diff mbox series

[v3,1/5] clk: rockchip: Add supprot to limit input rate for fractional divider

Message ID 1569553244-3165-2-git-send-email-zhangqing@rock-chips.com (mailing list archive)
State New, archived
Headers show
Series clk: rockchip: Support for some new features | expand

Commit Message

Elaine Zhang Sept. 27, 2019, 3 a.m. UTC 
From: Finley Xiao <finley.xiao@rock-chips.com>

From Rockchips fractional divider usage, some clocks can be generated
by fractional divider, but the input clock frequency of fractional
divider should be less than a specified value.

Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
---
 drivers/clk/rockchip/clk-px30.c   | 29 ++++++++++++------------
 drivers/clk/rockchip/clk-rk3036.c | 13 ++++++-----
 drivers/clk/rockchip/clk-rk3128.c | 15 ++++++++-----
 drivers/clk/rockchip/clk-rk3188.c | 24 +++++++++++---------
 drivers/clk/rockchip/clk-rk3228.c | 18 +++++++++------
 drivers/clk/rockchip/clk-rk3288.c | 19 +++++++++-------
 drivers/clk/rockchip/clk-rk3308.c | 46 ++++++++++++++++++++++-----------------
 drivers/clk/rockchip/clk-rk3328.c | 17 +++++++++------
 drivers/clk/rockchip/clk-rk3368.c | 17 +++++++++------
 drivers/clk/rockchip/clk-rk3399.c | 32 ++++++++++++++++-----------
 drivers/clk/rockchip/clk-rv1108.c | 14 +++++++-----
 drivers/clk/rockchip/clk.c        | 21 +++++++++++++++---
 drivers/clk/rockchip/clk.h        | 10 ++++++---
 include/linux/clk-provider.h      |  2 ++
 14 files changed, 168 insertions(+), 109 deletions(-)

Comments

Stephen Boyd Oct. 3, 2019, 6:10 p.m. UTC | #1 
Quoting Elaine Zhang (2019-09-26 20:00:40)
> diff --git a/drivers/clk/rockchip/clk-px30.c b/drivers/clk/rockchip/clk-px30.c
> index 3a501896b280..6c2f53dc73b6 100644
> --- a/drivers/clk/rockchip/clk-px30.c
> +++ b/drivers/clk/rockchip/clk-px30.c
> @@ -13,6 +13,7 @@
>  #include "clk.h"
>  
>  #define PX30_GRF_SOC_STATUS0           0x480
> +#define PX30_FRAC_MAX_PRATE            600000000
>  
>  enum px30_plls {
>         apll, dpll, cpll, npll, apll_b_h, apll_b_l,
> @@ -420,7 +421,7 @@ enum px30_pmu_plls {
>         COMPOSITE_FRACMUX(0, "dclk_vopb_frac", "dclk_vopb_src", CLK_SET_RATE_PARENT,
>                         PX30_CLKSEL_CON(6), 0,
>                         PX30_CLKGATE_CON(2), 3, GFLAGS,
> -                       &px30_dclk_vopb_fracmux),
> +                       &px30_dclk_vopb_fracmux, 0),
>         GATE(DCLK_VOPB, "dclk_vopb", "dclk_vopb_mux", CLK_SET_RATE_PARENT,
>                         PX30_CLKGATE_CON(2), 4, GFLAGS),
>         COMPOSITE(0, "dclk_vopl_src", mux_npll_cpll_p, 0,
> @@ -429,7 +430,7 @@ enum px30_pmu_plls {
>         COMPOSITE_FRACMUX(0, "dclk_vopl_frac", "dclk_vopl_src", CLK_SET_RATE_PARENT,
>                         PX30_CLKSEL_CON(9), 0,
>                         PX30_CLKGATE_CON(2), 7, GFLAGS,
> -                       &px30_dclk_vopl_fracmux),
> +                       &px30_dclk_vopl_fracmux, 0),
>         GATE(DCLK_VOPL, "dclk_vopl", "dclk_vopl_mux", CLK_SET_RATE_PARENT,
>                         PX30_CLKGATE_CON(2), 8, GFLAGS),
>  
> @@ -555,7 +556,7 @@ enum px30_pmu_plls {
>         COMPOSITE_FRACMUX(0, "clk_pdm_frac", "clk_pdm_src", CLK_SET_RATE_PARENT,

Can you make a new macro COMPOSITE_FRACMUX_PRATE or something that
passes in another argument so that we don't have to change the users
of this macro when they don't care?

>                         PX30_CLKSEL_CON(27), 0,
>                         PX30_CLKGATE_CON(9), 10, GFLAGS,
> -                       &px30_pdm_fracmux),
> +                       &px30_pdm_fracmux, PX30_FRAC_MAX_PRATE),
>         GATE(SCLK_PDM, "clk_pdm", "clk_pdm_mux", CLK_SET_RATE_PARENT,
>                         PX30_CLKGATE_CON(9), 11, GFLAGS),
>  
> diff --git a/drivers/clk/rockchip/clk-rk3399.c b/drivers/clk/rockchip/clk-rk3399.c
> index ce1d2446f142..bda5d50c5319 100644
> --- a/drivers/clk/rockchip/clk-rk3399.c
> +++ b/drivers/clk/rockchip/clk-rk3399.c
> @@ -13,6 +13,12 @@
>  #include <dt-bindings/clock/rk3399-cru.h>
>  #include "clk.h"
>  
> +#define RK3399_I2S_FRAC_MAX_PRATE       800000000
> +#define RK3399_UART_FRAC_MAX_PRATE     800000000
> +#define RK3399_SPDIF_FRAC_MAX_PRATE    600000000
> +#define RK3399_VOP_FRAC_MAX_PRATE      600000000
> +#define RK3399_WIFI_FRAC_MAX_PRATE     600000000

Is the "max rate" really just the frequency of the parent? If so, why
can't round_rate() on the parent figure out what that value is and only
provide that frequency?

> +
>  enum rk3399_plls {
>         lpll, bpll, dpll, cpll, gpll, npll, vpll,
>  };
> diff --git a/drivers/clk/rockchip/clk.c b/drivers/clk/rockchip/clk.c
> index 546e810c3560..fac5a4a3f5c3 100644
> --- a/drivers/clk/rockchip/clk.c
> +++ b/drivers/clk/rockchip/clk.c
> @@ -184,12 +184,26 @@ static void rockchip_fractional_approximation(struct clk_hw *hw,
>         unsigned long p_rate, p_parent_rate;
>         struct clk_hw *p_parent;
>         unsigned long scale;
> +       u32 div;

Why u32 instead of unsigned long?

>  
>         p_rate = clk_hw_get_rate(clk_hw_get_parent(hw));
> -       if ((rate * 20 > p_rate) && (p_rate % rate != 0)) {
> +       if (((rate * 20 > p_rate) && (p_rate % rate != 0)) ||
> +           (fd->max_prate && fd->max_prate < p_rate)) {
>                 p_parent = clk_hw_get_parent(clk_hw_get_parent(hw));
>                 p_parent_rate = clk_hw_get_rate(p_parent);
>                 *parent_rate = p_parent_rate;
> +               if (fd->max_prate && p_parent_rate > fd->max_prate) {
> +                       div = DIV_ROUND_UP(p_parent_rate, fd->max_prate);
> +                       *parent_rate = p_parent_rate / div;
> +               }
> +
> +               if (*parent_rate < rate * 20) {

20 seems very magical.

> +                       pr_err("%s parent_rate(%ld) is low than rate(%ld)*20, fractional div is not allowed\n",

s/low/lower/?

> +                              clk_hw_get_name(hw), *parent_rate, rate);
> +                       *m = 0;
> +                       *n = 1;
> +                       return;
> +               }
>         }
>  
>         /*
> diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
> index 2ae7604783dd..30993c0630a3 100644
> --- a/include/linux/clk-provider.h
> +++ b/include/linux/clk-provider.h
> @@ -624,6 +624,7 @@ struct clk_hw *clk_hw_register_fixed_factor(struct device *dev,
>   * @mwidth:    width of the numerator bit field
>   * @nshift:    shift to the denominator bit field
>   * @nwidth:    width of the denominator bit field
> + * @max_parent:        the maximum frequency of fractional divider parent clock

This doesn't match the name of the member.

>   * @lock:      register lock
>   *
>   * Clock with adjustable fractional divider affecting its output frequency.
> @@ -647,6 +648,7 @@ struct clk_fractional_divider {
>         u8              nwidth;
>         u32             nmask;
>         u8              flags;
> +       unsigned long   max_prate;
diff mbox series

Patch

diff --git a/drivers/clk/rockchip/clk-px30.c b/drivers/clk/rockchip/clk-px30.c
index 3a501896b280..6c2f53dc73b6 100644
--- a/drivers/clk/rockchip/clk-px30.c
+++ b/drivers/clk/rockchip/clk-px30.c
@@ -13,6 +13,7 @@ 
 #include "clk.h"
 
 #define PX30_GRF_SOC_STATUS0		0x480
+#define PX30_FRAC_MAX_PRATE		600000000
 
 enum px30_plls {
 	apll, dpll, cpll, npll, apll_b_h, apll_b_l,
@@ -420,7 +421,7 @@  enum px30_pmu_plls {
 	COMPOSITE_FRACMUX(0, "dclk_vopb_frac", "dclk_vopb_src", CLK_SET_RATE_PARENT,
 			PX30_CLKSEL_CON(6), 0,
 			PX30_CLKGATE_CON(2), 3, GFLAGS,
-			&px30_dclk_vopb_fracmux),
+			&px30_dclk_vopb_fracmux, 0),
 	GATE(DCLK_VOPB, "dclk_vopb", "dclk_vopb_mux", CLK_SET_RATE_PARENT,
 			PX30_CLKGATE_CON(2), 4, GFLAGS),
 	COMPOSITE(0, "dclk_vopl_src", mux_npll_cpll_p, 0,
@@ -429,7 +430,7 @@  enum px30_pmu_plls {
 	COMPOSITE_FRACMUX(0, "dclk_vopl_frac", "dclk_vopl_src", CLK_SET_RATE_PARENT,
 			PX30_CLKSEL_CON(9), 0,
 			PX30_CLKGATE_CON(2), 7, GFLAGS,
-			&px30_dclk_vopl_fracmux),
+			&px30_dclk_vopl_fracmux, 0),
 	GATE(DCLK_VOPL, "dclk_vopl", "dclk_vopl_mux", CLK_SET_RATE_PARENT,
 			PX30_CLKGATE_CON(2), 8, GFLAGS),
 
@@ -555,7 +556,7 @@  enum px30_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_pdm_frac", "clk_pdm_src", CLK_SET_RATE_PARENT,
 			PX30_CLKSEL_CON(27), 0,
 			PX30_CLKGATE_CON(9), 10, GFLAGS,
-			&px30_pdm_fracmux),
+			&px30_pdm_fracmux, PX30_FRAC_MAX_PRATE),
 	GATE(SCLK_PDM, "clk_pdm", "clk_pdm_mux", CLK_SET_RATE_PARENT,
 			PX30_CLKGATE_CON(9), 11, GFLAGS),
 
