From 066d16c3e8194677a9aaeb06a45e4014387d16f1 Mon Sep 17 00:00:00 2001 From: Dimitris Papastamos Date: Thu, 13 Jan 2011 12:20:36 +0000 Subject: ASoC: soc-cache: Add support for default readable()/volatile() functions For common scenarios, device drivers can provide a table of all the registers that are at least either readable/writable/volatile. The idea is that if a register lookup fails, all of its read/write/vol members will be zero and will be treated as default. This also reduces the size of the register access array. Signed-off-by: Dimitris Papastamos Acked-by: Liam Girdwood Signed-off-by: Mark Brown --- include/sound/soc.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'include') diff --git a/include/sound/soc.h b/include/sound/soc.h index d609232da82..b8acf99ac89 100644 --- a/include/sound/soc.h +++ b/include/sound/soc.h @@ -276,6 +276,10 @@ int snd_soc_cache_write(struct snd_soc_codec *codec, unsigned int reg, unsigned int value); int snd_soc_cache_read(struct snd_soc_codec *codec, unsigned int reg, unsigned int *value); +int snd_soc_default_volatile_register(struct snd_soc_codec *codec, + unsigned int reg); +int snd_soc_default_readable_register(struct snd_soc_codec *codec, + unsigned int reg); /* Utility functions to get clock rates from various things */ int snd_soc_calc_frame_size(int sample_size, int channels, int tdm_slots); @@ -366,6 +370,22 @@ int snd_soc_get_volsw_2r_sx(struct snd_kcontrol *kcontrol, int snd_soc_put_volsw_2r_sx(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol); +/** + * struct snd_soc_reg_access - Describes whether a given register is + * readable, writable or volatile. + * + * @reg: the register number + * @read: whether this register is readable + * @write: whether this register is writable + * @vol: whether this register is volatile + */ +struct snd_soc_reg_access { + u16 reg; + u16 read; + u16 write; + u16 vol; +}; + /** * struct snd_soc_jack_pin - Describes a pin to update based on jack detection * @@ -515,6 +535,8 @@ struct snd_soc_codec_driver { short reg_cache_step; short reg_word_size; const void *reg_cache_default; + short reg_access_size; + const struct snd_soc_reg_access *reg_access_default; enum snd_soc_compress_type compress_type; /* codec bias level */ -- cgit v1.2.3