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mmc: remove cns3xxx driver

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The cns3xxx platform is gone, so this driver is now orphaned.

Cc: Krzysztof Halasa <khalasa@piap.pl>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2022-09-30 13:09:59 +02:00
parent e73307b9eb
commit 4ede65e1c1
3 changed files with 0 additions and 125 deletions
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11
drivers/mmc/host/Kconfig
View file

@ -262,17 +262,6 @@ config MMC_SDHCI_CADENCE
If unsure, say N.
config MMC_SDHCI_CNS3XXX
tristate "SDHCI support on the Cavium Networks CNS3xxx SoC"
depends on ARCH_CNS3XXX || COMPILE_TEST
depends on MMC_SDHCI_PLTFM
help
This selects the SDHCI support for CNS3xxx System-on-Chip devices.
If you have a controller with this interface, say Y or M here.
If unsure, say N.
config MMC_SDHCI_ESDHC_MCF
tristate "SDHCI support for the Freescale eSDHC ColdFire controller"
depends on M5441x

1
drivers/mmc/host/Makefile
View file

@ -77,7 +77,6 @@ obj-$(CONFIG_MMC_REALTEK_USB) += rtsx_usb_sdmmc.o
obj-$(CONFIG_MMC_SDHCI_PLTFM) += sdhci-pltfm.o
obj-$(CONFIG_MMC_SDHCI_CADENCE) += sdhci-cadence.o
obj-$(CONFIG_MMC_SDHCI_CNS3XXX) += sdhci-cns3xxx.o
obj-$(CONFIG_MMC_SDHCI_ESDHC_MCF) += sdhci-esdhc-mcf.o
obj-$(CONFIG_MMC_SDHCI_ESDHC_IMX) += sdhci-esdhc-imx.o
obj-$(CONFIG_MMC_SDHCI_DOVE) += sdhci-dove.o

113
drivers/mmc/host/sdhci-cns3xxx.c
View file

@ -1,113 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* SDHCI support for CNS3xxx SoC
*
* Copyright 2008 Cavium Networks
* Copyright 2010 MontaVista Software, LLC.
*
* Authors: Scott Shu
* Anton Vorontsov <avorontsov@mvista.com>
*/
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/mmc/host.h>
#include <linux/module.h>
#include "sdhci-pltfm.h"
static unsigned int sdhci_cns3xxx_get_max_clk(struct sdhci_host *host)
{
return 150000000;
}
static void sdhci_cns3xxx_set_clock(struct sdhci_host *host, unsigned int clock)
{
struct device *dev = mmc_dev(host->mmc);
int div = 1;
u16 clk;
unsigned long timeout;
host->mmc->actual_clock = 0;
sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
if (clock == 0)
return;
while (host->max_clk / div > clock) {
/*
* On CNS3xxx divider grows linearly up to 4, and then
* exponentially up to 256.
*/
if (div < 4)
div += 1;
else if (div < 256)
div *= 2;
else
break;
}
dev_dbg(dev, "desired SD clock: %d, actual: %d\n",
clock, host->max_clk / div);
/* Divide by 3 is special. */
if (div != 3)
div >>= 1;
clk = div << SDHCI_DIVIDER_SHIFT;
clk |= SDHCI_CLOCK_INT_EN;
sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
timeout = 20;
while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
& SDHCI_CLOCK_INT_STABLE)) {
if (timeout == 0) {
dev_warn(dev, "clock is unstable");
break;
}
timeout--;
mdelay(1);
}
clk |= SDHCI_CLOCK_CARD_EN;
sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
}
static const struct sdhci_ops sdhci_cns3xxx_ops = {
.get_max_clock = sdhci_cns3xxx_get_max_clk,
.set_clock = sdhci_cns3xxx_set_clock,
.set_bus_width = sdhci_set_bus_width,
.reset = sdhci_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,
};
static const struct sdhci_pltfm_data sdhci_cns3xxx_pdata = {
.ops = &sdhci_cns3xxx_ops,
.quirks = SDHCI_QUIRK_BROKEN_DMA |
SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK |
SDHCI_QUIRK_INVERTED_WRITE_PROTECT |
SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN |
SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
};
static int sdhci_cns3xxx_probe(struct platform_device *pdev)
{
return sdhci_pltfm_register(pdev, &sdhci_cns3xxx_pdata, 0);
}
static struct platform_driver sdhci_cns3xxx_driver = {
.driver = {
.name = "sdhci-cns3xxx",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
.pm = &sdhci_pltfm_pmops,
},
.probe = sdhci_cns3xxx_probe,
.remove = sdhci_pltfm_unregister,
};
module_platform_driver(sdhci_cns3xxx_driver);
MODULE_DESCRIPTION("SDHCI driver for CNS3xxx");
MODULE_AUTHOR("Scott Shu, "
"Anton Vorontsov <avorontsov@mvista.com>");
MODULE_LICENSE("GPL v2");