[PATCH v2 20/22] mmc: tmio: move clk_enable/disable out of tmio_mmc_host_probe()
From: Masahiro Yamada
Date: Fri Nov 24 2017 - 11:29:42 EST
The clock is enabled in the tmio_mmc_host_probe(). It also prevents
drivers from performing platform-specific settings before mmc_add_host()
because the register access generally requires a clock.
Enable/disable the clock in drivers' probe/remove. Also, I passed
tmio_mmc_data to tmio_mmc_host_alloc() because renesas_sdhi_clk_enable()
needs it to get the private data from tmio_mmc_host.
Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
---
Changes in v2:
- Newly added
drivers/mmc/host/renesas_sdhi_core.c | 13 ++++++++++---
drivers/mmc/host/tmio_mmc.c | 7 +++++--
drivers/mmc/host/tmio_mmc.h | 4 ++--
drivers/mmc/host/tmio_mmc_core.c | 33 +++++++++++++--------------------
4 files changed, 30 insertions(+), 27 deletions(-)
diff --git a/drivers/mmc/host/renesas_sdhi_core.c b/drivers/mmc/host/renesas_sdhi_core.c
index 446ff54..a5749d7 100644
--- a/drivers/mmc/host/renesas_sdhi_core.c
+++ b/drivers/mmc/host/renesas_sdhi_core.c
@@ -510,7 +510,7 @@ int renesas_sdhi_probe(struct platform_device *pdev,
"state_uhs");
}
- host = tmio_mmc_host_alloc(pdev);
+ host = tmio_mmc_host_alloc(pdev, mmc_data);
if (IS_ERR(host))
return PTR_ERR(host);
@@ -570,10 +570,14 @@ int renesas_sdhi_probe(struct platform_device *pdev,
/* All SDHI have SDIO status bits which must be 1 */
mmc_data->flags |= TMIO_MMC_SDIO_STATUS_SETBITS;
- ret = tmio_mmc_host_probe(host, mmc_data, dma_ops);
- if (ret < 0)
+ ret = renesas_sdhi_clk_enable(host);
+ if (ret)
goto efree;
+ ret = tmio_mmc_host_probe(host, dma_ops);
+ if (ret < 0)
+ goto edisclk;
+
/* One Gen2 SDHI incarnation does NOT have a CBSY bit */
if (sd_ctrl_read16(host, CTL_VERSION) == SDHI_VER_GEN2_SDR50)
mmc_data->flags &= ~TMIO_MMC_HAVE_CBSY;
@@ -634,6 +638,8 @@ int renesas_sdhi_probe(struct platform_device *pdev,
eirq:
tmio_mmc_host_remove(host);
+edisclk:
+ renesas_sdhi_clk_disable(host);
efree:
tmio_mmc_host_free(host);
@@ -646,6 +652,7 @@ int renesas_sdhi_remove(struct platform_device *pdev)
struct tmio_mmc_host *host = platform_get_drvdata(pdev);
tmio_mmc_host_remove(host);
+ renesas_sdhi_clk_disable(host);
return 0;
}
diff --git a/drivers/mmc/host/tmio_mmc.c b/drivers/mmc/host/tmio_mmc.c
index d660816..11b87ce 100644
--- a/drivers/mmc/host/tmio_mmc.c
+++ b/drivers/mmc/host/tmio_mmc.c
@@ -92,7 +92,7 @@ static int tmio_mmc_probe(struct platform_device *pdev)
pdata->flags |= TMIO_MMC_HAVE_HIGH_REG;
- host = tmio_mmc_host_alloc(pdev);
+ host = tmio_mmc_host_alloc(pdev, pdata);
if (IS_ERR(host)) {
ret = PTR_ERR(host);
goto cell_disable;
@@ -101,7 +101,10 @@ static int tmio_mmc_probe(struct platform_device *pdev)
/* SD control register space size is 0x200, 0x400 for bus_shift=1 */
host->bus_shift = resource_size(res) >> 10;
- ret = tmio_mmc_host_probe(host, pdata, NULL);
+ host->mmc->f_max = pdata->hclk;
+ host->mmc->f_min = pdata->hclk / 512;
+
+ ret = tmio_mmc_host_probe(host, NULL);
if (ret)
goto host_free;
diff --git a/drivers/mmc/host/tmio_mmc.h b/drivers/mmc/host/tmio_mmc.h
