM3viZ7AemEJABRdKrIs/hghNv4DaHV2auIh8FJ9WFzGwK s+JAP2RIX9N6HR4mmnDUtfavEDQwrDXN3IDxDjxkgo2CT62e5D1wZ9ixUWM+q1RA 74n3Mc5ZoMxAssNiuEOPRLWTbsPpGtJhKcN0QbUdViM8UMKwHSRvpFAS =CqUP -----END PGP SIGNATURE----- Merge tag 'regmap-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap Pull regmap updates from Mark Brown: "This is a fairly large set of updates for regmap, mainly bugfixes. The biggest bit of this is some fixes for the bulk operations code which had issues in some use cases, Charles Keepax has sorted them out. We also gained the ability to use debugfs with syscon regmaps and to specify the clock to be used with MMIO regmaps" * tag 'regmap-v4.17' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: (21 commits) regmap: debugfs: Improve warning message on debugfs_create_dir() failure regmap: debugfs: Free map->debugfs_name when debugfs_create_dir() failed regmap: debugfs: Don't leak dummy names regmap: debugfs: Disambiguate dummy debugfs file name regmap: mmio: Add function to attach a clock regmap: Merge redundant handling in regmap_bulk_write regmap: Tidy up regmap_raw_write chunking code regmap: Move the handling for max_raw_write into regmap_raw_write regmap: Remove unnecessary printk for failed allocation regmap: Format data for raw write in regmap_bulk_write regmap: use debugfs even when no device regmap: Allow missing device in regmap_name_read_file() regmap: Use _regmap_read in regmap_bulk_read regmap: Tidy up regmap_raw_read chunking code regmap: Move the handling for max_raw_read into regmap_raw_read regmap: Use helper function for register offset regmap: Don't use format_val in regmap_bulk_read regmap: Correct comparison in regmap_cached regmap: Correct offset handling in regmap_volatile_range regmap-i2c: Off by one in regmap_i2c_smbus_i2c_read/write() ...
This commit is contained in:
Linus Torvalds
Коммит
ffd776bf56
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@ -25,6 +25,7 @@ struct regmap_debugfs_node {
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struct list_head link;
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};
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static unsigned int dummy_index;
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static struct dentry *regmap_debugfs_root;
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static LIST_HEAD(regmap_debugfs_early_list);
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static DEFINE_MUTEX(regmap_debugfs_early_lock);
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@ -40,6 +41,7 @@ static ssize_t regmap_name_read_file(struct file *file,
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loff_t *ppos)
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{
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struct regmap *map = file->private_data;
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const char *name = "nodev";
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int ret;
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char *buf;
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@ -47,7 +49,10 @@ static ssize_t regmap_name_read_file(struct file *file,
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if (!buf)
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return -ENOMEM;
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ret = snprintf(buf, PAGE_SIZE, "%s\n", map->dev->driver->name);
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if (map->dev && map->dev->driver)
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name = map->dev->driver->name;
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ret = snprintf(buf, PAGE_SIZE, "%s\n", name);
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if (ret < 0) {
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kfree(buf);
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return ret;
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@ -569,9 +574,20 @@ void regmap_debugfs_init(struct regmap *map, const char *name)
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name = devname;
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}
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if (!strcmp(name, "dummy")) {
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map->debugfs_name = kasprintf(GFP_KERNEL, "dummy%d",
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dummy_index);
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name = map->debugfs_name;
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dummy_index++;
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}
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map->debugfs = debugfs_create_dir(name, regmap_debugfs_root);
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if (!map->debugfs) {
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dev_warn(map->dev, "Failed to create debugfs directory\n");
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dev_warn(map->dev,
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"Failed to create %s debugfs directory\n", name);
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kfree(map->debugfs_name);
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map->debugfs_name = NULL;
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return;
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}
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@ -217,8 +217,6 @@ static int regmap_i2c_smbus_i2c_write(void *context, const void *data,
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if (count < 1)
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return -EINVAL;
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if (count >= I2C_SMBUS_BLOCK_MAX)
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return -E2BIG;
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--count;
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return i2c_smbus_write_i2c_block_data(i2c, ((u8 *)data)[0], count,
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@ -235,8 +233,6 @@ static int regmap_i2c_smbus_i2c_read(void *context, const void *reg,
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if (reg_size != 1 || val_size < 1)
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return -EINVAL;
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if (val_size >= I2C_SMBUS_BLOCK_MAX)
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return -E2BIG;
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ret = i2c_smbus_read_i2c_block_data(i2c, ((u8 *)reg)[0], val_size, val);
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if (ret == val_size)
