lkml.org 
[lkml]   [2018]   [Jun]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 11/19] mmc: mmci: add variant property to check specific data constraint
Date
From: Ludovic Barre <ludovic.barre@st.com>

This patch adds a function pointer to check specific data constraint
follow hardware variant. Needed to support the STM32 sdmmc variant
which has alignment constraint.

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
---
drivers/mmc/host/mmci.c | 5 +++++
drivers/mmc/host/mmci.h | 2 ++
2 files changed, 7 insertions(+)

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index abddad7..9c00804 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -312,6 +312,8 @@ static int mmci_card_busy(struct mmc_host *mmc)
static int mmci_validate_data(struct mmci_host *host,
struct mmc_data *data)
{
+ struct variant_data *variant = host->variant;
+
if (!data)
return 0;

@@ -321,6 +323,9 @@ static int mmci_validate_data(struct mmci_host *host,
return -EINVAL;
}

+ if (variant->validate_data)
+ return variant->validate_data(host, data);
+
return 0;
}

diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index 12ee2e6..30d3f53 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -284,6 +284,7 @@ struct mmci_host;
* register.
* @opendrain: bitmask identifying the OPENDRAIN bit inside MMCIPOWER register
* @mmci_dma: Pointer to platform-specific DMA callbacks.
+ * @validate_data: if hardware block has specific constraint on validate data
* @set_clk_ios: if clock procedure of variant is specific
* @set_pwr_ios: if power procedure of variant is specific
*/
@@ -328,6 +329,7 @@ struct variant_data {
u32 start_err;
u32 opendrain;
struct mmci_dma_ops *mmci_dma;
+ int (*validate_data)(struct mmci_host *host, struct mmc_data *data);
void (*set_clkreg)(struct mmci_host *host, unsigned int desired);
void (*set_pwrreg)(struct mmci_host *host, unsigned char power_mode,
unsigned int pwr);
--
2.7.4
\
 
 \ /
  Last update: 2018-06-12 15:19    [W:0.062 / U:9.596 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site