--- /dev/null
--- /dev/null
--- /dev/null
- - -- struct clk *spi_clk, *parent_clk;
++ +/*
++ + * Copyright (c) 2015 MediaTek Inc.
++ + * Author: Leilk Liu <leilk.liu@mediatek.com>
++ + *
++ + * This program is free software; you can redistribute it and/or modify
++ + * it under the terms of the GNU General Public License version 2 as
++ + * published by the Free Software Foundation.
++ + *
++ + * This program is distributed in the hope that it will be useful,
++ + * but WITHOUT ANY WARRANTY; without even the implied warranty of
++ + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
++ + * GNU General Public License for more details.
++ + */
++ +
++ +#include <linux/clk.h>
++ +#include <linux/device.h>
++ +#include <linux/err.h>
++ +#include <linux/interrupt.h>
++ +#include <linux/io.h>
++ +#include <linux/ioport.h>
++ +#include <linux/module.h>
++ +#include <linux/of.h>
++ +#include <linux/platform_device.h>
++ +#include <linux/platform_data/spi-mt65xx.h>
++ +#include <linux/pm_runtime.h>
++ +#include <linux/spi/spi.h>
++ +
++ +#define SPI_CFG0_REG 0x0000
++ +#define SPI_CFG1_REG 0x0004
++ +#define SPI_TX_SRC_REG 0x0008
++ +#define SPI_RX_DST_REG 0x000c
++ +#define SPI_TX_DATA_REG 0x0010
++ +#define SPI_RX_DATA_REG 0x0014
++ +#define SPI_CMD_REG 0x0018
++ +#define SPI_STATUS0_REG 0x001c
++ +#define SPI_PAD_SEL_REG 0x0024
++ +
++ +#define SPI_CFG0_SCK_HIGH_OFFSET 0
++ +#define SPI_CFG0_SCK_LOW_OFFSET 8
++ +#define SPI_CFG0_CS_HOLD_OFFSET 16
++ +#define SPI_CFG0_CS_SETUP_OFFSET 24
++ +
++ +#define SPI_CFG1_CS_IDLE_OFFSET 0
++ +#define SPI_CFG1_PACKET_LOOP_OFFSET 8
++ +#define SPI_CFG1_PACKET_LENGTH_OFFSET 16
++ +#define SPI_CFG1_GET_TICK_DLY_OFFSET 30
++ +
++ +#define SPI_CFG1_CS_IDLE_MASK 0xff
++ +#define SPI_CFG1_PACKET_LOOP_MASK 0xff00
++ +#define SPI_CFG1_PACKET_LENGTH_MASK 0x3ff0000
++ +
++ +#define SPI_CMD_ACT BIT(0)
++ +#define SPI_CMD_RESUME BIT(1)
++ +#define SPI_CMD_RST BIT(2)
++ +#define SPI_CMD_PAUSE_EN BIT(4)
++ +#define SPI_CMD_DEASSERT BIT(5)
++ +#define SPI_CMD_CPHA BIT(8)
++ +#define SPI_CMD_CPOL BIT(9)
++ +#define SPI_CMD_RX_DMA BIT(10)
++ +#define SPI_CMD_TX_DMA BIT(11)
++ +#define SPI_CMD_TXMSBF BIT(12)
++ +#define SPI_CMD_RXMSBF BIT(13)
++ +#define SPI_CMD_RX_ENDIAN BIT(14)
++ +#define SPI_CMD_TX_ENDIAN BIT(15)
++ +#define SPI_CMD_FINISH_IE BIT(16)
++ +#define SPI_CMD_PAUSE_IE BIT(17)
++ +
++ +#define MT8173_SPI_MAX_PAD_SEL 3
++ +
++ +#define MTK_SPI_PAUSE_INT_STATUS 0x2
++ +
++ +#define MTK_SPI_IDLE 0
++ +#define MTK_SPI_PAUSED 1
++ +
++ +#define MTK_SPI_MAX_FIFO_SIZE 32
++ +#define MTK_SPI_PACKET_SIZE 1024
++ +
++ +struct mtk_spi_compatible {
++ + bool need_pad_sel;
++ + /* Must explicitly send dummy Tx bytes to do Rx only transfer */
++ + bool must_tx;
++ +};
++ +
++ +struct mtk_spi {
++ + void __iomem *base;
++ + u32 state;