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@ -28,6 +28,8 @@
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struct regmap_mmio_context {
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void __iomem *regs;
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unsigned val_bytes;
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bool attached_clk;
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struct clk *clk;
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void (*reg_write)(struct regmap_mmio_context *ctx,
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@ -363,4 +365,26 @@ struct regmap *__devm_regmap_init_mmio_clk(struct device *dev,
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}
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EXPORT_SYMBOL_GPL(__devm_regmap_init_mmio_clk);
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int regmap_mmio_attach_clk(struct regmap *map, struct clk *clk)
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{
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struct regmap_mmio_context *ctx = map->bus_context;
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ctx->clk = clk;
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ctx->attached_clk = true;
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return clk_prepare(ctx->clk);
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}
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EXPORT_SYMBOL_GPL(regmap_mmio_attach_clk);
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void regmap_mmio_detach_clk(struct regmap *map)
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{
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struct regmap_mmio_context *ctx = map->bus_context;
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clk_unprepare(ctx->clk);
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ctx->attached_clk = false;
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ctx->clk = NULL;
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}
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EXPORT_SYMBOL_GPL(regmap_mmio_detach_clk);
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MODULE_LICENSE("GPL v2");
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@ -99,7 +99,7 @@ bool regmap_cached(struct regmap *map, unsigned int reg)
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int ret;
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unsigned int val;
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if (map->cache == REGCACHE_NONE)
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if (map->cache_type == REGCACHE_NONE)
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return false;
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if (!map->cache_ops)
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@ -174,7 +174,7 @@ static bool regmap_volatile_range(struct regmap *map, unsigned int reg,
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unsigned int i;
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for (i = 0; i < num; i++)
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if (!regmap_volatile(map, reg + i))
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if (!regmap_volatile(map, reg + regmap_get_offset(map, i)))
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return false;
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return true;
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@ -1116,6 +1116,8 @@ skip_format_initialization:
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ret = regmap_attach_dev(dev, map, config);
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if (ret != 0)
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goto err_regcache;
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} else {
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regmap_debugfs_init(map, config->name);
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}
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return map;
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@ -1438,7 +1440,7 @@ static void regmap_set_work_buf_flag_mask(struct regmap *map, int max_bytes,
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buf[i] |= (mask >> (8 * i)) & 0xff;
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}
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int _regmap_raw_write(struct regmap *map, unsigned int reg,
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static int _regmap_raw_write_impl(struct regmap *map, unsigned int reg,
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const void *val, size_t val_len)
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{
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struct regmap_range_node *range;
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@ -1490,7 +1492,8 @@ int _regmap_raw_write(struct regmap *map, unsigned int reg,
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while (val_num > win_residue) {
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dev_dbg(map->dev, "Writing window %d/%zu\n",
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win_residue, val_len / map->format.val_bytes);
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ret = _regmap_raw_write(map, reg, val, win_residue *
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ret = _regmap_raw_write_impl(map, reg, val,
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win_residue *
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map->format.val_bytes);
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if (ret != 0)
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return ret;
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@ -1707,7 +1710,7 @@ static int _regmap_bus_raw_write(void *context, unsigned int reg,
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map->format.format_val(map->work_buf + map->format.reg_bytes
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+ map->format.pad_bytes, val, 0);
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return _regmap_raw_write(map, reg,
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return _regmap_raw_write_impl(map, reg,
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map->work_buf +
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map->format.reg_bytes +
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map->format.pad_bytes,
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@ -1806,6 +1809,44 @@ int regmap_write_async(struct regmap *map, unsigned int reg, unsigned int val)
