From: Haibo Chen <haibo.chen@xxxxxxx>
Add a method to enable/disable auto-tuning function. auto-tuning function
is conflict with sdio interrupt. For sdio device with sdio interrupt,
need to disable auto-tuning function.
Signed-off-by: Haibo Chen <haibo.chen@xxxxxxx>
---
drivers/mmc/host/sdhci-esdhc-imx.c | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index f18d169bc8ff..3af6519c561b 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -226,6 +226,7 @@ struct esdhc_platform_data {
unsigned int tuning_step; /* The delay cell steps in tuning procedure */
unsigned int tuning_start_tap; /* The start delay cell point in tuning procedure */
unsigned int strobe_dll_delay_target; /* The delay cell for strobe pad (read clock) */
+ bool broken_auto_tuning; /* Disable the auto tuning circuit */
};
struct esdhc_soc_data {
@@ -672,8 +673,10 @@ static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg)
if (val & SDHCI_CTRL_EXEC_TUNING) {
v |= ESDHC_MIX_CTRL_EXE_TUNE;
m |= ESDHC_MIX_CTRL_FBCLK_SEL;
- m |= ESDHC_MIX_CTRL_AUTO_TUNE_EN;
- usdhc_auto_tuning_mode_sel(host);
+ if (!imx_data->boarddata.broken_auto_tuning) {
+ usdhc_auto_tuning_mode_sel(host);
+ m |= ESDHC_MIX_CTRL_AUTO_TUNE_EN;
+ }
} else {
v &= ~ESDHC_MIX_CTRL_EXE_TUNE;
}
@@ -1041,13 +1044,16 @@ static void esdhc_prepare_tuning(struct sdhci_host *host, u32 val)
static void esdhc_post_tuning(struct sdhci_host *host)
{
+ struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
+ struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
u32 reg;
- usdhc_auto_tuning_mode_sel(host);
-
reg = readl(host->ioaddr + ESDHC_MIX_CTRL);
reg &= ~ESDHC_MIX_CTRL_EXE_TUNE;
- reg |= ESDHC_MIX_CTRL_AUTO_TUNE_EN;
+ if (!imx_data->boarddata.broken_auto_tuning) {
+ usdhc_auto_tuning_mode_sel(host);
+ reg |= ESDHC_MIX_CTRL_AUTO_TUNE_EN;
+ }
writel(reg, host->ioaddr + ESDHC_MIX_CTRL);
}
@@ -1522,7 +1528,8 @@ sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
of_property_read_u32(np, "fsl,tuning-step", &boarddata->tuning_step);
of_property_read_u32(np, "fsl,tuning-start-tap",
&boarddata->tuning_start_tap);
-
+ if (of_property_read_bool(np, "fsl,broken-auto-tuning"))
+ boarddata->broken_auto_tuning = true;
of_property_read_u32(np, "fsl,strobe-dll-delay-target",
&boarddata->strobe_dll_delay_target);
if (of_find_property(np, "no-1-8-v", NULL))
--
2.17.1
