From ae32a5b321c8484294d129e7980f8fcf35aa42af Mon Sep 17 00:00:00 2001 From: Chao Xie Date: Fri, 31 Oct 2014 10:13:48 +0800 Subject: clk: mmp: add reset support Some clock control regsiter has bit to reset the cotroller. So before enable the clock, we need deassert the reset pin. Make use of reset controller framework to export reset interface for device drivers, then device driver can control the reset action. Signed-off-by: Chao Xie Acked-by: Haojian Zhuang Signed-off-by: Michael Turquette --- drivers/clk/mmp/reset.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 drivers/clk/mmp/reset.h (limited to 'drivers/clk/mmp/reset.h') diff --git a/drivers/clk/mmp/reset.h b/drivers/clk/mmp/reset.h new file mode 100644 index 000000000000..be8b1a7000f7 --- /dev/null +++ b/drivers/clk/mmp/reset.h @@ -0,0 +1,31 @@ +#ifndef __MACH_MMP_CLK_RESET_H +#define __MACH_MMP_CLK_RESET_H + +#include + +#define MMP_RESET_INVERT 1 + +struct mmp_clk_reset_cell { + unsigned int clk_id; + void __iomem *reg; + u32 bits; + unsigned int flags; + spinlock_t *lock; +}; + +struct mmp_clk_reset_unit { + struct reset_controller_dev rcdev; + struct mmp_clk_reset_cell *cells; +}; + +#ifdef CONFIG_RESET_CONTROLLER +void mmp_clk_reset_register(struct device_node *np, + struct mmp_clk_reset_cell *cells, int nr_resets); +#else +static inline void mmp_clk_reset_register(struct device_node *np, + struct mmp_clk_reset_cell *cells, int nr_resets) +{ +} +#endif + +#endif -- cgit v1.2.3