index 27894474..f46d282 100644
--- a/drivers/mmc/host/tmio_mmc.h
+++ b/drivers/mmc/host/tmio_mmc.h
@@ -195,10 +195,10 @@ struct tmio_mmc_host {
const struct tmio_mmc_dma_ops *dma_ops;
};
-struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev);
+struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev,
+ struct tmio_mmc_data *pdata);
void tmio_mmc_host_free(struct tmio_mmc_host *host);
int tmio_mmc_host_probe(struct tmio_mmc_host *host,
- struct tmio_mmc_data *pdata,
const struct tmio_mmc_dma_ops *dma_ops);
void tmio_mmc_host_remove(struct tmio_mmc_host *host);
void tmio_mmc_do_data_irq(struct tmio_mmc_host *host);
diff --git a/drivers/mmc/host/tmio_mmc_core.c b/drivers/mmc/host/tmio_mmc_core.c
index c392694..b51486d 100644
--- a/drivers/mmc/host/tmio_mmc_core.c
+++ b/drivers/mmc/host/tmio_mmc_core.c
@@ -1160,8 +1160,8 @@ static void tmio_mmc_of_parse(struct platform_device *pdev,
pdata->flags |= TMIO_MMC_WRPROTECT_DISABLE;
}
-struct tmio_mmc_host*
-tmio_mmc_host_alloc(struct platform_device *pdev)
+struct tmio_mmc_host *tmio_mmc_host_alloc(struct platform_device *pdev,
+ struct tmio_mmc_data *pdata)
{
struct tmio_mmc_host *host;
struct mmc_host *mmc;
@@ -1181,9 +1181,12 @@ tmio_mmc_host_alloc(struct platform_device *pdev)
host->ctl = ctl;
host->mmc = mmc;
host->pdev = pdev;
+ host->pdata = pdata;
host->ops = tmio_mmc_ops;
mmc->ops = &host->ops;
+ platform_set_drvdata(pdev, host);
+
return host;
}
EXPORT_SYMBOL_GPL(tmio_mmc_host_alloc);
@@ -1195,13 +1198,20 @@ void tmio_mmc_host_free(struct tmio_mmc_host *host)
EXPORT_SYMBOL_GPL(tmio_mmc_host_free);
int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
- struct tmio_mmc_data *pdata,
const struct tmio_mmc_dma_ops *dma_ops)
{
struct platform_device *pdev = _host->pdev;
+ struct tmio_mmc_data *pdata = _host->pdata;
struct mmc_host *mmc = _host->mmc;
int ret;
+ /*
+ * Check the sanity of mmc->f_min to prevent tmio_mmc_set_clock() from
+ * looping forever...
+ */
+ if (mmc->f_min == 0)
+ return -EINVAL;
+
tmio_mmc_of_parse(pdev, pdata);
if (!(pdata->flags & TMIO_MMC_HAS_IDLE_WAIT))
@@ -1211,9 +1221,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
if (ret < 0)
return ret;
- _host->pdata = pdata;
- platform_set_drvdata(pdev, _host);
-
_host->set_pwr = pdata->set_pwr;
_host->set_clk_div = pdata->set_clk_div;
@@ -1261,18 +1268,6 @@ int tmio_mmc_host_probe(struct tmio_mmc_host *_host,
if (pdata->flags & TMIO_MMC_MIN_RCAR2)
_host->native_hotplug = true;
- if (tmio_mmc_clk_enable(_host) < 0) {
- mmc->f_max = pdata->hclk;
- mmc->f_min = mmc->f_max / 512;
- }
-
- /*
- * Check the sanity of mmc->f_min to prevent tmio_mmc_set_clock() from
- * looping forever...
- */
- if (mmc->f_min == 0)
- return -EINVAL;
-
/*
* While using internal tmio hardware logic for card detection, we need
* to ensure it stays powered for it to work.
@@ -1344,8 +1339,6 @@ void tmio_mmc_host_remove(struct tmio_mmc_host *host)
pm_runtime_put_sync(&pdev->dev);
pm_runtime_disable(&pdev->dev);
-
- tmio_mmc_clk_disable(host);
}
EXPORT_SYMBOL_GPL(tmio_mmc_host_remove);
--
2.7.4