mmc: sdhci-of-at91: make MMC_SDHCI_OF_AT91 depend on HAVE_CLK

If sdhci-of-at91.c is compiled without CONFIG_HAVE_CLK, the line

  caps1 |= FIELD_PREP(SDHCI_CLOCK_MUL_MASK, clk_mul);

... emits "FIELD_PREP: value too large for the field" warning.

The compiler seems to decide clk_mul is constant (unsigned int)-1,
because clk_get_rate() returns 0 when CONFIG_HAVE_CLK is disabled.

Add HAVE_CLK to the depenency since this driver does not work without
the clock APIs anyway.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Suggested-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Link: https://lore.kernel.org/r/20200422153401.7913-1-yamada.masahiro@socionext.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested

diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
index 462b535..2aee844 100644 (file)
--- a/drivers/mmc/host/Kconfig
+++ b/drivers/mmc/host/Kconfig
@@ -171,7 +171,7 @@ config MMC_SDHCI_OF_ASPEED
 config MMC_SDHCI_OF_AT91
        tristate "SDHCI OF support for the Atmel SDMMC controller"
        depends on MMC_SDHCI_PLTFM
-       depends on OF
+       depends on OF && HAVE_CLK
        help
          This selects the Atmel SDMMC driver