diff options
author | Kever Yang <kever.yang@rock-chips.com> | 2016-08-12 17:47:15 +0800 |
---|---|---|
committer | Simon Glass <sjg@chromium.org> | 2016-09-22 07:57:02 -0600 |
commit | 5e79f443550a0aac1a4a118d956a48177972aa51 (patch) | |
tree | 02e0901b5762664d71737bc81f26756f101c56f7 /drivers/clk/rockchip/clk_rk3399.c | |
parent | 4a79ececebdaee108a6f18ddb5684e2590fa2de6 (diff) |
clk: rk3399: add pmucru controller support
pmucru is a module like cru which is a clock controller manage some PLL
and module clocks.
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'drivers/clk/rockchip/clk_rk3399.c')
-rw-r--r-- | drivers/clk/rockchip/clk_rk3399.c | 177 |
1 files changed, 173 insertions, 4 deletions
diff --git a/drivers/clk/rockchip/clk_rk3399.c b/drivers/clk/rockchip/clk_rk3399.c index 0b4ea828f6..ea0ce2aab1 100644 --- a/drivers/clk/rockchip/clk_rk3399.c +++ b/drivers/clk/rockchip/clk_rk3399.c @@ -23,6 +23,10 @@ struct rk3399_clk_priv { ulong rate; }; +struct rk3399_pmuclk_priv { + struct rk3399_pmucru *pmucru; +}; + struct pll_div { u32 refdiv; u32 fbdiv; @@ -95,11 +99,11 @@ enum { /* PMUCRU_CLKSEL_CON2 */ I2C_DIV_CON_MASK = 0x7f, - I2C8_DIV_CON_SHIFT = 8, - I2C0_DIV_CON_SHIFT = 0, + CLK_I2C8_DIV_CON_SHIFT = 8, + CLK_I2C0_DIV_CON_SHIFT = 0, /* PMUCRU_CLKSEL_CON3 */ - I2C4_DIV_CON_SHIFT = 0, + CLK_I2C4_DIV_CON_SHIFT = 0, /* CLKSEL_CON0 */ ACLKM_CORE_L_DIV_CON_SHIFT = 8, @@ -507,6 +511,14 @@ void rk3399_configure_cpu(struct rk3399_cru *cru, (con >> CLK_I2C ##bus## _DIV_CON_SHIFT) & \ I2C_DIV_CON_MASK; +#define I2C_PMUCLK_REG_MASK(bus) \ + (I2C_DIV_CON_MASK << \ + CLK_I2C ##bus## _DIV_CON_SHIFT) + +#define I2C_PMUCLK_REG_VALUE(bus, clk_div) \ + ((clk_div - 1) << \ + CLK_I2C ##bus## _DIV_CON_SHIFT) + static ulong rk3399_i2c_get_clk(struct rk3399_cru *cru, ulong clk_id) { u32 div, con; @@ -754,7 +766,7 @@ static ulong rk3399_clk_set_rate(struct clk *clk, ulong rate) break; case DCLK_VOP0: case DCLK_VOP1: - rate = rk3399_vop_set_clk(priv->cru, clk->id, rate); + ret = rk3399_vop_set_clk(priv->cru, clk->id, rate); break; default: return -ENOENT; @@ -830,3 +842,160 @@ U_BOOT_DRIVER(clk_rk3399) = { .bind = rk3399_clk_bind, .probe = rk3399_clk_probe, }; + +static ulong rk3399_i2c_get_pmuclk(struct rk3399_pmucru *pmucru, ulong clk_id) +{ + u32 div, con; + + switch (clk_id) { + case SCLK_I2C0_PMU: + con = readl(&pmucru->pmucru_clksel[2]); + div = I2C_CLK_DIV_VALUE(con, 0); + break; + case SCLK_I2C4_PMU: + con = readl(&pmucru->pmucru_clksel[3]); + div = I2C_CLK_DIV_VALUE(con, 4); + break; + case SCLK_I2C8_PMU: + con = readl(&pmucru->pmucru_clksel[2]); + div = I2C_CLK_DIV_VALUE(con, 8); + break; + default: + printf("do not support this i2c bus\n"); + return -EINVAL; + } + + return DIV_TO_RATE(PPLL_HZ, div); +} + +static ulong rk3399_i2c_set_pmuclk(struct rk3399_pmucru *pmucru, ulong clk_id, + uint hz) +{ + int src_clk_div; + + src_clk_div = PPLL_HZ / hz; + assert(src_clk_div - 