[PATCH 0/2] i2c/clk: spacemit: k1: fix bus configuration and clock handling

[PATCH 0/2] i2c/clk: spacemit: k1: fix bus configuration and clock handling

[Junhui Liu]

Fix two issues in the SpacemiT K1 I2C driver and clock provider.

The first patch configures the controller bus mode using the requested
I2C bus speed from the device tree, instead of incorrectly using the
functional clock rate.

The second patch separates the functional and bus clocks in the K1
clock provider and updates the I2C driver to enable all clocks described
by the device tree. It also adds the clock dependencies required by
TWSI2 and TWSI8 in SPL.

Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
---
Junhui Liu (2):
      i2c: k1: fix wrong bus speed setting
      i2c: k1: enable all clocks for I2C controllers

 drivers/clk/spacemit/clk-k1.c | 41 +++++++++++++++++++++++++++++++++--------
 drivers/i2c/k1_i2c.c          | 19 ++++++++++---------
 2 files changed, 43 insertions(+), 17 deletions(-)
---
base-commit: 527115ef6783cec49e5610c523c124b399011361
change-id: 20260814-k1-i2c-fix-04dc9e3fd45a

Best regards,
--  
Junhui Liu <junhui.liu@pigmoral.tech>

[PATCH 1/2] i2c: k1: fix wrong bus speed setting

[Junhui Liu]

The controller bus mode should be selected according to the requested
I2C bus speed. However, the driver currently passes the functional clock
rate to k1_i2c_set_bus_speed(), so the selected mode does not reflect
the requested bus speed.

Fix this by reading the clock-frequency property from the Device Tree,
defaulting to standard speed, and drop the unused clk_rate field.

Fixes: 271546fb8e54 ("i2c: k1: add I2C driver support")
Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
---
 drivers/i2c/k1_i2c.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/i2c/k1_i2c.c b/drivers/i2c/k1_i2c.c
index a08ff15803d0..2c7a1e0d3775 100644
--- a/drivers/i2c/k1_i2c.c
+++ b/drivers/i2c/k1_i2c.c
@@ -52,7 +52,6 @@ struct k1_i2c_priv {
 	int id;
 	void __iomem *base;
 	struct clk clk;
-	u32 clk_rate;
 };
 
 /*
@@ -466,6 +465,7 @@ static int k1_i2c_probe(struct udevice *bus)
 {
 	struct k1_i2c_priv *priv = dev_get_priv(bus);
 	struct reset_ctl reset;
+	u32 speed;
 	int ret;
 
 	priv->id = dev_seq(bus);
@@ -496,10 +496,13 @@ static int k1_i2c_probe(struct udevice *bus)
 		debug("%s: failed to enable clock\n", __func__);
 		return ret;
 	}
-	priv->clk_rate = clk_get_rate(&priv->clk);
 
 	priv->base = (void *)devfdt_get_addr_ptr(bus);
-	k1_i2c_set_bus_speed(bus, priv->clk_rate);
+
+	speed = dev_read_u32_default(bus, "clock-frequency",
+				     I2C_SPEED_STANDARD_RATE);
+	k1_i2c_set_bus_speed(bus, speed);
+
 	return 0;
 }
 

-- 
2.55.0

[PATCH 2/2] i2c: k1: enable all clocks for I2C controllers

[Junhui Liu]

The K1 clock driver modeled the bus clock enable bit as part of the
functional clock for regular TWSI controllers. The I2C driver then only
enabled the functional clock, ignoring the separate bus clock described
by the device tree. Although this happened to work, it did not match the
hardware clock topology or the device tree binding.

Model the functional and bus clocks separately and make the I2C driver
acquire and enable all clocks provided by the device tree. Also add the
TWSI2 and TWSI8 bus clocks, together with their APB clock dependencies,
to the SPL clock tree.

Keep the combined functional and bus gate for TWSI8, whose clock control
register is write-only, and retain its bus clock as a fixed-factor
placeholder.

The clock-provider and I2C-consumer changes should be applied together,
as either change on its own would leave I2C unusable.

