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soc: fsl: qe: replace spin_event_timeout by readx_poll_timeout_atomic

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In preparation for allowing QE to be built for architectures other
than ppc, use the generic readx_poll_timeout_atomic() helper from
iopoll.h rather than the ppc-only spin_event_timeout().

Reviewed-by: Timur Tabi <timur@kernel.org>
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Li Yang <leoyang.li@nxp.com>
This commit is contained in:
Rasmus Villemoes 2019-11-28 15:55:11 +01:00 committed by Li Yang
parent 77d7676a92
commit 5809968538
1 changed files with 7 additions and 6 deletions
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13
drivers/soc/fsl/qe/qe.c
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@ -22,6 +22,7 @@
#include <linux/module.h> #include <linux/module.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/ioport.h> #include <linux/ioport.h>
#include <linux/iopoll.h>
#include <linux/crc32.h> #include <linux/crc32.h>
#include <linux/mod_devicetable.h> #include <linux/mod_devicetable.h>
#include <linux/of_platform.h> #include <linux/of_platform.h>
@ -108,7 +109,8 @@ int qe_issue_cmd(u32 cmd, u32 device, u8 mcn_protocol, u32 cmd_input)
{ {
unsigned long flags; unsigned long flags;
u8 mcn_shift = 0, dev_shift = 0; u8 mcn_shift = 0, dev_shift = 0;
u32 ret; u32 val;
int ret;
spin_lock_irqsave(&qe_lock, flags); spin_lock_irqsave(&qe_lock, flags);
if (cmd == QE_RESET) { if (cmd == QE_RESET) {
@ -135,13 +137,12 @@ int qe_issue_cmd(u32 cmd, u32 device, u8 mcn_protocol, u32 cmd_input)
} }
/* wait for the QE_CR_FLG to clear */ /* wait for the QE_CR_FLG to clear */
ret = spin_event_timeout((qe_ioread32be(&qe_immr->cp.cecr) & QE_CR_FLG) == 0, ret = readx_poll_timeout_atomic(qe_ioread32be, &qe_immr->cp.cecr, val,
100, 0); (val & QE_CR_FLG) == 0, 0, 100);
/* On timeout (e.g. failure), the expression will be false (ret == 0), /* On timeout, ret is -ETIMEDOUT, otherwise it will be 0. */
otherwise it will be true (ret == 1). */
spin_unlock_irqrestore(&qe_lock, flags); spin_unlock_irqrestore(&qe_lock, flags);
return ret == 1; return ret == 0;
} }
EXPORT_SYMBOL(qe_issue_cmd); EXPORT_SYMBOL(qe_issue_cmd);