linux-kernel - [PATCH v2 03/18] firmware: qcom_scm-64: Make SMCCC macros less magical

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Date:   Tue, 12 Nov 2019 13:22:39 -0800
From:   Elliot Berman <eberman@...eaurora.org>
To:     bjorn.andersson@...aro.org, saiprakash.ranjan@...eaurora.org,
        agross@...nel.org, swboyd@...omium.org
Cc:     Elliot Berman <eberman@...eaurora.org>, tsoni@...eaurora.org,
        sidgup@...eaurora.org, psodagud@...eaurora.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 03/18] firmware: qcom_scm-64: Make SMCCC macros less magical

Improve understandability of SMCCC macros as they are all functions of
how many arguments can be shoved in registers and how many SCM arguments
are supported.

Signed-off-by: Elliot Berman <eberman@...eaurora.org>
---
 drivers/firmware/qcom_scm-64.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/firmware/qcom_scm-64.c b/drivers/firmware/qcom_scm-64.c
index de337b3..badc245 100644
--- a/drivers/firmware/qcom_scm-64.c
+++ b/drivers/firmware/qcom_scm-64.c
@@ -57,9 +57,9 @@ static DEFINE_MUTEX(qcom_scm_lock);
 #define QCOM_SCM_EBUSY_MAX_RETRY 20
 
 #define SMCCC_FUNCNUM(s, c)	((((s) & 0xFF) << 8) | ((c) & 0xFF))
-#define SMCCC_N_EXT_ARGS 7
-#define SMCCC_FIRST_EXT_IDX 3
-#define SMCCC_N_REG_ARGS (MAX_QCOM_SCM_ARGS - SMCCC_N_EXT_ARGS + 1)
+#define SMCCC_N_REG_ARGS	4
+#define SMCCC_FIRST_EXT_IDX	(SMCCC_N_REG_ARGS - 1)
+#define SMCCC_N_EXT_ARGS	(MAX_QCOM_SCM_ARGS - SMCCC_N_REG_ARGS + 1)
 
 static void __qcom_scm_call_do_quirk(const struct qcom_scm_desc *desc,
 			       struct arm_smccc_res *res, u32 fn_id,
-- 
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