| Message ID | 20230817094520.21286-2-Huangzheng.Lai@unisoc.com |
|---|---|
| State | New |
| Headers | show |
| Series | [1/8] i2c: sprd: Add configurations that support 1Mhz and 3.4Mhz frequencies | expand |
Hi Huangzheng, On Thu, Aug 17, 2023 at 05:45:13PM +0800, Huangzheng Lai wrote: > This patch adds I2C controller driver support for 1Mhz and 3.4Mhz > frequency configurations. please avoid the "This patch adds..." form, it can be sometimes misleading... Use always the imperative form. "Add support for 1Mhz and 3.5Mhz frequency configuration" > Signed-off-by: Huangzheng Lai <Huangzheng.Lai@unisoc.com> > --- > drivers/i2c/busses/i2c-sprd.c | 10 ++++++++-- > 1 file changed, 8 insertions(+), 2 deletions(-) > > diff --git a/drivers/i2c/busses/i2c-sprd.c b/drivers/i2c/busses/i2c-sprd.c > index ffc54fbf814d..acc2a4d4eeae 100644 > --- a/drivers/i2c/busses/i2c-sprd.c > +++ b/drivers/i2c/busses/i2c-sprd.c > @@ -347,6 +347,10 @@ static void sprd_i2c_set_clk(struct sprd_i2c *i2c_dev, u32 freq) > writel((6 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD); > else if (freq == I2C_MAX_STANDARD_MODE_FREQ) > writel((4 * apb_clk) / 1000000, i2c_dev->base + ADDR_STA0_DVD); > + else if (freq == I2C_MAX_FAST_MODE_PLUS_FREQ) > + writel((8 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD); > + else if (freq == I2C_MAX_HIGH_SPEED_MODE_FREQ) > + writel((8 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD); if you want you can queue up a patch that makes this train of "else if" in a switch case. > } > > static void sprd_i2c_enable(struct sprd_i2c *i2c_dev) > @@ -519,9 +523,11 @@ static int sprd_i2c_probe(struct platform_device *pdev) > if (!of_property_read_u32(dev->of_node, "clock-frequency", &prop)) > i2c_dev->bus_freq = prop; > > - /* We only support 100k and 400k now, otherwise will return error. */ > + /* We only support 100k\400k\1m\3.4m now, otherwise will return error. */ > if (i2c_dev->bus_freq != I2C_MAX_STANDARD_MODE_FREQ && > - i2c_dev->bus_freq != I2C_MAX_FAST_MODE_FREQ) > + i2c_dev->bus_freq != I2C_MAX_FAST_MODE_FREQ && > + i2c_dev->bus_freq != I2C_MAX_FAST_MODE_PLUS_FREQ && > + i2c_dev->bus_freq != I2C_MAX_HIGH_SPEED_MODE_FREQ) We finally make use of these defines :) Acked-by: Andi Shyti <andi.shyti@kernel.org> Thanks, Andi > return -EINVAL; > > ret = sprd_i2c_clk_init(i2c_dev); > -- > 2.17.1 >
diff --git a/drivers/i2c/busses/i2c-sprd.c b/drivers/i2c/busses/i2c-sprd.c index ffc54fbf814d..acc2a4d4eeae 100644 --- a/drivers/i2c/busses/i2c-sprd.c +++ b/drivers/i2c/busses/i2c-sprd.c @@ -347,6 +347,10 @@ static void sprd_i2c_set_clk(struct sprd_i2c *i2c_dev, u32 freq) writel((6 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD); else if (freq == I2C_MAX_STANDARD_MODE_FREQ) writel((4 * apb_clk) / 1000000, i2c_dev->base + ADDR_STA0_DVD); + else if (freq == I2C_MAX_FAST_MODE_PLUS_FREQ) + writel((8 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD); + else if (freq == I2C_MAX_HIGH_SPEED_MODE_FREQ) + writel((8 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD); } static void sprd_i2c_enable(struct sprd_i2c *i2c_dev) @@ -519,9 +523,11 @@ static int sprd_i2c_probe(struct platform_device *pdev) if (!of_property_read_u32(dev->of_node, "clock-frequency", &prop)) i2c_dev->bus_freq = prop; - /* We only support 100k and 400k now, otherwise will return error. */ + /* We only support 100k\400k\1m\3.4m now, otherwise will return error. */ if (i2c_dev->bus_freq != I2C_MAX_STANDARD_MODE_FREQ && - i2c_dev->bus_freq != I2C_MAX_FAST_MODE_FREQ) + i2c_dev->bus_freq != I2C_MAX_FAST_MODE_FREQ && + i2c_dev->bus_freq != I2C_MAX_FAST_MODE_PLUS_FREQ && + i2c_dev->bus_freq != I2C_MAX_HIGH_SPEED_MODE_FREQ) return -EINVAL; ret = sprd_i2c_clk_init(i2c_dev);
This patch adds I2C controller driver support for 1Mhz and 3.4Mhz frequency configurations. Signed-off-by: Huangzheng Lai <Huangzheng.Lai@unisoc.com> --- drivers/i2c/busses/i2c-sprd.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-)