From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Herbrechtsmeier Date: Fri, 25 Nov 2016 14:59:54 +0100 Subject: [U-Boot] [PATCH v2 4/4] mmc: zynq: Add fdt max-frequency support In-Reply-To: <1480082395-14750-1-git-send-email-stefan.herbrechtsmeier@weidmueller.de> References: <1480082395-14750-1-git-send-email-stefan.herbrechtsmeier@weidmueller.de> Message-ID: <1480082395-14750-5-git-send-email-stefan.herbrechtsmeier@weidmueller.de> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de 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 --- Changes in v2: None drivers/mmc/zynq_sdhci.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/zynq_sdhci.c b/drivers/mmc/zynq_sdhci.c index 26bd1be..4d2f0b5 100644 --- a/drivers/mmc/zynq_sdhci.c +++ b/drivers/mmc/zynq_sdhci.c @@ -16,6 +16,8 @@ #include +DECLARE_GLOBAL_DATA_PTR; + #ifndef CONFIG_ZYNQ_SDHCI_MIN_FREQ # define CONFIG_ZYNQ_SDHCI_MIN_FREQ 0 #endif @@ -23,6 +25,7 @@ struct arasan_sdhci_plat { struct mmc_config cfg; struct mmc mmc; + unsigned int f_max; }; static int arasan_sdhci_probe(struct udevice *dev) @@ -67,7 +70,7 @@ 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) @@ -81,11 +84,15 @@ 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; } -- 2.7.4 Kommanditgesellschaft - Sitz: Detmold - Amtsgericht Lemgo HRA 2790 - Komplement?rin: Weidm?ller Interface F?hrungsgesellschaft mbH - Sitz: Detmold - Amtsgericht Lemgo HRB 3924; Gesch?ftsf?hrer: Jos? Carlos ?lvarez Tobar, Elke Eckstein, Dr. Peter K?hler, J?rg Timmermann; USt-ID-Nr. DE124599660