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authorMasahiro Yamada <yamada.masahiro@socionext.com>2018-01-18 01:28:01 +0900
committerUlf Hansson <ulf.hansson@linaro.org>2018-01-18 09:08:56 +0100
commit8d09a13386ccdee8fb6d66aa2cfedbbc9255f892 (patch)
tree6fdde1ef07579de4e1709f2bc14d10299dda8a66 /drivers
parent659032dcb9f11c3bd2a3a23db76e6a70b3ddec79 (diff)
downloadlinux-8d09a13386ccdee8fb6d66aa2cfedbbc9255f892.tar.bz2
mmc: tmio: ioremap memory resource in tmio_mmc_host_alloc()
The register region is ioremap'ed in the tmio_mmc_host_probe(), i.e. drivers cannot get access to the hardware before mmc_add_host(). Actually, renesas_sdhi_core.c reads out the CTL_VERSION register to complete the platform-specific settings. However, at this point, the MMC host is already running. Move the register ioremap to tmio_mmc_host_alloc() so that drivers can perform platform-specific settings between tmio_mmc_host_alloc() and tmio_mmc_host_probe(). I changed tmio_mmc_host_alloc() to return an error pointer to propagate the return code from devm_ioremap_resource(). Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mmc/host/renesas_sdhi_core.c4
-rw-r--r--drivers/mmc/host/tmio_mmc.c4
-rw-r--r--drivers/mmc/host/tmio_mmc_core.c16
3 files changed, 14 insertions, 10 deletions
diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
index 6a2988bd51a2..ccdde2735f68 100644
--- a/drivers/mmc/host/renesas_sdhi_core.c
+++ b/drivers/mmc/host/renesas_sdhi_core.c
@@ -512,8 +512,8 @@ int renesas_sdhi_probe(struct platform_device *pdev,
}
host = tmio_mmc_host_alloc(pdev);
- if (!host)
- return -ENOMEM;
+ if (IS_ERR(host))
+ return PTR_ERR(host);
if (of_data) {
mmc_data->flags |= of_data->tmio_flags;
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index ccfbc154ee5b..d660816bdf89 100644
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -93,8 +93,10 @@ static int tmio_mmc_probe(struct platform_device *pdev)
pdata->flags |= TMIO_MMC_HAVE_HIGH_REG;
host = tmio_mmc_host_alloc(pdev);
- if (!host)
+ if (IS_ERR(host)) {
+ ret = PTR_ERR(host);
goto cell_disable;
+ }
/* SD control register space size is 0x200, 0x400 for bus_shift=1 */
host->bus_shift = resource_size(res) >> 10;
diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c
index 0929b987fb29..4f62ce6664e0 100644
--- a/drivers/mmc/host/tmio_mmc_core.c
+++ b/drivers/mmc/host/tmio_mmc_core.c
@@ -1150,12 +1150,20 @@ tmio_mmc_host_alloc(struct platform_device *pdev)
{
struct tmio_mmc_host *host;
struct mmc_host *mmc;
+ struct resource *res;
+ void __iomem *ctl;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ ctl = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(ctl))
+ return ERR_CAST(ctl);
mmc = mmc_alloc_host(sizeof(struct tmio_mmc_host), &pdev->dev);
if (!mmc)
- return NULL;
+ return ERR_PTR(-ENOMEM);
host = mmc_priv(mmc);
+ host->ctl = ctl;
host->mmc = mmc;
host->pdev = pdev;
host->ops = tmio_mmc_ops;
@@ -1177,7 +1185,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
{
struct platform_device *pdev = _host->pdev;
struct mmc_host *mmc = _host->mmc;
- struct resource *res_ctl;
int ret;
u32 irq_mask = TMIO_MASK_CMD;
@@ -1186,11 +1193,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
if (!(pdata->flags & TMIO_MMC_HAS_IDLE_WAIT))
_host->write16_hook = NULL;
- res_ctl = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- _host->ctl = devm_ioremap_resource(&pdev->dev, res_ctl);
- if (IS_ERR(_host->ctl))
- return PTR_ERR(_host->ctl);
-
ret = mmc_of_parse(mmc);
if (ret < 0)
return ret;