@@ -565,7 +566,7 @@  enum px30_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s0_tx_frac", "clk_i2s0_tx_src", CLK_SET_RATE_PARENT,
 			PX30_CLKSEL_CON(29), 0,
 			PX30_CLKGATE_CON(9), 13, GFLAGS,
-			&px30_i2s0_tx_fracmux),
+			&px30_i2s0_tx_fracmux, PX30_FRAC_MAX_PRATE),
 	COMPOSITE_NODIV(SCLK_I2S0_TX, "clk_i2s0_tx", mux_i2s0_tx_rx_p, CLK_SET_RATE_PARENT,
 			PX30_CLKSEL_CON(28), 12, 1, MFLAGS,
 			PX30_CLKGATE_CON(9), 14, GFLAGS),
@@ -581,7 +582,7 @@  enum px30_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s0_rx_frac", "clk_i2s0_rx_src", CLK_SET_RATE_PARENT,
 			PX30_CLKSEL_CON(59), 0,
 			PX30_CLKGATE_CON(17), 1, GFLAGS,
-			&px30_i2s0_rx_fracmux),
+			&px30_i2s0_rx_fracmux, PX30_FRAC_MAX_PRATE),
 	COMPOSITE_NODIV(SCLK_I2S0_RX, "clk_i2s0_rx", mux_i2s0_rx_tx_p, CLK_SET_RATE_PARENT,
 			PX30_CLKSEL_CON(58), 12, 1, MFLAGS,
 			PX30_CLKGATE_CON(17), 2, GFLAGS),
@@ -597,7 +598,7 @@  enum px30_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s1_frac", "clk_i2s1_src", CLK_SET_RATE_PARENT,
 			PX30_CLKSEL_CON(31), 0,
 			PX30_CLKGATE_CON(10), 1, GFLAGS,
-			&px30_i2s1_fracmux),
+			&px30_i2s1_fracmux, PX30_FRAC_MAX_PRATE),
 	GATE(SCLK_I2S1, "clk_i2s1", "clk_i2s1_mux", CLK_SET_RATE_PARENT,
 			PX30_CLKGATE_CON(10), 2, GFLAGS),
 	COMPOSITE_NODIV(0, "clk_i2s1_out_pre", mux_i2s1_out_p, 0,
@@ -612,7 +613,7 @@  enum px30_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s2_frac", "clk_i2s2_src", CLK_SET_RATE_PARENT,
 			PX30_CLKSEL_CON(33), 0,
 			PX30_CLKGATE_CON(10), 5, GFLAGS,
-			&px30_i2s2_fracmux),
+			&px30_i2s2_fracmux, PX30_FRAC_MAX_PRATE),
 	GATE(SCLK_I2S2, "clk_i2s2", "clk_i2s2_mux", CLK_SET_RATE_PARENT,
 			PX30_CLKGATE_CON(10), 6, GFLAGS),
 	COMPOSITE_NODIV(0, "clk_i2s2_out_pre", mux_i2s2_out_p, 0,
@@ -630,7 +631,7 @@  enum px30_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart1_frac", "clk_uart1_src", CLK_SET_RATE_PARENT,
 			PX30_CLKSEL_CON(36), 0,
 			PX30_CLKGATE_CON(10), 14, GFLAGS,
-			&px30_uart1_fracmux),
+			&px30_uart1_fracmux, PX30_FRAC_MAX_PRATE),
 	GATE(SCLK_UART1, "clk_uart1", "clk_uart1_mux", CLK_SET_RATE_PARENT,
 			PX30_CLKGATE_CON(10), 15, GFLAGS),
 
@@ -643,7 +644,7 @@  enum px30_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart2_frac", "clk_uart2_src", CLK_SET_RATE_PARENT,
 			PX30_CLKSEL_CON(39), 0,
 			PX30_CLKGATE_CON(11), 2, GFLAGS,
-			&px30_uart2_fracmux),
+			&px30_uart2_fracmux, PX30_FRAC_MAX_PRATE),
 	GATE(SCLK_UART2, "clk_uart2", "clk_uart2_mux", CLK_SET_RATE_PARENT,
 			PX30_CLKGATE_CON(11), 3, GFLAGS),
 
@@ -656,7 +657,7 @@  enum px30_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart3_frac", "clk_uart3_src", CLK_SET_RATE_PARENT,
 			PX30_CLKSEL_CON(42), 0,
 			PX30_CLKGATE_CON(11), 6, GFLAGS,
-			&px30_uart3_fracmux),
+			&px30_uart3_fracmux, PX30_FRAC_MAX_PRATE),
 	GATE(SCLK_UART3, "clk_uart3", "clk_uart3_mux", CLK_SET_RATE_PARENT,
 			PX30_CLKGATE_CON(11), 7, GFLAGS),
 
@@ -669,7 +670,7 @@  enum px30_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart4_frac", "clk_uart4_src", CLK_SET_RATE_PARENT,
 			PX30_CLKSEL_CON(45), 0,
 			PX30_CLKGATE_CON(11), 10, GFLAGS,
-			&px30_uart4_fracmux),
+			&px30_uart4_fracmux, PX30_FRAC_MAX_PRATE),
 	GATE(SCLK_UART4, "clk_uart4", "clk_uart4_mux", CLK_SET_RATE_PARENT,
 			PX30_CLKGATE_CON(11), 11, GFLAGS),
 
@@ -682,7 +683,7 @@  enum px30_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart5_frac", "clk_uart5_src", CLK_SET_RATE_PARENT,
 			PX30_CLKSEL_CON(48), 0,
 			PX30_CLKGATE_CON(11), 14, GFLAGS,
-			&px30_uart5_fracmux),
+			&px30_uart5_fracmux, PX30_FRAC_MAX_PRATE),
 	GATE(SCLK_UART5, "clk_uart5", "clk_uart5_mux", CLK_SET_RATE_PARENT,
 			PX30_CLKGATE_CON(11), 15, GFLAGS),
 
@@ -882,7 +883,7 @@  enum px30_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_rtc32k_frac", "xin24m", CLK_IGNORE_UNUSED,
 			PX30_PMU_CLKSEL_CON(1), 0,
 			PX30_PMU_CLKGATE_CON(0), 13, GFLAGS,
-			&px30_rtc32k_pmu_fracmux),
+			&px30_rtc32k_pmu_fracmux, 0),
 
 	COMPOSITE_NOMUX(XIN24M_DIV, "xin24m_div", "xin24m", CLK_IGNORE_UNUSED,
 			PX30_PMU_CLKSEL_CON(0), 8, 5, DFLAGS,
@@ -904,7 +905,7 @@  enum px30_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart0_frac", "clk_uart0_pmu_src", CLK_SET_RATE_PARENT,
 			PX30_PMU_CLKSEL_CON(5), 0,
 			PX30_PMU_CLKGATE_CON(1), 2, GFLAGS,
-			&px30_uart0_pmu_fracmux),
+			&px30_uart0_pmu_fracmux, PX30_FRAC_MAX_PRATE),
 	GATE(SCLK_UART0_PMU, "clk_uart0_pmu", "clk_uart0_pmu_mux", CLK_SET_RATE_PARENT,
 			PX30_PMU_CLKGATE_CON(1), 3, GFLAGS),
 
diff --git a/drivers/clk/rockchip/clk-rk3036.c b/drivers/clk/rockchip/clk-rk3036.c
index 6a46f85ad837..80876c8f8c9d 100644
--- a/drivers/clk/rockchip/clk-rk3036.c
+++ b/drivers/clk/rockchip/clk-rk3036.c
@@ -16,6 +16,9 @@ 
 #include "clk.h"
 
 #define RK3036_GRF_SOC_STATUS0	0x14c
+#define RK3036_UART_FRAC_MAX_PRATE	600000000
+#define RK3036_I2S_FRAC_MAX_PRATE	600000000
+#define RK3036_SPDIF_FRAC_MAX_PRATE	600000000
 
 enum rk3036_plls {
 	apll, dpll, gpll,
@@ -248,15 +251,15 @@  enum rk3036_plls {
 	COMPOSITE_FRACMUX(0, "uart0_frac", "uart0_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(17), 0,
 			RK2928_CLKGATE_CON(1), 9, GFLAGS,
-			&rk3036_uart0_fracmux),
+			&rk3036_uart0_fracmux, RK3036_UART_FRAC_MAX_PRATE),
 	COMPOSITE_FRACMUX(0, "uart1_frac", "uart1_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(18), 0,
 			RK2928_CLKGATE_CON(1), 11, GFLAGS,
-			&rk3036_uart1_fracmux),
+			&rk3036_uart1_fracmux, RK3036_UART_FRAC_MAX_PRATE),
 	COMPOSITE_FRACMUX(0, "uart2_frac", "uart2_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(19), 0,
 			RK2928_CLKGATE_CON(1), 13, GFLAGS,
-			&rk3036_uart2_fracmux),
+			&rk3036_uart2_fracmux, RK3036_UART_FRAC_MAX_PRATE),
 
 	COMPOSITE(0, "aclk_vcodec", mux_pll_src_3plls_p, 0,
 			RK2928_CLKSEL_CON(32), 14, 2, MFLAGS, 8, 5, DFLAGS,
@@ -309,7 +312,7 @@  enum rk3036_plls {
 	COMPOSITE_FRACMUX(0, "i2s_frac", "i2s_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(7), 0,
 			RK2928_CLKGATE_CON(0), 10, GFLAGS,
-			&rk3036_i2s_fracmux),
+			&rk3036_i2s_fracmux, RK3036_I2S_FRAC_MAX_PRATE),
 	COMPOSITE_NODIV(SCLK_I2S_OUT, "i2s_clkout", mux_i2s_clkout_p, 0,
 			RK2928_CLKSEL_CON(3), 12, 1, MFLAGS,
 			RK2928_CLKGATE_CON(0), 13, GFLAGS),
@@ -322,7 +325,7 @@  enum rk3036_plls {
 	COMPOSITE_FRACMUX(0, "spdif_frac", "spdif_src", 0,
 			RK2928_CLKSEL_CON(9), 0,
 			RK2928_CLKGATE_CON(2), 12, GFLAGS,
-			&rk3036_spdif_fracmux),
+			&rk3036_spdif_fracmux, RK3036_SPDIF_FRAC_MAX_PRATE),
 
 	GATE(SCLK_OTGPHY0, "sclk_otgphy0", "xin12m", CLK_IGNORE_UNUSED,
 			RK2928_CLKGATE_CON(1), 5, GFLAGS),
diff --git a/drivers/clk/rockchip/clk-rk3128.c b/drivers/clk/rockchip/clk-rk3128.c
index 4b1122e98e16..9eecd56d06db 100644
--- a/drivers/clk/rockchip/clk-rk3128.c
+++ b/drivers/clk/rockchip/clk-rk3128.c
@@ -13,6 +13,9 @@ 
 #include "clk.h"
 