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}
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EXPORT_SYMBOL_GPL(regmap_write_async);
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int _regmap_raw_write(struct regmap *map, unsigned int reg,
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const void *val, size_t val_len)
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{
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size_t val_bytes = map->format.val_bytes;
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size_t val_count = val_len / val_bytes;
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size_t chunk_count, chunk_bytes;
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size_t chunk_regs = val_count;
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int ret, i;
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if (!val_count)
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return -EINVAL;
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if (map->use_single_write)
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chunk_regs = 1;
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else if (map->max_raw_write && val_len > map->max_raw_write)
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chunk_regs = map->max_raw_write / val_bytes;
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chunk_count = val_count / chunk_regs;
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chunk_bytes = chunk_regs * val_bytes;
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/* Write as many bytes as possible with chunk_size */
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for (i = 0; i < chunk_count; i++) {
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ret = _regmap_raw_write_impl(map, reg, val, chunk_bytes);
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if (ret)
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return ret;
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reg += regmap_get_offset(map, chunk_regs);
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val += chunk_bytes;
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val_len -= chunk_bytes;
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}
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/* Write remaining bytes */
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if (val_len)
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ret = _regmap_raw_write_impl(map, reg, val, val_len);
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return ret;
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}
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/**
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* regmap_raw_write() - Write raw values to one or more registers
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*
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@ -1831,8 +1872,6 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
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return -EINVAL;
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if (val_len % map->format.val_bytes)
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return -EINVAL;
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if (map->max_raw_write && map->max_raw_write > val_len)
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return -E2BIG;
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map->lock(map->lock_arg);
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@ -1923,23 +1962,15 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
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{
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int ret = 0, i;
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size_t val_bytes = map->format.val_bytes;
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size_t total_size = val_bytes * val_count;
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if (!IS_ALIGNED(reg, map->reg_stride))
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return -EINVAL;
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/*
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* Some devices don't support bulk write, for
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* them we have a series of single write operations in the first two if
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* blocks.
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*
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* The first if block is used for memory mapped io. It does not allow
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* val_bytes of 3 for example.
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* The second one is for busses that do not provide raw I/O.
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* The third one is used for busses which do not have these limitations
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* and can write arbitrary value lengths.
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* Some devices don't support bulk write, for them we have a series of
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* single write operations.
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*/
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if (!map->bus) {
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if (!map->bus || !map->format.parse_inplace) {
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map->lock(map->lock_arg);
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for (i = 0; i < val_count; i++) {
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unsigned int ival;
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@ -1972,81 +2003,17 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
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}
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out:
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map->unlock(map->lock_arg);
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} else if (map->bus && !map->format.parse_inplace) {
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const u8 *u8 = val;
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const u16 *u16 = val;
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const u32 *u32 = val;
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unsigned int ival;
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for (i = 0; i < val_count; i++) {
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switch (map->format.val_bytes) {