++ + u32 pad_sel;
- --- static int mtk_spi_prepare_hardware(struct spi_master *master)
- --- {
- --- struct spi_transfer *trans;
- --- struct mtk_spi *mdata = spi_master_get_devdata(master);
- --- struct spi_message *msg = master->cur_msg;
- ---
- --- trans = list_first_entry(&msg->transfers, struct spi_transfer,
- --- transfer_list);
- --- if (!trans->cs_change) {
- --- mdata->state = MTK_SPI_IDLE;
- --- mtk_spi_reset(mdata);
- --- }
- ---
- --- return 0;
- --- }
- ---
++++ +++ struct clk *parent_clk, *sel_clk, *spi_clk;
++ + struct spi_transfer *cur_transfer;
++ + u32 xfer_len;
++ + struct scatterlist *tx_sgl, *rx_sgl;
++ + u32 tx_sgl_len, rx_sgl_len;
++ + const struct mtk_spi_compatible *dev_comp;
++ +};
++ +
++ +static const struct mtk_spi_compatible mt6589_compat;
++ +static const struct mtk_spi_compatible mt8135_compat;
++ +static const struct mtk_spi_compatible mt8173_compat = {
++ + .need_pad_sel = true,
++ + .must_tx = true,
++ +};
++ +
++ +/*
++ + * A piece of default chip info unless the platform
++ + * supplies it.
++ + */
++ +static const struct mtk_chip_config mtk_default_chip_info = {
++ + .rx_mlsb = 1,
++ + .tx_mlsb = 1,
++ +};
++ +
++ +static const struct of_device_id mtk_spi_of_match[] = {
++ + { .compatible = "mediatek,mt6589-spi", .data = (void *)&mt6589_compat },
++ + { .compatible = "mediatek,mt8135-spi", .data = (void *)&mt8135_compat },
++ + { .compatible = "mediatek,mt8173-spi", .data = (void *)&mt8173_compat },
++ + {}
++ +};
++ +MODULE_DEVICE_TABLE(of, mtk_spi_of_match);
++ +
++ +static void mtk_spi_reset(struct mtk_spi *mdata)
++ +{
++ + u32 reg_val;
++ +
++ + /* set the software reset bit in SPI_CMD_REG. */
++ + reg_val = readl(mdata->base + SPI_CMD_REG);
++ + reg_val |= SPI_CMD_RST;
++ + writel(reg_val, mdata->base + SPI_CMD_REG);
++ +
++ + reg_val = readl(mdata->base + SPI_CMD_REG);
++ + reg_val &= ~SPI_CMD_RST;
++ + writel(reg_val, mdata->base + SPI_CMD_REG);
++ +}
++ +
++ +static void mtk_spi_config(struct mtk_spi *mdata,
++ + struct mtk_chip_config *chip_config)
++ +{
++ + u32 reg_val;
++ +
++ + reg_val = readl(mdata->base + SPI_CMD_REG);
++ +
++ + /* set the mlsbx and mlsbtx */
++ + if (chip_config->tx_mlsb)
++ + reg_val |= SPI_CMD_TXMSBF;
++ + else
++ + reg_val &= ~SPI_CMD_TXMSBF;
++ + if (chip_config->rx_mlsb)
++ + reg_val |= SPI_CMD_RXMSBF;
++ + else
++ + reg_val &= ~SPI_CMD_RXMSBF;
++ +
++ + /* set the tx/rx endian */
++ +#ifdef __LITTLE_ENDIAN
++ + reg_val &= ~SPI_CMD_TX_ENDIAN;
++ + reg_val &= ~SPI_CMD_RX_ENDIAN;
++ +#else
++ + reg_val |= SPI_CMD_TX_ENDIAN;
++ + reg_val |= SPI_CMD_RX_ENDIAN;
++ +#endif
++ +
++ + /* set finish and pause interrupt always enable */
++ + reg_val |= SPI_CMD_FINISH_IE | SPI_CMD_PAUSE_IE;
++ +
++ + /* disable dma mode */
++ + reg_val &= ~(SPI_CMD_TX_DMA | SPI_CMD_RX_DMA);
