On 04/07/2024 08:26, Shan-Chun Hung wrote: > Add the SDHCI driver for the MA35D1 platform. It is based upon the > SDHCI interface, but requires some extra initialization. > > Signed-off-by: Shan-Chun Hung <shanchun1218@xxxxxxxxx> > --- > drivers/mmc/host/Kconfig | 12 ++ > drivers/mmc/host/Makefile | 1 + > drivers/mmc/host/sdhci-of-ma35d1.c | 297 +++++++++++++++++++++++++++++ > 3 files changed, 310 insertions(+) > create mode 100644 drivers/mmc/host/sdhci-of-ma35d1.c > > diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig > index bb0d4fb0892a..aa6922ff4210 100644 > --- a/drivers/mmc/host/Kconfig > +++ b/drivers/mmc/host/Kconfig > @@ -252,6 +252,18 @@ config MMC_SDHCI_OF_SPARX5 > > If unsure, say N. > > +config MMC_SDHCI_OF_MA35D1 > + tristate "SDHCI OF support for the MA35D1 SDHCI controller" > + depends on ARCH_MA35 || COMPILE_TEST > + depends on MMC_SDHCI_PLTFM > + help > + This selects the MA35D1 Secure Digital Host Controller Interface. > + The controller supports SD/MMC/SDIO devices. > + > + If you have a controller with this interface, say Y or M here. > + > + If unsure, say N. > + > config MMC_SDHCI_CADENCE > tristate "SDHCI support for the Cadence SD/SDIO/eMMC controller" > depends on MMC_SDHCI_PLTFM > diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile > index f53f86d200ac..3ccffebbe59b 100644 > --- a/drivers/mmc/host/Makefile > +++ b/drivers/mmc/host/Makefile > @@ -88,6 +88,7 @@ obj-$(CONFIG_MMC_SDHCI_OF_ESDHC) += sdhci-of-esdhc.o > obj-$(CONFIG_MMC_SDHCI_OF_HLWD) += sdhci-of-hlwd.o > obj-$(CONFIG_MMC_SDHCI_OF_DWCMSHC) += sdhci-of-dwcmshc.o > obj-$(CONFIG_MMC_SDHCI_OF_SPARX5) += sdhci-of-sparx5.o > +obj-$(CONFIG_MMC_SDHCI_OF_MA35D1) += sdhci-of-ma35d1.o > obj-$(CONFIG_MMC_SDHCI_BCM_KONA) += sdhci-bcm-kona.o > obj-$(CONFIG_MMC_SDHCI_IPROC) += sdhci-iproc.o > obj-$(CONFIG_MMC_SDHCI_NPCM) += sdhci-npcm.o > diff --git a/drivers/mmc/host/sdhci-of-ma35d1.c b/drivers/mmc/host/sdhci-of-ma35d1.c > new file mode 100644 > index 000000000000..b5aab65b9093 > --- /dev/null > +++ b/drivers/mmc/host/sdhci-of-ma35d1.c > @@ -0,0 +1,297 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +/* > + * Copyright (C) 2024 Nuvoton Technology Corp. > + * > + * Author: Shan-Chun Hung <shanchun1218@xxxxxxxxx> > + */ > + > +#include <linux/align.h> > +#include <linux/array_size.h> > +#include <linux/bits.h> > +#include <linux/build_bug.h> > +#include <linux/clk.h> > +#include <linux/delay.h> > +#include <linux/dev_printk.h> > +#include <linux/device.h> > +#include <linux/dma-mapping.h> > +#include <linux/err.h> > +#include <linux/math.h> > +#include <linux/mfd/syscon.h> > +#include <linux/minmax.h> > +#include <linux/mmc/card.h> > +#include <linux/mmc/host.h> > +#include <linux/mod_devicetable.h> > +#include <linux/module.h> > +#include <linux/pinctrl/consumer.h> > +#include <linux/platform_device.h> > +#include <linux/regmap.h> > +#include <linux/reset.h> > +#include <linux/sizes.h> > +#include <linux/types.h> > + > +#include "sdhci-pltfm.h" > +#include "sdhci.h" > + > +#define MA35_SYS_MISCFCR0 0x070 > +#define MA35_SDHCI_MSHCCTL 0x508 > +#define MA35_SDHCI_MBIUCTL 0x510 > + > +#define MA35_SDHCI_CMD_CONFLICT_CHK BIT(0) > +#define MA35_SDHCI_INCR_MSK GENMASK(3, 0) > +#define MA35_SDHCI_INCR16 BIT(3) > +#define MA35_SDHCI_INCR8 BIT(2) > + > +struct ma35_priv { > + struct regmap *regmap; Drop, you don't use it. > + struct reset_control *rst; > + struct pinctrl *pinctrl; > + struct pinctrl_state *pins_uhs; > + struct pinctrl_state *pins_default; > +}; > + > +struct ma35_restore_data { > + u32 reg; > + u32 width; > +}; > + ... > + > +static int ma35_probe(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + struct sdhci_pltfm_host *pltfm_host; > + struct sdhci_host *host; > + struct ma35_priv *priv; > + int err; > + u32 extra, ctl; > + > + host = sdhci_pltfm_init(pdev, &sdhci_ma35_pdata, sizeof(struct ma35_priv)); > + if (IS_ERR(host)) > + return PTR_ERR(host); > + > + /* Extra adma table cnt for cross 128M boundary handling. */ > + extra = DIV_ROUND_UP_ULL(dma_get_required_mask(dev), SZ_128M); > + extra = min(extra, SDHCI_MAX_SEGS); > + > + host->adma_table_cnt += extra; > + pltfm_host = sdhci_priv(host); > + priv = sdhci_pltfm_priv(pltfm_host); > + > + pltfm_host->clk = devm_clk_get_optional_enabled(dev, NULL); > + if (IS_ERR(pltfm_host->clk)) { > + err = PTR_ERR(pltfm_host->clk); > + dev_err_probe(dev, err, "failed to get clk\n"); Syntax is err = dev_err_probe() > + goto err_sdhci; > + } > + > + err = mmc_of_parse(host->mmc); > + if (err) > + goto err_sdhci; > + > + priv->rst = devm_reset_control_get_exclusive(dev, NULL); > + if (IS_ERR(priv->rst)) { > + err = PTR_ERR(priv->rst); > + dev_err_probe(dev, err, "failed to get reset control\n"); err = dev_err_probe ... so all your previous versions were leaking memory. Double check your error paths. > + goto err_sdhci; > + } > + > + sdhci_get_of_property(pdev); > + Best regards, Krzysztof