Fixes: 3aa2882a3e1a ("clk: spacemit: Add support for K1 SoC")
Fixes: 271546fb8e54 ("i2c: k1: add I2C driver support")
Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
---
 drivers/clk/spacemit/clk-k1.c | 41 +++++++++++++++++++++++++++++++++--------
 drivers/i2c/k1_i2c.c          | 10 ++++------
 2 files changed, 37 insertions(+), 14 deletions(-)

diff --git a/drivers/clk/spacemit/clk-k1.c b/drivers/clk/spacemit/clk-k1.c
index 07adc126ee39..20b8595aa3c4 100644
--- a/drivers/clk/spacemit/clk-k1.c
+++ b/drivers/clk/spacemit/clk-k1.c
@@ -154,11 +154,27 @@ CCU_GATE_DEFINE(CLK_PLL1_409P6, pll1_d6_409p6, pll1_d6_409p6, "pll1_d6",
 		MPMU_ACGR, BIT(0), 0);
 CCU_GATE_DEFINE(CLK_PLL1_307P2, pll1_d8_307p2, pll1_d8_307p2, "pll1_d8",
 		MPMU_ACGR, BIT(13), 0);
+CCU_FACTOR_GATE_DEFINE(CLK_PLL1_102P4, pll1_d24_102p4, pll1_d24_102p4,
+		       "pll1_d8", MPMU_ACGR, BIT(12), 3, 1);
+CCU_FACTOR_GATE_DEFINE(CLK_PLL1_51P2, pll1_d48_51p2, pll1_d48_51p2,
+		       "pll1_d8", MPMU_ACGR, BIT(7), 6, 1);
+CCU_FACTOR_GATE_DEFINE(CLK_PLL1_25P6, pll1_d96_25p6, pll1_d96_25p6,
+		       "pll1_d8", MPMU_ACGR, BIT(4), 12, 1);
 CCU_FACTOR_GATE_DEFINE(CLK_PLL1_31P5, pll1_d78_31p5, pll1_d78_31p5,
 		       "pll1_d4", MPMU_ACGR, BIT(6), 39, 2);
 CCU_DDN_DEFINE(CLK_SLOW_UART2, slow_uart2_48, slow_uart2_48,
 	       "pll1_d4_614p4", MPMU_SUCCR_1,
 	       CCU_DDN_MASK(16, 13), 16, CCU_DDN_MASK(0, 13), 0, 2, 0);
+
+static const char * const apb_parents[] = {
+	"pll1_d96_25p6",
+	"pll1_d48_51p2",
+	"pll1_d96_25p6",
+	"pll1_d24_102p4",
+};
+
+CCU_MUX_DEFINE(CLK_APB, apb_clk, apb_clk, apb_parents, ARRAY_SIZE(apb_parents),
+	       MPMU_APBCSCR, 0, 2, 0);
 #else
 CCU_GATE_DEFINE(CLK_PLL1_307P2, pll1_d8_307p2, pll1_d8_307p2, "pll1_d8",
 		MPMU_ACGR, BIT(13), 0);
@@ -298,7 +314,7 @@ static const char * const twsi_parents[] = {
 
 CCU_MUX_GATE_DEFINE(CLK_TWSI2, twsi2_clk, twsi2_clk, twsi_parents,
 		    ARRAY_SIZE(twsi_parents), APBC_TWSI2_CLK_RST,
-		    4, 3, BIT(1) | BIT(0), 0);
+		    4, 3, BIT(1), 0);
 /*
  * APBC_TWSI8_CLK_RST has a quirk that reading always results in zero.
  * Combine functional and bus bits together as a gate to avoid sharing the
@@ -306,6 +322,9 @@ CCU_MUX_GATE_DEFINE(CLK_TWSI2, twsi2_clk, twsi2_clk, twsi_parents,
  */
 CCU_GATE_DEFINE(CLK_TWSI8, twsi8_clk, twsi8_clk, "pll1_d78_31p5",
 		APBC_TWSI8_CLK_RST, BIT(1) | BIT(0), 0);
+CCU_GATE_DEFINE(CLK_TWSI2_BUS, twsi2_bus_clk, twsi2_bus_clk, "apb_clk",
+		APBC_TWSI2_CLK_RST, BIT(0), 0);
+CCU_FACTOR_DEFINE(CLK_TWSI8_BUS, twsi8_bus_clk, twsi8_bus_clk, "apb_clk", 1, 1);
 
 #else
 static const char * const uart_clk_parents[] = {
@@ -326,7 +345,7 @@ static const char * const twsi_parents[] = {
 