++ +
++ + /* disable deassert mode */
++ + reg_val &= ~SPI_CMD_DEASSERT;
++ +
++ + writel(reg_val, mdata->base + SPI_CMD_REG);
++ +
++ + /* pad select */
++ + if (mdata->dev_comp->need_pad_sel)
++ + writel(mdata->pad_sel, mdata->base + SPI_PAD_SEL_REG);
++ +}
++ +
- --- if (!enable)
++ +static int mtk_spi_prepare_message(struct spi_master *master,
++ + struct spi_message *msg)
++ +{
++ + u32 reg_val;
++ + u8 cpha, cpol;
++ + struct mtk_chip_config *chip_config;
++ + struct spi_device *spi = msg->spi;
++ + struct mtk_spi *mdata = spi_master_get_devdata(master);
++ +
++ + cpha = spi->mode & SPI_CPHA ? 1 : 0;
++ + cpol = spi->mode & SPI_CPOL ? 1 : 0;
++ +
++ + reg_val = readl(mdata->base + SPI_CMD_REG);
++ + if (cpha)
++ + reg_val |= SPI_CMD_CPHA;
++ + else
++ + reg_val &= ~SPI_CMD_CPHA;
++ + if (cpol)
++ + reg_val |= SPI_CMD_CPOL;
++ + else
++ + reg_val &= ~SPI_CMD_CPOL;
++ + writel(reg_val, mdata->base + SPI_CMD_REG);
++ +
++ + chip_config = spi->controller_data;
++ + if (!chip_config) {
++ + chip_config = (void *)&mtk_default_chip_info;
++ + spi->controller_data = chip_config;
++ + }
++ + mtk_spi_config(mdata, chip_config);
++ +
++ + return 0;
++ +}
++ +
++ +static void mtk_spi_set_cs(struct spi_device *spi, bool enable)
++ +{
++ + u32 reg_val;
++ + struct mtk_spi *mdata = spi_master_get_devdata(spi->master);
++ +
++ + reg_val = readl(mdata->base + SPI_CMD_REG);
- --- else
++++++ + if (!enable) {
++ + reg_val |= SPI_CMD_PAUSE_EN;
- --- writel(reg_val, mdata->base + SPI_CMD_REG);
++++++ + writel(reg_val, mdata->base + SPI_CMD_REG);
++++++ + } else {
++ + reg_val &= ~SPI_CMD_PAUSE_EN;
- --- master->prepare_transfer_hardware = mtk_spi_prepare_hardware;
++++++ + writel(reg_val, mdata->base + SPI_CMD_REG);
++++++ + mdata->state = MTK_SPI_IDLE;
++++++ + mtk_spi_reset(mdata);
++++++ + }
++ +}
++ +
++ +static void mtk_spi_prepare_transfer(struct spi_master *master,
++ + struct spi_transfer *xfer)
++ +{
++ + u32 spi_clk_hz, div, sck_time, cs_time, reg_val = 0;
++ + struct mtk_spi *mdata = spi_master_get_devdata(master);
++ +
++ + spi_clk_hz = clk_get_rate(mdata->spi_clk);
++ + if (xfer->speed_hz < spi_clk_hz / 2)
++ + div = DIV_ROUND_UP(spi_clk_hz, xfer->speed_hz);
++ + else
++ + div = 1;
++ +
++ + sck_time = (div + 1) / 2;
++ + cs_time = sck_time * 2;
++ +
++ + reg_val |= (((sck_time - 1) & 0xff) << SPI_CFG0_SCK_HIGH_OFFSET);
++ + reg_val |= (((sck_time - 1) & 0xff) << SPI_CFG0_SCK_LOW_OFFSET);
++ + reg_val |= (((cs_time - 1) & 0xff) << SPI_CFG0_CS_HOLD_OFFSET);
++ + reg_val |= (((cs_time - 1) & 0xff) << SPI_CFG0_CS_SETUP_OFFSET);
++ + writel(reg_val, mdata->base + SPI_CFG0_REG);
++ +
++ + reg_val = readl(mdata->base + SPI_CFG1_REG);
++ + reg_val &= ~SPI_CFG1_CS_IDLE_MASK;
++ + reg_val |= (((cs_time - 1) & 0xff) << SPI_CFG1_CS_IDLE_OFFSET);