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case 4:
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ival = u32[i];
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break;
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case 2:
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ival = u16[i];
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break;
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case 1:
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ival = u8[i];
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break;
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default:
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return -EINVAL;
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}
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ret = regmap_write(map, reg + (i * map->reg_stride),
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ival);
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if (ret)
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return ret;
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}
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} else if (map->use_single_write ||
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(map->max_raw_write && map->max_raw_write < total_size)) {
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int chunk_stride = map->reg_stride;
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size_t chunk_size = val_bytes;
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size_t chunk_count = val_count;
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if (!map->use_single_write) {
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chunk_size = map->max_raw_write;
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if (chunk_size % val_bytes)
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chunk_size -= chunk_size % val_bytes;
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chunk_count = total_size / chunk_size;
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chunk_stride *= chunk_size / val_bytes;
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}
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map->lock(map->lock_arg);
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/* Write as many bytes as possible with chunk_size */
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for (i = 0; i < chunk_count; i++) {
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ret = _regmap_raw_write(map,
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reg + (i * chunk_stride),
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val + (i * chunk_size),
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chunk_size);
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if (ret)
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break;
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}
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/* Write remaining bytes */
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if (!ret && chunk_size * i < total_size) {
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ret = _regmap_raw_write(map, reg + (i * chunk_stride),
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val + (i * chunk_size),
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total_size - i * chunk_size);
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||||
}
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map->unlock(map->lock_arg);
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} else {
|
||||
void *wval;
|
||||
|
||||
if (!val_count)
|
||||
return -EINVAL;
|
||||
|
||||
wval = kmemdup(val, val_count * val_bytes, map->alloc_flags);
|
||||
if (!wval) {
|
||||
dev_err(map->dev, "Error in memory allocation\n");
|
||||
if (!wval)
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
for (i = 0; i < val_count * val_bytes; i += val_bytes)
|
||||
map->format.parse_inplace(wval + i);
|
||||
|
||||
map->lock(map->lock_arg);
|
||||
ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count);
|
||||
map->unlock(map->lock_arg);
|
||||
ret = regmap_raw_write(map, reg, wval, val_bytes * val_count);
|
||||
|
||||
kfree(wval);
|
||||
}
|
||||
|
|
@ -2542,18 +2509,39 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
|
|||
|
||||
if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass ||
|
||||
map->cache_type == REGCACHE_NONE) {
|
||||
size_t chunk_count, chunk_bytes;
|
||||
size_t chunk_regs = val_count;
|
||||
|
||||
if (!map->bus->read) {
|
||||
ret = -ENOTSUPP;
|
||||
goto out;
|
||||
}
|
||||
if (map->max_raw_read && map->max_raw_read < val_len) {
|
||||
ret = -E2BIG;
|
||||
|
||||
if (map->use_single_read)
|
||||
chunk_regs = 1;
|
||||
else if (map->max_raw_read && val_len > map->max_raw_read)
|
||||
chunk_regs = map->max_raw_read / val_bytes;
|
||||
|
||||
chunk_count = val_count / chunk_regs;
|
||||
chunk_bytes = chunk_regs * val_bytes;
|
||||
|
||||
/* Read bytes that fit into whole chunks */
|
||||
for (i = 0; i < chunk_count; i++) {
|
||||
ret = _regmap_raw_read(map, reg, val, chunk_bytes);
|
||||
if (ret != 0)
|
||||
goto out;
|
||||
|
||||
reg += regmap_get_offset(map, chunk_regs);
|
||||
val += chunk_bytes;
|
||||
val_len -= chunk_bytes;
|
||||
}
|
||||
|
||||
/* Physical block read if there's no cache involved */
|
||||
/* Read remaining bytes */
|
||||
if (val_len) {
|
||||
ret = _regmap_raw_read(map, reg, val, val_len);
|
||||
|
||||
if (ret != 0)
|
||||
goto out;
|
||||
}
|
||||
} else {
|
||||
/* Otherwise go word by word for the cache; should be low
|
||||
* cost as we expect to hit the cache.
|
||||
|
|
@ -2653,78 +2641,17 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
|
|||
|
||||
if (!IS_ALIGNED(reg, map->reg_stride))
|
||||
return -EINVAL;
|
||||
if (val_count == 0)
|
||||
return -EINVAL;
|
||||
|
||||
if (map->bus && map->format.parse_inplace && (vol || map->cache_type == REGCACHE_NONE)) {
|
||||
/*
|
||||
* Some devices does not support bulk read, for
|
||||
* them we have a series of single read operations.
|
||||
*/
|
||||
size_t total_size = val_bytes * val_count;
|
||||
|
||||
if (!map->use_single_read &&
|
||||
(!map->max_raw_read || map->max_raw_read > total_size)) {
|
||||
ret = regmap_raw_read(map, reg, val,
|
||||
val_bytes * val_count);
|
||||
ret = regmap_raw_read(map, reg, val, val_bytes * val_count);
|
||||
if (ret != 0)
|
||||
return ret;
|
||||
} else {
|
||||
/*
|
||||
* Some devices do not support bulk read or do not
|
||||
* support large bulk reads, for them we have a series
|
||||
* of read operations.
