[PATCH] spmi: pmic-arb: Don't byte swap when reading/writing FIFO
From: Stephen Boyd <hidden>
Date: 2015-08-28 19:21:46
Also in:
linux-arm-msm, lkml
Subsystem:
spmi subsystem, the rest · Maintainers:
Stephen Boyd, Linus Torvalds
We don't want to swap bytes that we're reading and writing to the FIFOs when we're running on a big-endian CPU. Doing so causes problems like where the qcom-spmi-iadc driver can't detect the type of device because the bytes are all mixed up. Use the raw IO accessors for these API instead, and collapse pmic_arb_base_read() into the byte reading API so that we aren't tempted to read non-FIFO data like commands with that function. Cc: Andy Gross <redacted> Cc: Bjorn Andersson <redacted> Signed-off-by: Stephen Boyd <redacted> --- drivers/spmi/spmi-pmic-arb.c | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-)
diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c
index bdfb3c84c3cb..5e834bd23c09 100644
--- a/drivers/spmi/spmi-pmic-arb.c
+++ b/drivers/spmi/spmi-pmic-arb.c@@ -168,11 +168,6 @@ struct pmic_arb_ver_ops { u32 (*irq_clear)(u8 n); }; -static inline u32 pmic_arb_base_read(struct spmi_pmic_arb_dev *dev, u32 offset) -{ - return readl_relaxed(dev->rd_base + offset); -} - static inline void pmic_arb_base_write(struct spmi_pmic_arb_dev *dev, u32 offset, u32 val) {
@@ -193,7 +188,7 @@ static inline void pmic_arb_set_rd_cmd(struct spmi_pmic_arb_dev *dev, */ static void pa_read_data(struct spmi_pmic_arb_dev *dev, u8 *buf, u32 reg, u8 bc) { - u32 data = pmic_arb_base_read(dev, reg); + u32 data = __raw_readl(dev->rd_base + reg); memcpy(buf, &data, (bc & 3) + 1); }
@@ -208,7 +203,7 @@ pa_write_data(struct spmi_pmic_arb_dev *dev, const u8 *buf, u32 reg, u8 bc) { u32 data = 0; memcpy(&data, buf, (bc & 3) + 1); - pmic_arb_base_write(dev, reg, data); + __raw_writel(data, dev->wr_base + reg); } static int pmic_arb_wait_for_done(struct spmi_controller *ctrl,
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