From ff615ed91b5dffa0f1977ee1d703f697e2b4d62f Mon Sep 17 00:00:00 2001 From: Kiran Gunda Date: Fri, 28 Jul 2017 12:40:42 +0530 Subject: [PATCH] spmi: pmic-arb: return the value instead of passing by pointer Returning the output value from a function, when it is possible, is the better and cleaner way than passing it by the pointer. Hence, modify the ppid_to_apid mapping function to return apid instead of passing it by a pointer. While at it, pass the ppid as function parameter to ppid_to_apid mapping function instead of passing the sid and addr. Signed-off-by: Kiran Gunda Reviewed-by: Stephen Boyd Signed-off-by: Greg Kroah-Hartman --- drivers/spmi/spmi-pmic-arb.c | 82 ++++++++++++++++++------------------ 1 file changed, 40 insertions(+), 42 deletions(-) diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c index a9d93594e593..2f9875a25e00 100644 --- a/drivers/spmi/spmi-pmic-arb.c +++ b/drivers/spmi/spmi-pmic-arb.c @@ -178,11 +178,9 @@ struct spmi_pmic_arb { */ struct pmic_arb_ver_ops { const char *ver_str; - int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr, - u16 *apid); + int (*ppid_to_apid)(struct spmi_pmic_arb *pmic_arb, u16 ppid); /* spmi commands (read_cmd, write_cmd, cmd) functionality */ - int (*offset)(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr, - u32 *offset); + int (*offset)(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr); u32 (*fmt_cmd)(u8 opc, u8 sid, u16 addr, u8 bc); int (*non_data_cmd)(struct spmi_controller *ctrl, u8 opc, u8 sid); /* Interrupts controller functionality (offset of PIC registers) */ @@ -242,10 +240,11 @@ static int pmic_arb_wait_for_done(struct spmi_controller *ctrl, u32 offset; int rc; - rc = pmic_arb->ver_ops->offset(pmic_arb, sid, addr, &offset); - if (rc) + rc = pmic_arb->ver_ops->offset(pmic_arb, sid, addr); + if (rc < 0) return rc; + offset = rc; offset += PMIC_ARB_STATUS; while (timeout--) { @@ -289,10 +288,11 @@ pmic_arb_non_data_cmd_v1(struct spmi_controller *ctrl, u8 opc, u8 sid) int rc; u32 offset; - rc = pmic_arb->ver_ops->offset(pmic_arb, sid, 0, &offset); - if (rc) + rc = pmic_arb->ver_ops->offset(pmic_arb, sid, 0); + if (rc < 0) return rc; + offset = rc; cmd = ((opc | 0x40) << 27) | ((sid & 0xf) << 20); raw_spin_lock_irqsave(&pmic_arb->lock, flags); @@ -333,10 +333,11 @@ static int pmic_arb_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid, int rc; u32 offset; - rc = pmic_arb->ver_ops->offset(pmic_arb, sid, addr, &offset); - if (rc) + rc = pmic_arb->ver_ops->offset(pmic_arb, sid, addr); + if (rc < 0) return rc; + offset = rc; if (bc >= PMIC_ARB_MAX_TRANS_BYTES) { dev_err(&ctrl->dev, "pmic-arb supports 1..%d bytes per trans, but:%zu requested", PMIC_ARB_MAX_TRANS_BYTES, len); @@ -383,10 +384,11 @@ static int pmic_arb_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid, int rc; u32 offset; - rc = pmic_arb->ver_ops->offset(pmic_arb, sid, addr, &offset); - if (rc) + rc = pmic_arb->ver_ops->offset(pmic_arb, sid, addr); + if (rc < 0) return rc; + offset = rc; if (bc >= PMIC_ARB_MAX_TRANS_BYTES) { dev_err(&ctrl->dev, "pmic-arb supports 1..%d bytes per trans, but:%zu requested", PMIC_ARB_MAX_TRANS_BYTES, len); @@ -655,8 +657,8 @@ static int qpnpint_irq_domain_dt_translate(struct irq_domain *d, unsigned int *out_type) { struct spmi_pmic_arb *pmic_arb = d->host_data; + u16 apid, ppid; int rc; - u16 apid; dev_dbg(&pmic_arb->spmic->dev, "intspec[0] 0x%1x intspec[1] 0x%02x intspec[2] 0x%02x\n", intspec[0], intspec[1], intspec[2]); @@ -668,14 +670,15 @@ static int qpnpint_irq_domain_dt_translate(struct irq_domain *d, if (intspec[0] > 0xF || intspec[1] > 0xFF || intspec[2] > 0x7) return -EINVAL; - rc = pmic_arb->ver_ops->ppid_to_apid(pmic_arb, intspec[0], - (intspec[1] << 