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Date: Tue, 03 Feb 2015 11:59:36 +0200
From: Stanimir Varbanov <svarbanov@...sol.com>
To: Gilad Avidov <gavidov@...eaurora.org>
CC: sdharia@...eaurora.org, mlocke@...eaurora.org,
linux-arm-msm@...r.kernel.org, gregkh@...uxfoundation.org,
linux-kernel@...r.kernel.org, iivanov@...sol.com,
galak@...eaurora.org, agross@...eaurora.org
Subject: Re: [PATCH V2 2/2] spmi: pmic_arb: add support for hw version 2
Hi Gilad,
Thanks for the patch.
On 01/31/2015 02:46 AM, Gilad Avidov wrote:
> Qualcomm PMIC Arbiter version-2 changes from version-1 are:
>
> - Some different register offsets.
> - New channel register space, one per PMIC peripheral (ppid).
> All tx traffic uses these channels.
> - New observer register space. All rx trafic uses this space.
> - Different command format for spmi command registers.
>
> Signed-off-by: Gilad Avidov <gavidov@...eaurora.org>
> Acked-by: Sagar Dharia <sdharia@...eaurora.org>
> ---
> .../bindings/spmi/qcom,spmi-pmic-arb.txt | 6 +-
> drivers/spmi/spmi-pmic-arb.c | 310 +++++++++++++++++----
> 2 files changed, 260 insertions(+), 56 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt b/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt
> index 715d099..e16b9b5 100644
> --- a/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt
> +++ b/Documentation/devicetree/bindings/spmi/qcom,spmi-pmic-arb.txt
> @@ -1,6 +1,6 @@
> Qualcomm SPMI Controller (PMIC Arbiter)
>
> -The SPMI PMIC Arbiter is found on the Snapdragon 800 Series. It is an SPMI
> +The SPMI PMIC Arbiter is found on Snapdragon chipsets. It is an SPMI
> controller with wrapping arbitration logic to allow for multiple on-chip
> devices to control a single SPMI master.
>
> @@ -19,6 +19,10 @@ Required properties:
> "core" - core registers
> "intr" - interrupt controller registers
> "cnfg" - configuration registers
> + Registers used only for V2 PMIC Arbiter:
> + "chnls" - tx-channel per virtual slave registers.
> + "obsrvr" - rx-channel (called observer) per virtual slave registers.
> +
> - reg : address + size pairs describing the PMIC arb register sets; order must
> correspond with the order of entries in reg-names
> - #address-cells : must be set to 2
> diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
> index 20559ab..818b2cf 100644
> --- a/drivers/spmi/spmi-pmic-arb.c
> +++ b/drivers/spmi/spmi-pmic-arb.c
> @@ -1,4 +1,4 @@
> -/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
> +/* Copyright (c) 2012-2015, The Linux Foundation. All rights reserved.
run checkpatch, there are tons of errors like white spaces and DOS line
ending.
> *
> * This program is free software; you can redistribute it and/or modify
> * it under the terms of the GNU General Public License version 2 and
> @@ -25,22 +25,18 @@
>
> /* PMIC Arbiter configuration registers */
> #define PMIC_ARB_VERSION 0x0000
> +#define PMIC_ARB_VERSION_V2_MIN (0x20010000)
> #define PMIC_ARB_INT_EN 0x0004
>
> -/* PMIC Arbiter channel registers */
> -#define PMIC_ARB_CMD(N) (0x0800 + (0x80 * (N)))
> -#define PMIC_ARB_CONFIG(N) (0x0804 + (0x80 * (N)))
> -#define PMIC_ARB_STATUS(N) (0x0808 + (0x80 * (N)))
> -#define PMIC_ARB_WDATA0(N) (0x0810 + (0x80 * (N)))
> -#define PMIC_ARB_WDATA1(N) (0x0814 + (0x80 * (N)))
> -#define PMIC_ARB_RDATA0(N) (0x0818 + (0x80 * (N)))
> -#define PMIC_ARB_RDATA1(N) (0x081C + (0x80 * (N)))
> -
> -/* Interrupt Controller */
