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Message-Id: <20200724074038.5597-22-krzk@kernel.org>
Date: Fri, 24 Jul 2020 09:40:30 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
Markus Mayer <mmayer@...adcom.com>,
bcm-kernel-feedback-list@...adcom.com,
Florian Fainelli <f.fainelli@...il.com>,
Santosh Shilimkar <ssantosh@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Roger Quadros <rogerq@...com>,
Tony Lindgren <tony@...mide.com>,
Vladimir Zapolskiy <vz@...ia.com>,
Kukjin Kim <kgene@...nel.org>,
Thierry Reding <thierry.reding@...il.com>,
Jonathan Hunter <jonathanh@...dia.com>,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-mediatek@...ts.infradead.org, linux-omap@...r.kernel.org,
linux-samsung-soc@...r.kernel.org, linux-tegra@...r.kernel.org
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
Krzysztof Kozlowski <krzk@...nel.org>
Subject: [RFT v2 21/29] memory: omap-gpmc: Remove GPMC_SET_ONE_CD_MAX macro for safety
The GPMC_SET_ONE_CD_MAX macro uses return statement and variable 'cs'
coming from called scope. This is not a good practice. Also
checkpatch complained:
WARNING: Macros with flow control statements should be avoided
ERROR: Macros starting with if should be enclosed by a do - while
loop to avoid possible if/else logic defects
Since GPMC_SET_ONE_CD_MAX macro just calls one function, it can be open
coded. The difference with original code is that function will exit on
error not after every register set, but after a group of sets.
Signed-off-by: Krzysztof Kozlowski <krzk@...nel.org>
---
Not tested
Changes since v1:
1. Drop the macro, after comments from Arnd.
---
drivers/memory/omap-gpmc.c | 137 +++++++++++++++++++++++++------------
1 file changed, 93 insertions(+), 44 deletions(-)
diff --git a/drivers/memory/omap-gpmc.c b/drivers/memory/omap-gpmc.c
index 1e370142dfca..2a2d0297e071 100644
--- a/drivers/memory/omap-gpmc.c
+++ b/drivers/memory/omap-gpmc.c
@@ -635,14 +635,6 @@ static int set_gpmc_timing_reg(int cs, int reg, int st_bit, int end_bit, int max
return 0;
}
-#define GPMC_SET_ONE_CD_MAX(reg, st, end, max, field, cd) \
- if (set_gpmc_timing_reg(cs, (reg), (st), (end), (max), \
- t->field, (cd), #field) < 0) \
- return -ENXIO
-
-#define GPMC_SET_ONE(reg, st, end, field) \
- GPMC_SET_ONE_CD_MAX(reg, st, end, 0, field, GPMC_CD_FCLK)
-
/**
* gpmc_calc_waitmonitoring_divider - calculate proper GPMCFCLKDIVIDER based on WAITMONITORINGTIME
* WAITMONITORINGTIME will be _at least_ as long as desired, i.e.
@@ -703,7 +695,7 @@ int gpmc_calc_divider(unsigned int sync_clk)
int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t,
const struct gpmc_settings *s)
{
- int div;
+ int div, ret;
u32 l;
div = gpmc_calc_divider(t->sync_clk);
@@ -737,53 +729,110 @@ int gpmc_cs_set_timings(int cs, const struct gpmc_timings *t,
}
}
- GPMC_SET_ONE(GPMC_CS_CONFIG2, 0, 3, cs_on);
- GPMC_SET_ONE(GPMC_CS_CONFIG2, 8, 12, cs_rd_off);
- GPMC_SET_ONE(GPMC_CS_CONFIG2, 16, 20, cs_wr_off);
+ ret = 0;
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG2, 0, 3, 0, t->cs_on,
+ GPMC_CD_FCLK, "cs_on");
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG2, 8, 12, 0, t->cs_rd_off,
+ GPMC_CD_FCLK, "cs_rd_off");
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG2, 16, 20, 0, t->cs_wr_off,
+ GPMC_CD_FCLK, "cs_wr_off");
+ if (ret)
+ return -ENXIO;
+
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG3, 0, 3, 0, t->adv_on,
+ GPMC_CD_FCLK, "adv_on");
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG3, 8, 12, 0, t->adv_rd_off,
+ GPMC_CD_FCLK, "adv_rd_off");
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG3, 16, 20, 0, t->adv_wr_off,
+ GPMC_CD_FCLK, "adv_wr_off");
+ if (ret)
+ return -ENXIO;
- GPMC_SET_ONE(GPMC_CS_CONFIG3, 0, 3, adv_on);
- GPMC_SET_ONE(GPMC_CS_CONFIG3, 8, 12, adv_rd_off);
- GPMC_SET_ONE(GPMC_CS_CONFIG3, 16, 20, adv_wr_off);
if (gpmc_capability & GPMC_HAS_MUX_AAD) {
- GPMC_SET_ONE(GPMC_CS_CONFIG3, 4, 6, adv_aad_mux_on);
- GPMC_SET_ONE(GPMC_CS_CONFIG3, 24, 26, adv_aad_mux_rd_off);
- GPMC_SET_ONE(GPMC_CS_CONFIG3, 28, 30, adv_aad_mux_wr_off);
