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memory: omap-gpmc: Add support for GPMC on AM64 SoC

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The TI's AM64 SoC has the GPMC module. Add compatible for it.

Traditionally GPMC external addresses have always been mapped to first
1GB physical address. However newer platforms, can have it mapped
at different locations. Support this address provision via device tree.

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Link: https://lore.kernel.org/r/20211221131757.2030-3-rogerq@kernel.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
This commit is contained in:
Roger Quadros 2021-12-21 15:17:55 +02:00 committed by Krzysztof Kozlowski
parent 4892242784
commit 7e58accf45
1 changed files with 30 additions and 10 deletions
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40
drivers/memory/omap-gpmc.c
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@ -237,6 +237,7 @@ struct gpmc_device {
struct omap3_gpmc_regs context;
int nirqs;
unsigned int is_suspended:1;
struct resource *data;
};
static struct irq_domain *gpmc_irq_domain;
@ -1456,12 +1457,18 @@ static void gpmc_mem_exit(void)
}
}
static void gpmc_mem_init(void)
static void gpmc_mem_init(struct gpmc_device *gpmc)
{
int cs;
gpmc_mem_root.start = GPMC_MEM_START;
gpmc_mem_root.end = GPMC_MEM_END;
if (!gpmc->data) {
/* All legacy devices have same data IO window */
gpmc_mem_root.start = GPMC_MEM_START;
gpmc_mem_root.end = GPMC_MEM_END;
} else {
gpmc_mem_root.start = gpmc->data->start;
gpmc_mem_root.end = gpmc->data->end;
}
/* Reserve all regions that has been set up by bootloader */
for (cs = 0; cs < gpmc_cs_num; cs++) {
@ -1888,6 +1895,7 @@ static const struct of_device_id gpmc_dt_ids[] = {
{ .compatible = "ti,omap3430-gpmc" }, /* omap3430 & omap3630 */
{ .compatible = "ti,omap4430-gpmc" }, /* omap4430 & omap4460 & omap543x */
{ .compatible = "ti,am3352-gpmc" }, /* am335x devices */
{ .compatible = "ti,am64-gpmc" },
{ }
};
@ -2502,13 +2510,25 @@ static int gpmc_probe(struct platform_device *pdev)
gpmc->dev = &pdev->dev;
platform_set_drvdata(pdev, gpmc);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
return -ENOENT;
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cfg");
if (!res) {
/* legacy DT */
gpmc_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(gpmc_base))
return PTR_ERR(gpmc_base);
} else {
gpmc_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(gpmc_base))
return PTR_ERR(gpmc_base);
gpmc_base = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(gpmc_base))
return PTR_ERR(gpmc_base);
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "data");
if (!res) {
dev_err(&pdev->dev, "couldn't get data reg resource\n");
return -ENOENT;
}
gpmc->data = res;
}
gpmc->irq = platform_get_irq(pdev, 0);
if (gpmc->irq < 0)
@ -2558,7 +2578,7 @@ static int gpmc_probe(struct platform_device *pdev)
dev_info(gpmc->dev, "GPMC revision %d.%d\n", GPMC_REVISION_MAJOR(l),
GPMC_REVISION_MINOR(l));
gpmc_mem_init();
gpmc_mem_init(gpmc);
rc = gpmc_gpio_init(gpmc);
if (rc)
goto gpio_init_failed;