* Re: [PATCH] i2c: i2c-stm32f7: rework slave_id allocation
[not found] <1571144589-3066-1-git-send-email-alain.volmat@st.com>
@ 2019-10-22 13:41 ` Pierre Yves MORDRET
2019-10-24 18:35 ` Wolfram Sang
1 sibling, 0 replies; 2+ messages in thread
From: Pierre Yves MORDRET @ 2019-10-22 13:41 UTC (permalink / raw)
To: Alain Volmat, wsa, robh+dt
Cc: mark.rutland, mcoquelin.stm32, alexandre.torgue, linux-i2c,
devicetree, linux-stm32, linux-arm-kernel, linux-kernel,
fabrice.gasnier
Hello
Looks good
Reviewed-by: Pierre-Yves MORDRET <pierre-yves.mordret@st.com>
Thx
Regards
On 10/15/19 3:03 PM, Alain Volmat wrote:
> The IP can handle two slave addresses. One address can either be
> 7 bits or 10 bits while the other can only be 7 bits.
> In order to ensure that a 10 bits address can always be allocated
> (assuming there is only one 7 bits address already allocated),
> pick up the 7-bits only address slot in priority when performing a 7-bits
> address allocation.
>
> Fixes: 60d609f3 ("i2c: i2c-stm32f7: Add slave support")
>
> Signed-off-by: Alain Volmat <alain.volmat@st.com>
> ---
> drivers/i2c/busses/i2c-stm32f7.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c
> index d36cf08461f7..cfae01b15243 100644
> --- a/drivers/i2c/busses/i2c-stm32f7.c
> +++ b/drivers/i2c/busses/i2c-stm32f7.c
> @@ -1265,7 +1265,7 @@ static int stm32f7_i2c_get_free_slave_id(struct stm32f7_i2c_dev *i2c_dev,
> * slave[0] supports 7-bit and 10-bit slave address
> * slave[1] supports 7-bit slave address only
> */
> - for (i = 0; i < STM32F7_I2C_MAX_SLAVE; i++) {
> + for (i = STM32F7_I2C_MAX_SLAVE - 1; i >= 0; i--) {
> if (i == 1 && (slave->flags & I2C_CLIENT_PEC))
> continue;
> if (!i2c_dev->slave[i]) {
>
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH] i2c: i2c-stm32f7: rework slave_id allocation
[not found] <1571144589-3066-1-git-send-email-alain.volmat@st.com>
2019-10-22 13:41 ` [PATCH] i2c: i2c-stm32f7: rework slave_id allocation Pierre Yves MORDRET
@ 2019-10-24 18:35 ` Wolfram Sang
1 sibling, 0 replies; 2+ messages in thread
From: Wolfram Sang @ 2019-10-24 18:35 UTC (permalink / raw)
To: Alain Volmat
Cc: robh+dt, mark.rutland, pierre-yves.mordret, mcoquelin.stm32,
alexandre.torgue, linux-i2c, devicetree, linux-stm32,
linux-arm-kernel, linux-kernel, fabrice.gasnier
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On Tue, Oct 15, 2019 at 03:03:09PM +0200, Alain Volmat wrote:
> The IP can handle two slave addresses. One address can either be
> 7 bits or 10 bits while the other can only be 7 bits.
> In order to ensure that a 10 bits address can always be allocated
> (assuming there is only one 7 bits address already allocated),
> pick up the 7-bits only address slot in priority when performing a 7-bits
> address allocation.
>
> Fixes: 60d609f3 ("i2c: i2c-stm32f7: Add slave support")
>
> Signed-off-by: Alain Volmat <alain.volmat@st.com>
Applied to for-next, thanks!
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^ permalink raw reply [flat|nested] 2+ messages in thread