 CCU_MUX_GATE_DEFINE(CLK_TWSI2, twsi2_clk, twsi2_clk, twsi_parents,
 		    ARRAY_SIZE(twsi_parents), APBC_TWSI2_CLK_RST,
-		    4, 3, BIT(1) | BIT(0), 0);
+		    4, 3, BIT(1), 0);
 /*
  * APBC_TWSI8_CLK_RST has a quirk that reading always results in zero.
  * Combine functional and bus bits together as a gate to avoid sharing the
@@ -448,22 +467,22 @@ CCU_GATE_DEFINE(CLK_RTC, rtc_clk, rtc_clk, "clock-32k", APBC_RTC_CLK_RST,
 
 CCU_MUX_GATE_DEFINE(CLK_TWSI0, twsi0_clk, twsi0_clk, twsi_parents,
 		    ARRAY_SIZE(twsi_parents), APBC_TWSI0_CLK_RST,
-		    4, 3, BIT(1) | BIT(0), 0);
+		    4, 3, BIT(1), 0);
 CCU_MUX_GATE_DEFINE(CLK_TWSI1, twsi1_clk, twsi1_clk, twsi_parents,
 		    ARRAY_SIZE(twsi_parents), APBC_TWSI1_CLK_RST,
-		    4, 3, BIT(1) | BIT(0), 0);
+		    4, 3, BIT(1), 0);
 CCU_MUX_GATE_DEFINE(CLK_TWSI4, twsi4_clk, twsi4_clk, twsi_parents,
 		    ARRAY_SIZE(twsi_parents), APBC_TWSI4_CLK_RST,
-		    4, 3, BIT(1) | BIT(0), 0);
+		    4, 3, BIT(1), 0);
 CCU_MUX_GATE_DEFINE(CLK_TWSI5, twsi5_clk, twsi5_clk, twsi_parents,
 		    ARRAY_SIZE(twsi_parents), APBC_TWSI5_CLK_RST,
-		    4, 3, BIT(1) | BIT(0), 0);
+		    4, 3, BIT(1), 0);
 CCU_MUX_GATE_DEFINE(CLK_TWSI6, twsi6_clk, twsi6_clk, twsi_parents,
 		    ARRAY_SIZE(twsi_parents), APBC_TWSI6_CLK_RST,
-		    4, 3, BIT(1) | BIT(0), 0);
+		    4, 3, BIT(1), 0);
 CCU_MUX_GATE_DEFINE(CLK_TWSI7, twsi7_clk, twsi7_clk, twsi_parents,
 		    ARRAY_SIZE(twsi_parents), APBC_TWSI7_CLK_RST,
-		    4, 3, BIT(1) | BIT(0), 0);
+		    4, 3, BIT(1), 0);
 
 static const char * const timer_parents[] = {
 	"pll1_d192_12p8",
@@ -1232,8 +1251,12 @@ static struct clk *k1_ccu_mpmu_clks[] = {
 	&pll1_d4_614p4.common.clk,
 	&pll1_d6_409p6.common.clk,
 	&pll1_d8_307p2.common.clk,
+	&pll1_d24_102p4.common.clk,
+	&pll1_d48_51p2.common.clk,
+	&pll1_d96_25p6.common.clk,
 	&pll1_d78_31p5.common.clk,
 	&slow_uart2_48.common.clk,
+	&apb_clk.common.clk,
 };
 #else
 static struct clk *k1_ccu_mpmu_clks[] = {
@@ -1288,6 +1311,8 @@ static struct clk *k1_ccu_apbc_clks[] = {
 	&uart0_clk.common.clk,
 	&twsi2_clk.common.clk,
 	&twsi8_clk.common.clk,
+	&twsi2_bus_clk.common.clk,
+	&twsi8_bus_clk.common.clk,
 };
 #else
 static struct clk *k1_ccu_apbc_clks[] = {
diff --git a/drivers/i2c/k1_i2c.c b/drivers/i2c/k1_i2c.c
index 2c7a1e0d3775..b11f73959a08 100644
--- a/drivers/i2c/k1_i2c.c
+++ b/drivers/i2c/k1_i2c.c
@@ -51,7 +51,7 @@ struct k1_i2c {
 struct k1_i2c_priv {
 	int id;
 	void __iomem *base;
-	struct clk clk;
+	struct clk_bulk clks;
 };
 
 /*
@@ -487,15 +487,13 @@ static int k1_i2c_probe(struct udevice *bus)
 		return ret;
 	}
 
