From: Mark Brown Date: Tue, 22 Sep 2015 16:48:34 +0000 (-0700) Subject: Merge remote-tracking branches 'spi/fix/atmel', 'spi/fix/bcm2835', 'spi/fix/doc'... X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5132361cd97ed21863fb48bb8e4a0e6203a4269a;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git Merge remote-tracking branches 'spi/fix/atmel', 'spi/fix/bcm2835', 'spi/fix/doc', 'spi/fix/mediatek', 'spi/fix/meson', 'spi/fix/mtk' and 'spi/fix/pxa2xx' into spi-linus --- 5132361cd97ed21863fb48bb8e4a0e6203a4269a diff --cc drivers/spi/spi-mt65xx.c index 5f6315c47920,000000000000,000000000000,5f6315c47920,e9839a4e0175,5f6315c47920,b6073bbff8d9,000000000000..ecb6c58238c4 mode 100644,000000,000000,100644,100644,100644,100644,000000..100644 --- a/drivers/spi/spi-mt65xx.c +++ b/drivers/spi/spi-mt65xx.c @@@@@@@@@ -1,726 -1,0 -1,0 -1,726 -1,732 -1,726 -1,713 -1,0 +1,719 @@@@@@@@@ ++ +/* ++ + * Copyright (c) 2015 MediaTek Inc. ++ + * Author: Leilk Liu ++ + * ++ + * 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 ++ +#include ++ +#include ++ +#include ++ +#include ++ +#include ++ +#include ++ +#include ++ +#include ++ +#include ++ +#include ++ +#include ++ + ++ +#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; - - -- struct clk *spi_clk, *parent_clk; ++++ +++ 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); ++ +} ++ + - --- 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; - --- } - --- ++ +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); - --- if (!enable) ++++++ + if (!enable) { ++ + reg_val |= SPI_CMD_PAUSE_EN; - --- else ++++++ + writel(reg_val, mdata->base + SPI_CMD_REG); ++++++ + } else { ++ + reg_val &= ~SPI_CMD_PAUSE_EN; - --- writel(reg_val, mdata->base + SPI_CMD_REG); ++++++ + 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; - --- master->prepare_transfer_hardware = mtk_spi_prepare_hardware; ++ + 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; ++ + } ++ + - - -- 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; - - -- } - - -- ++ + 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; ++ + } ++ + - - -- ret = clk_set_parent(mdata->spi_clk, mdata->parent_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); - - -- clk_disable_unprepare(mdata->spi_clk); ++ + 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 "); ++ +MODULE_LICENSE("GPL v2"); ++ +MODULE_ALIAS("platform:mtk-spi");