* [PATCH] i2c: mediatek: Fix generic definitions for bus frequencies
@ 2020-09-12 5:57 qii.wang
2020-09-13 15:15 ` Yingjoe Chen
2020-09-14 12:48 ` Andy Shevchenko
0 siblings, 2 replies; 5+ messages in thread
From: qii.wang @ 2020-09-12 5:57 UTC (permalink / raw)
To: wsa
Cc: devicetree, qii.wang, srv_heupstream, leilk.liu, linux-kernel,
linux-mediatek, linux-i2c, linux-arm-kernel
From: Qii Wang <qii.wang@mediatek.com>
The master code needs to being sent when the speed is more than
I2C_MAX_FAST_MODE_PLUS_FREQ instead of
I2C_MAX_HIGH_SPEED_MODE_FREQ. Fix it.
Signed-off-by: Qii Wang <qii.wang@mediatek.com>
---
drivers/i2c/busses/i2c-mt65xx.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
index efc1404..0cbdfbe 100644
--- a/drivers/i2c/busses/i2c-mt65xx.c
+++ b/drivers/i2c/busses/i2c-mt65xx.c
@@ -681,8 +681,8 @@ static int mtk_i2c_calculate_speed(struct mtk_i2c *i2c, unsigned int clk_src,
unsigned int cnt_mul;
int ret = -EINVAL;
- if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ)
- target_speed = I2C_MAX_FAST_MODE_PLUS_FREQ;
+ if (target_speed > I2C_MAX_HIGH_SPEED_MODE_FREQ)
+ target_speed = I2C_MAX_HIGH_SPEED_MODE_FREQ;
max_step_cnt = mtk_i2c_max_step_cnt(target_speed);
base_step_cnt = max_step_cnt;
@@ -759,7 +759,7 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
for (clk_div = 1; clk_div <= max_clk_div; clk_div++) {
clk_src = parent_clk / clk_div;
- if (target_speed > I2C_MAX_FAST_MODE_FREQ) {
+ if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ) {
/* Set master code speed register */
ret = mtk_i2c_calculate_speed(i2c, clk_src,
I2C_MAX_FAST_MODE_FREQ,
--
1.9.1
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^ permalink raw reply related [flat|nested] 5+ messages in thread* Re: [PATCH] i2c: mediatek: Fix generic definitions for bus frequencies
2020-09-12 5:57 [PATCH] i2c: mediatek: Fix generic definitions for bus frequencies qii.wang
@ 2020-09-13 15:15 ` Yingjoe Chen
2020-09-14 12:48 ` Andy Shevchenko
1 sibling, 0 replies; 5+ messages in thread
From: Yingjoe Chen @ 2020-09-13 15:15 UTC (permalink / raw)
To: qii.wang
Cc: devicetree, srv_heupstream, wsa, leilk.liu, linux-kernel,
linux-mediatek, linux-i2c, Andy Shevchenko, linux-arm-kernel
On Sat, 2020-09-12 at 13:57 +0800, qii.wang@mediatek.com wrote:
> From: Qii Wang <qii.wang@mediatek.com>
>
> The master code needs to being sent when the speed is more than
> I2C_MAX_FAST_MODE_PLUS_FREQ instead of
> I2C_MAX_HIGH_SPEED_MODE_FREQ. Fix it.
This was introduced by "i2c: drivers: Use generic definitions for bus
frequencies". You should have
Fixes: 90224e6468e1 ("i2c: drivers: Use generic definitions for bus
frequencies")
You can have my reviewed by after you add fixes.