-	ret = clk_get_by_index(bus, 0, &priv->clk);
+	ret = clk_get_bulk(bus, &priv->clks);
 	if (ret)
 		return ret;
 
-	ret = clk_enable(&priv->clk);
-	if (ret && ret != -ENOSYS && ret != -EOPNOTSUPP) {
-		debug("%s: failed to enable clock\n", __func__);
+	ret = clk_enable_bulk(&priv->clks);
+	if (ret)
 		return ret;
-	}
 
 	priv->base = (void *)devfdt_get_addr_ptr(bus);
 

-- 
2.55.0

Re: [PATCH 2/2] i2c: k1: enable all clocks for I2C controllers

[Yixun Lan]

On 09:46 Fri 14 Aug     , Junhui Liu wrote:
> The K1 clock driver modeled the bus clock enable bit as part of the
> functional clock for regular TWSI controllers. The I2C driver then only
> enabled the functional clock, ignoring the separate bus clock described
> by the device tree. Although this happened to work, it did not match the
> hardware clock topology or the device tree binding.
> 
> Model the functional and bus clocks separately and make the I2C driver
> acquire and enable all clocks provided by the device tree. Also add the
> TWSI2 and TWSI8 bus clocks, together with their APB clock dependencies,
> to the SPL clock tree.
> 
> Keep the combined functional and bus gate for TWSI8, whose clock control
> register is write-only, and retain its bus clock as a fixed-factor
> placeholder.
> 
> The clock-provider and I2C-consumer changes should be applied together,
> as either change on its own would leave I2C unusable.
> 
> Fixes: 3aa2882a3e1a ("clk: spacemit: Add support for K1 SoC")
> Fixes: 271546fb8e54 ("i2c: k1: add I2C driver support")
> Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
> ---
>  drivers/clk/spacemit/clk-k1.c | 41 +++++++++++++++++++++++++++++++++--------
>  drivers/i2c/k1_i2c.c          | 10 ++++------
I'd suggest to have separate patch for clock and i2c changes, as they
belong to different subsystem

