From f2bf0e72d000e76c4a9904cc8230cb2e659a2db4 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Fri, 11 Oct 2013 09:21:26 -0700 Subject: [PATCH] ARM: OMAP2+: Add minimal 8250 support for GPMC Just initialize things using the bootloader timings like we've been doing for the legacy booting too. It should be possible to patch in the GPMC timings for the based on the TL16CP743C/TL16C754C manual at: http://www.ti.com/lit/ds/slls644g/slls644g.pdf Signed-off-by: Tony Lindgren --- arch/arm/mach-omap2/gpmc.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/arch/arm/mach-omap2/gpmc.c b/arch/arm/mach-omap2/gpmc.c index 579697adaae7..51525faa0aec 100644 --- a/arch/arm/mach-omap2/gpmc.c +++ b/arch/arm/mach-omap2/gpmc.c @@ -1521,6 +1521,42 @@ err: return ret; } +/* + * REVISIT: Add timing support from slls644g.pdf + */ +static int gpmc_probe_8250(struct platform_device *pdev, + struct device_node *child) +{ + struct resource res; + unsigned long base; + int ret, cs; + + if (of_property_read_u32(child, "reg", &cs) < 0) { + dev_err(&pdev->dev, "%s has no 'reg' property\n", + child->full_name); + return -ENODEV; + } + + if (of_address_to_resource(child, 0, &res) < 0) { + dev_err(&pdev->dev, "%s has malformed 'reg' property\n", + child->full_name); + return -ENODEV; + } + + ret = gpmc_cs_request(cs, resource_size(&res), &base); + if (ret < 0) { + dev_err(&pdev->dev, "cannot request GPMC CS %d\n", cs); + return ret; + } + + if (of_platform_device_create(child, NULL, &pdev->dev)) + return 0; + + dev_err(&pdev->dev, "failed to create gpmc child %s\n", child->name); + + return -ENODEV; +} + static int gpmc_probe_dt(struct platform_device *pdev) { int ret; @@ -1564,6 +1600,8 @@ static int gpmc_probe_dt(struct platform_device *pdev) else if (of_node_cmp(child->name, "ethernet") == 0 || of_node_cmp(child->name, "nor") == 0) ret = gpmc_probe_generic_child(pdev, child); + else if (of_node_cmp(child->name, "8250") == 0) + ret = gpmc_probe_8250(pdev, child); if (WARN(ret < 0, "%s: probing gpmc child %s failed\n", __func__, child->full_name)) -- 2.11.0