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mmc: Merge branch fixes into next

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Merge the mmc fixes for v6.8-rc[n] into the next branch, to allow them to
get tested together with the new mmc changes that are targeted for v6.9.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Ulf Hansson 2024-02-28 13:42:37 +01:00
commit 6e860b05a0
1 changed files with 39 additions and 9 deletions
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48
drivers/mmc/host/sdhci-xenon-phy.c
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@ -11,6 +11,7 @@
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/ktime.h>
#include <linux/iopoll.h>
#include <linux/of_address.h>
#include "sdhci-pltfm.h"
@ -109,6 +110,8 @@
#define XENON_EMMC_PHY_LOGIC_TIMING_ADJUST (XENON_EMMC_PHY_REG_BASE + 0x18)
#define XENON_LOGIC_TIMING_VALUE 0x00AA8977
#define XENON_MAX_PHY_TIMEOUT_LOOPS 100
/*
* List offset of PHY registers and some special register values
* in eMMC PHY 5.0 or eMMC PHY 5.1
@ -216,6 +219,19 @@ static int xenon_alloc_emmc_phy(struct sdhci_host *host)
return 0;
}
static int xenon_check_stability_internal_clk(struct sdhci_host *host)
{
u32 reg;
int err;
err = read_poll_timeout(sdhci_readw, reg, reg & SDHCI_CLOCK_INT_STABLE,
1100, 20000, false, host, SDHCI_CLOCK_CONTROL);
if (err)
dev_err(mmc_dev(host->mmc), "phy_init: Internal clock never stabilized.\n");
return err;
}
/*
* eMMC 5.0/5.1 PHY init/re-init.
* eMMC PHY init should be executed after:
@ -232,6 +248,11 @@ static int xenon_emmc_phy_init(struct sdhci_host *host)
struct xenon_priv *priv = sdhci_pltfm_priv(pltfm_host);
struct xenon_emmc_phy_regs *phy_regs = priv->emmc_phy_regs;
int ret = xenon_check_stability_internal_clk(host);
if (ret)
return ret;
reg = sdhci_readl(host, phy_regs->timing_adj);
reg |= XENON_PHY_INITIALIZAION;
sdhci_writel(host, reg, phy_regs->timing_adj);
@ -259,18 +280,27 @@ static int xenon_emmc_phy_init(struct sdhci_host *host)
/* get the wait time */
wait /= clock;
wait++;
/* wait for host eMMC PHY init completes */
udelay(wait);
reg = sdhci_readl(host, phy_regs->timing_adj);
reg &= XENON_PHY_INITIALIZAION;
if (reg) {
/*
* AC5X spec says bit must be polled until zero.
* We see cases in which timeout can take longer
* than the standard calculation on AC5X, which is
* expected following the spec comment above.
* According to the spec, we must wait as long as
* it takes for that bit to toggle on AC5X.
* Cap that with 100 delay loops so we won't get
* stuck here forever:
*/
ret = read_poll_timeout(sdhci_readl, reg,
!(reg & XENON_PHY_INITIALIZAION),
wait, XENON_MAX_PHY_TIMEOUT_LOOPS * wait,
false, host, phy_regs->timing_adj);
if (ret)
dev_err(mmc_dev(host->mmc), "eMMC PHY init cannot complete after %d us\n",
wait);
return -ETIMEDOUT;
}
wait * XENON_MAX_PHY_TIMEOUT_LOOPS);
return 0;
return ret;
}
#define ARMADA_3700_SOC_PAD_1_8V 0x1