diff options
| author | Ben Peled <bpeled@marvell.com> | 2019-08-05 13:03:09 +0300 |
|---|---|---|
| committer | Stephen Boyd <sboyd@kernel.org> | 2019-09-18 08:15:41 +0300 |
| commit | be69e55df9afc2eb37a2a602ad607e28e1e553d7 (patch) | |
| tree | 687962df221160fe10fdc21ead543f67fb78ae5f /drivers/clk/mvebu | |
| parent | 0099dc446bb6a72ce24d4f86760d0f4fe4300138 (diff) | |
| download | linux-be69e55df9afc2eb37a2a602ad607e28e1e553d7.tar.xz | |
clk: mvebu: ap806: Prepare the introduction of AP807 clock support
Factor out the code that is only useful to AP806 so it will be easier
to support AP807. No functional changes.
Signed-off-by: Ben Peled <bpeled@marvell.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lkml.kernel.org/r/20190805100310.29048-8-miquel.raynal@bootlin.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'drivers/clk/mvebu')
| -rw-r--r-- | drivers/clk/mvebu/ap806-system-controller.c | 140 |
1 files changed, 77 insertions, 63 deletions
diff --git a/drivers/clk/mvebu/ap806-system-controller.c b/drivers/clk/mvebu/ap806-system-controller.c index bc43adff02e0..c64e2cc4a3ba 100644 --- a/drivers/clk/mvebu/ap806-system-controller.c +++ b/drivers/clk/mvebu/ap806-system-controller.c @@ -30,100 +30,114 @@ static struct clk_onecell_data ap806_clk_data = { .clk_num = AP806_CLK_NUM, }; -static int ap806_syscon_common_probe(struct platform_device *pdev, - struct device_node *syscon_node) +static int ap806_get_sar_clocks(unsigned int freq_mode, + unsigned int *cpuclk_freq, + unsigned int *dclk_freq) { - unsigned int freq_mode, cpuclk_freq, dclk_freq; - const char *name, *fixedclk_name; - struct device *dev = &pdev->dev; - struct device_node *np = dev->of_node; - struct regmap *regmap; - u32 reg; - int ret; - - regmap = syscon_node_to_regmap(syscon_node); - if (IS_ERR(regmap)) { - dev_err(dev, "cannot get regmap\n"); - return PTR_ERR(regmap); - } - - ret = regmap_read(regmap, AP806_SAR_REG, ®); - if (ret) { - dev_err(dev, "cannot read from regmap\n"); - return ret; - } - - freq_mode = reg & AP806_SAR_CLKFREQ_MODE_MASK; switch (freq_mode) { case 0x0: + *cpuclk_freq = 2000; + *dclk_freq = 600; + break; case 0x1: - cpuclk_freq = 2000; + *cpuclk_freq = 2000; + *dclk_freq = 525; break; case 0x6: + *cpuclk_freq = 1800; + *dclk_freq = 600; + break; case 0x7: - cpuclk_freq = 1800; + *cpuclk_freq = 1800; + *dclk_freq = 525; break; case 0x4: + *cpuclk_freq = 1600; + *dclk_freq = 400; + break; case 0xB: + *cpuclk_freq = 1600; + *dclk_freq = 450; + break; case 0xD: - cpuclk_freq = 1600; + *cpuclk_freq = 1600; + *dclk_freq = 525; break; case 0x1a: - cpuclk_freq = 1400; + *cpuclk_freq = 1400; + *dclk_freq = 400; break; case 0x14: + *cpuclk_freq = 1300; + *dclk_freq = 400; + break; case 0x17: - cpuclk_freq = 1300; + *cpuclk_freq = 1300; + *dclk_freq = 325; break; case 0x19: - cpuclk_freq = 1200; + *cpuclk_freq = 1200; + *dclk_freq = 400; break; case 0x13: + *cpuclk_freq = 1000; + *dclk_freq = 325; + break; case 0x1d: - cpuclk_freq = 1000; + *cpuclk_freq = 1000; + *dclk_freq = 400; break; case 0x1c: - cpuclk_freq = 800; + *cpuclk_freq = 800; + *dclk_freq = 400; break; case 0x1b: - cpuclk_freq = 600; + *cpuclk_freq = 600; + *dclk_freq = 400; break; default: - dev_err(dev, "invalid Sample at Reset value\n"); return -EINVAL; } - /* Get DCLK frequency (DCLK = DDR_CLK / 2) */ - switch (freq_mode) { - case 0x0: - case 0x6: - /* DDR_CLK = 1200Mhz */ - dclk_freq = 600; - break; - case 0x1: - case 0x7: - case 0xD: - /* DDR_CLK = 1050Mhz */ - dclk_freq = 525; - break; - case 0x13: - case 0x17: - /* DDR_CLK = 650Mhz */ - dclk_freq = 325; - break; - case 0x4: - case 0x14: - case 0x19: - case 0x1A: - case 0x1B: - case 0x1C: - case 0x1D: - /* DDR_CLK = 800Mhz */ - dclk_freq = 400; - break; - default: - dclk_freq = 0; + return 0; +} + +static int ap806_syscon_common_probe(struct platform_device *pdev, + struct device_node *syscon_node) +{ + unsigned int freq_mode, cpuclk_freq, dclk_freq; + const char *name, *fixedclk_name; + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct regmap *regmap; + u32 reg; + int ret; + + regmap = syscon_node_to_regmap(syscon_node); + if (IS_ERR(regmap)) { + dev_err(dev, "cannot get regmap\n"); + return PTR_ERR(regmap); + } + + ret = regmap_read(regmap, AP806_SAR_REG, ®); + if (ret) { + dev_err(dev, "cannot read from regmap\n"); + return ret; + } + + freq_mode = reg & AP806_SAR_CLKFREQ_MODE_MASK; + + if (of_device_is_compatible(pdev->dev.of_node, + "marvell,ap806-clock")) { + ret = ap806_get_sar_clocks(freq_mode, &cpuclk_freq, &dclk_freq); + } else { + dev_err(dev, "compatible not supported\n"); + return -EINVAL; + } + + if (ret) { dev_err(dev, "invalid Sample at Reset value\n"); + return ret; } /* Convert to hertz */ |