diff options
| author | Stefan Roese <sr@denx.de> | 2014-11-07 13:50:30 +0100 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2014-11-07 16:09:10 +0100 |
| commit | a877bec3ecd7961211a59b2c130e055e0f771976 (patch) | |
| tree | b4a94f10ecdcb027435a470c2c6232d9825ac39e /arch | |
| parent | d2bb937db911b19ed38dd4e5a30b5bf4f2e5a951 (diff) | |
arm: socfpga: Add socfpga_spim_enable() to reset_manager.c
This function will be needed by the upcoming Designware master SPI
driver. As the SPI master controller is held in reset by the current
Preloader implementation. So we need to release the reset for the
driver to communicate with the controller.
This function is called from arch_early_init_r() if the SPI
driver is enabled.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Chin Liang See <clsee@altera.com>
Cc: Dinh Nguyen <dinguyen@altera.com>
Cc: Vince Bridgers <vbridger@altera.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Pavel Machek <pavel@denx.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/cpu/armv7/socfpga/misc.c | 6 | ||||
| -rw-r--r-- | arch/arm/cpu/armv7/socfpga/reset_manager.c | 9 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-socfpga/reset_manager.h | 3 |
3 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/socfpga/misc.c b/arch/arm/cpu/armv7/socfpga/misc.c index 8c3e5f7cd4..73cffd3a8d 100644 --- a/arch/arm/cpu/armv7/socfpga/misc.c +++ b/arch/arm/cpu/armv7/socfpga/misc.c @@ -202,6 +202,12 @@ int arch_early_init_r(void) /* Add device descriptor to FPGA device table */ socfpga_fpga_add(); + +#ifdef CONFIG_DESIGNWARE_SPI + /* Get Designware SPI controller out of reset */ + socfpga_spim_enable(); +#endif + return 0; } diff --git a/arch/arm/cpu/armv7/socfpga/reset_manager.c b/arch/arm/cpu/armv7/socfpga/reset_manager.c index 1d3a95d0c8..af9db850fe 100644 --- a/arch/arm/cpu/armv7/socfpga/reset_manager.c +++ b/arch/arm/cpu/armv7/socfpga/reset_manager.c @@ -104,3 +104,12 @@ void socfpga_emac_reset(int enable) #endif } } + +/* SPI Master enable (its held in reset by the preloader) */ +void socfpga_spim_enable(void) +{ + const void *reset = &reset_manager_base->per_mod_reset; + + clrbits_le32(reset, 1 << RSTMGR_PERMODRST_SPIM0_LSB); + clrbits_le32(reset, 1 << RSTMGR_PERMODRST_SPIM1_LSB); +} diff --git a/arch/arm/include/asm/arch-socfpga/reset_manager.h b/arch/arm/include/asm/arch-socfpga/reset_manager.h index 1857b80b3e..034135bff4 100644 --- a/arch/arm/include/asm/arch-socfpga/reset_manager.h +++ b/arch/arm/include/asm/arch-socfpga/reset_manager.h @@ -14,6 +14,7 @@ void socfpga_bridges_reset(int enable); void socfpga_emac_reset(int enable); void socfpga_watchdog_reset(void); +void socfpga_spim_enable(void); struct socfpga_reset_manager { u32 status; @@ -35,5 +36,7 @@ struct socfpga_reset_manager { #define RSTMGR_PERMODRST_EMAC0_LSB 0 #define RSTMGR_PERMODRST_EMAC1_LSB 1 #define RSTMGR_PERMODRST_L4WD0_LSB 6 +#define RSTMGR_PERMODRST_SPIM0_LSB 18 +#define RSTMGR_PERMODRST_SPIM1_LSB 19 #endif /* _RESET_MANAGER_H_ */ |