++ + writel(reg_val, mdata->base + SPI_CFG1_REG);
++ +}
++ +
++ +static void mtk_spi_setup_packet(struct spi_master *master)
++ +{
++ + u32 packet_size, packet_loop, reg_val;
++ + struct mtk_spi *mdata = spi_master_get_devdata(master);
++ +
++ + packet_size = min_t(u32, mdata->xfer_len, MTK_SPI_PACKET_SIZE);
++ + packet_loop = mdata->xfer_len / packet_size;
++ +
++ + reg_val = readl(mdata->base + SPI_CFG1_REG);
++ + reg_val &= ~(SPI_CFG1_PACKET_LENGTH_MASK | SPI_CFG1_PACKET_LOOP_MASK);
++ + reg_val |= (packet_size - 1) << SPI_CFG1_PACKET_LENGTH_OFFSET;
++ + reg_val |= (packet_loop - 1) << SPI_CFG1_PACKET_LOOP_OFFSET;
++ + writel(reg_val, mdata->base + SPI_CFG1_REG);
++ +}
++ +
++ +static void mtk_spi_enable_transfer(struct spi_master *master)
++ +{
++ + u32 cmd;
++ + struct mtk_spi *mdata = spi_master_get_devdata(master);
++ +
++ + cmd = readl(mdata->base + SPI_CMD_REG);
++ + if (mdata->state == MTK_SPI_IDLE)
++ + cmd |= SPI_CMD_ACT;
++ + else
++ + cmd |= SPI_CMD_RESUME;
++ + writel(cmd, mdata->base + SPI_CMD_REG);
++ +}
++ +
++ +static int mtk_spi_get_mult_delta(u32 xfer_len)
++ +{
++ + u32 mult_delta;
++ +
++ + if (xfer_len > MTK_SPI_PACKET_SIZE)
++ + mult_delta = xfer_len % MTK_SPI_PACKET_SIZE;
++ + else
++ + mult_delta = 0;
++ +
++ + return mult_delta;
++ +}
++ +
++ +static void mtk_spi_update_mdata_len(struct spi_master *master)
++ +{
++ + int mult_delta;
++ + struct mtk_spi *mdata = spi_master_get_devdata(master);
++ +
++ + if (mdata->tx_sgl_len && mdata->rx_sgl_len) {
++ + if (mdata->tx_sgl_len > mdata->rx_sgl_len) {
++ + mult_delta = mtk_spi_get_mult_delta(mdata->rx_sgl_len);
++ + mdata->xfer_len = mdata->rx_sgl_len - mult_delta;
++ + mdata->rx_sgl_len = mult_delta;
++ + mdata->tx_sgl_len -= mdata->xfer_len;
++ + } else {
++ + mult_delta = mtk_spi_get_mult_delta(mdata->tx_sgl_len);
++ + mdata->xfer_len = mdata->tx_sgl_len - mult_delta;
++ + mdata->tx_sgl_len = mult_delta;
++ + mdata->rx_sgl_len -= mdata->xfer_len;
++ + }
++ + } else if (mdata->tx_sgl_len) {
++ + mult_delta = mtk_spi_get_mult_delta(mdata->tx_sgl_len);
++ + mdata->xfer_len = mdata->tx_sgl_len - mult_delta;
++ + mdata->tx_sgl_len = mult_delta;
++ + } else if (mdata->rx_sgl_len) {
++ + mult_delta = mtk_spi_get_mult_delta(mdata->rx_sgl_len);
++ + mdata->xfer_len = mdata->rx_sgl_len - mult_delta;
++ + mdata->rx_sgl_len = mult_delta;
++ + }
++ +}
++ +
++ +static void mtk_spi_setup_dma_addr(struct spi_master *master,
++ + struct spi_transfer *xfer)
++ +{
++ + struct mtk_spi *mdata = spi_master_get_devdata(master);
++ +
++ + if (mdata->tx_sgl)
++ + writel(xfer->tx_dma, mdata->base + SPI_TX_SRC_REG);
++ + if (mdata->rx_sgl)
++ + writel(xfer->rx_dma, mdata->base + SPI_RX_DST_REG);
++ +}
++ +
++ +static int mtk_spi_fifo_transfer(struct spi_master *master,
++ + struct spi_device *spi,