 #define RK3128_GRF_SOC_STATUS0	0x14c
+#define RK3128_UART_FRAC_MAX_PRATE	600000000
+#define RK3128_I2S_FRAC_MAX_PRATE	600000000
+#define RK3128_SPDIF_FRAC_MAX_PRATE	600000000
 
 enum rk3128_plls {
 	apll, dpll, cpll, gpll,
@@ -359,7 +362,7 @@  enum rk3128_plls {
 	COMPOSITE_FRACMUX(0, "i2s0_frac", "i2s0_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(8), 0,
 			RK2928_CLKGATE_CON(4), 5, GFLAGS,
-			&rk3128_i2s0_fracmux),
+			&rk3128_i2s0_fracmux, RK3128_I2S_FRAC_MAX_PRATE),
 	GATE(SCLK_I2S0, "sclk_i2s0", "i2s0_pre", CLK_SET_RATE_PARENT,
 			RK2928_CLKGATE_CON(4), 6, GFLAGS),
 
@@ -369,7 +372,7 @@  enum rk3128_plls {
 	COMPOSITE_FRACMUX(0, "i2s1_frac", "i2s1_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(7), 0,
 			RK2928_CLKGATE_CON(0), 10, GFLAGS,
-			&rk3128_i2s1_fracmux),
+			&rk3128_i2s1_fracmux, RK3128_I2S_FRAC_MAX_PRATE),
 	GATE(SCLK_I2S1, "sclk_i2s1", "i2s1_pre", CLK_SET_RATE_PARENT,
 			RK2928_CLKGATE_CON(0), 14, GFLAGS),
 	COMPOSITE_NODIV(SCLK_I2S_OUT, "i2s_out", mux_i2s_out_p, 0,
@@ -382,7 +385,7 @@  enum rk3128_plls {
 	COMPOSITE_FRACMUX(0, "spdif_frac", "sclk_spdif_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(20), 0,
 			RK2928_CLKGATE_CON(2), 12, GFLAGS,
-			&rk3128_spdif_fracmux),
+			&rk3128_spdif_fracmux, RK3128_SPDIF_FRAC_MAX_PRATE),
 
 	GATE(0, "jtag", "ext_jtag", CLK_IGNORE_UNUSED,
 			RK2928_CLKGATE_CON(1), 3, GFLAGS),
@@ -419,15 +422,15 @@  enum rk3128_plls {
 	COMPOSITE_FRACMUX(0, "uart0_frac", "uart0_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(17), 0,
 			RK2928_CLKGATE_CON(1), 9, GFLAGS,
-			&rk3128_uart0_fracmux),
+			&rk3128_uart0_fracmux, RK3128_UART_FRAC_MAX_PRATE),
 	COMPOSITE_FRACMUX(0, "uart1_frac", "uart1_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(18), 0,
 			RK2928_CLKGATE_CON(1), 11, GFLAGS,
-			&rk3128_uart1_fracmux),
+			&rk3128_uart1_fracmux, RK3128_UART_FRAC_MAX_PRATE),
 	COMPOSITE_FRACMUX(0, "uart2_frac", "uart2_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(19), 0,
 			RK2928_CLKGATE_CON(1), 13, GFLAGS,
-			&rk3128_uart2_fracmux),
+			&rk3128_uart2_fracmux, RK3128_UART_FRAC_MAX_PRATE),
 
 	COMPOSITE(SCLK_MAC_SRC, "sclk_gmac_src", mux_pll_src_3plls_p, 0,
 			RK2928_CLKSEL_CON(5), 6, 2, MFLAGS, 0, 5, DFLAGS,
diff --git a/drivers/clk/rockchip/clk-rk3188.c b/drivers/clk/rockchip/clk-rk3188.c
index 77aebfb1d6d5..4823f5ca943d 100644
--- a/drivers/clk/rockchip/clk-rk3188.c
+++ b/drivers/clk/rockchip/clk-rk3188.c
@@ -14,6 +14,10 @@ 
 
 #define RK3066_GRF_SOC_STATUS	0x15c
 #define RK3188_GRF_SOC_STATUS	0xac
+#define RK3188_UART_FRAC_MAX_PRATE	600000000
+#define RK3188_I2S_FRAC_MAX_PRATE	600000000
+#define RK3188_SPDIF_FRAC_MAX_PRATE	600000000
+#define RK3188_HSADC_FRAC_MAX_PRATE	300000000
 
 enum rk3188_plls {
 	apll, cpll, dpll, gpll,
@@ -363,7 +367,7 @@  enum rk3188_plls {
 	COMPOSITE_FRACMUX(0, "hsadc_frac", "hsadc_src", 0,
 			RK2928_CLKSEL_CON(23), 0,
 			RK2928_CLKGATE_CON(2), 7, GFLAGS,
-			&common_hsadc_out_fracmux),
+			&common_hsadc_out_fracmux, RK3188_HSADC_FRAC_MAX_PRATE),
 	INVERTER(SCLK_HSADC, "sclk_hsadc", "sclk_hsadc_out",
 			RK2928_CLKSEL_CON(22), 7, IFLAGS),
 
@@ -377,7 +381,7 @@  enum rk3188_plls {
 	COMPOSITE_FRACMUX(0, "spdif_frac", "spdif_pre", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(9), 0,
 			RK2928_CLKGATE_CON(0), 14, GFLAGS,
-			&common_spdif_fracmux),
+			&common_spdif_fracmux, RK3188_SPDIF_FRAC_MAX_PRATE),
 
 	/*
 	 * Clock-Architecture Diagram 4
@@ -411,28 +415,28 @@  enum rk3188_plls {
 	COMPOSITE_FRACMUX(0, "uart0_frac", "uart0_pre", 0,
 			RK2928_CLKSEL_CON(17), 0,
 			RK2928_CLKGATE_CON(1), 9, GFLAGS,
-			&common_uart0_fracmux),
+			&common_uart0_fracmux, RK3188_UART_FRAC_MAX_PRATE),
 	COMPOSITE_NOMUX(0, "uart1_pre", "uart_src", 0,
 			RK2928_CLKSEL_CON(14), 0, 7, DFLAGS,
 			RK2928_CLKGATE_CON(1), 10, GFLAGS),
 	COMPOSITE_FRACMUX(0, "uart1_frac", "uart1_pre", 0,
 			RK2928_CLKSEL_CON(18), 0,
 			RK2928_CLKGATE_CON(1), 11, GFLAGS,
-			&common_uart1_fracmux),
+			&common_uart1_fracmux, RK3188_UART_FRAC_MAX_PRATE),
 	COMPOSITE_NOMUX(0, "uart2_pre", "uart_src", 0,
 			RK2928_CLKSEL_CON(15), 0, 7, DFLAGS,
 			RK2928_CLKGATE_CON(1), 12, GFLAGS),
 	COMPOSITE_FRACMUX(0, "uart2_frac", "uart2_pre", 0,
 			RK2928_CLKSEL_CON(19), 0,
 			RK2928_CLKGATE_CON(1), 13, GFLAGS,
-			&common_uart2_fracmux),
+			&common_uart2_fracmux, RK3188_UART_FRAC_MAX_PRATE),
 	COMPOSITE_NOMUX(0, "uart3_pre", "uart_src", 0,
 			RK2928_CLKSEL_CON(16), 0, 7, DFLAGS,
 			RK2928_CLKGATE_CON(1), 14, GFLAGS),
 	COMPOSITE_FRACMUX(0, "uart3_frac", "uart3_pre", 0,
 			RK2928_CLKSEL_CON(20), 0,
 			RK2928_CLKGATE_CON(1), 15, GFLAGS,
-			&common_uart3_fracmux),
+			&common_uart3_fracmux, RK3188_UART_FRAC_MAX_PRATE),
 
 	GATE(SCLK_JTAG, "jtag", "ext_jtag", 0, RK2928_CLKGATE_CON(1), 3, GFLAGS),
 
@@ -618,21 +622,21 @@  enum rk3188_plls {
 	COMPOSITE_FRACMUX(0, "i2s0_frac", "i2s0_pre", 0,
 			RK2928_CLKSEL_CON(6), 0,
 			RK2928_CLKGATE_CON(0), 8, GFLAGS,
-			&rk3066a_i2s0_fracmux),
+			&rk3066a_i2s0_fracmux, RK3188_I2S_FRAC_MAX_PRATE),
 	COMPOSITE_NOMUX(0, "i2s1_pre", "i2s_src", 0,
 			RK2928_CLKSEL_CON(3), 0, 7, DFLAGS,
 			RK2928_CLKGATE_CON(0), 9, GFLAGS),
 	COMPOSITE_FRACMUX(0, "i2s1_frac", "i2s1_pre", 0,
 			RK2928_CLKSEL_CON(7), 0,
 			RK2928_CLKGATE_CON(0), 10, GFLAGS,
-			&rk3066a_i2s1_fracmux),
+			&rk3066a_i2s1_fracmux, RK3188_I2S_FRAC_MAX_PRATE),
 	COMPOSITE_NOMUX(0, "i2s2_pre", "i2s_src", 0,
 			RK2928_CLKSEL_CON(4), 0, 7, DFLAGS,
 			RK2928_CLKGATE_CON(0), 11, GFLAGS),
 	COMPOSITE_FRACMUX(0, "i2s2_frac", "i2s2_pre", 0,
 			RK2928_CLKSEL_CON(8), 0,
 			RK2928_CLKGATE_CON(0), 12, GFLAGS,
-			&rk3066a_i2s2_fracmux),
+			&rk3066a_i2s2_fracmux, RK3188_I2S_FRAC_MAX_PRATE),
 
 	GATE(HCLK_I2S1, "hclk_i2s1", "hclk_cpu", 0, RK2928_CLKGATE_CON(7), 3, GFLAGS),
 	GATE(HCLK_I2S2, "hclk_i2s2", "hclk_cpu", 0, RK2928_CLKGATE_CON(7), 4, GFLAGS),
@@ -726,7 +730,7 @@  enum rk3188_plls {
 	COMPOSITE_FRACMUX(0, "i2s0_frac", "i2s0_pre", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(7), 0,
 			RK2928_CLKGATE_CON(0), 10, GFLAGS,
-			&rk3188_i2s0_fracmux),
+			&rk3188_i2s0_fracmux, RK3188_I2S_FRAC_MAX_PRATE),
 
 	GATE(0, "hclk_imem0", "hclk_cpu", 0, RK2928_CLKGATE_CON(4), 14, GFLAGS),
 	GATE(0, "hclk_imem1", "hclk_cpu", 0, RK2928_CLKGATE_CON(4), 15, GFLAGS),
diff --git a/drivers/clk/rockchip/clk-rk3228.c b/drivers/clk/rockchip/clk-rk3228.c
index d17cfb7a3ff4..f5178c77de3a 100644
--- a/drivers/clk/rockchip/clk-rk3228.c
+++ b/drivers/clk/rockchip/clk-rk3228.c
@@ -15,6 +15,10 @@ 
 
