diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2017-01-13 16:08:42 +0100 |
|---|---|---|
| committer | Stephen Boyd <sboyd@codeaurora.org> | 2017-01-26 16:10:02 -0800 |
| commit | 55921ce27695325e7bab667ccc7e4ada81a74f02 (patch) | |
| tree | a2efe74cf6839dac0e01d7f539189c5119046466 /drivers/clk/ux500 | |
| parent | 839a72af88635f222f6daef430e13a3f2dcb1e6e (diff) | |
| download | linux-55921ce27695325e7bab667ccc7e4ada81a74f02.tar.bz2 | |
clk: ux500: Convert ABx500 clocks to use OF probing
These clocks have been broken for a long time unfortunately, a
hurdle of misc problems made them stop working at some point
breaking USB and audio on Ux500.
The platform as such and all "regular" clocks are migrated to
OF/device tree, so let's migrate also this driver.
With this patch and the corresponding DTS fixes, and a bunch
of probe deferral fixes, audio starts working again on Ux500.
Cc: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/clk/ux500')
| -rw-r--r-- | drivers/clk/ux500/abx500-clk.c | 36 |
1 files changed, 26 insertions, 10 deletions
diff --git a/drivers/clk/ux500/abx500-clk.c b/drivers/clk/ux500/abx500-clk.c index 0467fcae3b0e..2257d12ba988 100644 --- a/drivers/clk/ux500/abx500-clk.c +++ b/drivers/clk/ux500/abx500-clk.c @@ -10,19 +10,26 @@ #include <linux/err.h> #include <linux/module.h> #include <linux/device.h> +#include <linux/of.h> #include <linux/platform_device.h> #include <linux/mfd/abx500/ab8500.h> #include <linux/mfd/abx500/ab8500-sysctrl.h> #include <linux/clkdev.h> #include <linux/clk-provider.h> +#include <dt-bindings/clock/ste-ab8500.h> #include "clk.h" +#define AB8500_NUM_CLKS 6 + +static struct clk *ab8500_clks[AB8500_NUM_CLKS]; +static struct clk_onecell_data ab8500_clk_data; + /* Clock definitions for ab8500 */ static int ab8500_reg_clks(struct device *dev) { int ret; struct clk *clk; - + struct device_node *np = dev->of_node; const char *intclk_parents[] = {"ab8500_sysclk", "ulpclk"}; u16 intclk_reg_sel[] = {0 , AB8500_SYSULPCLKCTRL1}; u8 intclk_reg_mask[] = {0 , AB8500_SYSULPCLKCTRL1_SYSULPCLKINTSEL_MASK}; @@ -31,8 +38,6 @@ static int ab8500_reg_clks(struct device *dev) (1 << AB8500_SYSULPCLKCTRL1_SYSULPCLKINTSEL_SHIFT) }; - dev_info(dev, "register clocks for ab850x\n"); - /* Enable SWAT */ ret = ab8500_sysctrl_set(AB8500_SWATCTRL, AB8500_SWATCTRL_SWATENABLE); if (ret) @@ -42,37 +47,43 @@ static int ab8500_reg_clks(struct device *dev) clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk2", "ab8500_sysclk", AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF2REQ, AB8500_SYSULPCLKCTRL1_SYSCLKBUF2REQ, 0, 0); - clk_register_clkdev(clk, "sysclk", "0-0070"); + ab8500_clks[AB8500_SYSCLK_BUF2] = clk; /* ab8500_sysclk3 */ clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk3", "ab8500_sysclk", AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF3REQ, AB8500_SYSULPCLKCTRL1_SYSCLKBUF3REQ, 0, 0); - clk_register_clkdev(clk, "sysclk", "cg1960_core.0"); + ab8500_clks[AB8500_SYSCLK_BUF3] = clk; /* ab8500_sysclk4 */ clk = clk_reg_sysctrl_gate(dev , "ab8500_sysclk4", "ab8500_sysclk", AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_SYSCLKBUF4REQ, AB8500_SYSULPCLKCTRL1_SYSCLKBUF4REQ, 0, 0); + ab8500_clks[AB8500_SYSCLK_BUF4] = clk; /* ab_ulpclk */ clk = clk_reg_sysctrl_gate_fixed_rate(dev, "ulpclk", NULL, AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_ULPCLKREQ, AB8500_SYSULPCLKCTRL1_ULPCLKREQ, 38400000, 9000, 0); - clk_register_clkdev(clk, "ulpclk", "snd-soc-mop500.0"); + ab8500_clks[AB8500_SYSCLK_ULP] = clk; /* ab8500_intclk */ clk = clk_reg_sysctrl_set_parent(dev , "intclk", intclk_parents, 2, intclk_reg_sel, intclk_reg_mask, intclk_reg_bits, 0); - clk_register_clkdev(clk, "intclk", "snd-soc-mop500.0"); - clk_register_clkdev(clk, NULL, "ab8500-pwm.1"); + ab8500_clks[AB8500_SYSCLK_INT] = clk; /* ab8500_audioclk */ clk = clk_reg_sysctrl_gate(dev , "audioclk", "intclk", AB8500_SYSULPCLKCTRL1, AB8500_SYSULPCLKCTRL1_AUDIOCLKENA, AB8500_SYSULPCLKCTRL1_AUDIOCLKENA, 0, 0); - clk_register_clkdev(clk, "audioclk", "ab8500-codec.0"); + ab8500_clks[AB8500_SYSCLK_AUDIO] = clk; + + ab8500_clk_data.clks = ab8500_clks; + ab8500_clk_data.clk_num = ARRAY_SIZE(ab8500_clks); + of_clk_add_provider(np, of_clk_src_onecell_get, &ab8500_clk_data); + + dev_info(dev, "registered clocks for ab850x\n"); return 0; } @@ -108,9 +119,15 @@ static int abx500_clk_probe(struct platform_device *pdev) return ret; } +static const struct of_device_id abx500_clk_match[] = { + { .compatible = "stericsson,ab8500-clk", }, + {} +}; + static struct platform_driver abx500_clk_driver = { .driver = { .name = "abx500-clk", + .of_match_table = abx500_clk_match, }, .probe = abx500_clk_probe, }; @@ -119,7 +136,6 @@ static int __init abx500_clk_init(void) { return platform_driver_register(&abx500_clk_driver); } - arch_initcall(abx500_clk_init); MODULE_AUTHOR("Ulf Hansson <ulf.hansson@linaro.org"); |