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authorLinus Walleij <linus.walleij@linaro.org>2017-05-18 23:17:00 +0300
committerDaniel Lezcano <daniel.lezcano@linaro.org>2017-06-12 11:13:59 +0300
commitdd98442e17a66318b021d4342abf53069cc8bed1 (patch)
tree965ca5849303b2667dc8060d46b59ef7c9dd4572 /drivers/clocksource/timer-fttmr010.c
parent454a65f43a33d48ea04ffaf635ef35abc3d27990 (diff)
downloadlinux-dd98442e17a66318b021d4342abf53069cc8bed1.tar.xz
clocksource/drivers/fttmr010: Drop Gemini specifics
The Gemini now has a proper clock driver and a proper PCLK assigned in its device tree. Drop the Gemini-specific hacks to look up the system speed and rely on the clock framework like everyone else. Cc: Joel Stanley <joel@jms.id.au> Tested-by: Jonas Jensen <jonas.jensen@gmail.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Diffstat (limited to 'drivers/clocksource/timer-fttmr010.c')
-rw-r--r--drivers/clocksource/timer-fttmr010.c103
1 files changed, 22 insertions, 81 deletions
diff --git a/drivers/clocksource/timer-fttmr010.c b/drivers/clocksource/timer-fttmr010.c
index 58ce017e4a65..db097db346e3 100644
--- a/drivers/clocksource/timer-fttmr010.c
+++ b/drivers/clocksource/timer-fttmr010.c
@@ -11,8 +11,6 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_irq.h>
-#include <linux/mfd/syscon.h>
-#include <linux/regmap.h>
#include <linux/clockchips.h>
#include <linux/clocksource.h>
#include <linux/sched_clock.h>
@@ -179,9 +177,28 @@ static struct irqaction fttmr010_timer_irq = {
.handler = fttmr010_timer_interrupt,
};
-static int __init fttmr010_timer_common_init(struct device_node *np)
+static int __init fttmr010_timer_init(struct device_node *np)
{
int irq;
+ struct clk *clk;
+ int ret;
+
+ /*
+ * These implementations require a clock reference.
+ * FIXME: we currently only support clocking using PCLK
+ * and using EXTCLK is not supported in the driver.
+ */
+ clk = of_clk_get_by_name(np, "PCLK");
+ if (IS_ERR(clk)) {
+ pr_err("could not get PCLK\n");
+ return PTR_ERR(clk);
+ }
+ ret = clk_prepare_enable(clk);
+ if (ret) {
+ pr_err("failed to enable PCLK\n");
+ return ret;
+ }
+ tick_rate = clk_get_rate(clk);
base = of_iomap(np, 0);
if (!base) {
@@ -229,81 +246,5 @@ static int __init fttmr010_timer_common_init(struct device_node *np)
return 0;
}
-
-static int __init fttmr010_timer_of_init(struct device_node *np)
-{
- /*
- * These implementations require a clock reference.
- * FIXME: we currently only support clocking using PCLK
- * and using EXTCLK is not supported in the driver.
- */
- struct clk *clk;
- int ret;
-
- clk = of_clk_get_by_name(np, "PCLK");
- if (IS_ERR(clk)) {
- pr_err("could not get PCLK\n");
- return PTR_ERR(clk);
- }
- ret = clk_prepare_enable(clk);
- if (ret) {
- pr_err("failed to enable PCLK\n");
- return ret;
- }
- tick_rate = clk_get_rate(clk);
-
- return fttmr010_timer_common_init(np);
-}
-CLOCKSOURCE_OF_DECLARE(fttmr010, "faraday,fttmr010", fttmr010_timer_of_init);
-
-/*
- * Gemini-specific: relevant registers in the global syscon
- */
-#define GLOBAL_STATUS 0x04
-#define CPU_AHB_RATIO_MASK (0x3 << 18)
-#define CPU_AHB_1_1 (0x0 << 18)
-#define CPU_AHB_3_2 (0x1 << 18)
-#define CPU_AHB_24_13 (0x2 << 18)
-#define CPU_AHB_2_1 (0x3 << 18)
-#define REG_TO_AHB_SPEED(reg) ((((reg) >> 15) & 0x7) * 10 + 130)
-
-static int __init gemini_timer_of_init(struct device_node *np)
-{
- static struct regmap *map;
- int ret;
- u32 val;
-
- map = syscon_regmap_lookup_by_phandle(np, "syscon");
- if (IS_ERR(map)) {
- pr_err("Can't get regmap for syscon handle\n");
- return -ENODEV;
- }
- ret = regmap_read(map, GLOBAL_STATUS, &val);
- if (ret) {
- pr_err("Can't read syscon status register\n");
- return -ENXIO;
- }
-
- tick_rate = REG_TO_AHB_SPEED(val) * 1000000;
- pr_info("Bus: %dMHz ", tick_rate / 1000000);
-
- tick_rate /= 6; /* APB bus run AHB*(1/6) */
-
- switch (val & CPU_AHB_RATIO_MASK) {
- case CPU_AHB_1_1:
- pr_cont("(1/1)\n");
- break;
- case CPU_AHB_3_2:
- pr_cont("(3/2)\n");
- break;
- case CPU_AHB_24_13:
- pr_cont("(24/13)\n");
- break;
- case CPU_AHB_2_1:
- pr_cont("(2/1)\n");
- break;
- }
-
- return fttmr010_timer_common_init(np);
-}
-CLOCKSOURCE_OF_DECLARE(gemini, "cortina,gemini-timer", gemini_timer_of_init);
+CLOCKSOURCE_OF_DECLARE(fttmr010, "faraday,fttmr010", fttmr010_timer_init);
+CLOCKSOURCE_OF_DECLARE(gemini, "cortina,gemini-timer", fttmr010_timer_init);