 #define RK3228_GRF_SOC_STATUS0	0x480
 
+#define RK3228_UART_FRAC_MAX_PRATE	600000000
+#define RK3228_SPDIF_FRAC_MAX_PRATE	600000000
+#define RK3228_I2S_FRAC_MAX_PRATE	600000000
+
 enum rk3228_plls {
 	apll, dpll, cpll, gpll,
 };
@@ -421,7 +425,7 @@  enum rk3228_plls {
 	COMPOSITE_FRACMUX(0, "i2s0_frac", "i2s0_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(8), 0,
 			RK2928_CLKGATE_CON(0), 4, GFLAGS,
-			&rk3228_i2s0_fracmux),
+			&rk3228_i2s0_fracmux, RK3228_I2S_FRAC_MAX_PRATE),
 	GATE(SCLK_I2S0, "sclk_i2s0", "i2s0_pre", CLK_SET_RATE_PARENT,
 			RK2928_CLKGATE_CON(0), 5, GFLAGS),
 
@@ -431,7 +435,7 @@  enum rk3228_plls {
 	COMPOSITE_FRACMUX(0, "i2s1_frac", "i2s1_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(7), 0,
 			RK2928_CLKGATE_CON(0), 11, GFLAGS,
-			&rk3228_i2s1_fracmux),
+			&rk3228_i2s1_fracmux, RK3228_I2S_FRAC_MAX_PRATE),
 	GATE(SCLK_I2S1, "sclk_i2s1", "i2s1_pre", CLK_SET_RATE_PARENT,
 			RK2928_CLKGATE_CON(0), 14, GFLAGS),
 	COMPOSITE_NODIV(SCLK_I2S_OUT, "i2s_out", mux_i2s_out_p, 0,
@@ -444,7 +448,7 @@  enum rk3228_plls {
 	COMPOSITE_FRACMUX(0, "i2s2_frac", "i2s2_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(30), 0,
 			RK2928_CLKGATE_CON(0), 8, GFLAGS,
-			&rk3228_i2s2_fracmux),
+			&rk3228_i2s2_fracmux, RK3228_I2S_FRAC_MAX_PRATE),
 	GATE(SCLK_I2S2, "sclk_i2s2", "i2s2_pre", CLK_SET_RATE_PARENT,
 			RK2928_CLKGATE_CON(0), 9, GFLAGS),
 
@@ -454,7 +458,7 @@  enum rk3228_plls {
 	COMPOSITE_FRACMUX(0, "spdif_frac", "sclk_spdif_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(20), 0,
 			RK2928_CLKGATE_CON(2), 12, GFLAGS,
-			&rk3228_spdif_fracmux),
+			&rk3228_spdif_fracmux, RK3228_SPDIF_FRAC_MAX_PRATE),
 
 	GATE(0, "jtag", "ext_jtag", CLK_IGNORE_UNUSED,
 			RK2928_CLKGATE_CON(1), 3, GFLAGS),
@@ -496,15 +500,15 @@  enum rk3228_plls {
 	COMPOSITE_FRACMUX(0, "uart0_frac", "uart0_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(17), 0,
 			RK2928_CLKGATE_CON(1), 9, GFLAGS,
-			&rk3228_uart0_fracmux),
+			&rk3228_uart0_fracmux, RK3228_UART_FRAC_MAX_PRATE),
 	COMPOSITE_FRACMUX(0, "uart1_frac", "uart1_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(18), 0,
 			RK2928_CLKGATE_CON(1), 11, GFLAGS,
-			&rk3228_uart1_fracmux),
+			&rk3228_uart1_fracmux, RK3228_UART_FRAC_MAX_PRATE),
 	COMPOSITE_FRACMUX(0, "uart2_frac", "uart2_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(19), 0,
 			RK2928_CLKGATE_CON(1), 13, GFLAGS,
-			&rk3228_uart2_fracmux),
+			&rk3228_uart2_fracmux, RK3228_UART_FRAC_MAX_PRATE),
 
 	COMPOSITE(SCLK_NANDC, "sclk_nandc", mux_pll_src_2plls_p, 0,
 			RK2928_CLKSEL_CON(2), 14, 1, MFLAGS, 8, 5, DFLAGS,
diff --git a/drivers/clk/rockchip/clk-rk3288.c b/drivers/clk/rockchip/clk-rk3288.c
index cc2a177bbdbf..5f2b6f125c79 100644
--- a/drivers/clk/rockchip/clk-rk3288.c
+++ b/drivers/clk/rockchip/clk-rk3288.c
@@ -14,6 +14,9 @@ 
 
 #define RK3288_GRF_SOC_CON(x)	(0x244 + x * 4)
 #define RK3288_GRF_SOC_STATUS1	0x284
+#define RK3288_UART_FRAC_MAX_PRATE	600000000
+#define RK3288_I2S_FRAC_MAX_PRATE	600000000
+#define RK3288_SPDIF_FRAC_MAX_PRATE	600000000
 
 enum rk3288_plls {
 	apll, dpll, cpll, gpll, npll,
@@ -357,7 +360,7 @@  enum rk3288_plls {
 	COMPOSITE_FRACMUX(0, "i2s_frac", "i2s_src", CLK_SET_RATE_PARENT,
 			RK3288_CLKSEL_CON(8), 0,
 			RK3288_CLKGATE_CON(4), 2, GFLAGS,
-			&rk3288_i2s_fracmux),
+			&rk3288_i2s_fracmux, RK3288_I2S_FRAC_MAX_PRATE),
 	COMPOSITE_NODIV(SCLK_I2S0_OUT, "i2s0_clkout", mux_i2s_clkout_p, 0,
 			RK3288_CLKSEL_CON(4), 12, 1, MFLAGS,
 			RK3288_CLKGATE_CON(4), 0, GFLAGS),
@@ -372,7 +375,7 @@  enum rk3288_plls {
 	COMPOSITE_FRACMUX(0, "spdif_frac", "spdif_src", CLK_SET_RATE_PARENT,
 			RK3288_CLKSEL_CON(9), 0,
 			RK3288_CLKGATE_CON(4), 5, GFLAGS,
-			&rk3288_spdif_fracmux),
+			&rk3288_spdif_fracmux, RK3288_SPDIF_FRAC_MAX_PRATE),
 	GATE(SCLK_SPDIF, "sclk_spdif", "spdif_mux", CLK_SET_RATE_PARENT,
 			RK3288_CLKGATE_CON(4), 6, GFLAGS),
 	COMPOSITE_NOMUX(0, "spdif_8ch_pre", "spdif_src", CLK_SET_RATE_PARENT,
@@ -381,7 +384,7 @@  enum rk3288_plls {
 	COMPOSITE_FRACMUX(0, "spdif_8ch_frac", "spdif_8ch_pre", CLK_SET_RATE_PARENT,
 			RK3288_CLKSEL_CON(41), 0,
 			RK3288_CLKGATE_CON(4), 8, GFLAGS,
-			&rk3288_spdif_8ch_fracmux),
+			&rk3288_spdif_8ch_fracmux, RK3288_SPDIF_FRAC_MAX_PRATE),
 	GATE(SCLK_SPDIF8CH, "sclk_spdif_8ch", "spdif_8ch_mux", CLK_SET_RATE_PARENT,
 			RK3288_CLKGATE_CON(4), 9, GFLAGS),
 
@@ -584,7 +587,7 @@  enum rk3288_plls {
 	COMPOSITE_FRACMUX(0, "uart0_frac", "uart0_src", CLK_SET_RATE_PARENT,
 			RK3288_CLKSEL_CON(17), 0,
 			RK3288_CLKGATE_CON(1), 9, GFLAGS,
-			&rk3288_uart0_fracmux),
+			&rk3288_uart0_fracmux, RK3288_UART_FRAC_MAX_PRATE),
 	MUX(0, "uart_src", mux_pll_src_cpll_gpll_p, 0,
 			RK3288_CLKSEL_CON(13), 15, 1, MFLAGS),
 	COMPOSITE_NOMUX(0, "uart1_src", "uart_src", 0,
@@ -593,28 +596,28 @@  enum rk3288_plls {
 	COMPOSITE_FRACMUX(0, "uart1_frac", "uart1_src", CLK_SET_RATE_PARENT,
 			RK3288_CLKSEL_CON(18), 0,
 			RK3288_CLKGATE_CON(1), 11, GFLAGS,
-			&rk3288_uart1_fracmux),
+			&rk3288_uart1_fracmux, RK3288_UART_FRAC_MAX_PRATE),
 	COMPOSITE_NOMUX(0, "uart2_src", "uart_src", 0,
 			RK3288_CLKSEL_CON(15), 0, 7, DFLAGS,
 			RK3288_CLKGATE_CON(1), 12, GFLAGS),
 	COMPOSITE_FRACMUX(0, "uart2_frac", "uart2_src", CLK_SET_RATE_PARENT,
 			RK3288_CLKSEL_CON(19), 0,
 			RK3288_CLKGATE_CON(1), 13, GFLAGS,
-			&rk3288_uart2_fracmux),
+			&rk3288_uart2_fracmux, RK3288_UART_FRAC_MAX_PRATE),
 	COMPOSITE_NOMUX(0, "uart3_src", "uart_src", 0,
 			RK3288_CLKSEL_CON(16), 0, 7, DFLAGS,
 			RK3288_CLKGATE_CON(1), 14, GFLAGS),
 	COMPOSITE_FRACMUX(0, "uart3_frac", "uart3_src", CLK_SET_RATE_PARENT,
 			RK3288_CLKSEL_CON(20), 0,
 			RK3288_CLKGATE_CON(1), 15, GFLAGS,
-			&rk3288_uart3_fracmux),
+			&rk3288_uart3_fracmux, RK3288_UART_FRAC_MAX_PRATE),
 	COMPOSITE_NOMUX(0, "uart4_src", "uart_src", 0,
 			RK3288_CLKSEL_CON(3), 0, 7, DFLAGS,
 			RK3288_CLKGATE_CON(2), 12, GFLAGS),
 	COMPOSITE_FRACMUX(0, "uart4_frac", "uart4_src", CLK_SET_RATE_PARENT,
 			RK3288_CLKSEL_CON(7), 0,
 			RK3288_CLKGATE_CON(2), 13, GFLAGS,
-			&rk3288_uart4_fracmux),
+			&rk3288_uart4_fracmux, RK3288_UART_FRAC_MAX_PRATE),
 
 	COMPOSITE(0, "mac_pll_src", mux_pll_src_npll_cpll_gpll_p, 0,
 			RK3288_CLKSEL_CON(21), 0, 2, MFLAGS, 8, 5, DFLAGS,
diff --git a/drivers/clk/rockchip/clk-rk3308.c b/drivers/clk/rockchip/clk-rk3308.c
index b0baf87a283e..f3942a9a38c6 100644
--- a/drivers/clk/rockchip/clk-rk3308.c
+++ b/drivers/clk/rockchip/clk-rk3308.c
@@ -13,6 +13,12 @@ 
 #include "clk.h"
 