> -#define SPMI_PIC_OWNER_ACC_STATUS(M, N) (0x0000 + ((32 * (M)) + (4 * (N))))
> -#define SPMI_PIC_ACC_ENABLE(N) (0x0200 + (4 * (N)))
> -#define SPMI_PIC_IRQ_STATUS(N) (0x0600 + (4 * (N)))
> -#define SPMI_PIC_IRQ_CLEAR(N) (0x0A00 + (4 * (N)))
> +/* PMIC Arbiter channel registers offsets */
> +#define PMIC_ARB_CMD (0x00)
no need braces here and below
> +#define PMIC_ARB_CONFIG (0x04)
> +#define PMIC_ARB_STATUS (0x08)
> +#define PMIC_ARB_WDATA0 (0x10)
> +#define PMIC_ARB_WDATA1 (0x14)
> +#define PMIC_ARB_RDATA0 (0x18)
> +#define PMIC_ARB_RDATA1 (0x1C)
> +#define PMIC_ARB_REG_CHNL(N) (0x800 + 0x4 * (N))
>
> /* Mapping Table */
> #define SPMI_MAPPING_TABLE_REG(N) (0x0B00 + (4 * (N)))
> @@ -52,6 +48,7 @@
>
> #define SPMI_MAPPING_TABLE_LEN 255
> #define SPMI_MAPPING_TABLE_TREE_DEPTH 16 /* Maximum of 16-bits */
> +#define PPID_TO_CHAN_TABLE_SZ BIT(12) /* PPID is 12bit chan is 1byte*/
>
> /* Ownership Table */
> #define SPMI_OWNERSHIP_TABLE_REG(N) (0x0700 + (4 * (N)))
> @@ -88,6 +85,7 @@ enum pmic_arb_cmd_op_code {
>
> /* Maximum number of support PMIC peripherals */
> #define PMIC_ARB_MAX_PERIPHS 256
> +#define PMIC_ARB_MAX_CHNL 128
> #define PMIC_ARB_PERIPH_ID_VALID (1 << 15)
> #define PMIC_ARB_TIMEOUT_US 100
> #define PMIC_ARB_MAX_TRANS_BYTES (8)
> @@ -98,14 +96,17 @@ enum pmic_arb_cmd_op_code {
> /* interrupt enable bit */
> #define SPMI_PIC_ACC_ENABLE_BIT BIT(0)
>
> +struct pmic_arb_ver_ops;
> +
> /**
> * spmi_pmic_arb_dev - SPMI PMIC Arbiter object
> *
> - * @base: address of the PMIC Arbiter core registers.
> + * @rd_base: on v1 "core", on v2 "observer" register base off DT.
> + * @wr_base: on v1 "core", on v2 "chnls" register base off DT.
> * @intr: address of the SPMI interrupt control registers.
> * @cnfg: address of the PMIC Arbiter configuration registers.
> * @lock: lock to synchronize accesses.
> - * @channel: which channel to use for accesses.
> + * @channel: which ee channel to use for accesses.
> * @irq: PMIC ARB interrupt.
> * @ee: the current Execution Environment
> * @min_apid: minimum APID (used for bounding IRQ search)
> @@ -113,10 +114,14 @@ enum pmic_arb_cmd_op_code {
> * @mapping_table: in-memory copy of PPID -> APID mapping table.
> * @domain: irq domain object for PMIC IRQ domain
> * @spmic: SPMI controller object
> - * @apid_to_ppid: cached mapping from APID to PPID
> + * @apid_to_ppid: in-memory copy of APID -> PPID mapping table.
> + * @ver_ops: version dependent operations.
> + * @ppid_to_chan in-memory copy of PPID -> channel (APID) mapping table.
> + * v2 only.
> */
> struct spmi_pmic_arb_dev {
> - void __iomem *base;
> + void __iomem *rd_base;
> + void __iomem *wr_base;
> void __iomem *intr;
> void __iomem *cnfg;
> raw_spinlock_t lock;
> @@ -129,17 +134,54 @@ struct spmi_pmic_arb_dev {
> struct irq_domain *domain;
> struct spmi_controller *spmic;
> u16 apid_to_ppid[256];
> + const struct pmic_arb_ver_ops *ver_ops;
> + u8 *ppid_to_chan;
> +};
> +
> +/**
> + * pmic_arb_ver: version dependent functionality.
> + *
> + * @non_data_cmd: on v1 issues an spmi non-data command.
> + * on v2 no HW support, returns -EOPNOTSUPP.
> + * @offset: on v1 offset of per-ee channel.
> + * on v2 offset of per-ee and per-ppid channel.
> + * @fmt_cmd: formats a GENI/SPMI command.
> + * @owner_acc_status: on v1 offset of PMIC_ARB_SPMI_PIC_OWNERm_ACC_STATUSn
> + * on v2 offset of SPMI_PIC_OWNERm_ACC_STATUSn.