>  2 files changed, 37 insertions(+), 14 deletions(-)
> 
> diff --git a/drivers/clk/spacemit/clk-k1.c b/drivers/clk/spacemit/clk-k1.c
> index 07adc126ee39..20b8595aa3c4 100644
> --- a/drivers/clk/spacemit/clk-k1.c
> +++ b/drivers/clk/spacemit/clk-k1.c
> @@ -154,11 +154,27 @@ CCU_GATE_DEFINE(CLK_PLL1_409P6, pll1_d6_409p6, pll1_d6_409p6, "pll1_d6",
>  		MPMU_ACGR, BIT(0), 0);
>  CCU_GATE_DEFINE(CLK_PLL1_307P2, pll1_d8_307p2, pll1_d8_307p2, "pll1_d8",
>  		MPMU_ACGR, BIT(13), 0);
> +CCU_FACTOR_GATE_DEFINE(CLK_PLL1_102P4, pll1_d24_102p4, pll1_d24_102p4,
> +		       "pll1_d8", MPMU_ACGR, BIT(12), 3, 1);
> +CCU_FACTOR_GATE_DEFINE(CLK_PLL1_51P2, pll1_d48_51p2, pll1_d48_51p2,
> +		       "pll1_d8", MPMU_ACGR, BIT(7), 6, 1);
> +CCU_FACTOR_GATE_DEFINE(CLK_PLL1_25P6, pll1_d96_25p6, pll1_d96_25p6,
> +		       "pll1_d8", MPMU_ACGR, BIT(4), 12, 1);
>  CCU_FACTOR_GATE_DEFINE(CLK_PLL1_31P5, pll1_d78_31p5, pll1_d78_31p5,
>  		       "pll1_d4", MPMU_ACGR, BIT(6), 39, 2);
>  CCU_DDN_DEFINE(CLK_SLOW_UART2, slow_uart2_48, slow_uart2_48,
>  	       "pll1_d4_614p4", MPMU_SUCCR_1,
>  	       CCU_DDN_MASK(16, 13), 16, CCU_DDN_MASK(0, 13), 0, 2, 0);
> +
> +static const char * const apb_parents[] = {
> +	"pll1_d96_25p6",
> +	"pll1_d48_51p2",
> +	"pll1_d96_25p6",
> +	"pll1_d24_102p4",
> +};
> +
> +CCU_MUX_DEFINE(CLK_APB, apb_clk, apb_clk, apb_parents, ARRAY_SIZE(apb_parents),
> +	       MPMU_APBCSCR, 0, 2, 0);
>  #else
>  CCU_GATE_DEFINE(CLK_PLL1_307P2, pll1_d8_307p2, pll1_d8_307p2, "pll1_d8",
>  		MPMU_ACGR, BIT(13), 0);
> @@ -298,7 +314,7 @@ static const char * const twsi_parents[] = {
>  
>  CCU_MUX_GATE_DEFINE(CLK_TWSI2, twsi2_clk, twsi2_clk, twsi_parents,
>  		    ARRAY_SIZE(twsi_parents), APBC_TWSI2_CLK_RST,
> -		    4, 3, BIT(1) | BIT(0), 0);
> +		    4, 3, BIT(1), 0);
>  /*
>   * APBC_TWSI8_CLK_RST has a quirk that reading always results in zero.
>   * Combine functional and bus bits together as a gate to avoid sharing the
> @@ -306,6 +322,9 @@ CCU_MUX_GATE_DEFINE(CLK_TWSI2, twsi2_clk, twsi2_clk, twsi_parents,
>   */
>  CCU_GATE_DEFINE(CLK_TWSI8, twsi8_clk, twsi8_clk, "pll1_d78_31p5",
>  		APBC_TWSI8_CLK_RST, BIT(1) | BIT(0), 0);
> +CCU_GATE_DEFINE(CLK_TWSI2_BUS, twsi2_bus_clk, twsi2_bus_clk, "apb_clk",
> +		APBC_TWSI2_CLK_RST, BIT(0), 0);
> +CCU_FACTOR_DEFINE(CLK_TWSI8_BUS, twsi8_bus_clk, twsi8_bus_clk, "apb_clk", 1, 1);
>  
>  #else
>  static const char * const uart_clk_parents[] = {
> @@ -326,7 +345,7 @@ static const char * const twsi_parents[] = {
>  
>  CCU_MUX_GATE_DEFINE(CLK_TWSI2, twsi2_clk, twsi2_clk, twsi_parents,
>  		    ARRAY_SIZE(twsi_parents), APBC_TWSI2_CLK_RST,
> -		    4, 3, BIT(1) | BIT(0), 0);
> +		    4, 3, BIT(1), 0);
>  /*
>   * APBC_TWSI8_CLK_RST has a quirk that reading always results in zero.
>   * Combine functional and bus bits together as a gate to avoid sharing the
> @@ -448,22 +467,22 @@ CCU_GATE_DEFINE(CLK_RTC, rtc_clk, rtc_clk, "clock-32k", APBC_RTC_CLK_RST,
>  
>  CCU_MUX_GATE_DEFINE(CLK_TWSI0, twsi0_clk, twsi0_clk, twsi_parents,
>  		    ARRAY_SIZE(twsi_parents), APBC_TWSI0_CLK_RST,
> -		    4, 3, BIT(1) | BIT(0), 0);
> +		    4, 3, BIT(1), 0);
>  CCU_MUX_GATE_DEFINE(CLK_TWSI1, twsi1_clk, twsi1_clk, twsi_parents,
>  		    ARRAY_SIZE(twsi_parents), APBC_TWSI1_CLK_RST,
> -		    4, 3, BIT(1) | BIT(0), 0);
> +		    4, 3, BIT(1), 0);
>  CCU_MUX_GATE_DEFINE(CLK_TWSI4, twsi4_clk, twsi4_clk, twsi_parents,
>  		    ARRAY_SIZE(twsi_parents), APBC_TWSI4_CLK_RST,
> -		    4, 3, BIT(1) | BIT(0), 0);
> +		    4, 3, BIT(1), 0);
>  CCU_MUX_GATE_DEFINE(CLK_TWSI5, twsi5_clk, twsi5_clk, twsi_parents,
>  		    ARRAY_SIZE(twsi_parents), APBC_TWSI5_CLK_RST,
> -		    4, 3, BIT(1) | BIT(0), 0);
> +		    4, 3, BIT(1), 0);
>  CCU_MUX_GATE_DEFINE(CLK_TWSI6, twsi6_clk, twsi6_clk, twsi_parents,
>  		    ARRAY_SIZE(twsi_parents), APBC_TWSI6_CLK_RST,
> -		    4, 3, BIT(1) | BIT(0), 0);
> +		    4, 3, BIT(1), 0);
>  CCU_MUX_GATE_DEFINE(CLK_TWSI7, twsi7_clk, twsi7_clk, twsi_parents,
>  		    ARRAY_SIZE(twsi_parents), APBC_TWSI7_CLK_RST,
> -		    4, 3, BIT(1) | BIT(0), 0);
> +		    4, 3, BIT(1), 0);
>  
>  static const char * const timer_parents[] = {
>  	"pll1_d192_12p8",
> @@ -1232,8 +1251,12 @@ static struct clk *k1_ccu_mpmu_clks[] = {
>  	&pll1_d4_614p4.common.clk,
>  	&pll1_d6_409p6.common.clk,
>  	&pll1_d8_307p2.common.clk,
> +	&pll1_d24_102p4.common.clk,
> +	&pll1_d48_51p2.common.clk,
> +	&pll1_d96_25p6.common.clk,
>  	&pll1_d78_31p5.common.clk,
>  	&slow_uart2_48.common.clk,
> +	&apb_clk.common.clk,
>  };
>  #else
>  static struct clk *k1_ccu_mpmu_clks[] = {
> @@ -1288,6 +1311,8 @@ static struct clk *k1_ccu_apbc_clks[] = {
>  	&uart0_clk.common.clk,
>  	&twsi2_clk.common.clk,
>  	&twsi8_clk.common.clk,
> +	&twsi2_bus_clk.common.clk,
> +	&twsi8_bus_clk.common.clk,
>  };
>  #else
>  static struct clk *k1_ccu_apbc_clks[] = {
> diff --git a/drivers/i2c/k1_i2c.c b/drivers/i2c/k1_i2c.c
> index 2c7a1e0d3775..b11f73959a08 100644
> --- a/drivers/i2c/k1_i2c.c
> +++ b/drivers/i2c/k1_i2c.c
> @@ -51,7 +51,7 @@ struct k1_i2c {
>  struct k1_i2c_priv {
>  	int id;
>  	void __iomem *base;
> -	struct clk clk;
> +	struct clk_bulk clks;
>  };
>  
>  /*
> @@ -487,15 +487,13 @@ static int k1_i2c_probe(struct udevice *bus)
>  		return ret;
>  	}
>  
> -	ret = clk_get_by_index(bus, 0, &priv->clk);
> +	ret = clk_get_bulk(bus, &priv->clks);
>  	if (ret)
>  		return ret;
>  
> -	ret = clk_enable(&priv->clk);
> -	if (ret && ret != -ENOSYS && ret != -EOPNOTSUPP) {
> -		debug("%s: failed to enable clock\n", __func__);
> +	ret = clk_enable_bulk(&priv->clks);
I'd suggest to not use bulk api, to align with k1 i2c kernel driver,
also to make it easy to set func frequency if needed (a weak reason)