 #define RK3308_GRF_SOC_STATUS0		0x380
+#define RK3308_VOP_FRAC_MAX_PRATE	270000000
+#define RK3308B_VOP_FRAC_MAX_PRATE	800000000
+#define RK3308_UART_FRAC_MAX_PRATE	800000000
+#define RK3308_PDM_FRAC_MAX_PRATE	800000000
+#define RK3308_SPDIF_FRAC_MAX_PRATE	800000000
+#define RK3308_I2S_FRAC_MAX_PRATE	800000000
 
 enum rk3308_plls {
 	apll, dpll, vpll0, vpll1,
@@ -333,7 +339,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart0_frac", "clk_uart0_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(12), 0,
 			RK3308_CLKGATE_CON(1), 11, GFLAGS,
-			&rk3308_uart0_fracmux),
+			&rk3308_uart0_fracmux, RK3308_UART_FRAC_MAX_PRATE),
 	GATE(SCLK_UART0, "clk_uart0", "clk_uart0_mux", 0,
 			RK3308_CLKGATE_CON(1), 12, GFLAGS),
 
@@ -343,7 +349,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart1_frac", "clk_uart1_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(15), 0,
 			RK3308_CLKGATE_CON(1), 15, GFLAGS,
-			&rk3308_uart1_fracmux),
+			&rk3308_uart1_fracmux, RK3308_UART_FRAC_MAX_PRATE),
 	GATE(SCLK_UART1, "clk_uart1", "clk_uart1_mux", 0,
 			RK3308_CLKGATE_CON(2), 0, GFLAGS),
 
@@ -353,7 +359,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart2_frac", "clk_uart2_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(18), 0,
 			RK3308_CLKGATE_CON(2), 3, GFLAGS,
-			&rk3308_uart2_fracmux),
+			&rk3308_uart2_fracmux, RK3308_UART_FRAC_MAX_PRATE),
 	GATE(SCLK_UART2, "clk_uart2", "clk_uart2_mux", CLK_SET_RATE_PARENT,
 			RK3308_CLKGATE_CON(2), 4, GFLAGS),
 
@@ -363,7 +369,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart3_frac", "clk_uart3_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(21), 0,
 			RK3308_CLKGATE_CON(2), 7, GFLAGS,
-			&rk3308_uart3_fracmux),
+			&rk3308_uart3_fracmux, RK3308_UART_FRAC_MAX_PRATE),
 	GATE(SCLK_UART3, "clk_uart3", "clk_uart3_mux", 0,
 			RK3308_CLKGATE_CON(2), 8, GFLAGS),
 
@@ -373,7 +379,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart4_frac", "clk_uart4_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(24), 0,
 			RK3308_CLKGATE_CON(2), 11, GFLAGS,
-			&rk3308_uart4_fracmux),
+			&rk3308_uart4_fracmux, RK3308_UART_FRAC_MAX_PRATE),
 	GATE(SCLK_UART4, "clk_uart4", "clk_uart4_mux", 0,
 			RK3308_CLKGATE_CON(2), 12, GFLAGS),
 
@@ -453,7 +459,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "dclk_vop_frac", "dclk_vop_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(9), 0,
 			RK3308_CLKGATE_CON(1), 7, GFLAGS,
-			&rk3308_dclk_vop_fracmux),
+			&rk3308_dclk_vop_fracmux, RK3308B_VOP_FRAC_MAX_PRATE),
 	GATE(DCLK_VOP, "dclk_vop", "dclk_vop_mux", 0,
 			RK3308_CLKGATE_CON(1), 8, GFLAGS),
 
@@ -584,7 +590,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_rtc32k_frac", "xin24m", CLK_IGNORE_UNUSED,
 			RK3308_CLKSEL_CON(3), 0,
 			RK3308_CLKGATE_CON(4), 3, GFLAGS,
-			&rk3308_rtc32k_fracmux),
+			&rk3308_rtc32k_fracmux, 0),
 	MUX(0, "clk_rtc32k_div_src", mux_vpll0_vpll1_p, 0,
 			RK3308_CLKSEL_CON(2), 10, 1, MFLAGS),
 	COMPOSITE_NOMUX(0, "clk_rtc32k_div", "clk_rtc32k_div_src", CLK_IGNORE_UNUSED | CLK_SET_RATE_PARENT,
@@ -634,7 +640,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_pdm_frac", "clk_pdm_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(47), 0,
 			RK3308_CLKGATE_CON(10), 4, GFLAGS,
-			&rk3308_pdm_fracmux),
+			&rk3308_pdm_fracmux, RK3308_PDM_FRAC_MAX_PRATE),
 	GATE(SCLK_PDM, "clk_pdm", "clk_pdm_mux", 0,
 			RK3308_CLKGATE_CON(10), 5, GFLAGS),
 
@@ -644,7 +650,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s0_8ch_tx_frac", "clk_i2s0_8ch_tx_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(53), 0,
 			RK3308_CLKGATE_CON(10), 13, GFLAGS,
-			&rk3308_i2s0_8ch_tx_fracmux),
+			&rk3308_i2s0_8ch_tx_fracmux, RK3308_I2S_FRAC_MAX_PRATE),
 	COMPOSITE_NODIV(SCLK_I2S0_8CH_TX, "clk_i2s0_8ch_tx", mux_i2s0_8ch_tx_rx_p, CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(52), 12, 1, MFLAGS,
 			RK3308_CLKGATE_CON(10), 14, GFLAGS),
@@ -658,7 +664,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s0_8ch_rx_frac", "clk_i2s0_8ch_rx_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(55), 0,
 			RK3308_CLKGATE_CON(11), 1, GFLAGS,
-			&rk3308_i2s0_8ch_rx_fracmux),
+			&rk3308_i2s0_8ch_rx_fracmux, RK3308_I2S_FRAC_MAX_PRATE),
 	COMPOSITE_NODIV(SCLK_I2S0_8CH_RX, "clk_i2s0_8ch_rx", mux_i2s0_8ch_rx_tx_p, CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(54), 12, 1, MFLAGS,
 			RK3308_CLKGATE_CON(11), 2, GFLAGS),
@@ -671,7 +677,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s1_8ch_tx_frac", "clk_i2s1_8ch_tx_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(57), 0,
 			RK3308_CLKGATE_CON(11), 5, GFLAGS,
-			&rk3308_i2s1_8ch_tx_fracmux),
+			&rk3308_i2s1_8ch_tx_fracmux, RK3308_I2S_FRAC_MAX_PRATE),
 	COMPOSITE_NODIV(SCLK_I2S1_8CH_TX, "clk_i2s1_8ch_tx", mux_i2s1_8ch_tx_rx_p, CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(56), 12, 1, MFLAGS,
 			RK3308_CLKGATE_CON(11), 6, GFLAGS),
@@ -685,7 +691,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s1_8ch_rx_frac", "clk_i2s1_8ch_rx_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(59), 0,
 			RK3308_CLKGATE_CON(11), 9, GFLAGS,
-			&rk3308_i2s1_8ch_rx_fracmux),
+			&rk3308_i2s1_8ch_rx_fracmux, RK3308_I2S_FRAC_MAX_PRATE),
 	COMPOSITE_NODIV(SCLK_I2S1_8CH_RX, "clk_i2s1_8ch_rx", mux_i2s1_8ch_rx_tx_p, CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(58), 12, 1, MFLAGS,
 			RK3308_CLKGATE_CON(11), 10, GFLAGS),
@@ -698,7 +704,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s2_8ch_tx_frac", "clk_i2s2_8ch_tx_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(61), 0,
 			RK3308_CLKGATE_CON(11), 13, GFLAGS,
-			&rk3308_i2s2_8ch_tx_fracmux),
+			&rk3308_i2s2_8ch_tx_fracmux, RK3308_I2S_FRAC_MAX_PRATE),
 	COMPOSITE_NODIV(SCLK_I2S2_8CH_TX, "clk_i2s2_8ch_tx", mux_i2s2_8ch_tx_rx_p, CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(60), 12, 1, MFLAGS,
 			RK3308_CLKGATE_CON(11), 14, GFLAGS),
@@ -712,7 +718,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s2_8ch_rx_frac", "clk_i2s2_8ch_rx_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(63), 0,
 			RK3308_CLKGATE_CON(12), 1, GFLAGS,
-			&rk3308_i2s2_8ch_rx_fracmux),
+			&rk3308_i2s2_8ch_rx_fracmux, RK3308_I2S_FRAC_MAX_PRATE),
 	COMPOSITE_NODIV(SCLK_I2S2_8CH_RX, "clk_i2s2_8ch_rx", mux_i2s2_8ch_rx_tx_p, CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(62), 12, 1, MFLAGS,
 			RK3308_CLKGATE_CON(12), 2, GFLAGS),
@@ -725,7 +731,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s3_8ch_tx_frac", "clk_i2s3_8ch_tx_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(65), 0,
 			RK3308_CLKGATE_CON(12), 5, GFLAGS,
-			&rk3308_i2s3_8ch_tx_fracmux),
+			&rk3308_i2s3_8ch_tx_fracmux, RK3308_I2S_FRAC_MAX_PRATE),
 	COMPOSITE_NODIV(SCLK_I2S3_8CH_TX, "clk_i2s3_8ch_tx", mux_i2s3_8ch_tx_rx_p, CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(64), 12, 1, MFLAGS,
 			RK3308_CLKGATE_CON(12), 6, GFLAGS),
@@ -739,7 +745,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s3_8ch_rx_frac", "clk_i2s3_8ch_rx_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(67), 0,
 			RK3308_CLKGATE_CON(12), 9, GFLAGS,
-			&rk3308_i2s3_8ch_rx_fracmux),
+			&rk3308_i2s3_8ch_rx_fracmux, RK3308_I2S_FRAC_MAX_PRATE),
 	COMPOSITE_NODIV(SCLK_I2S3_8CH_RX, "clk_i2s3_8ch_rx", mux_i2s3_8ch_rx_tx_p, CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(66), 12, 1, MFLAGS,
 			RK3308_CLKGATE_CON(12), 10, GFLAGS),
@@ -752,7 +758,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s0_2ch_frac", "clk_i2s0_2ch_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(69), 0,
 			RK3308_CLKGATE_CON(12), 13, GFLAGS,
-			&rk3308_i2s0_2ch_fracmux),
+			&rk3308_i2s0_2ch_fracmux, RK3308_I2S_FRAC_MAX_PRATE),
 	GATE(SCLK_I2S0_2CH, "clk_i2s0_2ch", "clk_i2s0_2ch_mux", 0,
 			RK3308_CLKGATE_CON(12), 14, GFLAGS),
 	COMPOSITE_NODIV(SCLK_I2S0_2CH_OUT, "clk_i2s0_2ch_out", mux_i2s0_2ch_out_p, CLK_SET_RATE_PARENT,
@@ -765,7 +771,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s1_2ch_frac", "clk_i2s1_2ch_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(71), 0,
 			RK3308_CLKGATE_CON(13), 1, GFLAGS,
-			&rk3308_i2s1_2ch_fracmux),
+			&rk3308_i2s1_2ch_fracmux, RK3308_I2S_FRAC_MAX_PRATE),
 	GATE(SCLK_I2S1_2CH, "clk_i2s1_2ch", "clk_i2s1_2ch_mux", 0,
 			RK3308_CLKGATE_CON(13), 2, GFLAGS),
 	COMPOSITE_NODIV(SCLK_I2S1_2CH_OUT, "clk_i2s1_2ch_out", mux_i2s1_2ch_out_p, CLK_SET_RATE_PARENT,
@@ -783,7 +789,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_spdif_tx_frac", "clk_spdif_tx_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(49), 0,
 			RK3308_CLKGATE_CON(10), 7, GFLAGS,
-			&rk3308_spdif_tx_fracmux),
+			&rk3308_spdif_tx_fracmux, RK3308_SPDIF_FRAC_MAX_PRATE),
 	GATE(SCLK_SPDIF_TX, "clk_spdif_tx", "clk_spdif_tx_mux", 0,
 			RK3308_CLKGATE_CON(10), 8, GFLAGS),
 
