Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1180666 > unrolled thread
| Started by | Maxime Ripard <maxime.ripard@free-electrons.com> |
|---|---|
| First post | 2015-07-09 14:10 +0200 |
| Last post | 2015-07-10 05:10 +0200 |
| Articles | 3 — 3 participants |
Back to article view | Back to linux.kernel
This discussion starts older than the indexed window; earlier articles aren't shown. The article labeled Started by
below is the oldest one visible, not the original post.
Re: [PATCH 1/2] power: reset: at91: add sama5d3 reset function Maxime Ripard <maxime.ripard@free-electrons.com> - 2015-07-09 14:10 +0200
Re: [PATCH 1/2] power: reset: at91: add sama5d3 reset function Nicolas Ferre <nicolas.ferre@atmel.com> - 2015-07-09 14:50 +0200
Re: [PATCH 1/2] power: reset: at91: add sama5d3 reset function Josh Wu <josh.wu@atmel.com> - 2015-07-10 05:10 +0200
| From | Maxime Ripard <maxime.ripard@free-electrons.com> |
|---|---|
| Date | 2015-07-09 14:10 +0200 |
| Subject | Re: [PATCH 1/2] power: reset: at91: add sama5d3 reset function |
| Message-ID | <pKiOn-8rE-49@gated-at.bofh.it> |
[Multipart message — attachments visible in raw view] — view raw
Hi,
On Thu, Jul 09, 2015 at 06:15:46PM +0800, Josh Wu wrote:
> As since sama5d3, to reset the chip, we don't need to shutdown the ddr
> controller.
>
> So add a new compatible string and new restart function for sama5d3 and
> later chips. As we don't use sama5d3 ddr controller, so remove it as
> well.
>
> Signed-off-by: Josh Wu <josh.wu@atmel.com>
> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
> ---
>
> drivers/power/reset/at91-reset.c | 30 +++++++++++++++++++++---------
> 1 file changed, 21 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/power/reset/at91-reset.c b/drivers/power/reset/at91-reset.c
> index 36dc52f..8944b63 100644
> --- a/drivers/power/reset/at91-reset.c
> +++ b/drivers/power/reset/at91-reset.c
> @@ -123,6 +123,14 @@ static int at91sam9g45_restart(struct notifier_block *this, unsigned long mode,
> return NOTIFY_DONE;
> }
>
> +static int sama5d3_restart(struct notifier_block *this, unsigned long mode,
> + void *cmd)
> +{
> + writel(cpu_to_le32(AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST),
> + at91_rstc_base);
> + return NOTIFY_DONE;
> +}
> +
> static void __init at91_reset_status(struct platform_device *pdev)
> {
> u32 reg = readl(at91_rstc_base + AT91_RSTC_SR);
> @@ -155,13 +163,13 @@ static void __init at91_reset_status(struct platform_device *pdev)
> static const struct of_device_id at91_ramc_of_match[] = {
> { .compatible = "atmel,at91sam9260-sdramc", },
> { .compatible = "atmel,at91sam9g45-ddramc", },
> - { .compatible = "atmel,sama5d3-ddramc", },
> { /* sentinel */ }
> };
>
> static const struct of_device_id at91_reset_of_match[] = {
> { .compatible = "atmel,at91sam9260-rstc", .data = at91sam9260_restart },
> { .compatible = "atmel,at91sam9g45-rstc", .data = at91sam9g45_restart },
> + { .compatible = "atmel,sama5d3-rstc", .data = sama5d3_restart },
> { /* sentinel */ }
> };
>
> @@ -181,17 +189,21 @@ static int at91_reset_of_probe(struct platform_device *pdev)
> return -ENODEV;
> }
>
> - for_each_matching_node(np, at91_ramc_of_match) {
> - at91_ramc_base[idx] = of_iomap(np, 0);
> - if (!at91_ramc_base[idx]) {
> - dev_err(&pdev->dev, "Could not map ram controller address\n");
> - return -ENODEV;
> + match = of_match_node(at91_reset_of_match, pdev->dev.of_node);
> + at91_restart_nb.notifier_call = match->data;
> +
> + if (match->data != sama5d3_restart) {
Using of_device_is_compatible seems more appropriate.
