diff options
Diffstat (limited to 'arch/arm/mach-mvf/clock.c')
| -rw-r--r-- | arch/arm/mach-mvf/clock.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/arch/arm/mach-mvf/clock.c b/arch/arm/mach-mvf/clock.c index 37247607311d..872f12f85d7b 100644 --- a/arch/arm/mach-mvf/clock.c +++ b/arch/arm/mach-mvf/clock.c @@ -1805,6 +1805,70 @@ static struct clk adc_clk[] = { }, }; +static unsigned long _clk_can_get_rate(struct clk *clk) +{ + return clk_get_rate(clk->parent); +} + +static int can_clk_enable(struct clk *can_clk) +{ + u32 reg; + + /* enable CAN clk */ + reg = __raw_readl(MXC_CCM_CSCDR2); + if(can_clk->id == 0) + reg |= MXC_CCM_CSCDR2_CAN0_EN; + if(can_clk->id == 1) + reg |= MXC_CCM_CSCDR2_CAN1_EN; + __raw_writel(reg, MXC_CCM_CSCDR2); + + /* gate clock */ + _clk_enable(can_clk); + + return 0; +} + +static int can_clk_disable(struct clk *can_clk) +{ + u32 reg; + + /* disable CAN clk */ + reg = __raw_readl(MXC_CCM_CSCDR2); + if(can_clk->id == 0) + reg &= ~MXC_CCM_CSCDR2_CAN0_EN; + if(can_clk->id == 1) + reg &= ~MXC_CCM_CSCDR2_CAN1_EN; + __raw_writel(reg, MXC_CCM_CSCDR2); + + /* gate clock */ + _clk_disable(can_clk); + + return 0; +} + +static struct clk can_clk[] = { + { + __INIT_CLK_DEBUG(can_clk) + .id = 0, + .parent = &ipg_clk, + .enable_reg = MXC_CCM_CCGR0, + .enable_shift = MXC_CCM_CCGRx_CG0_OFFSET, + .enable = can_clk_enable, + .disable = can_clk_disable, + .get_rate = _clk_can_get_rate, + }, + { + __INIT_CLK_DEBUG(can_clk) + .id = 1, + .parent = &ipg_clk, + .enable_reg = MXC_CCM_CCGR9, + .enable_shift = MXC_CCM_CCGRx_CG4_OFFSET, + .enable = can_clk_enable, + .disable = can_clk_disable, + .get_rate = _clk_can_get_rate, + }, +}; + static struct clk i2c_clk[] = { { __INIT_CLK_DEBUG(i2c_clk_0) @@ -2068,6 +2132,8 @@ static struct clk_lookup lookups[] = { _REGISTER_CLOCK("fec.1", NULL, enet_clk[1]), _REGISTER_CLOCK("mvf-adc.0", NULL, adc_clk[0]), _REGISTER_CLOCK("mvf-adc.1", NULL, adc_clk[1]), + _REGISTER_CLOCK("mvf-flexcan.0", NULL, can_clk[0]), + _REGISTER_CLOCK("mvf-flexcan.1", NULL, can_clk[1]), _REGISTER_CLOCK("switch.0", NULL, enet_clk[0]), _REGISTER_CLOCK("imx2-wdt.0", NULL, dummy_clk), _REGISTER_CLOCK("sdhci-esdhc-imx.1", NULL, esdhc1_clk), |