Reviewed-by: Yingjoe Chen <yingjoe.chen@mediatek.com>
Joe.C
>
> Signed-off-by: Qii Wang <qii.wang@mediatek.com>
> ---
> drivers/i2c/busses/i2c-mt65xx.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
> index efc1404..0cbdfbe 100644
> --- a/drivers/i2c/busses/i2c-mt65xx.c
> +++ b/drivers/i2c/busses/i2c-mt65xx.c
> @@ -681,8 +681,8 @@ static int mtk_i2c_calculate_speed(struct mtk_i2c *i2c, unsigned int clk_src,
> unsigned int cnt_mul;
> int ret = -EINVAL;
>
> - if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ)
> - target_speed = I2C_MAX_FAST_MODE_PLUS_FREQ;
> + if (target_speed > I2C_MAX_HIGH_SPEED_MODE_FREQ)
> + target_speed = I2C_MAX_HIGH_SPEED_MODE_FREQ;
>
> max_step_cnt = mtk_i2c_max_step_cnt(target_speed);
> base_step_cnt = max_step_cnt;
> @@ -759,7 +759,7 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
> for (clk_div = 1; clk_div <= max_clk_div; clk_div++) {
> clk_src = parent_clk / clk_div;
>
> - if (target_speed > I2C_MAX_FAST_MODE_FREQ) {
> + if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ) {
> /* Set master code speed register */
> ret = mtk_i2c_calculate_speed(i2c, clk_src,
> I2C_MAX_FAST_MODE_FREQ,
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^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH] i2c: mediatek: Fix generic definitions for bus frequencies
2020-09-12 5:57 [PATCH] i2c: mediatek: Fix generic definitions for bus frequencies qii.wang
2020-09-13 15:15 ` Yingjoe Chen
@ 2020-09-14 12:48 ` Andy Shevchenko
2020-09-15 1:24 ` Qii Wang
2020-09-18 20:45 ` Wolfram Sang
1 sibling, 2 replies; 5+ messages in thread
From: Andy Shevchenko @ 2020-09-14 12:48 UTC (permalink / raw)
To: qii.wang
Cc: devicetree, srv_heupstream, Wolfram Sang, Leilk Liu,
Linux Kernel Mailing List,
moderated list:ARM/Mediatek SoC support, linux-i2c,
linux-arm Mailing List
On Sat, Sep 12, 2020 at 9:02 AM <qii.wang@mediatek.com> wrote:
>
> From: Qii Wang <qii.wang@mediatek.com>
>
> The master code needs to being sent when the speed is more than
> I2C_MAX_FAST_MODE_PLUS_FREQ instead of
> I2C_MAX_HIGH_SPEED_MODE_FREQ. Fix it.
>
> Signed-off-by: Qii Wang <qii.wang@mediatek.com>
> ---
> drivers/i2c/busses/i2c-mt65xx.c | 6 +++---
> 1 file changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
> index efc1404..0cbdfbe 100644
> --- a/drivers/i2c/busses/i2c-mt65xx.c
> +++ b/drivers/i2c/busses/i2c-mt65xx.c
> @@ -681,8 +681,8 @@ static int mtk_i2c_calculate_speed(struct mtk_i2c *i2c, unsigned int clk_src,
> unsigned int cnt_mul;
> int ret = -EINVAL;
>
> - if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ)
> - target_speed = I2C_MAX_FAST_MODE_PLUS_FREQ;
> + if (target_speed > I2C_MAX_HIGH_SPEED_MODE_FREQ)
> + target_speed = I2C_MAX_HIGH_SPEED_MODE_FREQ;
Thanks for fixing this. Indeed, somehow I messed these up.
>
> max_step_cnt = mtk_i2c_max_step_cnt(target_speed);
> base_step_cnt = max_step_cnt;
> @@ -759,7 +759,7 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
> for (clk_div = 1; clk_div <= max_clk_div; clk_div++) {
> clk_src = parent_clk / clk_div;
>
> - if (target_speed > I2C_MAX_FAST_MODE_FREQ) {
> + if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ) {
But this one is not related. Original code used to have
#define MAX_FS_MODE_SPEED 400000
if (target_speed > MAX_FS_MODE_SPEED) {
And this change doesn't fix the above mentioned problem.
So, please split into two separate changes.
> /* Set master code speed register */
> ret = mtk_i2c_calculate_speed(i2c, clk_src,
> I2C_MAX_FAST_MODE_FREQ,
> --
> 1.9.1
--
With Best Regards,
Andy Shevchenko
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH] i2c: mediatek: Fix generic definitions for bus frequencies
2020-09-14 12:48 ` Andy Shevchenko
@ 2020-09-15 1:24 ` Qii Wang
2020-09-18 20:45 ` Wolfram Sang
1 sibling, 0 replies; 5+ messages in thread
From: Qii Wang @ 2020-09-15 1:24 UTC (permalink / raw)
To: Andy Shevchenko
Cc: devicetree, srv_heupstream, Wolfram Sang, Leilk Liu,
Linux Kernel Mailing List,
moderated list:ARM/Mediatek SoC support, linux-i2c,
linux-arm Mailing List
On Mon, 2020-09-14 at 15:48 +0300, Andy Shevchenko wrote:
> On Sat, Sep 12, 2020 at 9:02 AM <qii.wang@mediatek.com> wrote:
> >
> > From: Qii Wang <qii.wang@mediatek.com>
> >
> > The master code needs to being sent when the speed is more than
> > I2C_MAX_FAST_MODE_PLUS_FREQ instead of
> > I2C_MAX_HIGH_SPEED_MODE_FREQ. Fix it.
