diff options
Diffstat (limited to 'drivers/mmc/host/dw_mmc-bluefield.c')
| -rw-r--r-- | drivers/mmc/host/dw_mmc-bluefield.c | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/drivers/mmc/host/dw_mmc-bluefield.c b/drivers/mmc/host/dw_mmc-bluefield.c index 4747e5698f48..24e0b604b405 100644 --- a/drivers/mmc/host/dw_mmc-bluefield.c +++ b/drivers/mmc/host/dw_mmc-bluefield.c @@ -3,6 +3,7 @@ * Copyright (C) 2018 Mellanox Technologies. */ +#include <linux/arm-smccc.h> #include <linux/bitfield.h> #include <linux/bitops.h> #include <linux/mmc/host.h> @@ -20,6 +21,9 @@ #define BLUEFIELD_UHS_REG_EXT_SAMPLE 2 #define BLUEFIELD_UHS_REG_EXT_DRIVE 4 +/* SMC call for RST_N */ +#define BLUEFIELD_SMC_SET_EMMC_RST_N 0x82000007 + static void dw_mci_bluefield_set_ios(struct dw_mci *host, struct mmc_ios *ios) { u32 reg; @@ -34,8 +38,20 @@ static void dw_mci_bluefield_set_ios(struct dw_mci *host, struct mmc_ios *ios) mci_writel(host, UHS_REG_EXT, reg); } +static void dw_mci_bluefield_hw_reset(struct dw_mci *host) +{ + struct arm_smccc_res res = { 0 }; + + arm_smccc_smc(BLUEFIELD_SMC_SET_EMMC_RST_N, 0, 0, 0, 0, 0, 0, 0, + &res); + + if (res.a0) + pr_err("RST_N failed.\n"); +} + static const struct dw_mci_drv_data bluefield_drv_data = { - .set_ios = dw_mci_bluefield_set_ios + .set_ios = dw_mci_bluefield_set_ios, + .hw_reset = dw_mci_bluefield_hw_reset }; static const struct of_device_id dw_mci_bluefield_match[] = { |