++ + struct spi_transfer *xfer)
++ +{
++ + int cnt;
++ + struct mtk_spi *mdata = spi_master_get_devdata(master);
++ +
++ + mdata->cur_transfer = xfer;
++ + mdata->xfer_len = xfer->len;
++ + mtk_spi_prepare_transfer(master, xfer);
++ + mtk_spi_setup_packet(master);
++ +
++ + if (xfer->len % 4)
++ + cnt = xfer->len / 4 + 1;
++ + else
++ + cnt = xfer->len / 4;
++ + iowrite32_rep(mdata->base + SPI_TX_DATA_REG, xfer->tx_buf, cnt);
++ +
++ + mtk_spi_enable_transfer(master);
++ +
++ + return 1;
++ +}
++ +
++ +static int mtk_spi_dma_transfer(struct spi_master *master,
++ + struct spi_device *spi,
++ + struct spi_transfer *xfer)
++ +{
++ + int cmd;
++ + struct mtk_spi *mdata = spi_master_get_devdata(master);
++ +
++ + mdata->tx_sgl = NULL;
++ + mdata->rx_sgl = NULL;
++ + mdata->tx_sgl_len = 0;
++ + mdata->rx_sgl_len = 0;
++ + mdata->cur_transfer = xfer;
++ +
++ + mtk_spi_prepare_transfer(master, xfer);
++ +
++ + cmd = readl(mdata->base + SPI_CMD_REG);
++ + if (xfer->tx_buf)
++ + cmd |= SPI_CMD_TX_DMA;
++ + if (xfer->rx_buf)
++ + cmd |= SPI_CMD_RX_DMA;
++ + writel(cmd, mdata->base + SPI_CMD_REG);
++ +
++ + if (xfer->tx_buf)
++ + mdata->tx_sgl = xfer->tx_sg.sgl;
++ + if (xfer->rx_buf)
++ + mdata->rx_sgl = xfer->rx_sg.sgl;
++ +
++ + if (mdata->tx_sgl) {
++ + xfer->tx_dma = sg_dma_address(mdata->tx_sgl);
++ + mdata->tx_sgl_len = sg_dma_len(mdata->tx_sgl);
++ + }
++ + if (mdata->rx_sgl) {
++ + xfer->rx_dma = sg_dma_address(mdata->rx_sgl);
++ + mdata->rx_sgl_len = sg_dma_len(mdata->rx_sgl);
++ + }
++ +
++ + mtk_spi_update_mdata_len(master);
++ + mtk_spi_setup_packet(master);
++ + mtk_spi_setup_dma_addr(master, xfer);
++ + mtk_spi_enable_transfer(master);
++ +
++ + return 1;
++ +}
++ +
++ +static int mtk_spi_transfer_one(struct spi_master *master,
++ + struct spi_device *spi,
++ + struct spi_transfer *xfer)
++ +{
++ + if (master->can_dma(master, spi, xfer))
++ + return mtk_spi_dma_transfer(master, spi, xfer);
++ + else
++ + return mtk_spi_fifo_transfer(master, spi, xfer);
++ +}
++ +
++ +static bool mtk_spi_can_dma(struct spi_master *master,
++ + struct spi_device *spi,
++ + struct spi_transfer *xfer)
++ +{
++ + return xfer->len > MTK_SPI_MAX_FIFO_SIZE;
++ +}
++ +
++ +static irqreturn_t mtk_spi_interrupt(int irq, void *dev_id)
++ +{
++ + u32 cmd, reg_val, cnt;
++ + struct spi_master *master = dev_id;
++ + struct mtk_spi *mdata = spi_master_get_devdata(master);
++ + struct spi_transfer *trans = mdata->cur_transfer;
++ +
++ + reg_val = readl(mdata->base + SPI_STATUS0_REG);
++ + if (reg_val & MTK_SPI_PAUSE_INT_STATUS)
++ + mdata->state = MTK_SPI_PAUSED;
++ + else
++ + mdata->state = MTK_SPI_IDLE;
++ +
++ + if (!master->can_dma(master, master->cur_msg->spi, trans)) {
++ + if (trans->rx_buf) {
++ + if (mdata->xfer_len % 4)
++ + cnt = mdata->xfer_len / 4 + 1;
++ + else