> +	if (ret)
>  		return ret;
> -	}
>  
>  	priv->base = (void *)devfdt_get_addr_ptr(bus);
>  
> 
> -- 
> 2.55.0
> 

-- 
Yixun Lan (dlan)

Re: [PATCH 1/2] i2c: k1: fix wrong bus speed setting

[Heiko Schocher via U-Boot]

Hello Junhui Liu,

On 14.08.26 03:46, Junhui Liu wrote:
> The controller bus mode should be selected according to the requested
> I2C bus speed. However, the driver currently passes the functional clock
> rate to k1_i2c_set_bus_speed(), so the selected mode does not reflect
> the requested bus speed.
> 
> Fix this by reading the clock-frequency property from the Device Tree,
> defaulting to standard speed, and drop the unused clk_rate field.
> 
> Fixes: 271546fb8e54 ("i2c: k1: add I2C driver support")
> Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
> ---
>   drivers/i2c/k1_i2c.c | 9 ++++++---
>   1 file changed, 6 insertions(+), 3 deletions(-)

Reviewed-by: Heiko Schocher <hs@nabladev.com>

bye,
Heiko
-- 
Nabla Software Engineering
HRB 40522 Augsburg
Phone: +49 821 45592596
E-Mail: office@nabladev.com
Geschäftsführer : Stefano Babic