@@ -798,7 +804,7 @@  enum rk3308_plls {
 	COMPOSITE_FRACMUX(0, "clk_spdif_rx_frac", "clk_spdif_rx_src", CLK_SET_RATE_PARENT,
 			RK3308_CLKSEL_CON(51), 0,
 			RK3308_CLKGATE_CON(10), 10, GFLAGS,
-			&rk3308_spdif_rx_fracmux),
+			&rk3308_spdif_rx_fracmux, RK3308_SPDIF_FRAC_MAX_PRATE),
 	GATE(SCLK_SPDIF_RX, "clk_spdif_rx", "clk_spdif_rx_mux", 0,
 			RK3308_CLKGATE_CON(10), 11, GFLAGS),
 
diff --git a/drivers/clk/rockchip/clk-rk3328.c b/drivers/clk/rockchip/clk-rk3328.c
index c186a1985bf4..12b1f645cacd 100644
--- a/drivers/clk/rockchip/clk-rk3328.c
+++ b/drivers/clk/rockchip/clk-rk3328.c
@@ -16,6 +16,9 @@ 
 #define RK3328_GRF_SOC_STATUS0		0x480
 #define RK3328_GRF_MAC_CON1		0x904
 #define RK3328_GRF_MAC_CON2		0x908
+#define RK3328_I2S_FRAC_MAX_PRATE       600000000
+#define RK3328_UART_FRAC_MAX_PRATE	600000000
+#define RK3328_SPDIF_FRAC_MAX_PRATE	600000000
 
 enum rk3328_plls {
 	apll, dpll, cpll, gpll, npll,
@@ -372,7 +375,7 @@  enum rk3328_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s0_frac", "clk_i2s0_div", CLK_SET_RATE_PARENT,
 			RK3328_CLKSEL_CON(7), 0,
 			RK3328_CLKGATE_CON(1), 2, GFLAGS,
-			&rk3328_i2s0_fracmux),
+			&rk3328_i2s0_fracmux, RK3328_I2S_FRAC_MAX_PRATE),
 	GATE(SCLK_I2S0, "clk_i2s0", "i2s0_pre", CLK_SET_RATE_PARENT,
 			RK3328_CLKGATE_CON(1), 3, GFLAGS),
 
@@ -382,7 +385,7 @@  enum rk3328_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s1_frac", "clk_i2s1_div", CLK_SET_RATE_PARENT,
 			RK3328_CLKSEL_CON(9), 0,
 			RK3328_CLKGATE_CON(1), 5, GFLAGS,
-			&rk3328_i2s1_fracmux),
+			&rk3328_i2s1_fracmux, RK3328_I2S_FRAC_MAX_PRATE),
 	GATE(SCLK_I2S1, "clk_i2s1", "i2s1_pre", CLK_SET_RATE_PARENT,
 			RK3328_CLKGATE_CON(1), 6, GFLAGS),
 	COMPOSITE_NODIV(SCLK_I2S1_OUT, "i2s1_out", mux_i2s1out_p, 0,
@@ -395,7 +398,7 @@  enum rk3328_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s2_frac", "clk_i2s2_div", CLK_SET_RATE_PARENT,
 			RK3328_CLKSEL_CON(11), 0,
 			RK3328_CLKGATE_CON(1), 9, GFLAGS,
-			&rk3328_i2s2_fracmux),
+			&rk3328_i2s2_fracmux, RK3328_I2S_FRAC_MAX_PRATE),
 	GATE(SCLK_I2S2, "clk_i2s2", "i2s2_pre", CLK_SET_RATE_PARENT,
 			RK3328_CLKGATE_CON(1), 10, GFLAGS),
 	COMPOSITE_NODIV(SCLK_I2S2_OUT, "i2s2_out", mux_i2s2out_p, 0,
@@ -408,7 +411,7 @@  enum rk3328_plls {
 	COMPOSITE_FRACMUX(0, "clk_spdif_frac", "clk_spdif_div", CLK_SET_RATE_PARENT,
 			RK3328_CLKSEL_CON(13), 0,
 			RK3328_CLKGATE_CON(1), 13, GFLAGS,
-			&rk3328_spdif_fracmux),
+			&rk3328_spdif_fracmux, RK3328_SPDIF_FRAC_MAX_PRATE),
 
 	/* PD_UART */
 	COMPOSITE(0, "clk_uart0_div", mux_2plls_u480m_p, 0,
@@ -423,15 +426,15 @@  enum rk3328_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart0_frac", "clk_uart0_div", CLK_SET_RATE_PARENT,
 			RK3328_CLKSEL_CON(15), 0,
 			RK3328_CLKGATE_CON(1), 15, GFLAGS,
-			&rk3328_uart0_fracmux),
+			&rk3328_uart0_fracmux, RK3328_UART_FRAC_MAX_PRATE),
 	COMPOSITE_FRACMUX(0, "clk_uart1_frac", "clk_uart1_div", CLK_SET_RATE_PARENT,
 			RK3328_CLKSEL_CON(17), 0,
 			RK3328_CLKGATE_CON(2), 1, GFLAGS,
-			&rk3328_uart1_fracmux),
+			&rk3328_uart1_fracmux, RK3328_UART_FRAC_MAX_PRATE),
 	COMPOSITE_FRACMUX(0, "clk_uart2_frac", "clk_uart2_div", CLK_SET_RATE_PARENT,
 			RK3328_CLKSEL_CON(19), 0,
 			RK3328_CLKGATE_CON(2), 3, GFLAGS,
-			&rk3328_uart2_fracmux),
+			&rk3328_uart2_fracmux, RK3328_UART_FRAC_MAX_PRATE),
 
 	/*
 	 * Clock-Architecture Diagram 4
diff --git a/drivers/clk/rockchip/clk-rk3368.c b/drivers/clk/rockchip/clk-rk3368.c
index 55443349439b..d20e51dabb63 100644
--- a/drivers/clk/rockchip/clk-rk3368.c
+++ b/drivers/clk/rockchip/clk-rk3368.c
@@ -12,6 +12,9 @@ 
 #include "clk.h"
 
 #define RK3368_GRF_SOC_STATUS0	0x480
+#define RK3368_I2S_FRAC_MAX_PRATE       600000000
+#define RK3368_UART_FRAC_MAX_PRATE	600000000
+#define RK3368_SPDIF_FRAC_MAX_PRATE	600000000
 
 enum rk3368_plls {
 	apllb, aplll, dpll, cpll, gpll, npll,
@@ -368,7 +371,7 @@  enum rk3368_plls {
 	COMPOSITE_FRACMUX(0, "i2s_8ch_frac", "i2s_8ch_src", CLK_SET_RATE_PARENT,
 			  RK3368_CLKSEL_CON(28), 0,
 			  RK3368_CLKGATE_CON(6), 2, GFLAGS,
-			  &rk3368_i2s_8ch_fracmux),
+			  &rk3368_i2s_8ch_fracmux, RK3368_I2S_FRAC_MAX_PRATE),
 	COMPOSITE_NODIV(SCLK_I2S_8CH_OUT, "i2s_8ch_clkout", mux_i2s_8ch_clkout_p, 0,
 			RK3368_CLKSEL_CON(27), 15, 1, MFLAGS,
 			RK3368_CLKGATE_CON(6), 0, GFLAGS),
@@ -380,7 +383,7 @@  enum rk3368_plls {
 	COMPOSITE_FRACMUX(0, "spdif_8ch_frac", "spdif_8ch_src", CLK_SET_RATE_PARENT,
 			  RK3368_CLKSEL_CON(32), 0,
 			  RK3368_CLKGATE_CON(6), 5, GFLAGS,
-			  &rk3368_spdif_8ch_fracmux),
+			  &rk3368_spdif_8ch_fracmux, RK3368_SPDIF_FRAC_MAX_PRATE),
 	GATE(SCLK_SPDIF_8CH, "sclk_spdif_8ch", "spdif_8ch_pre", CLK_SET_RATE_PARENT,
 	     RK3368_CLKGATE_CON(6), 6, GFLAGS),
 	COMPOSITE(0, "i2s_2ch_src", mux_pll_src_cpll_gpll_p, 0,
@@ -389,7 +392,7 @@  enum rk3368_plls {
 	COMPOSITE_FRACMUX(0, "i2s_2ch_frac", "i2s_2ch_src", CLK_SET_RATE_PARENT,
 			  RK3368_CLKSEL_CON(54), 0,
 			  RK3368_CLKGATE_CON(5), 14, GFLAGS,
-			  &rk3368_i2s_2ch_fracmux),
+			  &rk3368_i2s_2ch_fracmux, RK3368_I2S_FRAC_MAX_PRATE),
 	GATE(SCLK_I2S_2CH, "sclk_i2s_2ch", "i2s_2ch_pre", CLK_SET_RATE_PARENT,
 	     RK3368_CLKGATE_CON(5), 15, GFLAGS),
 
@@ -590,7 +593,7 @@  enum rk3368_plls {
 	COMPOSITE_FRACMUX(0, "uart0_frac", "uart0_src", CLK_SET_RATE_PARENT,
 			  RK3368_CLKSEL_CON(34), 0,
 			  RK3368_CLKGATE_CON(2), 1, GFLAGS,
-			  &rk3368_uart0_fracmux),
+			  &rk3368_uart0_fracmux, RK3368_UART_FRAC_MAX_PRATE),
 
