| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20190204100910.26701-4-tudor.ambarus@microchip.com>
Date: Mon, 4 Feb 2019 10:09:28 +0000
From: <Tudor.Ambarus@...rochip.com>
To: <broonie@...nel.org>, <robh+dt@...nel.org>, <mark.rutland@....com>,
<Nicolas.Ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
<Ludovic.Desroches@...rochip.com>, <bbrezillon@...nel.org>,
<Cyrille.Pitchen@...rochip.com>, <bugalski.piotr@...il.com>
CC: <linux-spi@...r.kernel.org>, <devicetree@...r.kernel.org>,
<linux-arm-kernel@...ts.infradead.org>,
<linux-kernel@...r.kernel.org>, <linux-mtd@...ts.infradead.org>,
<Tudor.Ambarus@...rochip.com>
Subject: [PATCH v4 03/13] spi: atmel-quadspi: drop wrappers for iomem accesses
From: Tudor Ambarus <tudor.ambarus@...rochip.com>
The wrappers hid that the accesses are relaxed. Drop them.
Suggested-by: Boris Brezillon <bbrezillon@...nel.org>
Signed-off-by: Tudor Ambarus <tudor.ambarus@...rochip.com>
Reviewed-by: Boris Brezillon <bbrezillon@...nel.org>
---
v4:
- drop local variable that kept aq->regs, the compiler should be
smart enough to store it in a register
- collect R-b
v3: no change
v2: new patch
drivers/spi/atmel-quadspi.c | 45 +++++++++++++++++----------------------------
1 file changed, 17 insertions(+), 28 deletions(-)
diff --git a/drivers/spi/atmel-quadspi.c b/drivers/spi/atmel-quadspi.c
index 7d83ce8747e8..c745e75b755e 100644
--- a/drivers/spi/atmel-quadspi.c
+++ b/drivers/spi/atmel-quadspi.c
@@ -175,17 +175,6 @@ static const struct qspi_mode sama5d2_qspi_modes[] = {
{ 4, 4, 4, QSPI_IFR_WIDTH_QUAD_CMD },
};
-/* Register access functions */
-static inline u32 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)
-{
- writel_relaxed(value, aq->regs + reg);
-}
-
static inline bool is_compatible(const struct spi_mem_op *op,
const struct qspi_mode *mode)
{
@@ -243,7 +232,7 @@ static int atmel_qspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
* Serial Memory Mode (SMM).
*/
if (aq->mr != QSPI_MR_SMM) {
- qspi_writel(aq, QSPI_MR, QSPI_MR_SMM);
+ writel_relaxed(QSPI_MR_SMM, aq->regs + QSPI_MR);
aq->mr = QSPI_MR_SMM;
}
@@ -303,17 +292,17 @@ 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)readl_relaxed(aq->regs + 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);
+ writel_relaxed(iar, aq->regs + QSPI_IAR);
+ writel_relaxed(icr, aq->regs + QSPI_ICR);
+ writel_relaxed(ifr, aq->regs + QSPI_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)readl_relaxed(aq->regs + QSPI_IFR);
/* Send/Receive data */
if (op->data.dir == SPI_MEM_DATA_IN)
@@ -324,22 +313,22 @@ 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);
+ writel_relaxed(QSPI_CR_LASTXFER, aq->regs + QSPI_CR);
}
/* Poll INSTRuction End status */
- sr = qspi_readl(aq, QSPI_SR);
+ sr = readl_relaxed(aq->regs + 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);
+ writel_relaxed(QSPI_SR_CMD_COMPLETED, aq->regs + QSPI_IER);
if (!wait_for_completion_timeout(&aq->cmd_completion,
msecs_to_jiffies(1000)))
err = -ETIMEDOUT;
- qspi_writel(aq, QSPI_IDR, QSPI_SR_CMD_COMPLETED);
+ writel_relaxed(QSPI_SR_CMD_COMPLETED, aq->regs + QSPI_IDR);
return err;
}
@@ -378,7 +367,7 @@ static int atmel_qspi_setup(struct spi_device *spi)
scbr--;
scr = QSPI_SCR_SCBR(scbr);
- qspi_writel(aq, QSPI_SCR, scr);
+ writel_relaxed(scr, aq->regs + QSPI_SCR);
return 0;
}
@@ -386,14 +375,14 @@ 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);
+ writel_relaxed(QSPI_CR_SWRST, aq->regs + QSPI_CR);
/* Set the QSPI controller by default in Serial Memory Mode */
- qspi_writel(aq, QSPI_MR, QSPI_MR_SMM);
+ writel_relaxed(QSPI_MR_SMM, aq->regs + QSPI_MR);
aq->mr = QSPI_MR_SMM;
/* Enable the QSPI controller */
- qspi_writel(aq, QSPI_CR, QSPI_CR_QSPIEN);
+ writel_relaxed(QSPI_CR_QSPIEN, aq->regs + QSPI_CR);
return 0;
}
@@ -403,8 +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 = readl_relaxed(aq->regs + QSPI_SR);
+ mask = readl_relaxed(aq->regs + QSPI_IMR);
pending = status & mask;
if (!pending)
@@ -510,7 +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);
+ writel_relaxed(QSPI_CR_QSPIDIS, aq->regs + QSPI_CR);
clk_disable_unprepare(aq->clk);
return 0;
}
--
2.9.5
Powered by blists - more mailing lists