On 6 November 2017 at 12:40, Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx> wrote:
> The Socionext SynQuacer SoC inherits this IP from Fujitsu, but
> requires the F_SDH30_CMD_DAT_DELAY bit to be set in the
> F_SDH30_ESD_CONTROL control register. So set this bit if the
> DT node has the 'fujitsu,cmd-dat-delay-select' property.
>
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
> ---
> drivers/mmc/host/sdhci_f_sdh30.c | 18 +++++++++++++++++-
> 1 file changed, 17 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/sdhci_f_sdh30.c b/drivers/mmc/host/sdhci_f_sdh30.c
> index 111b66f5439b..c5bf69ef7e40 100644
> --- a/drivers/mmc/host/sdhci_f_sdh30.c
> +++ b/drivers/mmc/host/sdhci_f_sdh30.c
> @@ -13,6 +13,7 @@
> #include <linux/err.h>
> #include <linux/delay.h>
> #include <linux/module.h>
> +#include <linux/property.h>
> #include <linux/clk.h>
>
> #include "sdhci-pltfm.h"
> @@ -45,8 +46,9 @@
> struct f_sdhost_priv {
> struct clk *clk_iface;
> struct clk *clk;
> - u32 vendor_hs200;
> struct device *dev;
> + u32 vendor_hs200;
No need to change the above.
> + bool enable_cmd_dat_delay;
> };
>
> static void sdhci_f_sdh30_soft_voltage_switch(struct sdhci_host *host)
> @@ -84,10 +86,19 @@ static unsigned int sdhci_f_sdh30_get_min_clock(struct sdhci_host *host)
>
> static void sdhci_f_sdh30_reset(struct sdhci_host *host, u8 mask)
> {
> + struct f_sdhost_priv *priv = sdhci_priv(host);
> + u32 ctl;
> +
> if (sdhci_readw(host, SDHCI_CLOCK_CONTROL) == 0)
> sdhci_writew(host, 0xBC01, SDHCI_CLOCK_CONTROL);
>
> sdhci_reset(host, mask);
> +
> + if (priv->enable_cmd_dat_delay) {
> + ctl = sdhci_readl(host, F_SDH30_ESD_CONTROL);
> + ctl |= F_SDH30_CMD_DAT_DELAY;
> + sdhci_writel(host, ctl, F_SDH30_ESD_CONTROL);
> + }
> }
>
> static const struct sdhci_ops sdhci_f_sdh30_ops = {
> @@ -126,6 +137,11 @@ static int sdhci_f_sdh30_probe(struct platform_device *pdev)
> host->quirks2 = SDHCI_QUIRK2_SUPPORT_SINGLE |
> SDHCI_QUIRK2_TUNING_WORK_AROUND;
>
> + if (device_property_read_bool(dev, "fujitsu,cmd-dat-delay-select")) {
> + dev_info(dev, "Setting cmd-dat-delay\n");
> + priv->enable_cmd_dat_delay = true;
> + }
I don't think there is need to print something due to the parsing.
Let's instead simplify this with:
priv->enable_cmd_dat_delay = device_property_read_bool(dev,
"fujitsu,cmd-dat-delay-select");
> +
> ret = mmc_of_parse(host->mmc);
> if (ret)
> goto err;
> --
> 2.11.0
>
Kind regards
Uffe
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