Add Nuvoton NPCM BMC sdhci-pltfm controller driver.
Signed-off-by: Tomer Maimon <tmaimon77@xxxxxxxxx>
---
drivers/mmc/host/Kconfig | 8 ++++
drivers/mmc/host/Makefile | 1 +
drivers/mmc/host/sdhci-npcm.c | 84 +++++++++++++++++++++++++++++++++++
3 files changed, 93 insertions(+)
create mode 100644 drivers/mmc/host/sdhci-npcm.c
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index fb1062a6394c..82ab6fc25dca 100644
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -415,6 +415,14 @@ config MMC_SDHCI_MILBEAUT
If unsure, say N.
+config MMC_SDHCI_NPCM
+ tristate "Secure Digital Host Controller Interface support for NPCM"
+ depends on ARCH_NPCM || COMPILE_TEST
+ depends on MMC_SDHCI_PLTFM
+ help
+ This provides support for the SD/eMMC controller found in
+ NPCM BMC family SoCs.
+
config MMC_SDHCI_IPROC
tristate "SDHCI support for the BCM2835 & iProc SD/MMC Controller"
depends on ARCH_BCM2835 || ARCH_BCM_IPROC || ARCH_BRCMSTB || COMPILE_TEST
diff --git a/drivers/mmc/host/Makefile b/drivers/mmc/host/Makefile
index 4e4ceb32c4b4..a101f87a5f19 100644
--- a/drivers/mmc/host/Makefile
+++ b/drivers/mmc/host/Makefile
@@ -97,6 +97,7 @@ obj-$(CONFIG_MMC_SDHCI_MICROCHIP_PIC32) += sdhci-pic32.o
obj-$(CONFIG_MMC_SDHCI_BRCMSTB) += sdhci-brcmstb.o
obj-$(CONFIG_MMC_SDHCI_OMAP) += sdhci-omap.o
obj-$(CONFIG_MMC_SDHCI_SPRD) += sdhci-sprd.o
+obj-$(CONFIG_MMC_SDHCI_NPCM) += sdhci-npcm.o
obj-$(CONFIG_MMC_CQHCI) += cqhci.o
cqhci-y += cqhci-core.o
cqhci-$(CONFIG_MMC_CRYPTO) += cqhci-crypto.o
diff --git a/drivers/mmc/host/sdhci-npcm.c b/drivers/mmc/host/sdhci-npcm.c
new file mode 100644
index 000000000000..beace15b6c00
--- /dev/null
+++ b/drivers/mmc/host/sdhci-npcm.c
@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * NPCM SDHC MMC host controller driver.
+ *
+ * Copyright (c) 2020 Nuvoton Technology corporation.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/mmc/host.h>
+#include <linux/mmc/mmc.h>
+#include <linux/module.h>
+
+#include "sdhci-pltfm.h"
+
+static const struct sdhci_pltfm_data npcm_sdhci_pdata = {
+ .quirks = SDHCI_QUIRK_DELAY_AFTER_POWER,
+ .quirks2 = SDHCI_QUIRK2_STOP_WITH_TC |
+ SDHCI_QUIRK2_NO_1_8_V,
+};
+
+static int npcm_sdhci_probe(struct platform_device *pdev)
+{
+ struct sdhci_pltfm_host *pltfm_host;
+ struct sdhci_host *host;
+ u32 caps;
+ int ret;
+
+ host = sdhci_pltfm_init(pdev, &npcm_sdhci_pdata, 0);
+ if (IS_ERR(host))
+ return PTR_ERR(host);
+
+ pltfm_host = sdhci_priv(host);
+
+ pltfm_host->clk = devm_clk_get_optional(&pdev->dev, NULL);
+ if (IS_ERR(pltfm_host->clk))
+ return PTR_ERR(pltfm_host->clk);
+
+ ret = clk_prepare_enable(pltfm_host->clk);
+ if (ret)
+ return ret;
+
+ caps = sdhci_readl(host, SDHCI_CAPABILITIES);
+ if (caps & SDHCI_CAN_DO_8BIT)
+ host->mmc->caps |= MMC_CAP_8_BIT_DATA;
+
+ ret = mmc_of_parse(host->mmc);
+ if (ret)
+ goto err_sdhci_add;
+
+ ret = sdhci_add_host(host);
+ if (ret)
+ goto err_sdhci_add;
+
+ return 0;
+
+err_sdhci_add:
+ clk_disable_unprepare(pltfm_host->clk);
+ sdhci_pltfm_free(pdev);
+ return ret;
+}
+
+static const struct of_device_id npcm_sdhci_of_match[] = {
+ { .compatible = "nuvoton,npcm750-sdhci" },
+ { .compatible = "nuvoton,npcm845-sdhci" },
+ { }
+};
+MODULE_DEVICE_TABLE(of, npcm_sdhci_of_match);
+
+static struct platform_driver npcm_sdhci_driver = {
+ .driver = {
+ .name = "npcm-sdhci",
+ .of_match_table = npcm_sdhci_of_match,
+ .pm = &sdhci_pltfm_pmops,
+ },
+ .probe = npcm_sdhci_probe,
+ .remove = sdhci_pltfm_unregister,
+};
+module_platform_driver(npcm_sdhci_driver);
+
+MODULE_DESCRIPTION("NPCM Secure Digital Host Controller Interface driver");
+MODULE_AUTHOR("Tomer Maimon <tomer.maimon@xxxxxxxxxxx>");
+MODULE_LICENSE("GPL");
--
2.33.0