> + * @acc_enable: on v1 offset of PMIC_ARB_SPMI_PIC_ACC_ENABLEn
> + * on v2 offset of SPMI_PIC_ACC_ENABLEn.
> + * @irq_status: on v1 offset of PMIC_ARB_SPMI_PIC_IRQ_STATUSn
> + * on v2 offset of SPMI_PIC_IRQ_STATUSn.
> + * @irq_clear: on v1 offset of PMIC_ARB_SPMI_PIC_IRQ_CLEARn
> + * on v2 offset of SPMI_PIC_IRQ_CLEARn.
> + */
> +struct pmic_arb_ver_ops {
> + /* spmi commands (read_cmd, write_cmd, cmd) functionality */
> + u32 (*offset)(struct spmi_pmic_arb_dev *dev, 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) */
> + u32 (*owner_acc_status)(u8 m, u8 n);
> + u32 (*acc_enable)(u8 n);
> + u32 (*irq_status)(u8 n);
> + u32 (*irq_clear)(u8 n);
> };
>
<snip>
> -static int pmic_arb_wait_for_done(struct spmi_controller *ctrl)
> +static int pmic_arb_wait_for_done(struct spmi_controller *ctrl,
> + void __iomem *base, u8 sid, u16 addr)
> {
> struct spmi_pmic_arb_dev *dev = spmi_controller_get_drvdata(ctrl);
> u32 status = 0;
> u32 timeout = PMIC_ARB_TIMEOUT_US;
> - u32 offset = PMIC_ARB_STATUS(dev->channel);
> + u32 offset = dev->ver_ops->offset(dev, sid, addr) + PMIC_ARB_STATUS;
I'd rename this to status, it is the arbiter status. But as this is the
name in the original code it depends on you.
>
> while (timeout--) {
> status = pmic_arb_base_read(dev, offset);
> @@ -211,28 +254,46 @@ static int pmic_arb_wait_for_done(struct spmi_controller *ctrl)
> return -ETIMEDOUT;
> }
>
> -/* Non-data command */
> -static int pmic_arb_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid)
> +static int
> +pmic_arb_non_data_cmd_v1(struct spmi_controller *ctrl, u8 opc, u8 sid)
> {
> struct spmi_pmic_arb_dev *pmic_arb = spmi_controller_get_drvdata(ctrl);
> unsigned long flags;
> u32 cmd;
> int rc;
> -
> - /* Check for valid non-data command */
> - if (opc < SPMI_CMD_RESET || opc > SPMI_CMD_WAKEUP)
> - return -EINVAL;
> + u32 offset = pmic_arb->ver_ops->offset(pmic_arb, sid, 0);
>
> cmd = ((opc | 0x40) << 27) | ((sid & 0xf) << 20);
>
> raw_spin_lock_irqsave(&pmic_arb->lock, flags);
> - pmic_arb_base_write(pmic_arb, PMIC_ARB_CMD(pmic_arb->channel), cmd);
> - rc = pmic_arb_wait_for_done(ctrl);
> + pmic_arb_base_write(pmic_arb, offset + PMIC_ARB_CMD, cmd);
> + rc = pmic_arb_wait_for_done(ctrl, pmic_arb->wr_base, sid, 0);
> raw_spin_unlock_irqrestore(&pmic_arb->lock, flags);
>
> return rc;
> }
>
> +/* Unsupported by HW */
this comemnt is useless.
> +static int
> +pmic_arb_non_data_cmd_v2(struct spmi_controller *ctrl, u8 opc, u8 sid)
> +{
> + return -EOPNOTSUPP;
> +}
> +
> +/* Non-data command */
> +static int pmic_arb_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid)
> +{
> + struct spmi_pmic_arb_dev *pmic_arb = spmi_controller_get_drvdata(ctrl);
> +
> + pr_debug("op:0x%x sid:%d\n", opc, sid);
you should use dev_dbg.
> +
> + /* Check for valid non-data command */
> + if (opc < SPMI_CMD_RESET || opc > SPMI_CMD_WAKEUP)
> + return -EINVAL;
> +
> + return pmic_arb->ver_ops->non_data_cmd(ctrl, opc, sid);
> +}
> +
> static int pmic_arb_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
> u16 addr, u8 *buf, size_t len)
> {
> @@ -241,6 +302,7 @@ static int pmic_arb_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
> u8 bc = len - 1;
> u32 cmd;
> int rc;
> + phys_addr_t offset = pmic_arb->ver_ops->offset(pmic_arb, sid, addr);
u32? offset() op returns u32.