 	COMPOSITE_NOMUX(0, "uart1_src", "uart_src", 0,
 			RK3368_CLKSEL_CON(35), 0, 7, DFLAGS,
@@ -598,7 +601,7 @@  enum rk3368_plls {
 	COMPOSITE_FRACMUX(0, "uart1_frac", "uart1_src", CLK_SET_RATE_PARENT,
 			  RK3368_CLKSEL_CON(36), 0,
 			  RK3368_CLKGATE_CON(2), 3, GFLAGS,
-			  &rk3368_uart1_fracmux),
+			  &rk3368_uart1_fracmux, RK3368_UART_FRAC_MAX_PRATE),
 
 	COMPOSITE_NOMUX(0, "uart3_src", "uart_src", 0,
 			RK3368_CLKSEL_CON(39), 0, 7, DFLAGS,
@@ -606,7 +609,7 @@  enum rk3368_plls {
 	COMPOSITE_FRACMUX(0, "uart3_frac", "uart3_src", CLK_SET_RATE_PARENT,
 			  RK3368_CLKSEL_CON(40), 0,
 			  RK3368_CLKGATE_CON(2), 7, GFLAGS,
-			  &rk3368_uart3_fracmux),
+			  &rk3368_uart3_fracmux, RK3368_UART_FRAC_MAX_PRATE),
 
 	COMPOSITE_NOMUX(0, "uart4_src", "uart_src", 0,
 			RK3368_CLKSEL_CON(41), 0, 7, DFLAGS,
@@ -614,7 +617,7 @@  enum rk3368_plls {
 	COMPOSITE_FRACMUX(0, "uart4_frac", "uart4_src", CLK_SET_RATE_PARENT,
 			  RK3368_CLKSEL_CON(42), 0,
 			  RK3368_CLKGATE_CON(2), 9, GFLAGS,
-			  &rk3368_uart4_fracmux),
+			  &rk3368_uart4_fracmux, RK3368_UART_FRAC_MAX_PRATE),
 
 	COMPOSITE(0, "mac_pll_src", mux_pll_src_npll_cpll_gpll_p, 0,
 			RK3368_CLKSEL_CON(43), 6, 2, MFLAGS, 0, 5, DFLAGS,
diff --git a/drivers/clk/rockchip/clk-rk3399.c b/drivers/clk/rockchip/clk-rk3399.c
index ce1d2446f142..bda5d50c5319 100644
--- a/drivers/clk/rockchip/clk-rk3399.c
+++ b/drivers/clk/rockchip/clk-rk3399.c
@@ -13,6 +13,12 @@ 
 #include <dt-bindings/clock/rk3399-cru.h>
 #include "clk.h"
 
+#define RK3399_I2S_FRAC_MAX_PRATE       800000000
+#define RK3399_UART_FRAC_MAX_PRATE	800000000
+#define RK3399_SPDIF_FRAC_MAX_PRATE	600000000
+#define RK3399_VOP_FRAC_MAX_PRATE	600000000
+#define RK3399_WIFI_FRAC_MAX_PRATE	600000000
+
 enum rk3399_plls {
 	lpll, bpll, dpll, cpll, gpll, npll, vpll,
 };
@@ -582,7 +588,7 @@  enum rk3399_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_spdif_frac", "clk_spdif_div", 0,
 			RK3399_CLKSEL_CON(99), 0,
 			RK3399_CLKGATE_CON(8), 14, GFLAGS,
-			&rk3399_spdif_fracmux),
+			&rk3399_spdif_fracmux, RK3399_SPDIF_FRAC_MAX_PRATE),
 	GATE(SCLK_SPDIF_8CH, "clk_spdif", "clk_spdif_mux", CLK_SET_RATE_PARENT,
 			RK3399_CLKGATE_CON(8), 15, GFLAGS),
 
@@ -596,7 +602,7 @@  enum rk3399_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s0_frac", "clk_i2s0_div", 0,
 			RK3399_CLKSEL_CON(96), 0,
 			RK3399_CLKGATE_CON(8), 4, GFLAGS,
-			&rk3399_i2s0_fracmux),
+			&rk3399_i2s0_fracmux, RK3399_I2S_FRAC_MAX_PRATE),
 	GATE(SCLK_I2S0_8CH, "clk_i2s0", "clk_i2s0_mux", CLK_SET_RATE_PARENT,
 			RK3399_CLKGATE_CON(8), 5, GFLAGS),
 
@@ -606,7 +612,7 @@  enum rk3399_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s1_frac", "clk_i2s1_div", 0,
 			RK3399_CLKSEL_CON(97), 0,
 			RK3399_CLKGATE_CON(8), 7, GFLAGS,
-			&rk3399_i2s1_fracmux),
+			&rk3399_i2s1_fracmux, RK3399_I2S_FRAC_MAX_PRATE),
 	GATE(SCLK_I2S1_8CH, "clk_i2s1", "clk_i2s1_mux", CLK_SET_RATE_PARENT,
 			RK3399_CLKGATE_CON(8), 8, GFLAGS),
 
@@ -616,7 +622,7 @@  enum rk3399_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_i2s2_frac", "clk_i2s2_div", 0,
 			RK3399_CLKSEL_CON(98), 0,
 			RK3399_CLKGATE_CON(8), 10, GFLAGS,
-			&rk3399_i2s2_fracmux),
+			&rk3399_i2s2_fracmux, RK3399_I2S_FRAC_MAX_PRATE),
 	GATE(SCLK_I2S2_8CH, "clk_i2s2", "clk_i2s2_mux", CLK_SET_RATE_PARENT,
 			RK3399_CLKGATE_CON(8), 11, GFLAGS),
 
@@ -635,7 +641,7 @@  enum rk3399_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart0_frac", "clk_uart0_div", 0,
 			RK3399_CLKSEL_CON(100), 0,
 			RK3399_CLKGATE_CON(9), 1, GFLAGS,
-			&rk3399_uart0_fracmux),
+			&rk3399_uart0_fracmux, RK3399_UART_FRAC_MAX_PRATE),
 
 	MUX(0, "clk_uart_src", mux_pll_src_cpll_gpll_p, 0,
 			RK3399_CLKSEL_CON(33), 15, 1, MFLAGS),
@@ -645,7 +651,7 @@  enum rk3399_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart1_frac", "clk_uart1_div", 0,
 			RK3399_CLKSEL_CON(101), 0,
 			RK3399_CLKGATE_CON(9), 3, GFLAGS,
-			&rk3399_uart1_fracmux),
+			&rk3399_uart1_fracmux, RK3399_UART_FRAC_MAX_PRATE),
 
 	COMPOSITE_NOMUX(0, "clk_uart2_div", "clk_uart_src", 0,
 			RK3399_CLKSEL_CON(35), 0, 7, DFLAGS,
@@ -653,7 +659,7 @@  enum rk3399_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart2_frac", "clk_uart2_div", 0,
 			RK3399_CLKSEL_CON(102), 0,
 			RK3399_CLKGATE_CON(9), 5, GFLAGS,
-			&rk3399_uart2_fracmux),
+			&rk3399_uart2_fracmux, RK3399_UART_FRAC_MAX_PRATE),
 
 	COMPOSITE_NOMUX(0, "clk_uart3_div", "clk_uart_src", 0,
 			RK3399_CLKSEL_CON(36), 0, 7, DFLAGS,
@@ -661,7 +667,7 @@  enum rk3399_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart3_frac", "clk_uart3_div", 0,
 			RK3399_CLKSEL_CON(103), 0,
 			RK3399_CLKGATE_CON(9), 7, GFLAGS,
-			&rk3399_uart3_fracmux),
+			&rk3399_uart3_fracmux, RK3399_UART_FRAC_MAX_PRATE),
 
 	COMPOSITE(PCLK_DDR, "pclk_ddr", mux_pll_src_cpll_gpll_p, CLK_IGNORE_UNUSED,
 			RK3399_CLKSEL_CON(6), 15, 1, MFLAGS, 8, 5, DFLAGS,
@@ -1164,7 +1170,7 @@  enum rk3399_pmu_plls {
 
 	COMPOSITE_FRACMUX_NOGATE(DCLK_VOP0_FRAC, "dclk_vop0_frac", "dclk_vop0_div", 0,
 			RK3399_CLKSEL_CON(106), 0,
-			&rk3399_dclk_vop0_fracmux),
+			&rk3399_dclk_vop0_fracmux, RK3399_VOP_FRAC_MAX_PRATE),
 
 	COMPOSITE(SCLK_VOP0_PWM, "clk_vop0_pwm", mux_pll_src_vpll_cpll_gpll_24m_p, 0,
 			RK3399_CLKSEL_CON(51), 6, 2, MFLAGS, 0, 5, DFLAGS,
@@ -1194,7 +1200,7 @@  enum rk3399_pmu_plls {
 
 	COMPOSITE_FRACMUX_NOGATE(DCLK_VOP1_FRAC, "dclk_vop1_frac", "dclk_vop1_div", 0,
 			RK3399_CLKSEL_CON(107), 0,
-			&rk3399_dclk_vop1_fracmux),
+			&rk3399_dclk_vop1_fracmux, RK3399_VOP_FRAC_MAX_PRATE),
 
 	COMPOSITE(SCLK_VOP1_PWM, "clk_vop1_pwm", mux_pll_src_vpll_cpll_gpll_24m_p, CLK_IGNORE_UNUSED,
 			RK3399_CLKSEL_CON(52), 6, 2, MFLAGS, 0, 5, DFLAGS,
@@ -1311,7 +1317,7 @@  enum rk3399_pmu_plls {
 			RK3399_CLKSEL_CON(58), 7, 1, MFLAGS),
 	COMPOSITE_FRAC(0, "clk_test_frac", "clk_test_pre", 0,
 			RK3399_CLKSEL_CON(105), 0,
-			RK3399_CLKGATE_CON(13), 9, GFLAGS),
+			RK3399_CLKGATE_CON(13), 9, GFLAGS, 0),
 
 	DIV(0, "clk_test_24m", "xin24m", 0,
 			RK3399_CLKSEL_CON(57), 6, 10, DFLAGS),
@@ -1416,7 +1422,7 @@  enum rk3399_pmu_plls {
 
 	COMPOSITE_FRACMUX_NOGATE(0, "clk_wifi_frac", "clk_wifi_div", 0,
 			RK3399_PMU_CLKSEL_CON(7), 0,
-			&rk3399_pmuclk_wifi_fracmux),
+			&rk3399_pmuclk_wifi_fracmux, RK3399_WIFI_FRAC_MAX_PRATE),
 
 	MUX(0, "clk_timer_src_pmu", mux_pll_p, CLK_IGNORE_UNUSED,
 			RK3399_PMU_CLKSEL_CON(1), 15, 1, MFLAGS),
@@ -1445,7 +1451,7 @@  enum rk3399_pmu_plls {
 	COMPOSITE_FRACMUX(0, "clk_uart4_frac", "clk_uart4_div", 0,
 			RK3399_PMU_CLKSEL_CON(6), 0,
 			RK3399_PMU_CLKGATE_CON(0), 6, GFLAGS,
-			&rk3399_uart4_pmu_fracmux),
+			&rk3399_uart4_pmu_fracmux, RK3399_UART_FRAC_MAX_PRATE),
 
