From: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
Currently it is not possible to use 'mmc-pwrseq-simple' property with this
driver because mmc_of_parse() is never called.
mmc_of_parse() calls mmc_pwrseq_alloc() that manages MMC power sequence and
allows passing GPIOs in the devicetree to properly power/reset the Wifi
chipset.
When using mmc_of_parse() we no longer need to have custom code to request
card-detect and write-protect pins, as this can now be handled by the mmc
core.
Tested on a imx6sl-warp board where BT/Wifi is functional and also on a
imx6q-sabresd.
Signed-off-by: Fabio Estevam <fabio.estevam@xxxxxxxxxxxxx>
---
Change since v2:
- Use mmc_of_parse() and remove custom code to retrieve CD/WP GPIOs.
drivers/mmc/host/sdhci-esdhc-imx.c | 38 ++++++--------------------------------
1 file changed, 6 insertions(+), 32 deletions(-)
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index 7ee8312..82f512d 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -1013,40 +1013,9 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
host->mmc->parent->platform_data);
}
- /* write_protect */
- if (boarddata->wp_type == ESDHC_WP_GPIO) {
- err = mmc_gpio_request_ro(host->mmc, boarddata->wp_gpio);
- if (err) {
- dev_err(mmc_dev(host->mmc),
- "failed to request write-protect gpio!\n");
- goto disable_clk;
- }
- host->mmc->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
- }
-
/* card_detect */
- switch (boarddata->cd_type) {
- case ESDHC_CD_GPIO:
- err = mmc_gpio_request_cd(host->mmc, boarddata->cd_gpio, 0);
- if (err) {
- dev_err(mmc_dev(host->mmc),
- "failed to request card-detect gpio!\n");
- goto disable_clk;
- }
- /* fall through */
-
- case ESDHC_CD_CONTROLLER:
- /* we have a working card_detect back */
+ if (boarddata->cd_type == ESDHC_CD_CONTROLLER)
host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
- break;
-
- case ESDHC_CD_PERMANENT:
- host->mmc->caps |= MMC_CAP_NONREMOVABLE;
- break;
-
- case ESDHC_CD_NONE:
- break;
- }
switch (boarddata->max_bus_width) {
case 8:
@@ -1079,6 +1048,11 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V;
}
+ /* call to generic mmc_of_parse to support additional capabilities */
+ err = mmc_of_parse(host->mmc);
+ if (err)
+ goto disable_clk;
+
err = sdhci_add_host(host);
if (err)
goto disable_clk;
--
1.9.1
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