[U-Boot] [PATCH v4 04/15] mmc: sdhci: Add support for sdhci-caps-mask
Faiz Abbas
faiz_abbas at ti.com
Thu May 23 17:37:41 UTC 2019
Add Support for masking some bits in the capabilities
register of a host controller.
Also remove the redundant readl() into caps1.
Signed-off-by: Faiz Abbas <faiz_abbas at ti.com>
Reviewed-by: Tom Rini <trini at konsulko.com>
---
drivers/mmc/sdhci.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index e2bb90abbd..fa6bb0a944 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -8,6 +8,7 @@
*/
#include <common.h>
+#include <dm.h>
#include <errno.h>
#include <malloc.h>
#include <mmc.h>
@@ -643,8 +644,15 @@ int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host,
u32 f_max, u32 f_min)
{
u32 caps, caps_1 = 0;
+ u32 mask[2] = {0};
+ int ret;
+
+ ret = dev_read_u32_array(host->mmc->dev, "sdhci-caps-mask",
+ mask, 2);
+ if (ret && ret != -1)
+ return ret;
- caps = sdhci_readl(host, SDHCI_CAPABILITIES);
+ caps = ~mask[1] & sdhci_readl(host, SDHCI_CAPABILITIES);
#ifdef CONFIG_MMC_SDHCI_SDMA
if (!(caps & SDHCI_CAN_DO_SDMA)) {
@@ -684,7 +692,7 @@ int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host,
/* Check whether the clock multiplier is supported or not */
if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) {
- caps_1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
+ caps_1 = ~mask[0] & sdhci_readl(host, SDHCI_CAPABILITIES_1);
host->clk_mul = (caps_1 & SDHCI_CLOCK_MUL_MASK) >>
SDHCI_CLOCK_MUL_SHIFT;
}
@@ -741,9 +749,6 @@ int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host,
cfg->host_caps &= ~MMC_MODE_HS_52MHz;
}
- if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300)
- caps_1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
-
if (!(cfg->voltages & MMC_VDD_165_195) ||
(host->quirks & SDHCI_QUIRK_NO_1_8_V))
caps_1 &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
--
2.17.1
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