++ + cnt = mdata->xfer_len / 4;
++ + ioread32_rep(mdata->base + SPI_RX_DATA_REG,
++ + trans->rx_buf, cnt);
++ + }
++ + spi_finalize_current_transfer(master);
++ + return IRQ_HANDLED;
++ + }
++ +
++ + if (mdata->tx_sgl)
++ + trans->tx_dma += mdata->xfer_len;
++ + if (mdata->rx_sgl)
++ + trans->rx_dma += mdata->xfer_len;
++ +
++ + if (mdata->tx_sgl && (mdata->tx_sgl_len == 0)) {
++ + mdata->tx_sgl = sg_next(mdata->tx_sgl);
++ + if (mdata->tx_sgl) {
++ + trans->tx_dma = sg_dma_address(mdata->tx_sgl);
++ + mdata->tx_sgl_len = sg_dma_len(mdata->tx_sgl);
++ + }
++ + }
++ + if (mdata->rx_sgl && (mdata->rx_sgl_len == 0)) {
++ + mdata->rx_sgl = sg_next(mdata->rx_sgl);
++ + if (mdata->rx_sgl) {
++ + trans->rx_dma = sg_dma_address(mdata->rx_sgl);
++ + mdata->rx_sgl_len = sg_dma_len(mdata->rx_sgl);
++ + }
++ + }
++ +
++ + if (!mdata->tx_sgl && !mdata->rx_sgl) {
++ + /* spi disable dma */
++ + cmd = readl(mdata->base + SPI_CMD_REG);
++ + cmd &= ~SPI_CMD_TX_DMA;
++ + cmd &= ~SPI_CMD_RX_DMA;
++ + writel(cmd, mdata->base + SPI_CMD_REG);
++ +
++ + spi_finalize_current_transfer(master);
++ + return IRQ_HANDLED;
++ + }
++ +
++ + mtk_spi_update_mdata_len(master);
++ + mtk_spi_setup_packet(master);
++ + mtk_spi_setup_dma_addr(master, trans);
++ + mtk_spi_enable_transfer(master);
++ +
++ + return IRQ_HANDLED;
++ +}
++ +
++ +static int mtk_spi_probe(struct platform_device *pdev)
++ +{
++ + struct spi_master *master;
++ + struct mtk_spi *mdata;
++ + const struct of_device_id *of_id;
++ + struct resource *res;
++ + int irq, ret;
++ +
++ + master = spi_alloc_master(&pdev->dev, sizeof(*mdata));
++ + if (!master) {
++ + dev_err(&pdev->dev, "failed to alloc spi master\n");
++ + return -ENOMEM;
++ + }
++ +
++ + master->auto_runtime_pm = true;
++ + master->dev.of_node = pdev->dev.of_node;
++ + master->mode_bits = SPI_CPOL | SPI_CPHA;
++ +
++ + master->set_cs = mtk_spi_set_cs;
- - -- mdata->spi_clk = devm_clk_get(&pdev->dev, "spi-clk");
- - -- if (IS_ERR(mdata->spi_clk)) {
- - -- ret = PTR_ERR(mdata->spi_clk);
- - -- dev_err(&pdev->dev, "failed to get spi-clk: %d\n", ret);
- - -- goto err_put_master;
- - -- }
- - --
++ + master->prepare_message = mtk_spi_prepare_message;
++ + master->transfer_one = mtk_spi_transfer_one;
++ + master->can_dma = mtk_spi_can_dma;
++ +
++ + of_id = of_match_node(mtk_spi_of_match, pdev->dev.of_node);
++ + if (!of_id) {
++ + dev_err(&pdev->dev, "failed to probe of_node\n");
++ + ret = -EINVAL;
++ + goto err_put_master;
++ + }
++ +
++ + mdata = spi_master_get_devdata(master);
++ + mdata->dev_comp = of_id->data;
++ + if (mdata->dev_comp->must_tx)
++ + master->flags = SPI_MASTER_MUST_TX;
++ +
++ + if (mdata->dev_comp->need_pad_sel) {
++ + ret = of_property_read_u32(pdev->dev.of_node,
++ + "mediatek,pad-select",
++ + &mdata->pad_sel);
++ + if (ret) {
