diff options
| author | Haibo Chen <haibo.chen@nxp.com> | 2016-09-06 13:10:26 +0800 |
|---|---|---|
| committer | Jason Liu <jason.hui.liu@nxp.com> | 2019-02-12 10:24:56 +0800 |
| commit | c093b2c2cc676d67112fc572dd89b650ff8ef10b (patch) | |
| tree | 428beb1c47b2f2631da8426692e71aea10df89d1 /drivers/mmc/host/sdhci-esdhc-imx.c | |
| parent | 579e7cc98ac7fb6a008f83bf67f3b39abd16b816 (diff) | |
MLK-13188-1 mmc: sdhci-esdhc-imx: add SD clock limit for imx6ull
i.MX6ULL has errata ERR010450, which says due to SOC I/O timing
limit, eMMC HS200 and SD/SDIO 3.0 SDR104 at 1.8v can only work
below or equal to 150MHz. And eMMC DDR52 and SD/SDIO DDR50 at
1.8v can only work below or equal to 45MHz.
This patch add this limit for imx6ull.
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Diffstat (limited to 'drivers/mmc/host/sdhci-esdhc-imx.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-esdhc-imx.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index 605eb4f3e9e8..c8e2962e1852 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -143,6 +143,12 @@ /* The IP state got lost in low power mode */ #define ESDHC_FLAG_STATE_LOST_IN_LPMODE BIT(10) +/* The IP has errata ERR010450 + * uSDHC: Due to the I/O timing limit, for SDR mode, SD card clock can't + * exceed 150MHz, for DDR mode, SD card clock can't exceed 45MHz. + */ +#define ESDHC_FLAG_ERR010450 BIT(11) + /* A clock frequency higher than this rate requires strobe dll control */ #define ESDHC_STROBE_DLL_CLK_FREQ 100000000 @@ -195,6 +201,13 @@ static struct esdhc_soc_data usdhc_imx6sx_data = { | ESDHC_FLAG_STATE_LOST_IN_LPMODE, }; +static struct esdhc_soc_data usdhc_imx6ull_data = { + .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING + | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 + | ESDHC_FLAG_STATE_LOST_IN_LPMODE + | ESDHC_FLAG_ERR010450, +}; + static struct esdhc_soc_data usdhc_imx7d_data = { .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200 @@ -244,6 +257,7 @@ static const struct of_device_id imx_esdhc_dt_ids[] = { { .compatible = "fsl,imx6sx-usdhc", .data = &usdhc_imx6sx_data, }, { .compatible = "fsl,imx6sl-usdhc", .data = &usdhc_imx6sl_data, }, { .compatible = "fsl,imx6q-usdhc", .data = &usdhc_imx6q_data, }, + { .compatible = "fsl,imx6ull-usdhc", .data = &usdhc_imx6ull_data, }, { .compatible = "fsl,imx7d-usdhc", .data = &usdhc_imx7d_data, }, { /* sentinel */ } }; @@ -741,6 +755,13 @@ static inline void esdhc_pltfm_set_clock(struct sdhci_host *host, | ESDHC_CLOCK_MASK); sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL); + if (imx_data->socdata->flags & ESDHC_FLAG_ERR010450) { + if (imx_data->is_ddr) + clock = clock > 45000000 ? 45000000 : clock; + else + clock = clock > 150000000 ? 150000000 : clock; + } + while (host_clock / (16 * pre_div * ddr_pre_div) > clock && pre_div < 256) pre_div *= 2; |