diff options
| author | Andrew Jeffery <andrew@aj.id.au> | 2021-01-14 06:14:28 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2021-02-01 13:54:47 +0300 |
| commit | 3561afa02605b398d1b98e1ce913ea6411cdc5dd (patch) | |
| tree | 2cfabc460c4814f3be7c368db5792b2574212ce2 /include/linux/mmc | |
| parent | 7c7905df68c5ca5b3b20f41ef3f0d245ae6f32c3 (diff) | |
| download | linux-3561afa02605b398d1b98e1ce913ea6411cdc5dd.tar.xz | |
mmc: core: Add helper for parsing clock phase properties
Drivers for MMC hosts that accept phase corrections can take advantage
of the helper by embedding an instance of struct mmc_clk_phase_map in
their private data and invoking mmc_of_parse_clk_phase() to extract
phase parameters. It is the responsibility of the host driver to
translate and apply the extracted values to hardware as required.
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Link: https://lore.kernel.org/r/20210114031433.2388532-2-andrew@aj.id.au
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'include/linux/mmc')
| -rw-r--r-- | include/linux/mmc/host.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 01bba36545c5..8cf686d98a68 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -79,6 +79,17 @@ struct mmc_ios { bool enhanced_strobe; /* hs400es selection */ }; +struct mmc_clk_phase { + bool valid; + u16 in_deg; + u16 out_deg; +}; + +#define MMC_NUM_CLK_PHASES (MMC_TIMING_MMC_HS400 + 1) +struct mmc_clk_phase_map { + struct mmc_clk_phase phase[MMC_NUM_CLK_PHASES]; +}; + struct mmc_host; struct mmc_host_ops { @@ -490,6 +501,8 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *); int mmc_add_host(struct mmc_host *); void mmc_remove_host(struct mmc_host *); void mmc_free_host(struct mmc_host *); +void mmc_of_parse_clk_phase(struct mmc_host *host, + struct mmc_clk_phase_map *map); int mmc_of_parse(struct mmc_host *host); int mmc_of_parse_voltage(struct device_node *np, u32 *mask); |