++ + dev_err(&pdev->dev, "failed to read pad select: %d\n",
++ + ret);
++ + goto err_put_master;
++ + }
++ +
++ + if (mdata->pad_sel > MT8173_SPI_MAX_PAD_SEL) {
++ + dev_err(&pdev->dev, "wrong pad-select: %u\n",
++ + mdata->pad_sel);
++ + ret = -EINVAL;
++ + goto err_put_master;
++ + }
++ + }
++ +
++ + platform_set_drvdata(pdev, master);
++ +
++ + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
++ + if (!res) {
++ + ret = -ENODEV;
++ + dev_err(&pdev->dev, "failed to determine base address\n");
++ + goto err_put_master;
++ + }
++ +
++ + mdata->base = devm_ioremap_resource(&pdev->dev, res);
++ + if (IS_ERR(mdata->base)) {
++ + ret = PTR_ERR(mdata->base);
++ + goto err_put_master;
++ + }
++ +
++ + irq = platform_get_irq(pdev, 0);
++ + if (irq < 0) {
++ + dev_err(&pdev->dev, "failed to get irq (%d)\n", irq);
++ + ret = irq;
++ + goto err_put_master;
++ + }
++ +
++ + if (!pdev->dev.dma_mask)
++ + pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
++ +
++ + ret = devm_request_irq(&pdev->dev, irq, mtk_spi_interrupt,
++ + IRQF_TRIGGER_NONE, dev_name(&pdev->dev), master);
++ + if (ret) {
++ + dev_err(&pdev->dev, "failed to register irq (%d)\n", ret);
++ + goto err_put_master;
++ + }
++ +
- - -- ret = clk_set_parent(mdata->spi_clk, mdata->parent_clk);
++ + mdata->parent_clk = devm_clk_get(&pdev->dev, "parent-clk");
++ + if (IS_ERR(mdata->parent_clk)) {
++ + ret = PTR_ERR(mdata->parent_clk);
++ + dev_err(&pdev->dev, "failed to get parent-clk: %d\n", ret);
++ + goto err_put_master;
++ + }
++ +
++++ +++ mdata->sel_clk = devm_clk_get(&pdev->dev, "sel-clk");
++++ +++ if (IS_ERR(mdata->sel_clk)) {
++++ +++ ret = PTR_ERR(mdata->sel_clk);
++++ +++ dev_err(&pdev->dev, "failed to get sel-clk: %d\n", ret);
++++ +++ goto err_put_master;
++++ +++ }
++++ +++
++++ +++ mdata->spi_clk = devm_clk_get(&pdev->dev, "spi-clk");
++++ +++ if (IS_ERR(mdata->spi_clk)) {
++++ +++ ret = PTR_ERR(mdata->spi_clk);
++++ +++ dev_err(&pdev->dev, "failed to get spi-clk: %d\n", ret);
++++ +++ goto err_put_master;
++++ +++ }
++++ +++
++ + ret = clk_prepare_enable(mdata->spi_clk);
++ + if (ret < 0) {
++ + dev_err(&pdev->dev, "failed to enable spi_clk (%d)\n", ret);
++ + goto err_put_master;
++ + }
++ +
- - -- clk_disable_unprepare(mdata->spi_clk);
++++ +++ ret = clk_set_parent(mdata->sel_clk, mdata->parent_clk);
++ + if (ret < 0) {
++ + dev_err(&pdev->dev, "failed to clk_set_parent (%d)\n", ret);
++ + goto err_disable_clk;
++ + }
++ +
++ + clk_disable_unprepare(mdata->spi_clk);
++ +
++ + pm_runtime_enable(&pdev->dev);
++ +
++ + ret = devm_spi_register_master(&pdev->dev, master);
++ + if (ret) {
++ + dev_err(&pdev->dev, "failed to register master (%d)\n", ret);
++ + goto err_put_master;
++ + }
++ +
++ + return 0;
++ +
++ +err_disable_clk:
++ + clk_disable_unprepare(mdata->spi_clk);
