Most of silicon errata about the eSDHC need to be identified through
the SoC version/revision. This patch makes the driver get these
information from SVR(system version register) of global utilities
registers.
Signed-off-by: Yangbo Lu <yangbo.lu@xxxxxxxxxxxxx>
---
Changes for v2:
- Got SVR through iomap instead of dts
Changes for v3:
- Managed GUTS through syscon instead of iomap in eSDHC driver
---
drivers/mmc/host/sdhci-of-esdhc.c | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index 83b1226..fce24b7 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -19,6 +19,9 @@
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/mmc/host.h>
+#include <linux/mfd/syscon.h>
+#include <linux/regmap.h>
+#include <linux/fsl-svr.h>
#include "sdhci-pltfm.h"
#include "sdhci-esdhc.h"
@@ -28,6 +31,8 @@
struct sdhci_esdhc {
u8 vendor_ver;
u8 spec_ver;
+ u32 soc_ver;
+ u8 soc_rev;
};
/**
@@ -566,18 +571,28 @@ static void esdhc_init(struct platform_device *pdev, struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host;
struct sdhci_esdhc *esdhc;
+ struct regmap *guts_regmap;
+ u32 svr;
u16 host_ver;
pltfm_host = sdhci_priv(host);
esdhc = devm_kzalloc(&pdev->dev, sizeof(struct sdhci_esdhc),
GFP_KERNEL);
+ pltfm_host->priv = esdhc;
+
+ guts_regmap = syscon_regmap_lookup_by_compatible("syscon");
+ if (IS_ERR(guts_regmap)) {
+ dev_err(&pdev->dev, "unable to find global utilities registers\n");
+ } else {
+ regmap_read(guts_regmap, SVR_OFFSET, &svr);
+ esdhc->soc_ver = SVR_SOC_VER(svr);
+ esdhc->soc_rev = SVR_REV(svr);
+ }
host_ver = sdhci_readw(host, SDHCI_HOST_VERSION);
esdhc->vendor_ver = (host_ver & SDHCI_VENDOR_VER_MASK) >>
SDHCI_VENDOR_VER_SHIFT;
esdhc->spec_ver = host_ver & SDHCI_SPEC_VER_MASK;
-
- pltfm_host->priv = esdhc;
}
static int sdhci_esdhc_probe(struct platform_device *pdev)
--
2.1.0.27.g96db324
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