>
> if (bc >= PMIC_ARB_MAX_TRANS_BYTES) {
> dev_err(&ctrl->dev,
> @@ -259,20 +321,20 @@ static int pmic_arb_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
> else
> return -EINVAL;
>
> - cmd = (opc << 27) | ((sid & 0xf) << 20) | (addr << 4) | (bc & 0x7);
> + cmd = pmic_arb->ver_ops->fmt_cmd(opc, sid, addr, bc);
>
> raw_spin_lock_irqsave(&pmic_arb->lock, flags);
> - pmic_arb_base_write(pmic_arb, PMIC_ARB_CMD(pmic_arb->channel), cmd);
> - rc = pmic_arb_wait_for_done(ctrl);
> + pmic_arb_set_rd_cmd(pmic_arb, offset + PMIC_ARB_CMD, cmd);
> + rc = pmic_arb_wait_for_done(ctrl, pmic_arb->rd_base, sid, addr);
> if (rc)
> goto done;
>
> - pa_read_data(pmic_arb, buf, PMIC_ARB_RDATA0(pmic_arb->channel),
> + pa_read_data(pmic_arb, buf, offset + PMIC_ARB_RDATA0,
> min_t(u8, bc, 3));
>
> if (bc > 3)
> pa_read_data(pmic_arb, buf + 4,
> - PMIC_ARB_RDATA1(pmic_arb->channel), bc - 4);
> + offset + PMIC_ARB_RDATA1, bc - 4);
>
> done:
> raw_spin_unlock_irqrestore(&pmic_arb->lock, flags);
> @@ -287,6 +349,7 @@ static int pmic_arb_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
> u8 bc = len - 1;
> u32 cmd;
> int rc;
> + u32 offset = pmic_arb->ver_ops->offset(pmic_arb, sid, addr);
>
> if (bc >= PMIC_ARB_MAX_TRANS_BYTES) {
> dev_err(&ctrl->dev,
> @@ -307,19 +370,19 @@ static int pmic_arb_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
> else
> return -EINVAL;
>
> - cmd = (opc << 27) | ((sid & 0xf) << 20) | (addr << 4) | (bc & 0x7);
> + cmd = pmic_arb->ver_ops->fmt_cmd(opc, sid, addr, bc);
>
> /* Write data to FIFOs */
> raw_spin_lock_irqsave(&pmic_arb->lock, flags);
> - pa_write_data(pmic_arb, buf, PMIC_ARB_WDATA0(pmic_arb->channel)
> + pa_write_data(pmic_arb, buf, offset + PMIC_ARB_WDATA0
> , min_t(u8, bc, 3));
coding style: comma should be on upper line
> if (bc > 3)
> pa_write_data(pmic_arb, buf + 4,
> - PMIC_ARB_WDATA1(pmic_arb->channel), bc - 4);
> + offset + PMIC_ARB_WDATA1, bc - 4);
>
> /* Start the transaction */
> - pmic_arb_base_write(pmic_arb, PMIC_ARB_CMD(pmic_arb->channel), cmd);
> - rc = pmic_arb_wait_for_done(ctrl);
> + pmic_arb_base_write(pmic_arb, offset + PMIC_ARB_CMD, cmd);
> + rc = pmic_arb_wait_for_done(ctrl, pmic_arb->wr_base, sid, addr);
> raw_spin_unlock_irqrestore(&pmic_arb->lock, flags);
>
> return rc;
> @@ -376,7 +439,7 @@ static void periph_interrupt(struct spmi_pmic_arb_dev *pa, u8 apid)
> u32 status;
> int id;
>
> - status = readl_relaxed(pa->intr + SPMI_PIC_IRQ_STATUS(apid));
> + status = readl_relaxed(pa->intr + pa->ver_ops->irq_status(apid));
> while (status) {
> id = ffs(status) - 1;
> status &= ~(1 << id);
> @@ -402,7 +465,7 @@ static void pmic_arb_chained_irq(unsigned int irq, struct irq_desc *desc)
>
> for (i = first; i <= last; ++i) {
> status = readl_relaxed(intr +
> - SPMI_PIC_OWNER_ACC_STATUS(pa->ee, i));
> + pa->ver_ops->owner_acc_status(pa->ee, i));
> while (status) {
> id = ffs(status) - 1;
> status &= ~(1 << id);
