diff options
author | Peng Fan | 2019-04-12 07:54:50 +0000 |
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committer | Stefano Babic | 2019-04-25 09:03:15 +0200 |
commit | a87eb0405f460978e9e344dfa89e10bc447aa7a6 (patch) | |
tree | 2a39af9d81bd9609ba26dc204a366e3ca8a5e01a /arch/arm/mach-imx | |
parent | 3fbd2dce351ab5d40d3244f26bd713caa4f826e2 (diff) |
imx: sip: add call_imx_sip_ret2
This function will be used by i.MX8 fuse driver.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Diffstat (limited to 'arch/arm/mach-imx')
-rw-r--r-- | arch/arm/mach-imx/sip.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/sip.c b/arch/arm/mach-imx/sip.c index 813c2ae5e11..968e7cf3097 100644 --- a/arch/arm/mach-imx/sip.c +++ b/arch/arm/mach-imx/sip.c @@ -20,3 +20,25 @@ unsigned long call_imx_sip(unsigned long id, unsigned long reg0, return regs.regs[0]; } + +/* + * Do an SMC call to return 2 registers by having reg1 passed in by reference + */ +unsigned long call_imx_sip_ret2(unsigned long id, unsigned long reg0, + unsigned long *reg1, unsigned long reg2, + unsigned long reg3) +{ + struct pt_regs regs; + + regs.regs[0] = id; + regs.regs[1] = reg0; + regs.regs[2] = *reg1; + regs.regs[3] = reg2; + regs.regs[4] = reg3; + + smc_call(®s); + + *reg1 = regs.regs[1]; + + return regs.regs[0]; +} |