|
||||
*/
|
||||
int chunk_stride = map->reg_stride;
|
||||
size_t chunk_size = val_bytes;
|
||||
size_t chunk_count = val_count;
|
||||
|
||||
if (!map->use_single_read) {
|
||||
chunk_size = map->max_raw_read;
|
||||
if (chunk_size % val_bytes)
|
||||
chunk_size -= chunk_size % val_bytes;
|
||||
chunk_count = total_size / chunk_size;
|
||||
chunk_stride *= chunk_size / val_bytes;
|
||||
}
|
||||
|
||||
/* Read bytes that fit into a multiple of chunk_size */
|
||||
for (i = 0; i < chunk_count; i++) {
|
||||
ret = regmap_raw_read(map,
|
||||
reg + (i * chunk_stride),
|
||||
val + (i * chunk_size),
|
||||
chunk_size);
|
||||
if (ret != 0)
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* Read remaining bytes */
|
||||
if (chunk_size * i < total_size) {
|
||||
ret = regmap_raw_read(map,
|
||||
reg + (i * chunk_stride),
|
||||
val + (i * chunk_size),
|
||||
total_size - i * chunk_size);
|
||||
if (ret != 0)
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
for (i = 0; i < val_count * val_bytes; i += val_bytes)
|
||||
map->format.parse_inplace(val + i);
|
||||
} else {
|
||||
for (i = 0; i < val_count; i++) {
|
||||
unsigned int ival;
|
||||
ret = regmap_read(map, reg + regmap_get_offset(map, i),
|
||||
&ival);
|
||||
if (ret != 0)
|
||||
return ret;
|
||||
|
||||
if (map->format.format_val) {
|
||||
map->format.format_val(val + (i * val_bytes), ival, 0);
|
||||
} else {
|
||||
/* Devices providing read and write
|
||||
* operations can use the bulk I/O
|
||||
* functions if they define a val_bytes,
|
||||
* we assume that the values are native
|
||||
* endian.
|
||||
*/
|
||||
#ifdef CONFIG_64BIT
|
||||
u64 *u64 = val;
|
||||
#endif
|
||||
|
|
@ -2732,6 +2659,16 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
|
|||
u16 *u16 = val;
|
||||
u8 *u8 = val;
|
||||
|
||||
map->lock(map->lock_arg);
|
||||
|
||||
for (i = 0; i < val_count; i++) {
|
||||
unsigned int ival;
|
||||
|
||||
ret = _regmap_read(map, reg + regmap_get_offset(map, i),
|
||||
&ival);
|
||||
if (ret != 0)
|
||||
goto out;
|
||||
|
||||
switch (map->format.val_bytes) {
|
||||
#ifdef CONFIG_64BIT
|
||||
case 8:
|
||||
|
|
@ -2748,13 +2685,16 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
|
|||
u8[i] = ival;
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
ret = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
out:
|
||||
map->unlock(map->lock_arg);
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(regmap_bulk_read);
|
||||
|
||||
|
|
|
|||
|
|
@ -21,6 +21,7 @@
|
|||
#include <linux/lockdep.h>
|
||||
|
||||
struct module;
|
||||
struct clk;
|
||||
struct device;
|
||||
struct i2c_client;
|
||||
struct irq_domain;
|
||||
|
|
@ -905,6 +906,8 @@ bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg);
|
|||
__regmap_lockdep_wrapper(__devm_regmap_init_sdw, #config, \
|
||||
sdw, config)
|
||||
|
||||
int regmap_mmio_attach_clk(struct regmap *map, struct clk *clk);
|
||||
void regmap_mmio_detach_clk(struct regmap *map);
|
||||
void regmap_exit(struct regmap *map);
|
||||
int regmap_reinit_cache(struct regmap *map,
|
||||
const struct regmap_config *config);
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче