diff options
| author | Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com> | 2017-01-17 16:27:33 +0100 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2017-02-17 10:22:47 +0100 |
| commit | 61e745d1311532a90de537cc470da12d306ee193 (patch) | |
| tree | cfa1dff2e0ec9f05fb5926846d4983ec84785140 /drivers | |
| parent | e0f4de1afcdb80b4ccad10a877504baaeb7ae2c0 (diff) | |
mmc: zynq: Add fdt max-frequency support
The maximum supported peripheral clock frequency of the zynq depends on
the IO routing. The MIO and EMIO support a maximum frequency of 50 MHz
respectively 25 MHz. Use the max-frequency value of the device tree to
determine the maximal supported peripheral clock frequency.
Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsmeier@weidmueller.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mmc/zynq_sdhci.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/mmc/zynq_sdhci.c b/drivers/mmc/zynq_sdhci.c index c73a4d3da0..28cedf0c46 100644 --- a/drivers/mmc/zynq_sdhci.c +++ b/drivers/mmc/zynq_sdhci.c @@ -14,6 +14,8 @@ #include <malloc.h> #include <sdhci.h> +DECLARE_GLOBAL_DATA_PTR; + #ifndef CONFIG_ZYNQ_SDHCI_MIN_FREQ # define CONFIG_ZYNQ_SDHCI_MIN_FREQ 0 #endif @@ -21,6 +23,7 @@ struct arasan_sdhci_plat { struct mmc_config cfg; struct mmc mmc; + unsigned int f_max; }; static int arasan_sdhci_probe(struct udevice *dev) @@ -60,7 +63,7 @@ static int arasan_sdhci_probe(struct udevice *dev) host->max_clk = clock; - ret = sdhci_setup_cfg(&plat->cfg, host, CONFIG_ZYNQ_SDHCI_MAX_FREQ, + ret = sdhci_setup_cfg(&plat->cfg, host, plat->f_max, CONFIG_ZYNQ_SDHCI_MIN_FREQ); host->mmc = &plat->mmc; if (ret) @@ -74,11 +77,15 @@ static int arasan_sdhci_probe(struct udevice *dev) static int arasan_sdhci_ofdata_to_platdata(struct udevice *dev) { + struct arasan_sdhci_plat *plat = dev_get_platdata(dev); struct sdhci_host *host = dev_get_priv(dev); host->name = dev->name; host->ioaddr = (void *)dev_get_addr(dev); + plat->f_max = fdtdec_get_int(gd->fdt_blob, dev->of_offset, + "max-frequency", CONFIG_ZYNQ_SDHCI_MAX_FREQ); + return 0; } |