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG3, 4, 6, 0,
+ t->adv_aad_mux_on, GPMC_CD_FCLK,
+ "adv_aad_mux_on");
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG3, 24, 26, 0,
+ t->adv_aad_mux_rd_off, GPMC_CD_FCLK,
+ "adv_aad_mux_rd_off");
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG3, 28, 30, 0,
+ t->adv_aad_mux_wr_off, GPMC_CD_FCLK,
+ "adv_aad_mux_wr_off");
+ if (ret)
+ return -ENXIO;
}
- GPMC_SET_ONE(GPMC_CS_CONFIG4, 0, 3, oe_on);
- GPMC_SET_ONE(GPMC_CS_CONFIG4, 8, 12, oe_off);
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG4, 0, 3, 0, t->oe_on,
+ GPMC_CD_FCLK, "oe_on");
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG4, 8, 12, 0, t->oe_off,
+ GPMC_CD_FCLK, "oe_off");
if (gpmc_capability & GPMC_HAS_MUX_AAD) {
- GPMC_SET_ONE(GPMC_CS_CONFIG4, 4, 6, oe_aad_mux_on);
- GPMC_SET_ONE(GPMC_CS_CONFIG4, 13, 15, oe_aad_mux_off);
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG4, 4, 6, 0,
+ t->oe_aad_mux_on, GPMC_CD_FCLK,
+ "oe_aad_mux_on");
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG4, 13, 15, 0,
+ t->oe_aad_mux_off, GPMC_CD_FCLK,
+ "oe_aad_mux_off");
+ }
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG4, 16, 19, 0, t->we_on,
+ GPMC_CD_FCLK, "we_on");
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG4, 24, 28, 0, t->we_off,
+ GPMC_CD_FCLK, "we_off");
+ if (ret)
+ return -ENXIO;
+
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG5, 0, 4, 0, t->rd_cycle,
+ GPMC_CD_FCLK, "rd_cycle");
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG5, 8, 12, 0, t->wr_cycle,
+ GPMC_CD_FCLK, "wr_cycle");
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG5, 16, 20, 0, t->access,
+ GPMC_CD_FCLK, "access");
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG5, 24, 27, 0,
+ t->page_burst_access, GPMC_CD_FCLK,
+ "page_burst_access");
+ if (ret)
+ return -ENXIO;
+
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG6, 0, 3, 0,
+ t->bus_turnaround, GPMC_CD_FCLK,
+ "bus_turnaround");
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG6, 8, 11, 0,
+ t->cycle2cycle_delay, GPMC_CD_FCLK,
+ "cycle2cycle_delay");
+ if (ret)
+ return -ENXIO;
+
+ if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS) {
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG6, 16, 19, 0,
+ t->wr_data_mux_bus, GPMC_CD_FCLK,
+ "wr_data_mux_bus");
+ if (ret)
+ return -ENXIO;
+ }
+ if (gpmc_capability & GPMC_HAS_WR_ACCESS) {
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG6, 24, 28, 0,
+ t->wr_access, GPMC_CD_FCLK,
+ "wr_access");
+ if (ret)
+ return -ENXIO;
}
- GPMC_SET_ONE(GPMC_CS_CONFIG4, 16, 19, we_on);
- GPMC_SET_ONE(GPMC_CS_CONFIG4, 24, 28, we_off);
-
- GPMC_SET_ONE(GPMC_CS_CONFIG5, 0, 4, rd_cycle);
- GPMC_SET_ONE(GPMC_CS_CONFIG5, 8, 12, wr_cycle);
- GPMC_SET_ONE(GPMC_CS_CONFIG5, 16, 20, access);
-
- GPMC_SET_ONE(GPMC_CS_CONFIG5, 24, 27, page_burst_access);
-
- GPMC_SET_ONE(GPMC_CS_CONFIG6, 0, 3, bus_turnaround);
- GPMC_SET_ONE(GPMC_CS_CONFIG6, 8, 11, cycle2cycle_delay);
-
- if (gpmc_capability & GPMC_HAS_WR_DATA_MUX_BUS)
- GPMC_SET_ONE(GPMC_CS_CONFIG6, 16, 19, wr_data_mux_bus);
- if (gpmc_capability & GPMC_HAS_WR_ACCESS)
- GPMC_SET_ONE(GPMC_CS_CONFIG6, 24, 28, wr_access);
l = gpmc_cs_read_reg(cs, GPMC_CS_CONFIG1);
l &= ~0x03;
l |= (div - 1);
gpmc_cs_write_reg(cs, GPMC_CS_CONFIG1, l);
- GPMC_SET_ONE_CD_MAX(GPMC_CS_CONFIG1, 18, 19,
- GPMC_CONFIG1_WAITMONITORINGTIME_MAX,
- wait_monitoring, GPMC_CD_CLK);
- GPMC_SET_ONE_CD_MAX(GPMC_CS_CONFIG1, 25, 26,
- GPMC_CONFIG1_CLKACTIVATIONTIME_MAX,
- clk_activation, GPMC_CD_FCLK);
+ ret = 0;
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG1, 18, 19,
+ GPMC_CONFIG1_WAITMONITORINGTIME_MAX,
+ t->wait_monitoring, GPMC_CD_CLK,
+ "wait_monitoring");
+ ret |= set_gpmc_timing_reg(cs, GPMC_CS_CONFIG1, 25, 26,
+ GPMC_CONFIG1_CLKACTIVATIONTIME_MAX,
+ t->clk_activation, GPMC_CD_FCLK,
+ "clk_activation");
+ if (ret)
+ return -ENXIO;
#ifdef CONFIG_OMAP_GPMC_DEBUG
pr_info("GPMC CS%d CLK period is %lu ns (div %d)\n",
--
2.17.1
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