8), &apid); + ppid = intspec[0] << 8 | intspec[1]; + rc = pmic_arb->ver_ops->ppid_to_apid(pmic_arb, ppid); if (rc < 0) { dev_err(&pmic_arb->spmic->dev, "failed to xlate sid = 0x%x, periph = 0x%x, irq = %x rc = %d\n", intspec[0], intspec[1], intspec[2], rc); return rc; } + apid = rc; /* Keep track of {max,min}_apid for bounding search during interrupt */ if (apid > pmic_arb->max_apid) pmic_arb->max_apid = apid; @@ -704,19 +707,18 @@ static int qpnpint_irq_domain_map(struct irq_domain *d, return 0; } -static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pmic_arb, u8 sid, - u16 addr, u16 *apid) +static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pmic_arb, u16 ppid) { - u16 ppid = sid << 8 | ((addr >> 8) & 0xFF); u32 *mapping_table = pmic_arb->mapping_table; int index = 0, i; u16 apid_valid; + u16 apid; u32 data; apid_valid = pmic_arb->ppid_to_apid[ppid]; if (apid_valid & PMIC_ARB_APID_VALID) { - *apid = apid_valid & ~PMIC_ARB_APID_VALID; - return 0; + apid = apid_valid & ~PMIC_ARB_APID_VALID; + return apid; } for (i = 0; i < SPMI_MAPPING_TABLE_TREE_DEPTH; ++i) { @@ -730,21 +732,21 @@ static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pmic_arb, u8 sid, if (SPMI_MAPPING_BIT_IS_1_FLAG(data)) { index = SPMI_MAPPING_BIT_IS_1_RESULT(data); } else { - *apid = SPMI_MAPPING_BIT_IS_1_RESULT(data); + apid = SPMI_MAPPING_BIT_IS_1_RESULT(data); pmic_arb->ppid_to_apid[ppid] - = *apid | PMIC_ARB_APID_VALID; - pmic_arb->apid_data[*apid].ppid = ppid; - return 0; + = apid | PMIC_ARB_APID_VALID; + pmic_arb->apid_data[apid].ppid = ppid; + return apid; } } else { if (SPMI_MAPPING_BIT_IS_0_FLAG(data)) { index = SPMI_MAPPING_BIT_IS_0_RESULT(data); } else { - *apid = SPMI_MAPPING_BIT_IS_0_RESULT(data); + apid = SPMI_MAPPING_BIT_IS_0_RESULT(data); pmic_arb->ppid_to_apid[ppid] - = *apid | PMIC_ARB_APID_VALID; - pmic_arb->apid_data[*apid].ppid = ppid; - return 0; + = apid | PMIC_ARB_APID_VALID; + pmic_arb->apid_data[apid].ppid = ppid; + return apid; } } } @@ -753,11 +755,9 @@ static int pmic_arb_ppid_to_apid_v1(struct spmi_pmic_arb *pmic_arb, u8 sid, } /* v1 offset per ee */ -static int pmic_arb_offset_v1(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr, - u32 *offset) +static int pmic_arb_offset_v1(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr) { - *offset = 0x800 + 0x80 * pmic_arb->channel; - return 0; + return 0x800 + 0x80 * pmic_arb->channel; } static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid) @@ -796,10 +796,8 @@ static u16 pmic_arb_find_apid(struct spmi_pmic_arb *pmic_arb, u16 ppid) return apid; } -static int pmic_arb_ppid_to_apid_v2(struct spmi_pmic_arb *pmic_arb, u8 sid, - u16 addr, u16 *apid) +static int pmic_arb_ppid_to_apid_v2(struct spmi_pmic_arb *pmic_arb, u16 ppid) { - u16 ppid = (sid << 8) | (addr >> 8); u16 apid_valid; apid_valid = pmic_arb->ppid_to_apid[ppid]; @@ -808,23 +806,23 @@ static int pmic_arb_ppid_to_apid_v2(struct spmi_pmic_arb *pmic_arb, u8 sid, if (!(apid_valid & PMIC_ARB_APID_VALID)) return -ENODEV; - *apid = apid_valid & ~PMIC_ARB_APID_VALID; - return 0; + return apid_valid & ~PMIC_ARB_APID_VALID; } /* v2 offset per ppid and per ee */ -static int pmic_arb_offset_v2(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr, - u32 *offset) +static int pmic_arb_offset_v2(struct spmi_pmic_arb *pmic_arb, u8 sid, u16 addr) { u16 apid; + u16 ppid; int rc; - rc = pmic_arb_ppid_to_apid_v2(pmic_arb, sid, addr, &apid); + ppid = sid << 8 | ((addr >> 8) & 0xFF); + rc = pmic_arb_ppid_to_apid_v2(pmic_arb, ppid); if (rc < 0) return rc; - *offset = 0x1000 * pmic_arb->ee + 0x8000 * apid; - return 0; + apid = rc; + return 0x1000 * pmic_arb->ee + 0x8000 * apid; } static u32 pmic_arb_fmt_cmd_v1(u8 opc, u8 sid, u16 addr, u8 bc) -- 2.20.1