1 < 127); + + switch (clk_id) { + case SCLK_I2C0_PMU: + rk_clrsetreg(&pmucru->pmucru_clksel[2], I2C_PMUCLK_REG_MASK(0), + I2C_PMUCLK_REG_VALUE(0, src_clk_div)); + break; + case SCLK_I2C4_PMU: + rk_clrsetreg(&pmucru->pmucru_clksel[3], I2C_PMUCLK_REG_MASK(4), + I2C_PMUCLK_REG_VALUE(4, src_clk_div)); + break; + case SCLK_I2C8_PMU: + rk_clrsetreg(&pmucru->pmucru_clksel[2], I2C_PMUCLK_REG_MASK(8), + I2C_PMUCLK_REG_VALUE(8, src_clk_div)); + break; + default: + printf("do not support this i2c bus\n"); + return -EINVAL; + } + + return DIV_TO_RATE(PPLL_HZ, src_clk_div); +} + +static ulong rk3399_pwm_get_clk(struct rk3399_pmucru *pmucru) +{ + u32 div, con; + + /* PWM closk rate is same as pclk_pmu */ + con = readl(&pmucru->pmucru_clksel[0]); + div = con & PMU_PCLK_DIV_CON_MASK; + + return DIV_TO_RATE(PPLL_HZ, div); +} + +static ulong rk3399_pmuclk_get_rate(struct clk *clk) +{ + struct rk3399_pmuclk_priv *priv = dev_get_priv(clk->dev); + ulong rate = 0; + + switch (clk->id) { + case PCLK_RKPWM_PMU: + rate = rk3399_pwm_get_clk(priv->pmucru); + break; + case SCLK_I2C0_PMU: + case SCLK_I2C4_PMU: + case SCLK_I2C8_PMU: + rate = rk3399_i2c_get_pmuclk(priv->pmucru, clk->id); + break; + default: + return -ENOENT; + } + + return rate; +} + +static ulong rk3399_pmuclk_set_rate(struct clk *clk, ulong rate) +{ + struct rk3399_pmuclk_priv *priv = dev_get_priv(clk->dev); + ulong ret = 0; + + switch (clk->id) { + case SCLK_I2C0_PMU: + case SCLK_I2C4_PMU: + case SCLK_I2C8_PMU: + ret = rk3399_i2c_set_pmuclk(priv->pmucru, clk->id, rate); + break; + default: + return -ENOENT; + } + + return ret; +} + +static struct clk_ops rk3399_pmuclk_ops = { + .get_rate = rk3399_pmuclk_get_rate, + .set_rate = rk3399_pmuclk_set_rate, +}; + +static void pmuclk_init(struct rk3399_pmucru *pmucru) +{ + u32 pclk_div; + + /* configure pmu pll(ppll) */ + rkclk_set_pll(&pmucru->ppll_con[0], &ppll_init_cfg); + + /* configure pmu pclk */ + pclk_div = PPLL_HZ / PMU_PCLK_HZ - 1; + assert((pclk_div + 1) * PMU_PCLK_HZ == PPLL_HZ && pclk_div < 0x1f); + rk_clrsetreg(&pmucru->pmucru_clksel[0], + PMU_PCLK_DIV_CON_MASK, + pclk_div << PMU_PCLK_DIV_CON_SHIFT); +} + +static int rk3399_pmuclk_probe(struct udevice *dev) +{ + struct rk3399_pmuclk_priv *priv = dev_get_priv(dev); + + pmuclk_init(priv->pmucru); + + return 0; +} + +static int rk3399_pmuclk_ofdata_to_platdata(struct udevice *dev) +{ + struct rk3399_pmuclk_priv *priv = dev_get_priv(dev); + + priv->pmucru = (struct rk3399_pmucru *)dev_get_addr(dev); + + return 0; +} + +static const struct udevice_id rk3399_pmuclk_ids[] = { + { .compatible = "rockchip,rk3399-pmucru" }, + { } +}; + +U_BOOT_DRIVER(pmuclk_rk3399) = { + .name = "pmuclk_rk3399", + .id = UCLASS_CLK, + .of_match = rk3399_pmuclk_ids, + .priv_auto_alloc_size = sizeof(struct rk3399_pmuclk_priv), + .ofdata_to_platdata = rk3399_pmuclk_ofdata_to_platdata, + .ops = &rk3399_pmuclk_ops, + .probe = rk3399_pmuclk_probe, +}; |