| Message ID | 20241022141659.18764-1-quic_sachgupt@quicinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | mmc: sdhci-msm: Add sysfs attribute for error state in SDHCI MSM driver | expand |
On 10/24/2024 4:54 PM, Adrian Hunter wrote: > On 22/10/24 17:16, Sachin Gupta wrote: >> Introduce a new sysfs attribute err_state to the SDHCI MSM driver. >> The attribute allows users to query the error state of the SDHCI host controller. > > We already have err_stats and err_state in debugfs. That seems > more appropriate. > Thanks Adrian for pointing this out. I will check and get back. >> >> Signed-off-by: Sachin Gupta <quic_sachgupt@quicinc.com> >> Signed-off-by: Sarthak Garg <quic_sartgarg@quicinc.com> >> --- >> drivers/mmc/host/sdhci-msm.c | 40 ++++++++++++++++++++++++++++++++++++ >> 1 file changed, 40 insertions(+) >> >> diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c >> index e113b99a3eab..a256e3569a92 100644 >> --- a/drivers/mmc/host/sdhci-msm.c >> +++ b/drivers/mmc/host/sdhci-msm.c >> @@ -290,6 +290,7 @@ struct sdhci_msm_host { >> u32 dll_config; >> u32 ddr_config; >> bool vqmmc_enabled; >> + bool err_occurred; >> }; >> >> static const struct sdhci_msm_offset *sdhci_priv_msm_offset(struct sdhci_host *host) >> @@ -2255,6 +2256,8 @@ static void sdhci_msm_dump_vendor_regs(struct sdhci_host *host) >> struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); >> const struct sdhci_msm_offset *msm_offset = msm_host->offset; >> >> + msm_host->err_occurred = true; >> + >> SDHCI_MSM_DUMP("----------- VENDOR REGISTER DUMP -----------\n"); >> >> SDHCI_MSM_DUMP( >> @@ -2398,6 +2401,41 @@ static int sdhci_msm_gcc_reset(struct device *dev, struct sdhci_host *host) >> return ret; >> } >> >> +static ssize_t err_state_show(struct device *dev, >> + struct device_attribute *attr, char *buf) >> +{ >> + struct sdhci_host *host = dev_get_drvdata(dev); >> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); >> + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); >> + >> + if (!host || !host->mmc) >> + return -EINVAL; >> + >> + return scnprintf(buf, PAGE_SIZE, "%d\n", !!msm_host->err_occurred); >> +} >> + >> +static DEVICE_ATTR_RO(err_state); >> + >> +static struct attribute *sdhci_msm_sysfs_attrs[] = { >> + &dev_attr_err_state.attr, >> + NULL >> +}; >> + >> +static const struct attribute_group sdhci_msm_sysfs_group = { >> + .name = "qcom", >> + .attrs = sdhci_msm_sysfs_attrs, >> +}; >> + >> +static void sdhci_msm_init_sysfs(struct device *dev) >> +{ >> + int ret; >> + >> + ret = sysfs_create_group(&dev->kobj, &sdhci_msm_sysfs_group); >> + if (ret) >> + dev_err(dev, "%s: Failed to create qcom sysfs group (err = %d)\n", >> + __func__, ret); >> +} >> + >> static int sdhci_msm_probe(struct platform_device *pdev) >> { >> struct sdhci_host *host; >> @@ -2442,6 +2480,8 @@ static int sdhci_msm_probe(struct platform_device *pdev) >> sdhci_get_of_property(pdev); >> sdhci_msm_get_of_property(pdev, host); >> >> + sdhci_msm_init_sysfs(&pdev->dev); >> + >> msm_host->saved_tuning_phase = INVALID_TUNING_PHASE; >> >> ret = sdhci_msm_gcc_reset(&pdev->dev, host); >
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c index e113b99a3eab..a256e3569a92 100644 --- a/drivers/mmc/host/sdhci-msm.c +++ b/drivers/mmc/host/sdhci-msm.c @@ -290,6 +290,7 @@ struct sdhci_msm_host { u32 dll_config; u32 ddr_config; bool vqmmc_enabled; + bool err_occurred; }; static const struct sdhci_msm_offset *sdhci_priv_msm_offset(struct sdhci_host *host) @@ -2255,6 +2256,8 @@ static void sdhci_msm_dump_vendor_regs(struct sdhci_host *host) struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); const struct sdhci_msm_offset *msm_offset = msm_host->offset; + msm_host->err_occurred = true; + SDHCI_MSM_DUMP("----------- VENDOR REGISTER DUMP -----------\n"); SDHCI_MSM_DUMP( @@ -2398,6 +2401,41 @@ static int sdhci_msm_gcc_reset(struct device *dev, struct sdhci_host *host) return ret; } +static ssize_t err_state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct sdhci_host *host = dev_get_drvdata(dev); + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host); + struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host); + + if (!host || !host->mmc) + return -EINVAL; + + return scnprintf(buf, PAGE_SIZE, "%d\n", !!msm_host->err_occurred); +} + +static DEVICE_ATTR_RO(err_state); + +static struct attribute *sdhci_msm_sysfs_attrs[] = { + &dev_attr_err_state.attr, + NULL +}; + +static const struct attribute_group sdhci_msm_sysfs_group = { + .name = "qcom", + .attrs = sdhci_msm_sysfs_attrs, +}; + +static void sdhci_msm_init_sysfs(struct device *dev) +{ + int ret; + + ret = sysfs_create_group(&dev->kobj, &sdhci_msm_sysfs_group); + if (ret) + dev_err(dev, "%s: Failed to create qcom sysfs group (err = %d)\n", + __func__, ret); +} + static int sdhci_msm_probe(struct platform_device *pdev) { struct sdhci_host *host; @@ -2442,6 +2480,8 @@ static int sdhci_msm_probe(struct platform_device *pdev) sdhci_get_of_property(pdev); sdhci_msm_get_of_property(pdev, host); + sdhci_msm_init_sysfs(&pdev->dev); + msm_host->saved_tuning_phase = INVALID_TUNING_PHASE; ret = sdhci_msm_gcc_reset(&pdev->dev, host);