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Subject[RFC,PATCH 4/6] mmc: uhs2: Introduce a uhs2_post_attach_sd function
Date
From: Ben Chuang <ben.chuang@genesyslogic.com.tw>

Introduce a uhs2_post_attach_sd function after attach_sd on
UHS-II mode.

Signed-off-by: Ben Chuang <ben.chuang@genesyslogic.com.tw>
---
drivers/mmc/core/uhs2.c | 5 ++++-
drivers/mmc/host/sdhci-core.c | 9 +++++++++
drivers/mmc/host/sdhci.h | 1 +
include/linux/mmc/host.h | 1 +
4 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/mmc/core/uhs2.c b/drivers/mmc/core/uhs2.c
index 43ea155ccc59..99aeeccd88e5 100644
--- a/drivers/mmc/core/uhs2.c
+++ b/drivers/mmc/core/uhs2.c
@@ -935,8 +935,11 @@ int mmc_uhs2_try_frequency(struct mmc_host *host, unsigned int freq)
*/
err = mmc_attach_sd(host, true);

- if (!err)
+ if (!err) {
+ if (host->ops->uhs2_post_attach_sd)
+ host->ops->uhs2_post_attach_sd(host);
return 0;
+ }

init_fail:
mmc_power_off(host);
diff --git a/drivers/mmc/host/sdhci-core.c b/drivers/mmc/host/sdhci-core.c
index 8f396d1de208..7b3e8c978c51 100644
--- a/drivers/mmc/host/sdhci-core.c
+++ b/drivers/mmc/host/sdhci-core.c
@@ -2769,6 +2769,14 @@ void sdhci_uhs2_enable_clk(struct mmc_host *mmc)
}
EXPORT_SYMBOL_GPL(sdhci_uhs2_enable_clk);

+static void sdhci_uhs2_post_attach_sd(struct mmc_host *mmc)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+
+ if (host->ops && host->ops->uhs2_post_attach_sd)
+ host->ops->uhs2_post_attach_sd(host);
+}
+
static const struct mmc_host_ops sdhci_ops = {
.request = sdhci_request,
.post_req = sdhci_post_req,
@@ -2788,6 +2796,7 @@ static const struct mmc_host_ops sdhci_ops = {
.uhs2_set_reg = sdhci_uhs2_set_reg,
.uhs2_disable_clk = sdhci_uhs2_disable_clk,
.uhs2_enable_clk = sdhci_uhs2_enable_clk,
+ .uhs2_post_attach_sd = sdhci_uhs2_post_attach_sd,
};

/*****************************************************************************\
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 48176e9556b7..ea5e2119e1c9 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -904,6 +904,7 @@ struct sdhci_ops {
void (*voltage_switch)(struct sdhci_host *host);
void (*adma_write_desc)(struct sdhci_host *host, void **desc,
dma_addr_t addr, int len, unsigned int cmd);
+ void (*uhs2_post_attach_sd)(struct sdhci_host *host);
};

#ifdef CONFIG_MMC_SDHCI_IO_ACCESSORS
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 3d6a7c9b534f..ed4ebe6bf68a 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -177,6 +177,7 @@ struct mmc_host_ops {
int (*uhs2_set_reg)(struct mmc_host *host, enum uhs2_act act);
void (*uhs2_disable_clk)(struct mmc_host *host);
void (*uhs2_enable_clk)(struct mmc_host *host);
+ void (*uhs2_post_attach_sd)(struct mmc_host *host);
};

struct mmc_cqe_ops {
--
2.24.1
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