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authorSrinivas Kandagatla <srinivas.kandagatla@linaro.org>2014-06-02 10:09:23 +0100
committerUlf Hansson <ulf.hansson@linaro.org>2014-07-09 11:25:55 +0200
commite1412d85a8e50d2b22970df29a804477582a6637 (patch)
tree9af97b79cabe70a08fedd2855d88fcaab201a71d /drivers
parente17dca2b2df30676adbbc18a1022884dc73187a5 (diff)
mmc: mmci: add 8bit bus support in variant data
This patch adds 8bit bus enable to variant structure giving more flexibility to the driver to support more SOCs which have different clock register layout. Without this patch other new SOCs like Qcom will have to add more code to special case them. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> [Ulf Hansson] Resolved conflict Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mmc/host/mmci.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 187dae143cc1..2fb893313044 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -52,6 +52,7 @@ static unsigned int fmax = 515633;
* struct variant_data - MMCI variant-specific quirks
* @clkreg: default value for MCICLOCK register
* @clkreg_enable: enable value for MMCICLOCK register
+ * @clkreg_8bit_bus_enable: enable value for 8 bit bus
* @datalength_bits: number of bits in the MMCIDATALENGTH register
* @fifosize: number of bytes that can be written when MMCI_TXFIFOEMPTY
* is asserted (likewise for RX)
@@ -72,6 +73,7 @@ static unsigned int fmax = 515633;
struct variant_data {
unsigned int clkreg;
unsigned int clkreg_enable;
+ unsigned int clkreg_8bit_bus_enable;
unsigned int datalength_bits;
unsigned int fifosize;
unsigned int fifohalfsize;
@@ -113,6 +115,7 @@ static struct variant_data variant_u300 = {
.fifosize = 16 * 4,
.fifohalfsize = 8 * 4,
.clkreg_enable = MCI_ST_U300_HWFCEN,
+ .clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS,
.datalength_bits = 16,
.sdio = true,
.pwrreg_powerup = MCI_PWR_ON,
@@ -139,6 +142,7 @@ static struct variant_data variant_ux500 = {
.fifohalfsize = 8 * 4,
.clkreg = MCI_CLK_ENABLE,
.clkreg_enable = MCI_ST_UX500_HWFCEN,
+ .clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS,
.datalength_bits = 24,
.sdio = true,
.st_clkdiv = true,
@@ -154,6 +158,7 @@ static struct variant_data variant_ux500v2 = {
.fifohalfsize = 8 * 4,
.clkreg = MCI_CLK_ENABLE,
.clkreg_enable = MCI_ST_UX500_HWFCEN,
+ .clkreg_8bit_bus_enable = MCI_ST_8BIT_BUS,
.datactrl_mask_ddrmode = MCI_ST_DPSM_DDRMODE,
.datalength_bits = 24,
.sdio = true,
@@ -305,7 +310,7 @@ static void mmci_set_clkreg(struct mmci_host *host, unsigned int desired)
if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_4)
clk |= MCI_4BIT_BUS;
if (host->mmc->ios.bus_width == MMC_BUS_WIDTH_8)
- clk |= MCI_ST_8BIT_BUS;
+ clk |= variant->clkreg_8bit_bus_enable;
if (host->mmc->ios.timing == MMC_TIMING_UHS_DDR50 ||
host->mmc->ios.timing == MMC_TIMING_MMC_DDR52)

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