> @@ -422,7 +485,7 @@ static void qpnpint_irq_ack(struct irq_data *d)
> u8 data;
>
> raw_spin_lock_irqsave(&pa->lock, flags);
> - writel_relaxed(1 << irq, pa->intr + SPMI_PIC_IRQ_CLEAR(apid));
> + writel_relaxed(1 << irq, pa->intr + pa->ver_ops->irq_clear(apid));
> raw_spin_unlock_irqrestore(&pa->lock, flags);
>
> data = 1 << irq;
> @@ -439,10 +502,11 @@ static void qpnpint_irq_mask(struct irq_data *d)
> u8 data;
>
> raw_spin_lock_irqsave(&pa->lock, flags);
> - status = readl_relaxed(pa->intr + SPMI_PIC_ACC_ENABLE(apid));
> + status = readl_relaxed(pa->intr + pa->ver_ops->acc_enable(apid));
> if (status & SPMI_PIC_ACC_ENABLE_BIT) {
> status = status & ~SPMI_PIC_ACC_ENABLE_BIT;
> - writel_relaxed(status, pa->intr + SPMI_PIC_ACC_ENABLE(apid));
> + writel_relaxed(status, pa->intr +
> + pa->ver_ops->acc_enable(apid));
> }
> raw_spin_unlock_irqrestore(&pa->lock, flags);
>
> @@ -460,10 +524,10 @@ static void qpnpint_irq_unmask(struct irq_data *d)
> u8 data;
>
> raw_spin_lock_irqsave(&pa->lock, flags);
> - status = readl_relaxed(pa->intr + SPMI_PIC_ACC_ENABLE(apid));
> + status = readl_relaxed(pa->intr + pa->ver_ops->acc_enable(apid));
> if (!(status & SPMI_PIC_ACC_ENABLE_BIT)) {
> writel_relaxed(status | SPMI_PIC_ACC_ENABLE_BIT,
> - pa->intr + SPMI_PIC_ACC_ENABLE(apid));
> + pa->intr + pa->ver_ops->acc_enable(apid));
> }
> raw_spin_unlock_irqrestore(&pa->lock, flags);
>
> @@ -624,6 +688,91 @@ static int qpnpint_irq_domain_map(struct irq_domain *d,
> return 0;
> }
>
> +/* v1 offset per ee */
> +static u32 pmic_arb_offset_v1(struct spmi_pmic_arb_dev *pa, u8 sid, u16 addr)
> +{
> + return 0x800 + 0x80 * (pa->channel);
no braces here and in below ops
> +}
> +
> +/* v2 offset per ppid (chan) and per ee */
> +static u32 pmic_arb_offset_v2(struct spmi_pmic_arb_dev *pa, u8 sid, u16 addr)
> +{
> + u16 ppid = (sid << 8) | (addr >> 8);
> + u8 chan = pa->ppid_to_chan[ppid];
> +
> + return 0x1000 * pa->ee + 0x8000 * chan;
> +}
> +
> +static u32 pmic_arb_fmt_cmd_v1(u8 opc, u8 sid, u16 addr, u8 bc)
> +{
> + return (opc << 27) | ((sid & 0xf) << 20) | (addr << 4) | (bc & 0x7);
> +}
> +
> +static u32 pmic_arb_fmt_cmd_v2(u8 opc, u8 sid, u16 addr, u8 bc)
> +{
> + return (opc << 27) | ((addr & 0xff) << 4) | (bc & 0x7);
> +}
> +
> +static u32 pmic_arb_owner_acc_status_v1(u8 m, u8 n)
> +{
> + return 0x20 * (m) + 0x4 * (n);
> +}
> +
> +static u32 pmic_arb_owner_acc_status_v2(u8 m, u8 n)
> +{
> + return 0x100000 + 0x1000 * (m) + 0x4 * (n);
> +}
> +
> +static u32 pmic_arb_acc_enable_v1(u8 n)
> +{
> + return 0x200 + 0x4 * (n);
> +}
> +
> +static u32 pmic_arb_acc_enable_v2(u8 n)
> +{
> + return 0x1000 * (n);
> +}
> +
> +static u32 pmic_arb_irq_status_v1(u8 n)
> +{
> + return 0x600 + 0x4 * (n);
> +}
> +
> +static u32 pmic_arb_irq_status_v2(u8 n)
> +{
> + return 0x4 + 0x1000 * (n);
> +}
> +
> +static u32 pmic_arb_irq_clear_v1(u8 n)
> +{
> + return 0xA00 + 0x4 * (n);
> +}
> +
> +static u32 pmic_arb_irq_clear_v2(u8 n)
> +{
