| Message ID | 20171117080236.32504-3-yixun.lan@amlogic.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
On 17/11/2017 09:02, Yixun Lan wrote: > From: Jian Hu <jian.hu@amlogic.com> > > This patch try to add support for I2C controller in Meson-AXG SoC, > Due to the IP changes between I2C controller, we need to introduce > a compatible data to make the divider factor configurable. > > Signed-off-by: Jian Hu <jian.hu@amlogic.com> > Signed-off-by: Yixun Lan <yixun.lan@amlogic.com> > --- > drivers/i2c/busses/i2c-meson.c | 32 ++++++++++++++++++++++++++++---- > 1 file changed, 28 insertions(+), 4 deletions(-) > > diff --git a/drivers/i2c/busses/i2c-meson.c b/drivers/i2c/busses/i2c-meson.c > index 88d15b92ec35..517f2cddeff3 100644 > --- a/drivers/i2c/busses/i2c-meson.c > +++ b/drivers/i2c/busses/i2c-meson.c > @@ -16,6 +16,7 @@ > #include <linux/kernel.h> > #include <linux/module.h> > #include <linux/of.h> > +#include <linux/of_device.h> > #include <linux/platform_device.h> > #include <linux/types.h> > > @@ -57,6 +58,10 @@ enum { > STATE_WRITE, > }; > > +struct meson_i2c_data { > + unsigned char div_factor; > +}; > + > /** > * struct meson_i2c - Meson I2C device private data > * > @@ -93,6 +98,8 @@ struct meson_i2c { > struct completion done; > u32 tokens[2]; > int num_tokens; > + > + struct meson_i2c_data *data; > }; > > static void meson_i2c_set_mask(struct meson_i2c *i2c, int reg, u32 mask, > @@ -128,7 +135,7 @@ static void meson_i2c_set_clk_div(struct meson_i2c *i2c, unsigned int freq) > unsigned long clk_rate = clk_get_rate(i2c->clk); > unsigned int div; > > - div = DIV_ROUND_UP(clk_rate, freq * 4); > + div = DIV_ROUND_UP(clk_rate, freq * i2c->data->div_factor); > > /* clock divider has 12 bits */ > if (div >= (1 << 12)) { > @@ -376,6 +383,9 @@ static int meson_i2c_probe(struct platform_device *pdev) > spin_lock_init(&i2c->lock); > init_completion(&i2c->done); > > + i2c->data = (struct meson_i2c_data *) > + of_device_get_match_data(&pdev->dev); > + > i2c->clk = devm_clk_get(&pdev->dev, NULL); > if (IS_ERR(i2c->clk)) { > dev_err(&pdev->dev, "can't get device clock\n"); > @@ -440,11 +450,25 @@ static int meson_i2c_remove(struct platform_device *pdev) > return 0; > } > > +static const struct meson_i2c_data i2c_meson6_data = { > + .div_factor = 4, > +}; > + > +static const struct meson_i2c_data i2c_gxbb_data = { > + .div_factor = 4, > +}; > + > +static const struct meson_i2c_data i2c_axg_data = { > + .div_factor = 3, > +}; > + > static const struct of_device_id meson_i2c_match[] = { > - { .compatible = "amlogic,meson6-i2c" }, > - { .compatible = "amlogic,meson-gxbb-i2c" }, > - { }, > + { .compatible = "amlogic,meson6-i2c", .data = &i2c_meson6_data }, > + { .compatible = "amlogic,meson-gxbb-i2c", .data = &i2c_gxbb_data }, > + { .compatible = "amlogic,meson-axg-i2c", .data = &i2c_axg_data }, > + {}, > }; > + > MODULE_DEVICE_TABLE(of, meson_i2c_match); > > static struct platform_driver meson_i2c_driver = { > Reviewed-by: Neil Armstrong <narmstrong@baylibre.com>
On Fri, Nov 17, 2017 at 9:02 AM, Yixun Lan <yixun.lan@amlogic.com> wrote: > From: Jian Hu <jian.hu@amlogic.com> > > This patch try to add support for I2C controller in Meson-AXG SoC, > Due to the IP changes between I2C controller, we need to introduce > a compatible data to make the divider factor configurable. > > Signed-off-by: Jian Hu <jian.hu@amlogic.com> > Signed-off-by: Yixun Lan <yixun.lan@amlogic.com> > --- > drivers/i2c/busses/i2c-meson.c | 32 ++++++++++++++++++++++++++++---- > 1 file changed, 28 insertions(+), 4 deletions(-) > > diff --git a/drivers/i2c/busses/i2c-meson.c b/drivers/i2c/busses/i2c-meson.c > index 88d15b92ec35..517f2cddeff3 100644 > --- a/drivers/i2c/busses/i2c-meson.c > +++ b/drivers/i2c/busses/i2c-meson.c > @@ -16,6 +16,7 @@ > #include <linux/kernel.h> > #include <linux/module.h> > #include <linux/of.h> > +#include <linux/of_device.h> > #include <linux/platform_device.h> > #include <linux/types.h> > > @@ -57,6 +58,10 @@ enum { > STATE_WRITE, > }; > > +struct meson_i2c_data { > + unsigned char div_factor; > +}; > + > /** > * struct meson_i2c - Meson I2C device private data > * > @@ -93,6 +98,8 @@ struct meson_i2c { > struct completion done; > u32 tokens[2]; > int num_tokens; > + > + struct meson_i2c_data *data; shouldn't this be const (like the definitions below)? > }; > > static void meson_i2c_set_mask(struct meson_i2c *i2c, int reg, u32 mask, > @@ -128,7 +135,7 @@ static void meson_i2c_set_clk_div(struct meson_i2c *i2c, unsigned int freq) > unsigned long clk_rate = clk_get_rate(i2c->clk); > unsigned int div; > > - div = DIV_ROUND_UP(clk_rate, freq * 4); > + div = DIV_ROUND_UP(clk_rate, freq * i2c->data->div_factor); > > /* clock divider has 12 bits */ > if (div >= (1 << 12)) { > @@ -376,6 +383,9 @@ static int meson_i2c_probe(struct platform_device *pdev) > spin_lock_init(&i2c->lock); > init_completion(&i2c->done); > > + i2c->data = (struct meson_i2c_data *) > + of_device_get_match_data(&pdev->dev); > + > i2c->clk = devm_clk_get(&pdev->dev, NULL); > if (IS_ERR(i2c->clk)) { > dev_err(&pdev->dev, "can't get device clock\n"); > @@ -440,11 +450,25 @@ static int meson_i2c_remove(struct platform_device *pdev) > return 0; > } > > +static const struct meson_i2c_data i2c_meson6_data = { > + .div_factor = 4, > +}; > + > +static const struct meson_i2c_data i2c_gxbb_data = { > + .div_factor = 4, > +}; > + > +static const struct meson_i2c_data i2c_axg_data = { > + .div_factor = 3, > +}; > + > static const struct of_device_id meson_i2c_match[] = { > - { .compatible = "amlogic,meson6-i2c" }, > - { .compatible = "amlogic,meson-gxbb-i2c" }, > - { }, > + { .compatible = "amlogic,meson6-i2c", .data = &i2c_meson6_data }, > + { .compatible = "amlogic,meson-gxbb-i2c", .data = &i2c_gxbb_data }, > + { .compatible = "amlogic,meson-axg-i2c", .data = &i2c_axg_data }, > + {}, > }; > + > MODULE_DEVICE_TABLE(of, meson_i2c_match); > > static struct platform_driver meson_i2c_driver = { > -- > 2.14.1 > > > _______________________________________________ > linux-amlogic mailing list > linux-amlogic@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-amlogic
diff --git a/drivers/i2c/busses/i2c-meson.c b/drivers/i2c/busses/i2c-meson.c index 88d15b92ec35..517f2cddeff3 100644 --- a/drivers/i2c/busses/i2c-meson.c +++ b/drivers/i2c/busses/i2c-meson.c @@ -16,6 +16,7 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/of.h> +#include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/types.h> @@ -57,6 +58,10 @@ enum { STATE_WRITE, }; +struct meson_i2c_data { + unsigned char div_factor; +}; + /** * struct meson_i2c - Meson I2C device private data * @@ -93,6 +98,8 @@ struct meson_i2c { struct completion done; u32 tokens[2]; int num_tokens; + + struct meson_i2c_data *data; }; static void meson_i2c_set_mask(struct meson_i2c *i2c, int reg, u32 mask, @@ -128,7 +135,7 @@ static void meson_i2c_set_clk_div(struct meson_i2c *i2c, unsigned int freq) unsigned long clk_rate = clk_get_rate(i2c->clk); unsigned int div; - div = DIV_ROUND_UP(clk_rate, freq * 4); + div = DIV_ROUND_UP(clk_rate, freq * i2c->data->div_factor); /* clock divider has 12 bits */ if (div >= (1 << 12)) { @@ -376,6 +383,9 @@ static int meson_i2c_probe(struct platform_device *pdev) spin_lock_init(&i2c->lock); init_completion(&i2c->done); + i2c->data = (struct meson_i2c_data *) + of_device_get_match_data(&pdev->dev); + i2c->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(i2c->clk)) { dev_err(&pdev->dev, "can't get device clock\n"); @@ -440,11 +450,25 @@ static int meson_i2c_remove(struct platform_device *pdev) return 0; } +static const struct meson_i2c_data i2c_meson6_data = { + .div_factor = 4, +}; + +static const struct meson_i2c_data i2c_gxbb_data = { + .div_factor = 4, +}; + +static const struct meson_i2c_data i2c_axg_data = { + .div_factor = 3, +}; + static const struct of_device_id meson_i2c_match[] = { - { .compatible = "amlogic,meson6-i2c" }, - { .compatible = "amlogic,meson-gxbb-i2c" }, - { }, + { .compatible = "amlogic,meson6-i2c", .data = &i2c_meson6_data }, + { .compatible = "amlogic,meson-gxbb-i2c", .data = &i2c_gxbb_data }, + { .compatible = "amlogic,meson-axg-i2c", .data = &i2c_axg_data }, + {}, }; + MODULE_DEVICE_TABLE(of, meson_i2c_match); static struct platform_driver meson_i2c_driver = {