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power: reset: at91-reset: add at91_reset_data

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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>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Claudiu Beznea 2022-06-10 12:24:11 +03:00 committed by Sebastian Reichel
parent cd4ed0ab80
commit e17ad25bc3
1 changed files with 34 additions and 11 deletions
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45
drivers/power/reset/at91-reset.c
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@ -66,6 +66,7 @@ enum reset_type {
* @rstc_base: base address for system reset
* @ramc_base: array with base addresses of RAM controllers
* @sclk: slow clock
* @data: platform specific reset data
* @nb: reset notifier block
* @args: SoC specific system reset arguments
* @ramc_lpr: SDRAM Controller Low Power Register
@ -74,11 +75,26 @@ struct at91_reset {
void __iomem *rstc_base;
void __iomem *ramc_base[2];
struct clk *sclk;
const struct at91_reset_data *data;
struct notifier_block nb;
u32 args;
u32 ramc_lpr;
};
/**
* struct at91_reset_data - AT91 reset data
* @reset_args: SoC specific system reset arguments
* @n_device_reset: number of device resets
* @device_reset_min_id: min id for device reset
* @device_reset_max_id: max id for device reset
*/
struct at91_reset_data {
u32 reset_args;
u32 n_device_reset;
u8 device_reset_min_id;
u8 device_reset_max_id;
};
/*
* unless the SDRAM is cleanly shutdown before we hit the
* reset register it can be left driving the data bus and
@ -115,7 +131,7 @@ static int at91_reset(struct notifier_block *this, unsigned long mode,
"r" (reset->rstc_base),
"r" (1),
"r" cpu_to_le32(AT91_DDRSDRC_LPCB_POWER_DOWN),
"r" (reset->args),
"r" (reset->data->reset_args),
"r" (reset->ramc_lpr)
: "r4");
@ -173,29 +189,34 @@ 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 */ }
};
@ -232,10 +253,12 @@ static int __init at91_reset_probe(struct platform_device *pdev)
}
}
match = of_match_node(at91_reset_of_match, pdev->dev.of_node);
reset->data = device_get_match_data(&pdev->dev);
if (!reset->data)
return -ENODEV;
reset->nb.notifier_call = at91_reset;
reset->nb.priority = 192;
reset->args = (u32)match->data;
reset->sclk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(reset->sclk))