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memory: renesas-rpc-if: Add suspend/resume support

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On RZ/G3E using PSCI, s2ram powers down the SoC. Add suspend/resume
callbacks to control spi/spix2 clocks.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://patch.msgid.link/20251019180940.157088-1-biju.das.jz@bp.renesas.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
This commit is contained in:
Biju Das
2025-10-19 19:09:38 +01:00
committed by Krzysztof Kozlowski
parent 50c833c5cd
commit 42ec0bc61f
1 changed files with 44 additions and 12 deletions
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56
drivers/memory/renesas-rpc-if.c
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@@ -67,6 +67,8 @@ struct rpcif_priv {
void __iomem *dirmap;
struct regmap *regmap;
struct reset_control *rstc;
struct clk *spi_clk;
struct clk *spix2_clk;
struct platform_device *vdev;
size_t size;
const struct rpcif_info *info;
@@ -1024,19 +1026,15 @@ static int rpcif_probe(struct platform_device *pdev)
* flash write failure. So, enable these clocks during probe() and
* disable it in remove().
*/
if (rpc->info->type == XSPI_RZ_G3E) {
struct clk *spi_clk;
rpc->spix2_clk = devm_clk_get_optional_enabled(dev, "spix2");
if (IS_ERR(rpc->spix2_clk))
return dev_err_probe(dev, PTR_ERR(rpc->spix2_clk),
"cannot get enabled spix2 clk\n");
spi_clk = devm_clk_get_enabled(dev, "spix2");
if (IS_ERR(spi_clk))
return dev_err_probe(dev, PTR_ERR(spi_clk),
"cannot get enabled spix2 clk\n");
spi_clk = devm_clk_get_enabled(dev, "spi");
if (IS_ERR(spi_clk))
return dev_err_probe(dev, PTR_ERR(spi_clk),
"cannot get enabled spi clk\n");
}
rpc->spi_clk = devm_clk_get_optional_enabled(dev, "spi");
if (IS_ERR(rpc->spi_clk))
return dev_err_probe(dev, PTR_ERR(rpc->spi_clk),
"cannot get enabled spi clk\n");
vdev = platform_device_alloc(name, pdev->id);
if (!vdev)
@@ -1063,6 +1061,37 @@ static void rpcif_remove(struct platform_device *pdev)
platform_device_unregister(rpc->vdev);
}
static int rpcif_suspend(struct device *dev)
{
struct rpcif_priv *rpc = dev_get_drvdata(dev);
clk_disable_unprepare(rpc->spi_clk);
clk_disable_unprepare(rpc->spix2_clk);
return 0;
}
static int rpcif_resume(struct device *dev)
{
struct rpcif_priv *rpc = dev_get_drvdata(dev);
int ret;
ret = clk_prepare_enable(rpc->spix2_clk);
if (ret) {
dev_err(dev, "failed to enable spix2 clock: %pe\n", ERR_PTR(ret));
return ret;
}
ret = clk_prepare_enable(rpc->spi_clk);
if (ret) {
clk_disable_unprepare(rpc->spix2_clk);
dev_err(dev, "failed to enable spi clock: %pe\n", ERR_PTR(ret));
return ret;
}
return 0;
}
static const struct rpcif_impl rpcif_impl = {
.hw_init = rpcif_hw_init_impl,
.prepare = rpcif_prepare_impl,
@@ -1125,12 +1154,15 @@ static const struct of_device_id rpcif_of_match[] = {
};
MODULE_DEVICE_TABLE(of, rpcif_of_match);
static DEFINE_SIMPLE_DEV_PM_OPS(rpcif_pm_ops, rpcif_suspend, rpcif_resume);
static struct platform_driver rpcif_driver = {
.probe = rpcif_probe,
.remove = rpcif_remove,
.driver = {
.name = "rpc-if",
.of_match_table = rpcif_of_match,
.pm = pm_sleep_ptr(&rpcif_pm_ops),
},
};
module_platform_driver(rpcif_driver);