Also, why are you changing the order of this loop and the notifier
registration?
Maxime
--
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
[toc] | [next] | [standalone]
| From | Nicolas Ferre <nicolas.ferre@atmel.com> |
|---|---|
| Date | 2015-07-09 14:50 +0200 |
| Message-ID | <pKjr5-dD-57@gated-at.bofh.it> |
| In reply to | #1180666 |
Le 09/07/2015 14:03, Maxime Ripard a écrit :
> Hi,
>
> On Thu, Jul 09, 2015 at 06:15:46PM +0800, Josh Wu wrote:
>> As since sama5d3, to reset the chip, we don't need to shutdown the ddr
>> controller.
>>
>> So add a new compatible string and new restart function for sama5d3 and
>> later chips. As we don't use sama5d3 ddr controller, so remove it as
>> well.
>>
>> Signed-off-by: Josh Wu <josh.wu@atmel.com>
>> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
>> ---
>>
>> drivers/power/reset/at91-reset.c | 30 +++++++++++++++++++++---------
>> 1 file changed, 21 insertions(+), 9 deletions(-)
>>
>> diff --git a/drivers/power/reset/at91-reset.c b/drivers/power/reset/at91-reset.c
>> index 36dc52f..8944b63 100644
>> --- a/drivers/power/reset/at91-reset.c
>> +++ b/drivers/power/reset/at91-reset.c
>> @@ -123,6 +123,14 @@ static int at91sam9g45_restart(struct notifier_block *this, unsigned long mode,
>> return NOTIFY_DONE;
>> }
>>
>> +static int sama5d3_restart(struct notifier_block *this, unsigned long mode,
>> + void *cmd)
>> +{
>> + writel(cpu_to_le32(AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST),
>> + at91_rstc_base);
>> + return NOTIFY_DONE;
>> +}
>> +
>> static void __init at91_reset_status(struct platform_device *pdev)
>> {
>> u32 reg = readl(at91_rstc_base + AT91_RSTC_SR);
>> @@ -155,13 +163,13 @@ static void __init at91_reset_status(struct platform_device *pdev)
>> static const struct of_device_id at91_ramc_of_match[] = {
>> { .compatible = "atmel,at91sam9260-sdramc", },
>> { .compatible = "atmel,at91sam9g45-ddramc", },
>> - { .compatible = "atmel,sama5d3-ddramc", },
>> { /* sentinel */ }
>> };
>>
>> static const struct of_device_id at91_reset_of_match[] = {
>> { .compatible = "atmel,at91sam9260-rstc", .data = at91sam9260_restart },
>> { .compatible = "atmel,at91sam9g45-rstc", .data = at91sam9g45_restart },
>> + { .compatible = "atmel,sama5d3-rstc", .data = sama5d3_restart },
>> { /* sentinel */ }
>> };
>>
>> @@ -181,17 +189,21 @@ static int at91_reset_of_probe(struct platform_device *pdev)
>> return -ENODEV;
>> }
>>
>> - for_each_matching_node(np, at91_ramc_of_match) {
>> - at91_ramc_base[idx] = of_iomap(np, 0);
>> - if (!at91_ramc_base[idx]) {
>> - dev_err(&pdev->dev, "Could not map ram controller address\n");
>> - return -ENODEV;
>> + match = of_match_node(at91_reset_of_match, pdev->dev.of_node);
>> + at91_restart_nb.notifier_call = match->data;
>> +
>> + if (match->data != sama5d3_restart) {
>
> Using of_device_is_compatible seems more appropriate.
>
> Also, why are you changing the order of this loop and the notifier
> registration?
Well, it's because the sama5d3 onwards controllers don't need ramc
controller.
