diff options
| author | Heiko Schocher <hs@denx.de> | 2014-07-18 06:07:20 +0200 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2014-07-23 12:25:42 +0200 |
| commit | a0ae0091d783b1140f8d321d8c6d221aeb0d39d0 (patch) | |
| tree | e6197115bbf6c6c78f5a60d460661fa0d39a131a | |
| parent | b2f97cf279c54c51741539455116ec3393a871ea (diff) | |
i.MX6: add enable_spi_clk()
add enable_spi_clk(), so board code can enable spi clocks.
Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
Cc: Eric Nelson <eric.nelson@boundarydevices.com>
Cc: Stefano Babic <sbabic@denx.de>
| -rw-r--r-- | arch/arm/cpu/armv7/mx6/clock.c | 18 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-mx6/clock.h | 1 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-mx6/imx-regs.h | 1 |
3 files changed, 20 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c index e1fb5abdeae..abd9d619dc9 100644 --- a/arch/arm/cpu/armv7/mx6/clock.c +++ b/arch/arm/cpu/armv7/mx6/clock.c @@ -71,6 +71,24 @@ int enable_i2c_clk(unsigned char enable, unsigned i2c_num) } #endif +/* spi_num can be from 0 - SPI_MAX_NUM */ +int enable_spi_clk(unsigned char enable, unsigned spi_num) +{ + u32 reg; + u32 mask; + + if (spi_num > SPI_MAX_NUM) + return -EINVAL; + + mask = MXC_CCM_CCGR_CG_MASK << (spi_num << 1); + reg = __raw_readl(&imx_ccm->CCGR1); + if (enable) + reg |= mask; + else + reg &= ~mask; + __raw_writel(reg, &imx_ccm->CCGR1); + return 0; +} static u32 decode_pll(enum pll_clocks pll, u32 infreq) { u32 div; diff --git a/arch/arm/include/asm/arch-mx6/clock.h b/arch/arm/include/asm/arch-mx6/clock.h index 1b4ded7feba..339c789110f 100644 --- a/arch/arm/include/asm/arch-mx6/clock.h +++ b/arch/arm/include/asm/arch-mx6/clock.h @@ -57,6 +57,7 @@ void enable_usboh3_clk(unsigned char enable); int enable_sata_clock(void); int enable_pcie_clock(void); int enable_i2c_clk(unsigned char enable, unsigned i2c_num); +int enable_spi_clk(unsigned char enable, unsigned spi_num); void enable_ipu_clock(void); int enable_fec_anatop_clock(enum enet_freq freq); #endif /* __ASM_ARCH_CLOCK_H */ diff --git a/arch/arm/include/asm/arch-mx6/imx-regs.h b/arch/arm/include/asm/arch-mx6/imx-regs.h index 6c0a0d98dd3..437b434b1aa 100644 --- a/arch/arm/include/asm/arch-mx6/imx-regs.h +++ b/arch/arm/include/asm/arch-mx6/imx-regs.h @@ -505,6 +505,7 @@ struct cspi_regs { #define MXC_CSPICTRL_RXOVF (1 << 6) #define MXC_CSPIPERIOD_32KHZ (1 << 15) #define MAX_SPI_BYTES 32 +#define SPI_MAX_NUM 4 /* Bit position inside CTRL register to be associated with SS */ #define MXC_CSPICTRL_CHAN 18 |