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Date: Wed, 30 Jan 2019 18:19:14 +0100
From: Boris Brezillon <bbrezillon@...nel.org>
To: <Tudor.Ambarus@...rochip.com>
Cc: <broonie@...nel.org>, <Nicolas.Ferre@...rochip.com>,
<alexandre.belloni@...tlin.com>, <Ludovic.Desroches@...rochip.com>,
linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-spi@...r.kernel.org
Subject: Re: [PATCH 3/9] spi: atmel-quadspi: fix naming scheme
On Wed, 30 Jan 2019 15:08:33 +0000
<Tudor.Ambarus@...rochip.com> wrote:
> From: Tudor Ambarus <tudor.ambarus@...rochip.com>
>
> Let general names to core drivers.
>
> Signed-off-by: Tudor Ambarus <tudor.ambarus@...rochip.com>
> ---
> drivers/spi/atmel-quadspi.c | 52 ++++++++++++++++++++++-----------------------
> 1 file changed, 26 insertions(+), 26 deletions(-)
>
> diff --git a/drivers/spi/atmel-quadspi.c b/drivers/spi/atmel-quadspi.c
> index 64475ad16c83..e156c345705b 100644
> --- a/drivers/spi/atmel-quadspi.c
> +++ b/drivers/spi/atmel-quadspi.c
> @@ -157,14 +157,14 @@ struct atmel_qspi {
> struct completion cmd_completion;
> };
>
> -struct qspi_mode {
> +struct atmel_qspi_mode {
> u8 cmd_buswidth;
> u8 addr_buswidth;
> u8 data_buswidth;
> u32 config;
> };
>
> -static const struct qspi_mode sama5d2_qspi_modes[] = {
> +static const struct atmel_qspi_mode sama5d2_qspi_modes[] = {
> { 1, 1, 1, QSPI_IFR_WIDTH_SINGLE_BIT_SPI },
> { 1, 1, 2, QSPI_IFR_WIDTH_DUAL_OUTPUT },
> { 1, 1, 4, QSPI_IFR_WIDTH_QUAD_OUTPUT },
> @@ -175,18 +175,18 @@ static const struct qspi_mode sama5d2_qspi_modes[] = {
> };
>
> /* Register access functions */
> -static inline u32 qspi_readl(struct atmel_qspi *aq, u32 reg)
> +static inline u32 atmel_qspi_readl(struct atmel_qspi *aq, u32 reg)
> {
> return readl_relaxed(aq->regs + reg);
> }
>
> -static inline void qspi_writel(struct atmel_qspi *aq, u32 reg, u32 value)
> +static inline void atmel_qspi_writel(struct atmel_qspi *aq, u32 reg, u32 value)
> {
> writel_relaxed(value, aq->regs + reg);
> }
Can we get rid of these wrappers? I'm not a big fan of wrappers that
hide the fact that accesses are relaxed.
>
> -static inline bool is_compatible(const struct spi_mem_op *op,
> - const struct qspi_mode *mode)
> +static inline bool atmel_qspi_is_compatible(const struct spi_mem_op *op,
> + const struct atmel_qspi_mode *mode)
> {
> if (op->cmd.buswidth != mode->cmd_buswidth)
> return false;
> @@ -200,12 +200,12 @@ static inline bool is_compatible(const struct spi_mem_op *op,
> return true;
> }
>
> -static int find_mode(const struct spi_mem_op *op)
> +static int atmel_qspi_find_mode(const struct spi_mem_op *op)
> {
> u32 i;
>
> for (i = 0; i < ARRAY_SIZE(sama5d2_qspi_modes); i++)
> - if (is_compatible(op, &sama5d2_qspi_modes[i]))
> + if (atmel_qspi_is_compatible(op, &sama5d2_qspi_modes[i]))
> return i;
>
> return -1;
> @@ -214,7 +214,7 @@ static int find_mode(const struct spi_mem_op *op)
> static bool atmel_qspi_supports_op(struct spi_mem *mem,
> const struct spi_mem_op *op)
> {
> - if (find_mode(op) < 0)
> + if (atmel_qspi_find_mode(op) < 0)
> return false;
>
> /* special case not supported by hardware */
> @@ -237,7 +237,7 @@ static int atmel_qspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
> icr = QSPI_ICR_INST(op->cmd.opcode);
> ifr = QSPI_IFR_INSTEN;
>
> - mode = find_mode(op);
> + mode = atmel_qspi_find_mode(op);
