diff options
| author |   Chen-Yu Tsai <wens@csie.org> | 2019-04-13 11:32:51 +0100 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-04-25 19:43:11 +0200 |
| commit | 7fa5ad23dbb02fc9832ef303adbca06f425250d5 (patch) | |
| tree | 02a18457fb7606231e54989b9ad87ee2fbe4af40 /drivers/nvmem | |
| parent | nvmem: sunxi_sid: Optimize register read-out method (diff) | |
| download | linux-dev-7fa5ad23dbb02fc9832ef303adbca06f425250d5.tar.xz linux-dev-7fa5ad23dbb02fc9832ef303adbca06f425250d5.zip | |
nvmem: sunxi_sid: Dynamically allocate nvmem_config structure
The sunxi_sid driver currently uses a statically allocated nvmem_config
structure that is updated at probe time. This is sub-optimal as it
limits the driver to one instance, and also takes up space even if the
device is not present.
Modify the driver to allocate the nvmem_config structure at probe time,
plugging in the desired parameters along the way.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/nvmem')
| -rw-r--r-- | drivers/nvmem/sunxi_sid.c | 32 |
1 files changed, 17 insertions, 15 deletions
diff --git a/drivers/nvmem/sunxi_sid.c b/drivers/nvmem/sunxi_sid.c index 15fbfab62595..75c1f48cb3d0 100644 --- a/drivers/nvmem/sunxi_sid.c +++ b/drivers/nvmem/sunxi_sid.c @@ -35,13 +35,6 @@ #define SUN8I_SID_OP_LOCK (0xAC << 8) #define SUN8I_SID_READ BIT(1) -static struct nvmem_config econfig = { - .name = "sunxi-sid", - .read_only = true, - .stride = 4, - .word_size = 1, -}; - struct sunxi_sid_cfg { u32 value_offset; u32 size; @@ -150,6 +143,7 @@ static int sunxi_sid_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct resource *res; + struct nvmem_config *nvmem_cfg; struct nvmem_device *nvmem; struct sunxi_sid *sid; int size; @@ -172,14 +166,23 @@ static int sunxi_sid_probe(struct platform_device *pdev) size = cfg->size; - econfig.size = size; - econfig.dev = dev; + nvmem_cfg = devm_kzalloc(dev, sizeof(*nvmem_cfg), GFP_KERNEL); + if (!nvmem_cfg) + return -ENOMEM; + + nvmem_cfg->dev = dev; + nvmem_cfg->name = "sunxi-sid"; + nvmem_cfg->read_only = true; + nvmem_cfg->size = cfg->size; + nvmem_cfg->word_size = 1; + nvmem_cfg->stride = 4; + nvmem_cfg->priv = sid; if (cfg->need_register_readout) - econfig.reg_read = sun8i_sid_read_by_reg; + nvmem_cfg->reg_read = sun8i_sid_read_by_reg; else - econfig.reg_read = sunxi_sid_read; - econfig.priv = sid; - nvmem = devm_nvmem_register(dev, &econfig); + nvmem_cfg->reg_read = sunxi_sid_read; + + nvmem = devm_nvmem_register(dev, nvmem_cfg); if (IS_ERR(nvmem)) return PTR_ERR(nvmem); @@ -187,8 +190,7 @@ static int sunxi_sid_probe(struct platform_device *pdev) if (!randomness) return -ENOMEM; - econfig.reg_read(sid, 0, randomness, size); - + nvmem_cfg->reg_read(sid, 0, randomness, size); add_device_randomness(randomness, size); kfree(randomness); |