diff options
Diffstat (limited to 'arch/arm/mach-shmobile/clock-sh73a0.c')
| -rw-r--r-- | arch/arm/mach-shmobile/clock-sh73a0.c | 151 |
1 files changed, 131 insertions, 20 deletions
diff --git a/arch/arm/mach-shmobile/clock-sh73a0.c b/arch/arm/mach-shmobile/clock-sh73a0.c index 784fbaa4cc5..0d9cd1fe021 100644 --- a/arch/arm/mach-shmobile/clock-sh73a0.c +++ b/arch/arm/mach-shmobile/clock-sh73a0.c @@ -228,6 +228,11 @@ enum { DIV4_I, DIV4_ZG, DIV4_M3, DIV4_B, DIV4_M1, DIV4_M2, static struct clk div4_clks[DIV4_NR] = { [DIV4_I] = DIV4(FRQCRA, 20, 0xdff, CLK_ENABLE_ON_INIT), + /* + * ZG clock is dividing PLL0 frequency to supply SGX. Make sure not to + * exceed maximum frequencies of 201.5MHz for VDD_DVFS=1.175 and + * 239.2MHz for VDD_DVFS=1.315V. + */ [DIV4_ZG] = SH_CLK_DIV4(&pll0_clk, FRQCRA, 16, 0xd7f, CLK_ENABLE_ON_INIT), [DIV4_M3] = DIV4(FRQCRA, 12, 0x1dff, CLK_ENABLE_ON_INIT), [DIV4_B] = DIV4(FRQCRA, 8, 0xdff, CLK_ENABLE_ON_INIT), @@ -252,6 +257,101 @@ static struct clk twd_clk = { .ops = &twd_clk_ops, }; +static struct sh_clk_ops zclk_ops, kicker_ops; +static const struct sh_clk_ops *div4_clk_ops; + +static int zclk_set_rate(struct clk *clk, unsigned long rate) +{ + int ret; + + if (!clk->parent || !__clk_get(clk->parent)) + return -ENODEV; + + if (readl(FRQCRB) & (1 << 31)) + return -EBUSY; + + if (rate == clk_get_rate(clk->parent)) { + /* 1:1 - switch off divider */ + __raw_writel(__raw_readl(FRQCRB) & ~(1 << 28), FRQCRB); + /* nullify the divider to prepare for the next time */ + ret = div4_clk_ops->set_rate(clk, rate / 2); + if (!ret) + ret = frqcr_kick(); + if (ret > 0) + ret = 0; + } else { + /* Enable the divider */ + __raw_writel(__raw_readl(FRQCRB) | (1 << 28), FRQCRB); + + ret = frqcr_kick(); + if (ret >= 0) + /* + * set the divider - call the DIV4 method, it will kick + * FRQCRB too + */ + ret = div4_clk_ops->set_rate(clk, rate); + if (ret < 0) + goto esetrate; + } + +esetrate: + __clk_put(clk->parent); + return ret; +} + +static long zclk_round_rate(struct clk *clk, unsigned long rate) +{ + unsigned long div_freq = div4_clk_ops->round_rate(clk, rate), + parent_freq = clk_get_rate(clk->parent); + + if (rate > div_freq && abs(parent_freq - rate) < rate - div_freq) + return parent_freq; + + return div_freq; +} + +static unsigned long zclk_recalc(struct clk *clk) +{ + /* + * Must recalculate frequencies in case PLL0 has been changed, even if + * the divisor is unused ATM! + */ + unsigned long div_freq = div4_clk_ops->recalc(clk); + + if (__raw_readl(FRQCRB) & (1 << 28)) + return div_freq; + + return clk_get_rate(clk->parent); +} + +static int kicker_set_rate(struct clk *clk, unsigned long rate) +{ + if (__raw_readl(FRQCRB) & (1 << 31)) + return -EBUSY; + + return div4_clk_ops->set_rate(clk, rate); +} + +static void div4_clk_extend(void) +{ + int i; + + div4_clk_ops = div4_clks[0].ops; + + /* Add a kicker-busy check before changing the rate */ + kicker_ops = *div4_clk_ops; + /* We extend the DIV4 clock with a 1:1 pass-through case */ + zclk_ops = *div4_clk_ops; + + kicker_ops.set_rate = kicker_set_rate; + zclk_ops.set_rate = zclk_set_rate; + zclk_ops.round_rate = zclk_round_rate; + zclk_ops.recalc = zclk_recalc; + + for (i = 0; i < DIV4_NR; i++) + div4_clks[i].ops = i == DIV4_Z ? &zclk_ops : &kicker_ops; +} + enum { DIV6_VCK1, DIV6_VCK2, DIV6_VCK3, DIV6_ZB1, DIV6_FLCTL, DIV6_SDHI0, DIV6_SDHI1, DIV6_SDHI2, DIV6_FSIA, DIV6_FSIB, DIV6_SUB, @@ -450,12 +550,12 @@ static struct clk *late_main_clks[] = { }; enum { MSTP001, - MSTP129, MSTP128, MSTP127, MSTP126, MSTP125, MSTP118, MSTP116, MSTP100, + MSTP129, MSTP128, MSTP127, MSTP126, MSTP125, MSTP118, MSTP116, MSTP112, MSTP100, MSTP219, MSTP218, MSTP217, MSTP207, MSTP206, MSTP204, MSTP203, MSTP202, MSTP201, MSTP200, MSTP331, MSTP329, MSTP328, MSTP325, MSTP323, MSTP322, MSTP314, MSTP313, MSTP312, MSTP311, - MSTP303, MSTP302, MSTP301, MSTP300, + MSTP304, MSTP303, MSTP302, MSTP301, MSTP300, MSTP411, MSTP410, MSTP403, MSTP_NR }; @@ -471,6 +571,7 @@ static struct clk mstp_clks[MSTP_NR] = { [MSTP125] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR1, 25, 0), /* TMU0 */ [MSTP118] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 18, 0), /* DSITX0 */ [MSTP116] = MSTP(&div4_clks[DIV4_HP], SMSTPCR1, 16, 0), /* IIC0 */ + [MSTP112] = MSTP(&div4_clks[DIV4_ZG], SMSTPCR1, 12, 0), /* SGX */ [MSTP100] = MSTP(&div4_clks[DIV4_B], SMSTPCR1, 0, 0), /* LCDC0 */ [MSTP219] = MSTP(&div6_clks[DIV6_SUB], SMSTPCR2, 19, 0), /* SCIFA7 */ [MSTP218] = MSTP(&div4_clks[DIV4_HP], SMSTPCR2, 18, 0), /* SY-DMAC */ @@ -492,6 +593,7 @@ static struct clk mstp_clks[MSTP_NR] = { [MSTP313] = MSTP(&div6_clks[DIV6_SDHI1], SMSTPCR3, 13, 0), /* SDHI1 */ [MSTP312] = MSTP(&div4_clks[DIV4_HP], SMSTPCR3, 12, 0), /* MMCIF0 */ [MSTP311] = MSTP(&div6_clks[DIV6_SDHI2], SMSTPCR3, 11, 0), /* SDHI2 */ + [MSTP304] = MSTP(&main_div2_clk, SMSTPCR3, 4, 0), /* TPU0 */ [MSTP303] = MSTP(&main_div2_clk, SMSTPCR3, 3, 0), /* TPU1 */ [MSTP302] = MSTP(&main_div2_clk, SMSTPCR3, 2, 0), /* TPU2 */ [MSTP301] = MSTP(&main_div2_clk, SMSTPCR3, 