> if (mode < 0)
> return -ENOTSUPP;
>
> @@ -293,17 +293,17 @@ static int atmel_qspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
> ifr |= QSPI_IFR_TFRTYP_TRSFR_WRITE;
>
> /* Clear pending interrupts */
> - (void)qspi_readl(aq, QSPI_SR);
> + (void)atmel_qspi_readl(aq, QSPI_SR);
>
> /* Set QSPI Instruction Frame registers */
> - qspi_writel(aq, QSPI_IAR, iar);
> - qspi_writel(aq, QSPI_ICR, icr);
> - qspi_writel(aq, QSPI_IFR, ifr);
> + atmel_qspi_writel(aq, QSPI_IAR, iar);
> + atmel_qspi_writel(aq, QSPI_ICR, icr);
> + atmel_qspi_writel(aq, QSPI_IFR, ifr);
>
> /* Skip to the final steps if there is no data */
> if (op->data.nbytes) {
> /* Dummy read of QSPI_IFR to synchronize APB and AHB accesses */
> - (void)qspi_readl(aq, QSPI_IFR);
> + (void)atmel_qspi_readl(aq, QSPI_IFR);
>
> /* Send/Receive data */
> if (op->data.dir == SPI_MEM_DATA_IN)
> @@ -314,22 +314,22 @@ static int atmel_qspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
> op->data.buf.out, op->data.nbytes);
>
> /* Release the chip-select */
> - qspi_writel(aq, QSPI_CR, QSPI_CR_LASTXFER);
> + atmel_qspi_writel(aq, QSPI_CR, QSPI_CR_LASTXFER);
> }
>
> /* Poll INSTRuction End status */
> - sr = qspi_readl(aq, QSPI_SR);
> + sr = atmel_qspi_readl(aq, QSPI_SR);
> if ((sr & QSPI_SR_CMD_COMPLETED) == QSPI_SR_CMD_COMPLETED)
> return err;
>
> /* Wait for INSTRuction End interrupt */
> reinit_completion(&aq->cmd_completion);
> aq->pending = sr & QSPI_SR_CMD_COMPLETED;
> - qspi_writel(aq, QSPI_IER, QSPI_SR_CMD_COMPLETED);
> + atmel_qspi_writel(aq, QSPI_IER, QSPI_SR_CMD_COMPLETED);
> if (!wait_for_completion_timeout(&aq->cmd_completion,
> msecs_to_jiffies(1000)))
> err = -ETIMEDOUT;
> - qspi_writel(aq, QSPI_IDR, QSPI_SR_CMD_COMPLETED);
> + atmel_qspi_writel(aq, QSPI_IDR, QSPI_SR_CMD_COMPLETED);
>
> return err;
> }
> @@ -368,7 +368,7 @@ static int atmel_qspi_setup(struct spi_device *spi)
> scbr--;
>
> scr = QSPI_SCR_SCBR(scbr);
> - qspi_writel(aq, QSPI_SCR, scr);
> + atmel_qspi_writel(aq, QSPI_SCR, scr);
>
> return 0;
> }
> @@ -376,13 +376,13 @@ static int atmel_qspi_setup(struct spi_device *spi)
> static int atmel_qspi_init(struct atmel_qspi *aq)
> {
> /* Reset the QSPI controller */
> - qspi_writel(aq, QSPI_CR, QSPI_CR_SWRST);
> + atmel_qspi_writel(aq, QSPI_CR, QSPI_CR_SWRST);
>
> /* Set the QSPI controller in Serial Memory Mode */
> - qspi_writel(aq, QSPI_MR, QSPI_MR_SMM);
> + atmel_qspi_writel(aq, QSPI_MR, QSPI_MR_SMM);
>
> /* Enable the QSPI controller */
> - qspi_writel(aq, QSPI_CR, QSPI_CR_QSPIEN);
> + atmel_qspi_writel(aq, QSPI_CR, QSPI_CR_QSPIEN);
>
> return 0;
> }
> @@ -392,8 +392,8 @@ static irqreturn_t atmel_qspi_interrupt(int irq, void *dev_id)
> struct atmel_qspi *aq = (struct atmel_qspi *)dev_id;
> u32 status, mask, pending;
>
> - status = qspi_readl(aq, QSPI_SR);
> - mask = qspi_readl(aq, QSPI_IMR);
> + status = atmel_qspi_readl(aq, QSPI_SR);
> + mask = atmel_qspi_readl(aq, QSPI_IMR);
> pending = status & mask;
>
> if (!pending)
> @@ -499,7 +499,7 @@ static int atmel_qspi_remove(struct platform_device *pdev)
> struct atmel_qspi *aq = spi_controller_get_devdata(ctrl);
>
> spi_unregister_controller(ctrl);
> - qspi_writel(aq, QSPI_CR, QSPI_CR_QSPIDIS);
> + atmel_qspi_writel(aq, QSPI_CR, QSPI_CR_QSPIDIS);
> clk_disable_unprepare(aq->clk);
> return 0;
> }
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