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soc: renesas: Provide dummy rcar_rst_read_mode_pins() for compile-testing

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If the R-Car RST driver is not included, compile-testing R-Car clock
drivers fails with a link error:

    undefined reference to `rcar_rst_read_mode_pins'

To fix this, provide a dummy version.  Use the exact same test logic as
in drivers/soc/renesas/Makefile, as there is no Kconfig symbol (yet) to
control compilation of the R-Car RST driver.

Fixes: 527c02f66d263d2e ("soc: renesas: Add R-Car RST driver")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
This commit is contained in:
Geert Uytterhoeven 2017-04-25 19:36:25 +02:00 committed by Simon Horman
parent c1ae3cfa0e
commit 7b4ccb3c46
1 changed files with 5 additions and 0 deletions
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5
include/linux/soc/renesas/rcar-rst.h
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@ -1,6 +1,11 @@
#ifndef __LINUX_SOC_RENESAS_RCAR_RST_H__
#define __LINUX_SOC_RENESAS_RCAR_RST_H__
#if defined(CONFIG_ARCH_RCAR_GEN1) || defined(CONFIG_ARCH_RCAR_GEN2) || \
defined(CONFIG_ARCH_R8A7795) || defined(CONFIG_ARCH_R8A7796)
int rcar_rst_read_mode_pins(u32 *mode);
#else
static inline int rcar_rst_read_mode_pins(u32 *mode) { return -ENODEV; }
#endif
#endif /* __LINUX_SOC_RENESAS_RCAR_RST_H__ */