From 997f005737aeb5a1e96b9e8e00e77297e3c6fb8a Mon Sep 17 00:00:00 2001 From: Hung-Te Lin Date: Thu, 20 Mar 2014 12:04:33 +0800 Subject: [PATCH] pnp: Allow searching PNP device by port and device ID. To access superio in ramstage, we need to find the device by PNP path. Original-Change-Id: Iea4451381545f7c401e212ac7d7567a32aa92b25 Original-Reviewed-on: https://chromium-review.googlesource.com/190841 BRANCH=zako BUG=chrome-os-partner:25024 TEST=emerge-zako chromeos-coreboot-zako Change-Id: I6118177e5d62b32596caeb119800e8716c998a90 Signed-off-by: Hung-Te Lin Reviewed-on: https://chromium-review.googlesource.com/190972 Reviewed-by: Stefan Reinauer --- src/device/device_util.c | 23 +++++++++++++++++++++++ src/include/device/device.h | 1 + 2 files changed, 24 insertions(+) diff --git a/src/device/device_util.c b/src/device/device_util.c index 9b3e21f9d2..efefa88ed1 100644 --- a/src/device/device_util.c +++ b/src/device/device_util.c @@ -113,6 +113,29 @@ device_t dev_find_lapic(unsigned apic_id) return result; } +/** + * Find a PNP device of given port and device ID. + * + * @param port A PNP port ID. + * @param device A PNP device ID. + * @return Pointer to the device struct. + */ +struct device *dev_find_pnp(unsigned int port, unsigned int device) +{ + struct device *dev, *result; + + result = NULL; + for (dev = all_devices; dev; dev = dev->next) { + if ((dev->path.type == DEVICE_PATH_PNP) && + (dev->path.pnp.port == port) && + (dev->path.pnp.device == device)) { + result = dev; + break; + } + } + return result; +} + /** * Find a device of a given vendor and type. * diff --git a/src/include/device/device.h b/src/include/device/device.h index b0168fc3a4..3d74ecf56b 100644 --- a/src/include/device/device.h +++ b/src/include/device/device.h @@ -159,6 +159,7 @@ device_t dev_find_class (unsigned int class, device_t from); device_t dev_find_slot (unsigned int bus, unsigned int devfn); device_t dev_find_slot_on_smbus (unsigned int bus, unsigned int addr); device_t dev_find_lapic(unsigned apic_id); +device_t dev_find_pnp(unsigned int port, unsigned int device); int dev_count_cpu(void); void remap_bsp_lapic(struct bus *cpu_bus);