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Drivers are not allowed to use static data since they may be used in SPL where BSS is not available. It is possible that driver model may provide support for numbering devices in the future. But for now, move this to global_data. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2009
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* Vipin Kumar, ST Micoelectronics, vipin.kumar@st.com.
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* Copyright 2019 Google Inc
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*/
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#include <common.h>
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#include <dm.h>
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#include "designware_i2c.h"
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/* BayTrail HCNT/LCNT/SDA hold time */
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static struct dw_scl_sda_cfg byt_config = {
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.ss_hcnt = 0x200,
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.fs_hcnt = 0x55,
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.ss_lcnt = 0x200,
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.fs_lcnt = 0x99,
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.sda_hold = 0x6,
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};
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static int designware_i2c_pci_probe(struct udevice *dev)
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{
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struct dw_i2c *priv = dev_get_priv(dev);
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/* Save base address from PCI BAR */
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priv->regs = (struct i2c_regs *)
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dm_pci_map_bar(dev, PCI_BASE_ADDRESS_0, PCI_REGION_MEM);
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if (IS_ENABLED(CONFIG_INTEL_BAYTRAIL))
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/* Use BayTrail specific timing values */
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priv->scl_sda_cfg = &byt_config;
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return designware_i2c_probe(dev);
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}
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static int designware_i2c_pci_bind(struct udevice *dev)
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{
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char name[20];
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/*
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* Create a unique device name for PCI type devices
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* ToDo:
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* Setting req_seq in the driver is probably not recommended.
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* But without a DT alias the number is not configured. And
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* using this driver is impossible for PCIe I2C devices.
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* This can be removed, once a better (correct) way for this
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* is found and implemented.
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*
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* TODO(sjg@chromium.org): Perhaps if uclasses had platdata this would
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* be possible. We cannot use static data in drivers since they may be
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* used in SPL or before relocation.
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*/
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dev->req_seq = gd->arch.dw_i2c_num_cards++;
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sprintf(name, "i2c_designware#%u", dev->req_seq);
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device_set_name(dev, name);
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return 0;
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}
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U_BOOT_DRIVER(i2c_designware_pci) = {
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.name = "i2c_designware_pci",
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.id = UCLASS_I2C,
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.bind = designware_i2c_pci_bind,
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.probe = designware_i2c_pci_probe,
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.priv_auto_alloc_size = sizeof(struct dw_i2c),
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.remove = designware_i2c_remove,
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.flags = DM_FLAG_OS_PREPARE,
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.ops = &designware_i2c_ops,
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};
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static struct pci_device_id designware_pci_supported[] = {
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/* Intel BayTrail has 7 I2C controller located on the PCI bus */
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{ PCI_VDEVICE(INTEL, 0x0f41) },
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{ PCI_VDEVICE(INTEL, 0x0f42) },
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{ PCI_VDEVICE(INTEL, 0x0f43) },
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{ PCI_VDEVICE(INTEL, 0x0f44) },
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{ PCI_VDEVICE(INTEL, 0x0f45) },
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{ PCI_VDEVICE(INTEL, 0x0f46) },
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{ PCI_VDEVICE(INTEL, 0x0f47) },
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{},
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};
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U_BOOT_PCI_DEVICE(i2c_designware_pci, designware_pci_supported);
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