++ +err_put_master:
++ + spi_master_put(master);
++ +
++ + return ret;
++ +}
++ +
++ +static int mtk_spi_remove(struct platform_device *pdev)
++ +{
++ + struct spi_master *master = platform_get_drvdata(pdev);
++ + struct mtk_spi *mdata = spi_master_get_devdata(master);
++ +
++ + pm_runtime_disable(&pdev->dev);
++ +
++ + mtk_spi_reset(mdata);
++ + spi_master_put(master);
++ +
++ + return 0;
++ +}
++ +
++ +#ifdef CONFIG_PM_SLEEP
++ +static int mtk_spi_suspend(struct device *dev)
++ +{
++ + int ret;
++ + struct spi_master *master = dev_get_drvdata(dev);
++ + struct mtk_spi *mdata = spi_master_get_devdata(master);
++ +
++ + ret = spi_master_suspend(master);
++ + if (ret)
++ + return ret;
++ +
++ + if (!pm_runtime_suspended(dev))
++ + clk_disable_unprepare(mdata->spi_clk);
++ +
++ + return ret;
++ +}
++ +
++ +static int mtk_spi_resume(struct device *dev)
++ +{
++ + int ret;
++ + struct spi_master *master = dev_get_drvdata(dev);
++ + struct mtk_spi *mdata = spi_master_get_devdata(master);
++ +
++ + if (!pm_runtime_suspended(dev)) {
++ + ret = clk_prepare_enable(mdata->spi_clk);
++ + if (ret < 0) {
++ + dev_err(dev, "failed to enable spi_clk (%d)\n", ret);
++ + return ret;
++ + }
++ + }
++ +
++ + ret = spi_master_resume(master);
++ + if (ret < 0)
++ + clk_disable_unprepare(mdata->spi_clk);
++ +
++ + return ret;
++ +}
++ +#endif /* CONFIG_PM_SLEEP */
++ +
++ +#ifdef CONFIG_PM
++ +static int mtk_spi_runtime_suspend(struct device *dev)
++ +{
++ + struct spi_master *master = dev_get_drvdata(dev);
++ + struct mtk_spi *mdata = spi_master_get_devdata(master);
++ +
++ + clk_disable_unprepare(mdata->spi_clk);
++ +
++ + return 0;
++ +}
++ +
++ +static int mtk_spi_runtime_resume(struct device *dev)
++ +{
++ + struct spi_master *master = dev_get_drvdata(dev);
++ + struct mtk_spi *mdata = spi_master_get_devdata(master);
++ + int ret;
++ +
++ + ret = clk_prepare_enable(mdata->spi_clk);
++ + if (ret < 0) {
++ + dev_err(dev, "failed to enable spi_clk (%d)\n", ret);
++ + return ret;
++ + }
++ +
++ + return 0;
++ +}
++ +#endif /* CONFIG_PM */
++ +
++ +static const struct dev_pm_ops mtk_spi_pm = {
++ + SET_SYSTEM_SLEEP_PM_OPS(mtk_spi_suspend, mtk_spi_resume)
++ + SET_RUNTIME_PM_OPS(mtk_spi_runtime_suspend,
++ + mtk_spi_runtime_resume, NULL)
++ +};
++ +
++ +static struct platform_driver mtk_spi_driver = {
++ + .driver = {
++ + .name = "mtk-spi",
++ + .pm = &mtk_spi_pm,
++ + .of_match_table = mtk_spi_of_match,
++ + },
++ + .probe = mtk_spi_probe,
++ + .remove = mtk_spi_remove,
++ +};
++ +
++ +module_platform_driver(mtk_spi_driver);
++ +
++ +MODULE_DESCRIPTION("MTK SPI Controller driver");
++ +MODULE_AUTHOR("Leilk Liu <leilk.liu@mediatek.com>");
++ +MODULE_LICENSE("GPL v2");
++ +MODULE_ALIAS("platform:mtk-spi");
projects / GitHub / MotorolaMobilityLLC / kernel-slsi.git / commitdiff