> + return 0x8 + 0x1000 * (n);
> +}
> +
> +static const struct pmic_arb_ver_ops pmic_arb_v1 = {
> + .non_data_cmd = pmic_arb_non_data_cmd_v1,
> + .offset = pmic_arb_offset_v1,
> + .fmt_cmd = pmic_arb_fmt_cmd_v1,
> + .owner_acc_status = pmic_arb_owner_acc_status_v1,
> + .acc_enable = pmic_arb_acc_enable_v1,
> + .irq_status = pmic_arb_irq_status_v1,
> + .irq_clear = pmic_arb_irq_clear_v1,
> +};
> +
> +static const struct pmic_arb_ver_ops pmic_arb_v2 = {
> + .non_data_cmd = pmic_arb_non_data_cmd_v2,
> + .offset = pmic_arb_offset_v2,
> + .fmt_cmd = pmic_arb_fmt_cmd_v2,
> + .owner_acc_status = pmic_arb_owner_acc_status_v2,
> + .acc_enable = pmic_arb_acc_enable_v2,
> + .irq_status = pmic_arb_irq_status_v2,
> + .irq_clear = pmic_arb_irq_clear_v2,
> +};
> +
> static const struct irq_domain_ops pmic_arb_irq_domain_ops = {
> .map = qpnpint_irq_domain_map,
> .xlate = qpnpint_irq_domain_dt_translate,
> @@ -634,8 +783,9 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
> struct spmi_pmic_arb_dev *pa;
> struct spmi_controller *ctrl;
> struct resource *res;
> - u32 channel, ee;
> + u32 channel, ee, hw_ver;
> int err, i;
> + bool is_v1;
>
> ctrl = spmi_controller_alloc(&pdev->dev, sizeof(*pa));
> if (!ctrl)
> @@ -645,12 +795,65 @@ static int spmi_pmic_arb_probe(struct platform_device *pdev)
> pa->spmic = ctrl;
>
> res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "core");
> - pa->base = devm_ioremap_resource(&ctrl->dev, res);
> - if (IS_ERR(pa->base)) {
> - err = PTR_ERR(pa->base);
> + pa->rd_base = devm_ioremap_resource(&ctrl->dev, res);
> + if (IS_ERR(pa->rd_base)) {
> + err = PTR_ERR(pa->rd_base);
> goto err_put_ctrl;
> }
>
> + hw_ver = readl_relaxed(pa->rd_base + PMIC_ARB_VERSION);
> + is_v1 = (hw_ver < PMIC_ARB_VERSION_V2_MIN);
> +
> + dev_info(&ctrl->dev, "PMIC Arb Version-%d (0x%x)\n", (is_v1 ? 1 : 2),
> + hw_ver);
> +
> + if (is_v1) {
> + pa->ver_ops = &pmic_arb_v1;
> + pa->wr_base = pa->rd_base;
> + } else {
> + u8 chan;
> + u16 ppid;
> + u32 regval;
> +
> + pa->ver_ops = &pmic_arb_v2;
> +
> + pa->ppid_to_chan = devm_kzalloc(&ctrl->dev,
> + PPID_TO_CHAN_TABLE_SZ, GFP_KERNEL);
> + if (!pa->ppid_to_chan) {
> + err = -ENOMEM;
> + goto err_put_ctrl;
> + }
> + /*
> + * PMIC_ARB_REG_CHNL is a table in HW mapping channel to ppid.
> + * ppid_to_chan is an in-memory invert of that table.
> + */
> + for (chan = 0; chan < PMIC_ARB_MAX_CHNL; ++chan) {
> + regval = readl_relaxed(pa->rd_base +
> + PMIC_ARB_REG_CHNL(chan));
> + if (!regval)
> + continue;
> +
> + ppid = (regval >> 8) & 0xFFF;
> + pa->ppid_to_chan[ppid] = chan;
> + }
> +
> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
> + "obsrvr");
coding style: "obsrvr" should start on the same coloumn as pdev. This
comment is valid to many places in this patch.
<snip>
I played a bit with slave device (RTC) on device with pmic arbiter v2,
so now the interrupts works.
--
regards,
Stan
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