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List: linux-sh
Subject: [PATCH 04/13] pinctrl: sh-pfc: checker: Add check for config register conflicts
From: Geert Uytterhoeven <geert+renesas () glider ! be>
Date: 2020-01-10 13:19:18
Message-ID: 20200110131927.1029-5-geert+renesas () glider ! be
[Download RAW message or body]
Add a helper to verify that register addresses are unique, and use it to
validate config register descriptors.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
drivers/pinctrl/sh-pfc/core.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/drivers/pinctrl/sh-pfc/core.c b/drivers/pinctrl/sh-pfc/core.c
index fe11841e8ce81dbb..2edf6efe8dfe3fdf 100644
--- a/drivers/pinctrl/sh-pfc/core.c
+++ b/drivers/pinctrl/sh-pfc/core.c
@@ -726,8 +726,12 @@ static int sh_pfc_suspend_init(struct sh_pfc *pfc) { return 0; }
#endif /* CONFIG_PM_SLEEP && CONFIG_ARM_PSCI_FW */
#ifdef DEBUG
+#define SH_PFC_MAX_REGS 300
+
static unsigned int sh_pfc_errors __initdata = 0;
static unsigned int sh_pfc_warnings __initdata = 0;
+static u32 *sh_pfc_regs __initdata = NULL;
+static u32 sh_pfc_num_regs __initdata = 0;
#define sh_pfc_err(fmt, ...) \
do { \
@@ -759,11 +763,31 @@ static bool __init same_name(const char *a, const char *b)
return !strcmp(a, b);
}
+static void __init sh_pfc_check_reg(const char *drvname, u32 reg)
+{
+ unsigned int i;
+
+ for (i = 0; i < sh_pfc_num_regs; i++)
+ if (reg == sh_pfc_regs[i]) {
+ sh_pfc_err("reg 0x%x conflict\n", reg);
+ return;
+ }
+
+ if (sh_pfc_num_regs == SH_PFC_MAX_REGS) {
+ pr_warn_once("%s: Please increase SH_PFC_MAX_REGS\n", drvname);
+ return;
+ }
+
+ sh_pfc_regs[sh_pfc_num_regs++] = reg;
+}
+
static void __init sh_pfc_check_cfg_reg(const char *drvname,
const struct pinmux_cfg_reg *cfg_reg)
{
unsigned int i, n, rw, fw;
+ sh_pfc_check_reg(drvname, cfg_reg->reg);
+
if (cfg_reg->field_width) {
/* Checked at build time */
return;
@@ -794,6 +818,7 @@ static void __init sh_pfc_check_info(const struct sh_pfc_soc_info *info)
unsigned int i, j, k;
pr_info("Checking %s\n", drvname);
+ sh_pfc_num_regs = 0;
/* Check pins */
for (i = 0; i < info->nr_pins; i++) {
@@ -868,6 +893,11 @@ static void __init sh_pfc_check_driver(const struct platform_driver *pdrv)
{
unsigned int i;
+ sh_pfc_regs = kcalloc(SH_PFC_MAX_REGS, sizeof(*sh_pfc_regs),
+ GFP_KERNEL);
+ if (!sh_pfc_regs)
+ return;
+
pr_warn("Checking builtin pinmux tables\n");
for (i = 0; pdrv->id_table[i].name[0]; i++)
@@ -880,6 +910,8 @@ static void __init sh_pfc_check_driver(const struct platform_driver *pdrv)
pr_warn("Detected %u errors and %u warnings\n", sh_pfc_errors,
sh_pfc_warnings);
+
+ kfree(sh_pfc_regs);
}
#else /* !DEBUG */
--
2.17.1
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