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| author | Emmanuel Vadot <manu@FreeBSD.org> | 2021-05-16 14:18:46 +0000 |
|---|---|---|
| committer | Emmanuel Vadot <manu@FreeBSD.org> | 2021-07-22 17:09:41 +0000 |
| commit | 19ccda09deb783cefcc06346ac7e1d34ebb8f8ec (patch) | |
| tree | 72dacf9efd9b8f460c190f1d470daa24b8d09bb3 | |
| parent | ee2a2639749fd42de2b4bf19d4784948a6d1fca5 (diff) | |
| download | src-19ccda09deb783cefcc06346ac7e1d34ebb8f8ec.tar.gz src-19ccda09deb783cefcc06346ac7e1d34ebb8f8ec.zip | |
mmc_fdt_helper: Add mmc_fdt_set_power
This helper can be used to enable/disable the regulator and starting
the power sequence of sd/sdio/eMMC cards.
Sponsored by: Diablotin Systems
Differential Revision: https://reviews.freebsd.org/D30291
(cherry picked from commit 03d4e8bb6592fefab7b17f1d163adba4e35a12c2)
| -rw-r--r-- | sys/dev/mmc/mmc_fdt_helpers.c | 42 | ||||
| -rw-r--r-- | sys/dev/mmc/mmc_fdt_helpers.h | 1 |
2 files changed, 43 insertions, 0 deletions
diff --git a/sys/dev/mmc/mmc_fdt_helpers.c b/sys/dev/mmc/mmc_fdt_helpers.c index e544f3c4ac08..4e8a1730d240 100644 --- a/sys/dev/mmc/mmc_fdt_helpers.c +++ b/sys/dev/mmc/mmc_fdt_helpers.c @@ -45,6 +45,8 @@ __FBSDID("$FreeBSD$"); #include <dev/extres/regulator/regulator.h> #endif +#include "mmc_pwrseq_if.h" + static inline void mmc_fdt_parse_sd_speed(phandle_t node, struct mmc_host *host) { @@ -423,3 +425,43 @@ mmc_fdt_gpio_get_readonly(struct mmc_fdt_helper *helper) return (pinstate ^ (helper->props & MMC_PROP_WP_INVERTED)); } + +void +mmc_fdt_set_power(struct mmc_fdt_helper *helper, enum mmc_power_mode power_mode) +{ + int reg_status; + int rv; + + switch (power_mode) { + case power_on: + break; + case power_off: + if (helper->vmmc_supply) { + rv = regulator_status(helper->vmmc_supply, ®_status); + if (rv == 0 && reg_status == REGULATOR_STATUS_ENABLED) + regulator_disable(helper->vmmc_supply); + } + if (helper->vqmmc_supply) { + rv = regulator_status(helper->vqmmc_supply, ®_status); + if (rv == 0 && reg_status == REGULATOR_STATUS_ENABLED) + regulator_disable(helper->vqmmc_supply); + } + if (helper->mmc_pwrseq) + MMC_PWRSEQ_SET_POWER(helper->mmc_pwrseq, false); + break; + case power_up: + if (helper->vmmc_supply) { + rv = regulator_status(helper->vmmc_supply, ®_status); + if (rv == 0 && reg_status != REGULATOR_STATUS_ENABLED) + regulator_enable(helper->vmmc_supply); + } + if (helper->vqmmc_supply) { + rv = regulator_status(helper->vqmmc_supply, ®_status); + if (rv == 0 && reg_status != REGULATOR_STATUS_ENABLED) + regulator_enable(helper->vqmmc_supply); + } + if (helper->mmc_pwrseq) + MMC_PWRSEQ_SET_POWER(helper->mmc_pwrseq, true); + break; + } +} diff --git a/sys/dev/mmc/mmc_fdt_helpers.h b/sys/dev/mmc/mmc_fdt_helpers.h index c6e2175690ee..e6d6f3fbfd84 100644 --- a/sys/dev/mmc/mmc_fdt_helpers.h +++ b/sys/dev/mmc/mmc_fdt_helpers.h @@ -74,5 +74,6 @@ int mmc_fdt_gpio_setup(device_t dev, phandle_t node, struct mmc_fdt_helper *help void mmc_fdt_gpio_teardown(struct mmc_fdt_helper *helper); bool mmc_fdt_gpio_get_present(struct mmc_fdt_helper *helper); bool mmc_fdt_gpio_get_readonly(struct mmc_fdt_helper *helper); +void mmc_fdt_set_power(struct mmc_fdt_helper *helper, enum mmc_power_mode power_mode); #endif |