 	DIV(PCLK_SRC_PMU, "pclk_pmu_src", "ppll", CLK_IGNORE_UNUSED,
 			RK3399_PMU_CLKSEL_CON(0), 0, 5, DFLAGS),
diff --git a/drivers/clk/rockchip/clk-rv1108.c b/drivers/clk/rockchip/clk-rv1108.c
index 5947d3192866..04b7f1161942 100644
--- a/drivers/clk/rockchip/clk-rv1108.c
+++ b/drivers/clk/rockchip/clk-rv1108.c
@@ -14,6 +14,8 @@ 
 #include "clk.h"
 
 #define RV1108_GRF_SOC_STATUS0	0x480
+#define RV1108_I2S_FRAC_MAX_RATE	600000000
+#define RV1108_UART_FRAC_MAX_RATE	600000000
 
 enum rv1108_plls {
 	apll, dpll, gpll,
@@ -503,7 +505,7 @@  enum rv1108_plls {
 	COMPOSITE_FRACMUX(0, "i2s0_frac", "i2s0_src", CLK_SET_RATE_PARENT,
 			RV1108_CLKSEL_CON(8), 0,
 			RV1108_CLKGATE_CON(2), 1, GFLAGS,
-			&rv1108_i2s0_fracmux),
+			&rv1108_i2s0_fracmux, RV1108_I2S_FRAC_MAX_RATE),
 	GATE(SCLK_I2S0, "sclk_i2s0", "i2s0_pre", CLK_SET_RATE_PARENT,
 			RV1108_CLKGATE_CON(2), 2, GFLAGS),
 	COMPOSITE_NODIV(0, "i2s_out", mux_i2s_out_p, 0,
@@ -516,7 +518,7 @@  enum rv1108_plls {
 	COMPOSITE_FRACMUX(0, "i2s1_frac", "i2s1_src", CLK_SET_RATE_PARENT,
 			RK2928_CLKSEL_CON(9), 0,
 			RK2928_CLKGATE_CON(2), 5, GFLAGS,
-			&rv1108_i2s1_fracmux),
+			&rv1108_i2s1_fracmux, RV1108_I2S_FRAC_MAX_RATE),
 	GATE(SCLK_I2S1, "sclk_i2s1", "i2s1_pre", CLK_SET_RATE_PARENT,
 			RV1108_CLKGATE_CON(2), 6, GFLAGS),
 
@@ -526,7 +528,7 @@  enum rv1108_plls {
 	COMPOSITE_FRACMUX(0, "i2s2_frac", "i2s2_src", CLK_SET_RATE_PARENT,
 			RV1108_CLKSEL_CON(10), 0,
 			RV1108_CLKGATE_CON(2), 9, GFLAGS,
-			&rv1108_i2s2_fracmux),
+			&rv1108_i2s2_fracmux, RV1108_I2S_FRAC_MAX_RATE),
 	GATE(SCLK_I2S2, "sclk_i2s2", "i2s2_pre", CLK_SET_RATE_PARENT,
 			RV1108_CLKGATE_CON(2), 10, GFLAGS),
 
@@ -592,15 +594,15 @@  enum rv1108_plls {
 	COMPOSITE_FRACMUX(0, "uart0_frac", "uart0_src", CLK_SET_RATE_PARENT,
 			RV1108_CLKSEL_CON(16), 0,
 			RV1108_CLKGATE_CON(3), 2, GFLAGS,
-			&rv1108_uart0_fracmux),
+			&rv1108_uart0_fracmux, RV1108_UART_FRAC_MAX_RATE),
 	COMPOSITE_FRACMUX(0, "uart1_frac", "uart1_src", CLK_SET_RATE_PARENT,
 			RV1108_CLKSEL_CON(17), 0,
 			RV1108_CLKGATE_CON(3), 4, GFLAGS,
-			&rv1108_uart1_fracmux),
+			&rv1108_uart1_fracmux, RV1108_UART_FRAC_MAX_RATE),
 	COMPOSITE_FRACMUX(0, "uart2_frac", "uart2_src", CLK_SET_RATE_PARENT,
 			RV1108_CLKSEL_CON(18), 0,
 			RV1108_CLKGATE_CON(3), 6, GFLAGS,
-			&rv1108_uart2_fracmux),
+			&rv1108_uart2_fracmux, RV1108_UART_FRAC_MAX_RATE),
 	GATE(PCLK_UART0, "pclk_uart0", "pclk_bus_pre", 0,
 			RV1108_CLKGATE_CON(13), 10, GFLAGS),
 	GATE(PCLK_UART1, "pclk_uart1", "pclk_bus_pre", 0,
diff --git a/drivers/clk/rockchip/clk.c b/drivers/clk/rockchip/clk.c
index 546e810c3560..fac5a4a3f5c3 100644
--- a/drivers/clk/rockchip/clk.c
+++ b/drivers/clk/rockchip/clk.c
@@ -184,12 +184,26 @@  static void rockchip_fractional_approximation(struct clk_hw *hw,
 	unsigned long p_rate, p_parent_rate;
 	struct clk_hw *p_parent;
 	unsigned long scale;
+	u32 div;
 
 	p_rate = clk_hw_get_rate(clk_hw_get_parent(hw));
-	if ((rate * 20 > p_rate) && (p_rate % rate != 0)) {
+	if (((rate * 20 > p_rate) && (p_rate % rate != 0)) ||
+	    (fd->max_prate && fd->max_prate < p_rate)) {
 		p_parent = clk_hw_get_parent(clk_hw_get_parent(hw));
 		p_parent_rate = clk_hw_get_rate(p_parent);
 		*parent_rate = p_parent_rate;
+		if (fd->max_prate && p_parent_rate > fd->max_prate) {
+			div = DIV_ROUND_UP(p_parent_rate, fd->max_prate);
+			*parent_rate = p_parent_rate / div;
+		}
+
+		if (*parent_rate < rate * 20) {
+			pr_err("%s parent_rate(%ld) is low than rate(%ld)*20, fractional div is not allowed\n",
+			       clk_hw_get_name(hw), *parent_rate, rate);
+			*m = 0;
+			*n = 1;
+			return;
+		}
 	}
 
 	/*
@@ -212,7 +226,7 @@  static struct clk *rockchip_clk_register_frac_branch(
 		void __iomem *base, int muxdiv_offset, u8 div_flags,
 		int gate_offset, u8 gate_shift, u8 gate_flags,
 		unsigned long flags, struct rockchip_clk_branch *child,
-		spinlock_t *lock)
+		unsigned long max_prate, spinlock_t *lock)
 {
 	struct rockchip_clk_frac *frac;
 	struct clk *clk;
@@ -253,6 +267,7 @@  static struct clk *rockchip_clk_register_frac_branch(
 	div->nmask = GENMASK(div->nwidth - 1, 0) << div->nshift;
 	div->lock = lock;
 	div->approximation = rockchip_fractional_approximation;
+	div->max_prate = max_prate;
 	div_ops = &clk_fractional_divider_ops;
 
 	clk = clk_register_composite(NULL, name, parent_names, num_parents,
@@ -485,7 +500,7 @@  void __init rockchip_clk_register_branches(
 				list->div_flags,
 				list->gate_offset, list->gate_shift,
 				list->gate_flags, flags, list->child,
-				&ctx->lock);
+				list->max_prate, &ctx->lock);
 			break;
 		case branch_half_divider:
 			clk = rockchip_clk_register_halfdiv(list->name,
diff --git a/drivers/clk/rockchip/clk.h b/drivers/clk/rockchip/clk.h
index 2271a84124b0..0d401ce09a54 100644
--- a/drivers/clk/rockchip/clk.h
+++ b/drivers/clk/rockchip/clk.h
@@ -420,6 +420,7 @@  struct rockchip_clk_branch {
 	u8				gate_shift;
 	u8				gate_flags;
 	struct rockchip_clk_branch	*child;
+	unsigned long			max_prate;
 };
 
 #define COMPOSITE(_id, cname, pnames, f, mo, ms, mw, mf, ds, dw,\
@@ -559,7 +560,7 @@  struct rockchip_clk_branch {
 		.gate_offset	= -1,				\
 	}
 
-#define COMPOSITE_FRAC(_id, cname, pname, f, mo, df, go, gs, gf)\
+#define COMPOSITE_FRAC(_id, cname, pname, f, mo, df, go, gs, gf, prate)\
 	{							\
 		.id		= _id,				\
 		.branch_type	= branch_fraction_divider,	\
@@ -574,9 +575,10 @@  struct rockchip_clk_branch {
 		.gate_offset	= go,				\
 		.gate_shift	= gs,				\
 		.gate_flags	= gf,				\
+		.max_prate	= prate,			\
 	}
 
-#define COMPOSITE_FRACMUX(_id, cname, pname, f, mo, df, go, gs, gf, ch) \
+#define COMPOSITE_FRACMUX(_id, cname, pname, f, mo, df, go, gs, gf, ch, prate) \
 	{							\
 		.id		= _id,				\
 		.branch_type	= branch_fraction_divider,	\
@@ -592,9 +594,10 @@  struct rockchip_clk_branch {
 		.gate_shift	= gs,				\
 		.gate_flags	= gf,				\
 		.child		= ch,				\
+		.max_prate	= prate,			\
 	}
 
-#define COMPOSITE_FRACMUX_NOGATE(_id, cname, pname, f, mo, df, ch) \
+#define COMPOSITE_FRACMUX_NOGATE(_id, cname, pname, f, mo, df, ch, prate) \
 	{							\
 		.id		= _id,				\
 		.branch_type	= branch_fraction_divider,	\
@@ -608,6 +611,7 @@  struct rockchip_clk_branch {
 		.div_flags	= df,				\
 		.gate_offset	= -1,				\
 		.child		= ch,				\
+		.max_prate	= prate,			\
 	}
 
 #define COMPOSITE_DDRCLK(_id, cname, pnames, f, mo, ms, mw,	\
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 2ae7604783dd..30993c0630a3 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -624,6 +624,7 @@  struct clk_hw *clk_hw_register_fixed_factor(struct device *dev,
  * @mwidth:	width of the numerator bit field
  * @nshift:	shift to the denominator bit field
  * @nwidth:	width of the denominator bit field
+ * @max_parent:	the maximum frequency of fractional divider parent clock
  * @lock:	register lock
  *
  * Clock with adjustable fractional divider affecting its output frequency.
@@ -647,6 +648,7 @@  struct clk_fractional_divider {
 	u8		nwidth;
 	u32		nmask;
 	u8		flags;
+	unsigned long	max_prate;
 	void		(*approximation)(struct clk_hw *hw,
 				unsigned long rate, unsigned long *parent_rate,
 				unsigned long *m, unsigned long *n);