1.add support for probing mmc driver on the JZ4760 Soc from Ingenic. 2.add support for Low Power Mode of Ingenic's MMC/SD Controller.
Signed-off-by: Zhou Yanjie <[email protected]> --- drivers/mmc/host/jz4740_mmc.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/mmc/host/jz4740_mmc.c b/drivers/mmc/host/jz4740_mmc.c index d6811a7..1e61f1b 100644 --- a/drivers/mmc/host/jz4740_mmc.c +++ b/drivers/mmc/host/jz4740_mmc.c @@ -43,6 +43,7 @@ #define JZ_REG_MMC_RES 0x34 #define JZ_REG_MMC_RXFIFO 0x38 #define JZ_REG_MMC_TXFIFO 0x3C +#define JZ_REG_MMC_LPM 0x40 #define JZ_REG_MMC_DMAC 0x44 #define JZ_MMC_STRPCL_EXIT_MULTIPLE BIT(7) @@ -102,11 +103,15 @@ #define JZ_MMC_DMAC_DMA_SEL BIT(1) #define JZ_MMC_DMAC_DMA_EN BIT(0) +#define JZ_MMC_LPM_DRV_RISING BIT(31) +#define JZ_MMC_LPM_LOW_POWER_MODE_EN BIT(0) + #define JZ_MMC_CLK_RATE 24000000 enum jz4740_mmc_version { JZ_MMC_JZ4740, JZ_MMC_JZ4725B, + JZ_MMC_JZ4760, JZ_MMC_JZ4780, }; @@ -858,6 +863,16 @@ static int jz4740_mmc_set_clock_rate(struct jz4740_mmc_host *host, int rate) } writew(div, host->base + JZ_REG_MMC_CLKRT); + + if (host->version >= JZ_MMC_JZ4760) { + if (real_rate > 25000000) + writel(JZ_MMC_LPM_DRV_RISING | + JZ_MMC_LPM_LOW_POWER_MODE_EN, + host->base + JZ_REG_MMC_LPM); + } else if (host->version >= JZ_MMC_JZ4725B) + writel(JZ_MMC_LPM_LOW_POWER_MODE_EN, + host->base + JZ_REG_MMC_LPM); + return real_rate; } @@ -935,6 +950,7 @@ static const struct mmc_host_ops jz4740_mmc_ops = { static const struct of_device_id jz4740_mmc_of_match[] = { { .compatible = "ingenic,jz4740-mmc", .data = (void *) JZ_MMC_JZ4740 }, { .compatible = "ingenic,jz4725b-mmc", .data = (void *)JZ_MMC_JZ4725B }, + { .compatible = "ingenic,jz4760-mmc", .data = (void *) JZ_MMC_JZ4760 }, { .compatible = "ingenic,jz4780-mmc", .data = (void *) JZ_MMC_JZ4780 }, {}, }; -- 2.7.4
