Re: [PATCH] mmc: arm_pl180_mmci: Rely on DM

On 2/8/24 18:33, Linus Walleij wrote:

The PL180/MMCI driver is implied to use CONFIG_DM and the ARM defconfigs such as configs/vexpress_ca9x4_defconfig will get it as well.

With a simple oneline to default to not being the v2 variant, the original ARM MMCI variant works fine with the driver as well. The IP version actually needs to be read out from a register on the ARM versions, but we will simply assume we are running on the original hardware if arm,primecell-periphid is not explicitly specified in the device tree.

Drop the !CONFIG_DM code and depend on DM_MMC.

Tested on the Versatile Express CA9x4 board.

Signed-off-by: Linus Walleij linus.walleij@linaro.org

Reviewed-by: Jaehoon Chung jh80.chung@samsung.com

Sorry for late. I will apply this patch to u-boot-mmc/master. Thanks.

Best Regards, Jaehoon Chung

---

drivers/mmc/Kconfig | 1 + drivers/mmc/arm_pl180_mmci.c | 66 ++------------------------------------------ 2 files changed, 3 insertions(+), 64 deletions(-)

---

base-commit: 0101a2ffe125911ebf89172b495f5ff14f2fd058 change-id: 20240208-uboot-vexpress-ca9-127bd6b163df

Best regards,

diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig index 17618c3bdcc1..59716c3966e5 100644 --- a/drivers/mmc/Kconfig +++ b/drivers/mmc/Kconfig @@ -79,6 +79,7 @@ config MMC_SPI_CRC_ON

config ARM_PL180_MMCI bool "ARM AMBA Multimedia Card Interface and compatible support"

• depends on DM_MMC help This selects the ARM(R) AMBA(R) PrimeCell Multimedia Card Interface (PL180, PL181 and compatible) support.

diff --git a/drivers/mmc/arm_pl180_mmci.c b/drivers/mmc/arm_pl180_mmci.c index 5cf5502ed545..2666b65362bc 100644 --- a/drivers/mmc/arm_pl180_mmci.c +++ b/drivers/mmc/arm_pl180_mmci.c @@ -18,6 +18,7 @@ #include <malloc.h> #include <mmc.h> #include <dm/device_compat.h> +#include <dm.h>

#include <asm/io.h> #include <asm-generic/gpio.h> @@ -25,8 +26,6 @@ #include "arm_pl180_mmci.h" #include <linux/delay.h>

-#ifdef CONFIG_DM_MMC -#include <dm.h> #define MMC_CLOCK_MAX 48000000 #define MMC_CLOCK_MIN 400000

@@ -34,7 +33,6 @@ struct arm_pl180_mmc_plat { struct mmc_config cfg; struct mmc mmc; }; -#endif

static int wait_for_command_end(struct mmc *dev, struct mmc_cmd *cmd) { @@ -358,65 +356,6 @@ static int host_set_ios(struct mmc *dev) return 0; }

-#ifndef CONFIG_DM_MMC -/* MMC uses open drain drivers in the enumeration phase */ -static int mmc_host_reset(struct mmc *dev) -{

• struct pl180_mmc_host *host = dev->priv;
• writel(host->pwr_init, &host->base->power);
• return 0;

-}

-static const struct mmc_ops arm_pl180_mmci_ops = {

• .send_cmd = host_request,
• .set_ios = host_set_ios,
• .init = mmc_host_reset,

-};

-/*

• • mmc_host_init - initialize the mmc controller.
• • Set initial clock and power for mmc slot.
• • Initialize mmc struct and register with mmc framework.
• */

-int arm_pl180_mmci_init(struct pl180_mmc_host *host, struct mmc **mmc) -{

• u32 sdi_u32;
• writel(host->pwr_init, &host->base->power);
• writel(host->clkdiv_init, &host->base->clock);
• udelay(CLK_CHANGE_DELAY);
• /* Disable mmc interrupts */
• sdi_u32 = readl(&host->base->mask0) & ~SDI_MASK0_MASK;
• writel(sdi_u32, &host->base->mask0);
• host->cfg.name = host->name;
• host->cfg.ops = &arm_pl180_mmci_ops;
• /* TODO remove the duplicates */
• host->cfg.host_caps = host->caps;
• host->cfg.voltages = host->voltages;
• host->cfg.f_min = host->clock_min;
• host->cfg.f_max = host->clock_max;
• if (host->b_max != 0)

• host->cfg.b_max = host->b_max;
  

• else

• host->cfg.b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
  

• *mmc = mmc_create(&host->cfg, host);
• if (!*mmc)

• return -1;
  

• debug("registered mmc interface number is:%d\n",

•      (*mmc)->block_dev.devnum);
  

• return 0;

-} -#endif

-#ifdef CONFIG_DM_MMC static void arm_pl180_mmc_init(struct pl180_mmc_host *host) { u32 sdi_u32; @@ -477,7 +416,7 @@ static int arm_pl180_mmc_probe(struct udevice *dev) host->version2 = true; break; default:

• host->version2 = true;
  

• host->version2 = false; /* ARM variant */
  

  }

  gpio_request_by_name(dev, "cd-gpios", 0, &host->cd_gpio, GPIOD_IS_IN);

@@ -561,4 +500,3 @@ U_BOOT_DRIVER(arm_pl180_mmc) = { .priv_auto = sizeof(struct pl180_mmc_host), .plat_auto = sizeof(struct arm_pl180_mmc_plat), }; -#endif