lkml.org 
[lkml]   [2013]   [Jan]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 8/8] MFD:rtsx: Use macro defines to replace some variables
Date
From: Wei WANG <wei_wang@realsil.com.cn>

In function rtsx_pci_switch_clock, some variables, such as min_n, max_n,
and max_div, are not necessary. And those assigned values look very
obscure for others. It's more proper to use macro definitions here to
replace these variables.

Signed-off-by: Wei WANG <wei_wang@realsil.com.cn>
Acked-by: Borislav Petkov <bp@alien8.de>
---
drivers/mfd/rtsx_pcr.c | 13 ++++---------
drivers/mfd/rtsx_pcr.h | 3 +++
2 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/mfd/rtsx_pcr.c b/drivers/mfd/rtsx_pcr.c
index 69e8a1e..ccdb026 100644
--- a/drivers/mfd/rtsx_pcr.c
+++ b/drivers/mfd/rtsx_pcr.c
@@ -590,8 +590,7 @@ int rtsx_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
u8 ssc_depth, bool initial_mode, bool double_clk, bool vpclk)
{
int err, clk;
- u8 n, min_n, max_n, clk_divider;
- u8 mcu_cnt, div, max_div;
+ u8 n, clk_divider, mcu_cnt, div;
u8 depth[] = {
[RTSX_SSC_DEPTH_4M] = SSC_DEPTH_4M,
[RTSX_SSC_DEPTH_2M] = SSC_DEPTH_2M,
@@ -615,10 +614,6 @@ int rtsx_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
card_clock /= 1000000;
dev_dbg(&(pcr->pci->dev), "Switch card clock to %dMHz\n", card_clock);

- min_n = 80;
- max_n = 208;
- max_div = CLK_DIV_8;
-
clk = card_clock;
if (!initial_mode && double_clk)
clk = card_clock * 2;
@@ -633,16 +628,16 @@ int rtsx_pci_switch_clock(struct rtsx_pcr *pcr, unsigned int card_clock,
n = (u8)pcr->ops->conv_clk_and_div_n(clk, CLK_TO_DIV_N);
else
n = (u8)(clk - 2);
- if ((clk <= 2) || (n > max_n))
+ if ((clk <= 2) || (n > MAX_DIV_N_PCR))
return -EINVAL;

mcu_cnt = (u8)(125/clk + 3);
if (mcu_cnt > 15)
mcu_cnt = 15;

- /* Make sure that the SSC clock div_n is equal or greater than min_n */
+ /* Make sure that the SSC clock div_n is not less than MIN_DIV_N_PCR */
div = CLK_DIV_1;
- while ((n < min_n) && (div < max_div)) {
+ while ((n < MIN_DIV_N_PCR) && (div < CLK_DIV_8)) {
if (pcr->ops->conv_clk_and_div_n) {
int dbl_clk = pcr->ops->conv_clk_and_div_n(n,
DIV_N_TO_CLK) * 2;
diff --git a/drivers/mfd/rtsx_pcr.h b/drivers/mfd/rtsx_pcr.h
index 12462c1..33c210b 100644
--- a/drivers/mfd/rtsx_pcr.h
+++ b/drivers/mfd/rtsx_pcr.h
@@ -25,6 +25,9 @@

#include <linux/mfd/rtsx_pci.h>

+#define MIN_DIV_N_PCR 80
+#define MAX_DIV_N_PCR 208
+
void rts5209_init_params(struct rtsx_pcr *pcr);
void rts5229_init_params(struct rtsx_pcr *pcr);
void rtl8411_init_params(struct rtsx_pcr *pcr);
--
1.7.9.5


\
 
 \ /
  Last update: 2013-01-08 11:41    [W:0.086 / U:0.424 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site