> >
> > Signed-off-by: Qii Wang <qii.wang@mediatek.com>
> > ---
> > drivers/i2c/busses/i2c-mt65xx.c | 6 +++---
> > 1 file changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/i2c/busses/i2c-mt65xx.c b/drivers/i2c/busses/i2c-mt65xx.c
> > index efc1404..0cbdfbe 100644
> > --- a/drivers/i2c/busses/i2c-mt65xx.c
> > +++ b/drivers/i2c/busses/i2c-mt65xx.c
> > @@ -681,8 +681,8 @@ static int mtk_i2c_calculate_speed(struct mtk_i2c *i2c, unsigned int clk_src,
> > unsigned int cnt_mul;
> > int ret = -EINVAL;
> >
> > - if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ)
> > - target_speed = I2C_MAX_FAST_MODE_PLUS_FREQ;
> > + if (target_speed > I2C_MAX_HIGH_SPEED_MODE_FREQ)
> > + target_speed = I2C_MAX_HIGH_SPEED_MODE_FREQ;
>
> Thanks for fixing this. Indeed, somehow I messed these up.
>
> >
> > max_step_cnt = mtk_i2c_max_step_cnt(target_speed);
> > base_step_cnt = max_step_cnt;
> > @@ -759,7 +759,7 @@ static int mtk_i2c_set_speed(struct mtk_i2c *i2c, unsigned int parent_clk)
> > for (clk_div = 1; clk_div <= max_clk_div; clk_div++) {
> > clk_src = parent_clk / clk_div;
> >
> > - if (target_speed > I2C_MAX_FAST_MODE_FREQ) {
> > + if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ) {
>
> But this one is not related. Original code used to have
>
> #define MAX_FS_MODE_SPEED 400000
>
> if (target_speed > MAX_FS_MODE_SPEED) {
>
> And this change doesn't fix the above mentioned problem.
>
> So, please split into two separate changes.
>
ok, Thank you for your comments
> > /* Set master code speed register */
> > ret = mtk_i2c_calculate_speed(i2c, clk_src,
> > I2C_MAX_FAST_MODE_FREQ,
> > --
> > 1.9.1
>
>
>
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^ permalink raw reply [flat|nested] 5+ messages in thread* Re: [PATCH] i2c: mediatek: Fix generic definitions for bus frequencies
2020-09-14 12:48 ` Andy Shevchenko
2020-09-15 1:24 ` Qii Wang
@ 2020-09-18 20:45 ` Wolfram Sang
1 sibling, 0 replies; 5+ messages in thread
From: Wolfram Sang @ 2020-09-18 20:45 UTC (permalink / raw)
To: Andy Shevchenko
Cc: devicetree, qii.wang, srv_heupstream, Leilk Liu,
Linux Kernel Mailing List,
moderated list:ARM/Mediatek SoC support, linux-i2c,
linux-arm Mailing List
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> > - if (target_speed > I2C_MAX_FAST_MODE_PLUS_FREQ)
> > - target_speed = I2C_MAX_FAST_MODE_PLUS_FREQ;
> > + if (target_speed > I2C_MAX_HIGH_SPEED_MODE_FREQ)
> > + target_speed = I2C_MAX_HIGH_SPEED_MODE_FREQ;
>
> Thanks for fixing this. Indeed, somehow I messed these up.
I read this as Rev-by for v2. Thanks!
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^ permalink raw reply [flat|nested] 5+ messages in thread
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2020-09-12 5:57 [PATCH] i2c: mediatek: Fix generic definitions for bus frequencies qii.wang
2020-09-13 15:15 ` Yingjoe Chen
2020-09-14 12:48 ` Andy Shevchenko
2020-09-15 1:24 ` Qii Wang
2020-09-18 20:45 ` Wolfram Sang
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