From 3561afa02605b398d1b98e1ce913ea6411cdc5dd Mon Sep 17 00:00:00 2001 From: Andrew Jeffery Date: Thu, 14 Jan 2021 13:44:28 +1030 Subject: 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 Link: https://lore.kernel.org/r/20210114031433.2388532-2-andrew@aj.id.au Signed-off-by: Ulf Hansson --- include/linux/mmc/host.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'include/linux/mmc') 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); -- cgit