So, reverting the order seems needed. Doesn't it address your question,
or did I lost track?
Bye,
--
Nicolas Ferre
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [next] | [standalone]
| From | Josh Wu <josh.wu@atmel.com> |
|---|---|
| Date | 2015-07-10 05:10 +0200 |
| Message-ID | <pKwRk-qv-3@gated-at.bofh.it> |
| In reply to | #1180666 |
Hi, Maxime
On 7/9/2015 8:03 PM, Maxime Ripard wrote:
> Hi,
>
> On Thu, Jul 09, 2015 at 06:15:46PM +0800, Josh Wu wrote:
>> As since sama5d3, to reset the chip, we don't need to shutdown the ddr
>> controller.
>>
>> So add a new compatible string and new restart function for sama5d3 and
>> later chips. As we don't use sama5d3 ddr controller, so remove it as
>> well.
>>
>> Signed-off-by: Josh Wu <josh.wu@atmel.com>
>> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
>> ---
>>
>> drivers/power/reset/at91-reset.c | 30 +++++++++++++++++++++---------
>> 1 file changed, 21 insertions(+), 9 deletions(-)
>>
>> diff --git a/drivers/power/reset/at91-reset.c b/drivers/power/reset/at91-reset.c
>> index 36dc52f..8944b63 100644
>> --- a/drivers/power/reset/at91-reset.c
>> +++ b/drivers/power/reset/at91-reset.c
>> @@ -123,6 +123,14 @@ static int at91sam9g45_restart(struct notifier_block *this, unsigned long mode,
>> return NOTIFY_DONE;
>> }
>>
>> +static int sama5d3_restart(struct notifier_block *this, unsigned long mode,
>> + void *cmd)
>> +{
>> + writel(cpu_to_le32(AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST),
>> + at91_rstc_base);
>> + return NOTIFY_DONE;
>> +}
>> +
>> static void __init at91_reset_status(struct platform_device *pdev)
>> {
>> u32 reg = readl(at91_rstc_base + AT91_RSTC_SR);
>> @@ -155,13 +163,13 @@ static void __init at91_reset_status(struct platform_device *pdev)
>> static const struct of_device_id at91_ramc_of_match[] = {
>> { .compatible = "atmel,at91sam9260-sdramc", },
>> { .compatible = "atmel,at91sam9g45-ddramc", },
>> - { .compatible = "atmel,sama5d3-ddramc", },
>> { /* sentinel */ }
>> };
>>
>> static const struct of_device_id at91_reset_of_match[] = {
>> { .compatible = "atmel,at91sam9260-rstc", .data = at91sam9260_restart },
>> { .compatible = "atmel,at91sam9g45-rstc", .data = at91sam9g45_restart },
>> + { .compatible = "atmel,sama5d3-rstc", .data = sama5d3_restart },
>> { /* sentinel */ }
>> };
>>
>> @@ -181,17 +189,21 @@ static int at91_reset_of_probe(struct platform_device *pdev)
>> return -ENODEV;
>> }
>>
>> - for_each_matching_node(np, at91_ramc_of_match) {
>> - at91_ramc_base[idx] = of_iomap(np, 0);
>> - if (!at91_ramc_base[idx]) {
>> - dev_err(&pdev->dev, "Could not map ram controller address\n");
>> - return -ENODEV;
>> + match = of_match_node(at91_reset_of_match, pdev->dev.of_node);
>> + at91_restart_nb.notifier_call = match->data;
>> +
>> + if (match->data != sama5d3_restart) {
> Using of_device_is_compatible seems more appropriate.
>
> Also, why are you changing the order of this loop and the notifier
> registration?
I moved this order because I use the match->data to compare whether is
sama5d3_restart. So I need to move this function (of_match_node) up.
Best Regards,
Josh Wu
>
> Maxime
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[toc] | [prev] | [standalone]
Back to top | Article view | linux.kernel
csiph-web