diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2017-10-19 13:41:45 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-11-02 17:20:27 +0300 |
| commit | f07b7952df3b3ff014e83952b402425cf50c51ce (patch) | |
| tree | 746b03e5cb6cbff099e34e1d18e8211c27b298a0 /drivers/mmc/host/sdhci-acpi.c | |
| parent | 6b10c9abfbceaf94ef227d98317020c557996186 (diff) | |
| download | linux-f07b7952df3b3ff014e83952b402425cf50c51ce.tar.xz | |
mmc: sdhci-acpi: Let devices define their own private data
Let devices define their own private data to facilitate device-specific
operations. The size of the private structure is specified in the
sdhci_acpi_slot structure, then sdhci_acpi_probe() will allocate extra
space for it, and sdhci_acpi_priv() can be used to get a reference to it.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/sdhci-acpi.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-acpi.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c index 640be5b618fc..5bb5880403b2 100644 --- a/drivers/mmc/host/sdhci-acpi.c +++ b/drivers/mmc/host/sdhci-acpi.c @@ -73,6 +73,7 @@ struct sdhci_acpi_slot { unsigned int caps2; mmc_pm_flag_t pm_caps; unsigned int flags; + size_t priv_size; int (*probe_slot)(struct platform_device *, const char *, const char *); int (*remove_slot)(struct platform_device *); }; @@ -82,8 +83,14 @@ struct sdhci_acpi_host { const struct sdhci_acpi_slot *slot; struct platform_device *pdev; bool use_runtime_pm; + unsigned long private[0] ____cacheline_aligned; }; +static inline void *sdhci_acpi_priv(struct sdhci_acpi_host *c) +{ + return (void *)c->private; +} + static inline bool sdhci_acpi_flag(struct sdhci_acpi_host *c, unsigned int flag) { return c->slot && (c->slot->flags & flag); @@ -393,11 +400,13 @@ static const struct sdhci_acpi_slot *sdhci_acpi_get_slot(const char *hid, static int sdhci_acpi_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; + const struct sdhci_acpi_slot *slot; struct acpi_device *device, *child; struct sdhci_acpi_host *c; struct sdhci_host *host; struct resource *iomem; resource_size_t len; + size_t priv_size; const char *hid; const char *uid; int err; @@ -409,6 +418,8 @@ static int sdhci_acpi_probe(struct platform_device *pdev) hid = acpi_device_hid(device); uid = acpi_device_uid(device); + slot = sdhci_acpi_get_slot(hid, uid); + /* Power on the SDHCI controller and its children */ acpi_device_fix_up_power(device); if (!sdhci_acpi_no_fixup_child_power(hid, uid)) { @@ -431,13 +442,14 @@ static int sdhci_acpi_probe(struct platform_device *pdev) if (!devm_request_mem_region(dev, iomem->start, len, dev_name(dev))) return -ENOMEM; - host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host)); + priv_size = slot ? slot->priv_size : 0; + host = sdhci_alloc_host(dev, sizeof(struct sdhci_acpi_host) + priv_size); if (IS_ERR(host)) return PTR_ERR(host); c = sdhci_priv(host); c->host = host; - c->slot = sdhci_acpi_get_slot(hid, uid); + c->slot = slot; c->pdev = pdev; c->use_runtime_pm = sdhci_acpi_flag(c, SDHCI_ACPI_RUNTIME_PM); |