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| author | Nikita Kiryanov <nikita@compulab.co.il> | 2014-08-20 15:08:49 +0300 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2014-09-09 15:32:32 +0200 |
| commit | 224beb833e544b802f08765271cec07667d39669 (patch) | |
| tree | 9ba019f09fa31c88fe0ab915ae4690befe3b5c52 /arch/arm/cpu | |
| parent | a7c67d7c496952da0d453f253c27f7f5b591a269 (diff) | |
| download | u-boot-imx-224beb833e544b802f08765271cec07667d39669.zip u-boot-imx-224beb833e544b802f08765271cec07667d39669.tar.gz u-boot-imx-224beb833e544b802f08765271cec07667d39669.tar.bz2 | |
mx6: add clock enabling functions
Add functions to enable/disable clocks for UART, SPI, ENET, and MMC.
Cc: Stefano Babic <sbabic@denx.de>
Cc: Igor Grinberg <grinberg@compulab.co.il>
Acked-by: Igor Grinberg <grinberg@compulab.co.il>
Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
Diffstat (limited to 'arch/arm/cpu')
| -rw-r--r-- | arch/arm/cpu/armv7/mx6/clock.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv7/mx6/clock.c b/arch/arm/cpu/armv7/mx6/clock.c index 820b8d5..a861e65 100644 --- a/arch/arm/cpu/armv7/mx6/clock.c +++ b/arch/arm/cpu/armv7/mx6/clock.c @@ -36,6 +36,35 @@ void enable_ocotp_clk(unsigned char enable) } #endif +#ifdef CONFIG_NAND_MXS +void setup_gpmi_io_clk(u32 cfg) +{ + /* Disable clocks per ERR007177 from MX6 errata */ + clrbits_le32(&imx_ccm->CCGR4, + MXC_CCM_CCGR4_RAWNAND_U_BCH_INPUT_APB_MASK | + MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_BCH_MASK | + MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_GPMI_IO_MASK | + MXC_CCM_CCGR4_RAWNAND_U_GPMI_INPUT_APB_MASK | + MXC_CCM_CCGR4_PL301_MX6QPER1_BCH_MASK); + + clrbits_le32(&imx_ccm->CCGR2, MXC_CCM_CCGR2_IOMUX_IPT_CLK_IO_MASK); + + clrsetbits_le32(&imx_ccm->cs2cdr, + MXC_CCM_CS2CDR_ENFC_CLK_PODF_MASK | + MXC_CCM_CS2CDR_ENFC_CLK_PRED_MASK | + MXC_CCM_CS2CDR_ENFC_CLK_SEL_MASK, + cfg); + + setbits_le32(&imx_ccm->CCGR2, MXC_CCM_CCGR2_IOMUX_IPT_CLK_IO_MASK); + setbits_le32(&imx_ccm->CCGR4, + MXC_CCM_CCGR4_RAWNAND_U_BCH_INPUT_APB_MASK | + MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_BCH_MASK | + MXC_CCM_CCGR4_RAWNAND_U_GPMI_BCH_INPUT_GPMI_IO_MASK | + MXC_CCM_CCGR4_RAWNAND_U_GPMI_INPUT_APB_MASK | + MXC_CCM_CCGR4_PL301_MX6QPER1_BCH_MASK); +} +#endif + void enable_usboh3_clk(unsigned char enable) { u32 reg; @@ -49,6 +78,67 @@ void enable_usboh3_clk(unsigned char enable) } +#ifdef CONFIG_FEC_MXC +void enable_enet_clk(unsigned char enable) +{ + u32 mask = MXC_CCM_CCGR1_ENET_CLK_ENABLE_MASK; + + if (enable) + setbits_le32(&imx_ccm->CCGR1, mask); + else + clrbits_le32(&imx_ccm->CCGR1, mask); +} +#endif + +#ifdef CONFIG_MXC_UART +void enable_uart_clk(unsigned char enable) +{ + u32 mask = MXC_CCM_CCGR5_UART_MASK | MXC_CCM_CCGR5_UART_SERIAL_MASK; + + if (enable) + setbits_le32(&imx_ccm->CCGR5, mask); + else + clrbits_le32(&imx_ccm->CCGR5, mask); +} +#endif + +#ifdef CONFIG_SPI +/* spi_num can be from 0 - 4 */ +int enable_cspi_clock(unsigned char enable, unsigned spi_num) +{ + u32 mask; + + if (spi_num > 4) + return -EINVAL; + + mask = MXC_CCM_CCGR_CG_MASK << (spi_num * 2); + if (enable) + setbits_le32(&imx_ccm->CCGR1, mask); + else + clrbits_le32(&imx_ccm->CCGR1, mask); + + return 0; +} +#endif + +#ifdef CONFIG_MMC +int enable_usdhc_clk(unsigned char enable, unsigned bus_num) +{ + u32 mask; + + if (bus_num > 3) + return -EINVAL; + + mask = MXC_CCM_CCGR_CG_MASK << (bus_num * 2 + 2); + if (enable) + setbits_le32(&imx_ccm->CCGR6, mask); + else + clrbits_le32(&imx_ccm->CCGR6, mask); + + return 0; +} +#endif + #ifdef CONFIG_SYS_I2C_MXC /* i2c_num can be from 0 - 2 */ int enable_i2c_clk(unsigned char enable, unsigned i2c_num) |