From d42f60ffca51c02d7545c465ef488f0d796027e1 Mon Sep 17 00:00:00 2001 From: Li Yang Date: Thu, 25 Nov 2010 17:06:09 +0000 Subject: [PATCH] fsl_esdhc: Fix the voltage validation process The current code use all the voltage range support by the host controller to do the validation. This will cause problem when the host supports Low Voltage Range. Change the validation voltage to be based on board setup. Signed-off-by: Li Yang Tested-by: Stefano Babic Signed-off-by: Kumar Gala --- drivers/mmc/fsl_esdhc.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) diff --git a/drivers/mmc/fsl_esdhc.c b/drivers/mmc/fsl_esdhc.c index 7bab2f66d7..40b136c176 100644 --- a/drivers/mmc/fsl_esdhc.c +++ b/drivers/mmc/fsl_esdhc.c @@ -444,7 +444,7 @@ int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg) { struct fsl_esdhc *regs; struct mmc *mmc; - u32 caps; + u32 caps, voltage_caps; if (!cfg) return -1; @@ -462,14 +462,24 @@ int fsl_esdhc_initialize(bd_t *bis, struct fsl_esdhc_cfg *cfg) mmc->set_ios = esdhc_set_ios; mmc->init = esdhc_init; + voltage_caps = 0; caps = regs->hostcapblt; - if (caps & ESDHC_HOSTCAPBLT_VS18) - mmc->voltages |= MMC_VDD_165_195; + voltage_caps |= MMC_VDD_165_195; if (caps & ESDHC_HOSTCAPBLT_VS30) - mmc->voltages |= MMC_VDD_29_30 | MMC_VDD_30_31; + voltage_caps |= MMC_VDD_29_30 | MMC_VDD_30_31; if (caps & ESDHC_HOSTCAPBLT_VS33) - mmc->voltages |= MMC_VDD_32_33 | MMC_VDD_33_34; + voltage_caps |= MMC_VDD_32_33 | MMC_VDD_33_34; + +#ifdef CONFIG_SYS_SD_VOLTAGE + mmc->voltages = CONFIG_SYS_SD_VOLTAGE; +#else + mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34; +#endif + if ((mmc->voltages & voltage_caps) == 0) { + printf("voltage not supported by controller\n"); + return -1; + } mmc->host_caps = MMC_MODE_4BIT | MMC_MODE_8BIT; -- 2.25.1