diff options
| author | Jun Nie <jun.nie@linaro.org> | 2017-01-11 07:35:35 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2017-02-13 13:20:02 +0100 |
| commit | a0361c1a4d265ea36796149a29b48e41a5ba28d9 (patch) | |
| tree | ee14b7c6a2add1875984fd44ea10816efd2f9d37 | |
| parent | Documentation: synopsys-dw-mshc: add binding for fifo quirks (diff) | |
| download | linux-a0361c1a4d265ea36796149a29b48e41a5ba28d9.tar.xz linux-a0361c1a4d265ea36796149a29b48e41a5ba28d9.zip | |
mmc: dw_mmc: Add fifo address property
The FIFO address may break default address assumption of 0x100
(version < 0x240A) and 0x200(version >= 0x240A) in current driver.
The new property is introduced to override fifo address via DT
node information.
Signed-off-by: Jun Nie <jun.nie@linaro.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/mmc/host/dw_mmc.c | 6 | ||||
| -rw-r--r-- | drivers/mmc/host/dw_mmc.h | 2 |
2 files changed, 7 insertions, 1 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 2d8932a20161..94d8fe321260 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -2976,6 +2976,8 @@ static struct dw_mci_board *dw_mci_parse_dt(struct dw_mci *host) of_property_read_u32(np, "card-detect-delay", &pdata->detect_delay_ms); + of_property_read_u32(np, "data-addr", &host->data_addr_override); + if (!of_property_read_u32(np, "clock-frequency", &clock_frequency)) pdata->bus_hz = clock_frequency; @@ -3179,7 +3181,9 @@ int dw_mci_probe(struct dw_mci *host) host->verid = SDMMC_GET_VERID(mci_readl(host, VERID)); dev_info(host->dev, "Version ID is %04x\n", host->verid); - if (host->verid < DW_MMC_240A) + if (host->data_addr_override) + host->fifo_reg = host->regs + host->data_addr_override; + else if (host->verid < DW_MMC_240A) host->fifo_reg = host->regs + DATA_OFFSET; else host->fifo_reg = host->regs + DATA_240A_OFFSET; diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h index 231a46f142d2..e08e3272a5ad 100644 --- a/drivers/mmc/host/dw_mmc.h +++ b/drivers/mmc/host/dw_mmc.h @@ -114,6 +114,7 @@ struct dw_mci_dma_slave { * @ciu_clk: Pointer to card interface unit clock instance. * @slot: Slots sharing this MMC controller. * @fifo_depth: depth of FIFO. + * @data_addr_override: override fifo reg offset with this value. * @data_shift: log2 of FIFO item size. * @part_buf_start: Start index in part_buf. * @part_buf_count: Bytes of partial data in part_buf. @@ -161,6 +162,7 @@ struct dw_mci { spinlock_t irq_lock; void __iomem *regs; void __iomem *fifo_reg; + u32 data_addr_override; struct scatterlist *sg; struct sg_mapping_iter sg_miter; |