1, 0), /* TPU3 */ @@ -513,6 +615,9 @@ static struct clk_lookup lookups[] = { CLKDEV_CON_ID("r_clk", &r_clk), CLKDEV_DEV_ID("smp_twd", &twd_clk), /* smp_twd */ + /* DIV4 clocks */ + CLKDEV_DEV_ID("cpu0", &div4_clks[DIV4_Z]), + /* DIV6 clocks */ CLKDEV_CON_ID("vck1_clk", &div6_clks[DIV6_VCK1]), CLKDEV_CON_ID("vck2_clk", &div6_clks[DIV6_VCK2]), @@ -520,12 +625,6 @@ static struct clk_lookup lookups[] = { CLKDEV_CON_ID("sdhi0_clk", &div6_clks[DIV6_SDHI0]), CLKDEV_CON_ID("sdhi1_clk", &div6_clks[DIV6_SDHI1]), CLKDEV_CON_ID("sdhi2_clk", &div6_clks[DIV6_SDHI2]), - CLKDEV_ICK_ID("dsit_clk", "sh-mipi-dsi.0", &div6_clks[DIV6_DSIT]), - CLKDEV_ICK_ID("dsit_clk", "sh-mipi-dsi.1", &div6_clks[DIV6_DSIT]), - CLKDEV_ICK_ID("dsip_clk", "sh-mipi-dsi.0", &div6_clks[DIV6_DSI0P]), - CLKDEV_ICK_ID("dsip_clk", "sh-mipi-dsi.1", &div6_clks[DIV6_DSI1P]), - CLKDEV_ICK_ID("dsiphy_clk", "sh-mipi-dsi.0", &dsi0phy_clk), - CLKDEV_ICK_ID("dsiphy_clk", "sh-mipi-dsi.1", &dsi1phy_clk), /* MSTP32 clocks */ CLKDEV_DEV_ID("i2c-sh_mobile.2", &mstp_clks[MSTP001]), /* I2C2 */ @@ -534,8 +633,6 @@ static struct clk_lookup lookups[] = { CLKDEV_DEV_ID("sh-mobile-csi2.1", &mstp_clks[MSTP128]), /* CSI2-RX1 */ CLKDEV_DEV_ID("sh_mobile_ceu.0", &mstp_clks[MSTP127]), /* CEU0 */ CLKDEV_DEV_ID("sh-mobile-csi2.0", &mstp_clks[MSTP126]), /* CSI2-RX0 */ - CLKDEV_DEV_ID("sh_tmu.0", &mstp_clks[MSTP125]), /* TMU00 */ - CLKDEV_DEV_ID("sh_tmu.1", &mstp_clks[MSTP125]), /* TMU01 */ CLKDEV_DEV_ID("sh-mipi-dsi.0", &mstp_clks[MSTP118]), /* DSITX */ CLKDEV_DEV_ID("i2c-sh_mobile.0", &mstp_clks[MSTP116]), /* I2C0 */ CLKDEV_DEV_ID("e6820000.i2c", &mstp_clks[MSTP116]), /* I2C0 */ @@ -551,29 +648,40 @@ static struct clk_lookup lookups[] = { CLKDEV_DEV_ID("sh-sci.3", &mstp_clks[MSTP201]), /* SCIFA3 */ CLKDEV_DEV_ID("sh-sci.4", &mstp_clks[MSTP200]), /* SCIFA4 */ CLKDEV_DEV_ID("sh-sci.6", &mstp_clks[MSTP331]), /* SCIFA6 */ - CLKDEV_DEV_ID("sh_cmt.10", &mstp_clks[MSTP329]), /* CMT10 */ CLKDEV_DEV_ID("sh_fsi2", &mstp_clks[MSTP328]), /* FSI */ + CLKDEV_DEV_ID("ec230000.sound", &mstp_clks[MSTP328]), /* FSI */ CLKDEV_DEV_ID("sh_irda.0", &mstp_clks[MSTP325]), /* IrDA */ CLKDEV_DEV_ID("i2c-sh_mobile.1", &mstp_clks[MSTP323]), /* I2C1 */ CLKDEV_DEV_ID("e6822000.i2c", &mstp_clks[MSTP323]), /* I2C1 */ CLKDEV_DEV_ID("renesas_usbhs", &mstp_clks[MSTP322]), /* USB */ CLKDEV_DEV_ID("sh_mobile_sdhi.0", &mstp_clks[MSTP314]), /* SDHI0 */ - CLKDEV_DEV_ID("ee100000.sdhi", &mstp_clks[MSTP314]), /* SDHI0 */ + CLKDEV_DEV_ID("ee100000.sd", &mstp_clks[MSTP314]), /* SDHI0 */ CLKDEV_DEV_ID("sh_mobile_sdhi.1", &mstp_clks[MSTP313]), /* SDHI1 */ - CLKDEV_DEV_ID("ee120000.sdhi", &mstp_clks[MSTP313]), /* SDHI1 */ + CLKDEV_DEV_ID("ee120000.sd", &mstp_clks[MSTP313]), /* SDHI1 */ CLKDEV_DEV_ID("sh_mmcif.0", &mstp_clks[MSTP312]), /* MMCIF0 */ - CLKDEV_DEV_ID("e6bd0000.mmcif", &mstp_clks[MSTP312]), /* MMCIF0 */ + CLKDEV_DEV_ID("e6bd0000.mmc", &mstp_clks[MSTP312]), /* MMCIF0 */ CLKDEV_DEV_ID("sh_mobile_sdhi.2", &mstp_clks[MSTP311]), /* SDHI2 */ - CLKDEV_DEV_ID("ee140000.sdhi", &mstp_clks[MSTP311]), /* SDHI2 */ - CLKDEV_DEV_ID("leds-renesas-tpu.12", &mstp_clks[MSTP303]), /* TPU1 */ - CLKDEV_DEV_ID("leds-renesas-tpu.21", &mstp_clks[MSTP302]), /* TPU2 */ - CLKDEV_DEV_ID("leds-renesas-tpu.30", &mstp_clks[MSTP301]), /* TPU3 */ - CLKDEV_DEV_ID("leds-renesas-tpu.41", &mstp_clks[MSTP300]), /* TPU4 */ + CLKDEV_DEV_ID("ee140000.sd", &mstp_clks[MSTP311]), /* SDHI2 */ + CLKDEV_DEV_ID("renesas-tpu-pwm.0", &mstp_clks[MSTP304]), /* TPU0 */ + CLKDEV_DEV_ID("renesas-tpu-pwm.1", &mstp_clks[MSTP303]), /* TPU1 */ + CLKDEV_DEV_ID("renesas-tpu-pwm.2", &mstp_clks[MSTP302]), /* TPU2 */ + CLKDEV_DEV_ID("renesas-tpu-pwm.3", &mstp_clks[MSTP301]), /* TPU3 */ + CLKDEV_DEV_ID("renesas-tpu-pwm.4", &mstp_clks[MSTP300]), /* TPU4 */ CLKDEV_DEV_ID("i2c-sh_mobile.3", &mstp_clks[MSTP411]), /* I2C3 */ CLKDEV_DEV_ID("e6826000.i2c", &mstp_clks[MSTP411]), /* I2C3 */ CLKDEV_DEV_ID("i2c-sh_mobile.4", &mstp_clks[MSTP410]), /* I2C4 */ CLKDEV_DEV_ID("e6828000.i2c", &mstp_clks[MSTP410]), /* I2C4 */ CLKDEV_DEV_ID("sh_keysc.0", &mstp_clks[MSTP403]), /* KEYSC */ + + /* ICK */ + CLKDEV_ICK_ID("dsit_clk", "sh-mipi-dsi.0", &div6_clks[DIV6_DSIT]), + CLKDEV_ICK_ID("dsit_clk", "sh-mipi-dsi.1", &div6_clks[DIV6_DSIT]), + CLKDEV_ICK_ID("dsip_clk", "sh-mipi-dsi.0", &div6_clks[DIV6_DSI0P]), + CLKDEV_ICK_ID("dsip_clk", "sh-mipi-dsi.1", &div6_clks[DIV6_DSI1P]), + CLKDEV_ICK_ID("dsiphy_clk", "sh-mipi-dsi.0", &dsi0phy_clk), + CLKDEV_ICK_ID("dsiphy_clk", "sh-mipi-dsi.1", &dsi1phy_clk), + CLKDEV_ICK_ID("fck", "sh-cmt-48.1", &mstp_clks[MSTP329]), /* CMT1 */ + CLKDEV_ICK_ID("fck", "sh-tmu.0", &mstp_clks[MSTP125]), /* TMU0 */ }; void __init sh73a0_clock_init(void) @@ -604,8 +712,11 @@ void __init sh73a0_clock_init(void) for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++) ret = clk_register(main_clks[k]); - if (!ret) + if (!ret) { ret = sh_clk_div4_register(div4_clks, DIV4_NR, &div4_table); + if (!ret) + div4_clk_extend(); + } if (!ret) ret = sh_clk_div6_reparent_register(div6_clks, DIV6_NR); |