[PATCH v6 2/3] PCI: visconti: Add Toshiba Visconti PCIe host controller driver

[Rob Herring]

On Wed, Aug 11, 2021 at 3:38 AM Nobuhiro Iwamatsu
<nobuhiro1.iwamatsu at toshiba.co.jp> wrote:
>
> Add support to PCIe RC controller on Toshiba Visconti ARM SoCs. PCIe
> controller is based of Synopsys DesignWare PCIe core.
>
> Signed-off-by: Yuji Ishikawa <yuji2.ishikawa at toshiba.co.jp>
> Signed-off-by: Nobuhiro Iwamatsu <nobuhiro1.iwamatsu at toshiba.co.jp>
>
> v5 -> v6:
>   - Remove unnecessary commit log.
>   - Fix split line of visconti_add_pcie_port()
>
> v4 -> v5:
>   - Remove PCIE_BUS_OFFSET
>   - Change link_up confirmation function of visconti_pcie_link_up().
>   - Move setting event mask before dw_pcie_link_up().
>   - Move the contents of visconti_pcie_power_on() to visconti_pcie_host_init().
>   - Remove code for link_gen.
>
> v3 -> v4:
>   - Change variable from pci_addr to cpu_addr in visconti_pcie_cpu_addr_fixup().
>   - Change the calculation method of CPU addres from subtraction to mask, and
>     add comment.
>   - Drop dma_set_mask_and_coherent().
>   - Drop set MAX_MSI_IRQS.
>   - Drop dev_dbg for Link speed.
>   - Use use the dev_err_probe() to handle the devm_clk_get() failed.
>   - Changed the redundant clock name.
>
> v2 -> v3:
>   - Update subject.
>   - Wrap description in 75 columns.
>   - Change config name to PCIE_VISCONTI_HOST.
>   - Update Kconfig text.
>   - Drop blank lines.
>   - Adjusted to 80 columns.
>   - Drop inline from functions for register access.
>   - Changed function name from visconti_pcie_check_link_status to
>     visconti_pcie_link_up.
>   - Update to using dw_pcie_host_init().
>   - Reorder these in the order of use in visconti_pcie_establish_link.
>   - Rewrite visconti_pcie_host_init() without dw_pcie_setup_rc().
>   - Change function name from  visconti_device_turnon() to
>     visconti_pcie_power_on().
>   - Unify formats such as dev_err().
>   - Drop error label in visconti_add_pcie_port().
>
> v1 -> v2:
>   - Fix typo in commit message.
>   - Drop "depends on OF && HAS_IOMEM" from Kconfig.
>   - Stop using the pointer of struct dw_pcie.
>   - Use _relaxed variant.
>   - Drop dw_pcie_wait_for_link.
>   - Drop dbi resource processing.
>   - Drop MSI IRQ initialization processing.
> ---
>  drivers/pci/controller/dwc/Kconfig         |   9 +
>  drivers/pci/controller/dwc/Makefile        |   1 +
>  drivers/pci/controller/dwc/pcie-visconti.c | 333 +++++++++++++++++++++
>  3 files changed, 343 insertions(+)
>  create mode 100644 drivers/pci/controller/dwc/pcie-visconti.c

Reviewed-by: Rob Herring <robh at kernel.org>