Messages in this thread | | | Date | Sat, 2 Sep 2023 22:25:33 +0200 | From | Andi Shyti <> | Subject | Re: [PATCH 1/8] i2c: sprd: Add configurations that support 1Mhz and 3.4Mhz frequencies |
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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 >
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