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The register region is ioremap'ed in the tmio_mmc_host_probe(), i.e. drivers cannot get access to the hardware before mmc_add_host(). Actually, renesas_sdhi_core.c reads out the CTL_VERSION register to complete the platform-specific settings. However, at this point, the MMC host is already running. Move the register ioremap to tmio_mmc_host_alloc() so that drivers can perform platform-specific settings between tmio_mmc_host_alloc() and tmio_mmc_host_probe(). I changed tmio_mmc_host_alloc() to return an error pointer to propagate the return code from devm_ioremap_resource(). Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.