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mmc: sunxi: Move resources management to separate functions

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We've had all our resources management, and especially the clocks and reset
sequence, done directly as part of the probe.

As we want to implement runtime_pm, we'll obviously want to have that
moved outside of the probe so that we can call do it in our runtime suspend
and resume hooks without too much duplication.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Maxime Ripard 2018-03-08 15:52:51 +01:00 committed by Ulf Hansson
parent e382ab7412
commit 774c010350
1 changed files with 82 additions and 60 deletions
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142
drivers/mmc/host/sunxi-mmc.c
View file

@ -268,6 +268,7 @@ struct sunxi_mmc_cfg {
};
struct sunxi_mmc_host {
struct device *dev;
struct mmc_host *mmc;
struct reset_control *reset;
const struct sunxi_mmc_cfg *cfg;
@ -1165,6 +1166,80 @@ static const struct of_device_id sunxi_mmc_of_match[] = {
};
MODULE_DEVICE_TABLE(of, sunxi_mmc_of_match);
static int sunxi_mmc_enable(struct sunxi_mmc_host *host)
{
int ret;
ret = clk_prepare_enable(host->clk_ahb);
if (ret) {
dev_err(dev, "Couldn't enable the bus clocks (%d)\n", ret);
return ret;
}
ret = clk_prepare_enable(host->clk_mmc);
if (ret) {
dev_err(host->dev, "Enable mmc clk err %d\n", ret);
goto error_disable_clk_ahb;
}
ret = clk_prepare_enable(host->clk_output);
if (ret) {
dev_err(host->dev, "Enable output clk err %d\n", ret);
goto error_disable_clk_mmc;
}
ret = clk_prepare_enable(host->clk_sample);
if (ret) {
dev_err(host->dev, "Enable sample clk err %d\n", ret);
goto error_disable_clk_output;
}
if (!IS_ERR(host->reset)) {
ret = reset_control_reset(host->reset);
if (ret) {
dev_err(dev, "Couldn't reset the MMC controller (%d)\n",
ret);
goto error_disable_clk_sample;
}
}
/*
* Sometimes the controller asserts the irq on boot for some reason,
* make sure the controller is in a sane state before enabling irqs.
*/
ret = sunxi_mmc_reset_host(host);
if (ret)
goto error_assert_reset;
return 0;
error_assert_reset:
if (!IS_ERR(host->reset))
reset_control_assert(host->reset);
error_disable_clk_sample:
clk_disable_unprepare(host->clk_sample);
error_disable_clk_output:
clk_disable_unprepare(host->clk_output);
error_disable_clk_mmc:
clk_disable_unprepare(host->clk_mmc);
error_disable_clk_ahb:
clk_disable_unprepare(host->clk_ahb);
return ret;
}
static void sunxi_mmc_disable(struct sunxi_mmc_host *host)
{
sunxi_mmc_reset_host(host);
if (!IS_ERR(host->reset))
reset_control_assert(host->reset);
clk_disable_unprepare(host->clk_sample);
clk_disable_unprepare(host->clk_output);
clk_disable_unprepare(host->clk_mmc);
clk_disable_unprepare(host->clk_ahb);
}
static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host,
struct platform_device *pdev)
{
@ -1214,66 +1289,21 @@ static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host,
if (PTR_ERR(host->reset) == -EPROBE_DEFER)
return PTR_ERR(host->reset);
ret = clk_prepare_enable(host->clk_ahb);
if (ret) {
dev_err(&pdev->dev, "Enable ahb clk err %d\n", ret);
return ret;
}
ret = clk_prepare_enable(host->clk_mmc);
if (ret) {
dev_err(&pdev->dev, "Enable mmc clk err %d\n", ret);
goto error_disable_clk_ahb;
}
ret = clk_prepare_enable(host->clk_output);
if (ret) {
dev_err(&pdev->dev, "Enable output clk err %d\n", ret);
goto error_disable_clk_mmc;
}
ret = clk_prepare_enable(host->clk_sample);
if (ret) {
dev_err(&pdev->dev, "Enable sample clk err %d\n", ret);
goto error_disable_clk_output;
}
if (!IS_ERR(host->reset)) {
ret = reset_control_reset(host->reset);
if (ret) {
dev_err(&pdev->dev, "reset err %d\n", ret);
goto error_disable_clk_sample;
}
}
/*
* Sometimes the controller asserts the irq on boot for some reason,
* make sure the controller is in a sane state before enabling irqs.
*/
ret = sunxi_mmc_reset_host(host);
ret = sunxi_mmc_enable(host);
if (ret)
goto error_assert_reset;
return ret;
host->irq = platform_get_irq(pdev, 0);
if (host->irq <= 0) {
ret = -EINVAL;
goto error_assert_reset;
goto error_disable_mmc;
}
return devm_request_threaded_irq(&pdev->dev, host->irq, sunxi_mmc_irq,
sunxi_mmc_handle_manual_stop, 0, "sunxi-mmc", host);
error_assert_reset:
if (!IS_ERR(host->reset))
reset_control_assert(host->reset);
error_disable_clk_sample:
clk_disable_unprepare(host->clk_sample);
error_disable_clk_output:
clk_disable_unprepare(host->clk_output);
error_disable_clk_mmc:
clk_disable_unprepare(host->clk_mmc);
error_disable_clk_ahb:
clk_disable_unprepare(host->clk_ahb);
error_disable_mmc:
sunxi_mmc_disable(host);
return ret;
}
@ -1290,6 +1320,7 @@ static int sunxi_mmc_probe(struct platform_device *pdev)
}
host = mmc_priv(mmc);
host->dev = &pdev->dev;
host->mmc = mmc;
spin_lock_init(&host->lock);
@ -1370,16 +1401,7 @@ static int sunxi_mmc_remove(struct platform_device *pdev)
mmc_remove_host(mmc);
disable_irq(host->irq);
sunxi_mmc_reset_host(host);
if (!IS_ERR(host->reset))
reset_control_assert(host->reset);
clk_disable_unprepare(host->clk_sample);
clk_disable_unprepare(host->clk_output);
clk_disable_unprepare(host->clk_mmc);
clk_disable_unprepare(host->clk_ahb);
sunxi_mmc_disable(host);
dma_free_coherent(&pdev->dev, PAGE_SIZE, host->sg_cpu, host->sg_dma);
mmc_free_host(mmc);