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Subject[PATCH v4 6/9] power: reset: at91-reset: add at91_reset_data
Date
Add struct at91_reset_data to keep per platform related information.
This is a prerequisite for adding reset_controller_dev support.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
---
drivers/power/reset/at91-reset.c | 38 ++++++++++++++++++++++++--------
1 file changed, 29 insertions(+), 9 deletions(-)

diff --git a/drivers/power/reset/at91-reset.c b/drivers/power/reset/at91-reset.c
index e62798750b6b..1b2aca3f490d 100644
--- a/drivers/power/reset/at91-reset.c
+++ b/drivers/power/reset/at91-reset.c
@@ -79,6 +79,16 @@ struct at91_reset {
u32 ramc_lpr;
};

+/**
+ * struct at91_reset_data - AT91 reset data
+ * @reset_args: SoC specific system reset arguments
+ * @n_device_reset: number of device resets
+ */
+struct at91_reset_data {
+ u32 reset_args;
+ u32 n_device_reset;
+};
+
/*
* unless the SDRAM is cleanly shutdown before we hit the
* reset register it can be left driving the data bus and
@@ -173,29 +183,34 @@ static const struct of_device_id at91_ramc_of_match[] = {
{ /* sentinel */ }
};

+static const struct at91_reset_data sam9260 = {
+ .reset_args = AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST,
+};
+
+static const struct at91_reset_data samx7 = {
+ .reset_args = AT91_RSTC_KEY | AT91_RSTC_PROCRST,
+};
+
static const struct of_device_id at91_reset_of_match[] = {
{
.compatible = "atmel,at91sam9260-rstc",
- .data = (void *)(AT91_RSTC_KEY | AT91_RSTC_PERRST |
- AT91_RSTC_PROCRST),
+ .data = &sam9260,
},
{
.compatible = "atmel,at91sam9g45-rstc",
- .data = (void *)(AT91_RSTC_KEY | AT91_RSTC_PERRST |
- AT91_RSTC_PROCRST)
+ .data = &sam9260,
},
{
.compatible = "atmel,sama5d3-rstc",
- .data = (void *)(AT91_RSTC_KEY | AT91_RSTC_PERRST |
- AT91_RSTC_PROCRST)
+ .data = &sam9260,
},
{
.compatible = "atmel,samx7-rstc",
- .data = (void *)(AT91_RSTC_KEY | AT91_RSTC_PROCRST)
+ .data = &samx7,
},
{
.compatible = "microchip,sam9x60-rstc",
- .data = (void *)(AT91_RSTC_KEY | AT91_RSTC_PROCRST)
+ .data = &samx7,
},
{ /* sentinel */ }
};
@@ -204,6 +219,7 @@ MODULE_DEVICE_TABLE(of, at91_reset_of_match);
static int __init at91_reset_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
+ const struct at91_reset_data *data;
struct at91_reset *reset;
struct device_node *np;
int ret, idx = 0;
@@ -233,9 +249,13 @@ static int __init at91_reset_probe(struct platform_device *pdev)
}

match = of_match_node(at91_reset_of_match, pdev->dev.of_node);
+ if (!match || !match->data)
+ return -ENODEV;
+
+ data = match->data;
reset->nb.notifier_call = at91_reset;
reset->nb.priority = 192;
- reset->args = (u32)match->data;
+ reset->args = data->reset_args;

reset->sclk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(reset->sclk))
--
2.33.0
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