From: yinbo.zhu <yinbo.zhu@xxxxxxx>
Convert to use soc_device_match method to fix up eSDHC clock for
ls1046a/ls1012a/p1010. Also add eSDHC clock fixup for ls1021a
according to its datasheet. The maxmum speed for ls1021a eSDHC
high speed mode is 46.5MHz.
Signed-off-by: Yinbo Zhu <yinbo.zhu@xxxxxxx>
---
drivers/mmc/host/sdhci-of-esdhc.c | 105 ++++++++++++++++++++++++++++++-------
1 files changed, 85 insertions(+), 20 deletions(-)
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index 4ffa6b1..4d82c6d 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -29,11 +29,58 @@
#define VENDOR_V_22 0x12
#define VENDOR_V_23 0x13
+struct esdhc_clk_fixup {
+ /* SD speed modes */
+ long ds;
+ long hs;
+ long sdr12;
+ long sdr25;
+ long sdr50;
+ long sdr104;
+ long ddr50;
+ /* MMC speed modes */
+ long mmc_ds;
+ long mmc_hs;
+ long hs200;
+ long ddr52;
+};
+
+static struct esdhc_clk_fixup ls1021a_esdhc_clk = {
+ .mmc_hs = 46500000,
+ .hs = 46500000,
+};
+
+static struct esdhc_clk_fixup ls1046a_esdhc_clk = {
+ .sdr104 = 167000000,
+ .hs200 = 167000000,
+};
+
+static struct esdhc_clk_fixup ls1012a_esdhc_clk = {
+ .sdr104 = 125000000,
+ .hs200 = 125000000,
+};
+
+static struct esdhc_clk_fixup p1010_esdhc_clk = {
+ .ds = 20000000,
+ .hs = 40000000,
+ .mmc_ds = 20000000,
+ .mmc_hs = 42000000,
+};
+
+static struct soc_device_attribute soc_esdhc_clk_fixup[] = {
+ { .family = "QorIQ LS1021A", .data = &ls1021a_esdhc_clk},
+ { .family = "QorIQ LS1046A", .data = &ls1046a_esdhc_clk},
+ { .family = "QorIQ LS1012A", .data = &ls1012a_esdhc_clk},
+ { .family = "QorIQ P1010", .data = &p1010_esdhc_clk},
+ {},
+};
+
struct sdhci_esdhc {
u8 vendor_ver;
u8 spec_ver;
bool quirk_incorrect_hostver;
unsigned int peripheral_clock;
+ const struct esdhc_clk_fixup *clk_fixup;
};
/**
@@ -485,6 +532,14 @@ static void esdhc_clock_enable(struct sdhci_host *host, bool enable)
}
}
+static long esdhc_clock_fixup(long clock, long clock_standard, long fixup)
+{
+ if (!fixup)
+ return clock;
+
+ return (clock == clock_standard) ? fixup : clock;
+}
+
static void esdhc_of_set_clock(struct sdhci_host *host, unsigned int clock)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
@@ -492,6 +547,7 @@ static void esdhc_of_set_clock(struct sdhci_host *host, unsigned int clock)
int pre_div = 1;
int div = 1;
ktime_t timeout;
+ long fixup;
u32 temp;
host->mmc->actual_clock = 0;
@@ -505,26 +561,31 @@ static void esdhc_of_set_clock(struct sdhci_host *host, unsigned int clock)
if (esdhc->vendor_ver < VENDOR_V_23)
pre_div = 2;
- /*
- * Limit SD clock to 167MHz for ls1046a according to its datasheet
- */
- if (clock > 167000000 &&
- of_find_compatible_node(NULL, NULL, "fsl,ls1046a-esdhc"))
- clock = 167000000;
-
- /*
- * Limit SD clock to 125MHz for ls1012a according to its datasheet
- */
- if (clock > 125000000 &&
- of_find_compatible_node(NULL, NULL, "fsl,ls1012a-esdhc"))
- clock = 125000000;
-
- /* Workaround to reduce the clock frequency for p1010 esdhc */
- if (of_find_compatible_node(NULL, NULL, "fsl,p1010-esdhc")) {
- if (clock > 20000000)
- clock -= 5000000;
- if (clock > 40000000)
- clock -= 5000000;
+ switch (host->mmc->ios.timing) {
+ case MMC_TIMING_LEGACY:
+ fixup = esdhc->clk_fixup->ds;
+ clock = esdhc_clock_fixup(clock, FULL_SPEED_MAX_DTR, fixup);
+ fixup = esdhc->clk_fixup->mmc_ds;
+ clock = esdhc_clock_fixup(clock, MMC_HIGH_26_MAX_DTR, fixup);
+ break;
+ case MMC_TIMING_SD_HS:
+ fixup = esdhc->clk_fixup->hs;
+ clock = esdhc_clock_fixup(clock, HIGH_SPEED_MAX_DTR, fixup);
+ break;
+ case MMC_TIMING_MMC_HS:
+ fixup = esdhc->clk_fixup->mmc_hs;
+ clock = esdhc_clock_fixup(clock, MMC_HIGH_52_MAX_DTR, fixup);
+ break;
+ case MMC_TIMING_UHS_SDR104:
+ fixup = esdhc->clk_fixup->sdr104;
+ clock = esdhc_clock_fixup(clock, UHS_SDR104_MAX_DTR, fixup);
+ break;
+ case MMC_TIMING_MMC_HS200:
+ fixup = esdhc->clk_fixup->hs200;
+ clock = esdhc_clock_fixup(clock, MMC_HS200_MAX_DTR, fixup);
+ break;
+ default:
+ break;
}
temp = sdhci_readl(host, ESDHC_SYSTEM_CONTROL);
@@ -783,6 +844,7 @@ static SIMPLE_DEV_PM_OPS(esdhc_of_dev_pm_ops,
static void esdhc_init(struct platform_device *pdev, struct sdhci_host *host)
{
+ const struct soc_device_attribute *matches;
struct sdhci_pltfm_host *pltfm_host;
struct sdhci_esdhc *esdhc;
struct device_node *np;
@@ -802,6 +864,9 @@ static void esdhc_init(struct platform_device *pdev, struct sdhci_host *host)
else
esdhc->quirk_incorrect_hostver = false;
+ matches = soc_device_match(soc_esdhc_clk_fixup);
+ if (matches)
+ esdhc->clk_fixup = matches->data;
np = pdev->dev.of_node;
clk = of_clk_get(np, 0);
if (!IS_ERR(clk)) {
--
1.7.1
--
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