diff options
| author | Omri Itach <omrii@marvell.com> | 2019-08-05 13:03:08 +0300 |
|---|---|---|
| committer | Stephen Boyd <sboyd@kernel.org> | 2019-09-18 08:15:41 +0300 |
| commit | 0099dc446bb6a72ce24d4f86760d0f4fe4300138 (patch) | |
| tree | 9dd547a600631708e82db7f4626e960924bafe0e /drivers | |
| parent | cd016cb01835e0b9f62fb675b336fbded912dcb6 (diff) | |
| download | linux-0099dc446bb6a72ce24d4f86760d0f4fe4300138.tar.xz | |
clk: mvebu: ap806: add AP-DCLK (hclk) to system controller driver
Add dynamic AP-DCLK clock (hclk) to system controller driver. AP-DCLK
is half the rate of DDR clock, so its derrived from Sample At Reset
configuration. The clock frequency is required for AP806 AXI monitor
profiling feature.
Signed-off-by: Omri Itach <omrii@marvell.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lkml.kernel.org/r/20190805100310.29048-7-miquel.raynal@bootlin.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/clk/mvebu/ap806-system-controller.c | 48 |
1 files changed, 46 insertions, 2 deletions
diff --git a/drivers/clk/mvebu/ap806-system-controller.c b/drivers/clk/mvebu/ap806-system-controller.c index 2cf874f01394..bc43adff02e0 100644 --- a/drivers/clk/mvebu/ap806-system-controller.c +++ b/drivers/clk/mvebu/ap806-system-controller.c @@ -21,7 +21,7 @@ #define AP806_SAR_REG 0x400 #define AP806_SAR_CLKFREQ_MODE_MASK 0x1f -#define AP806_CLK_NUM 5 +#define AP806_CLK_NUM 6 static struct clk *ap806_clks[AP806_CLK_NUM]; @@ -33,7 +33,7 @@ static struct clk_onecell_data ap806_clk_data = { static int ap806_syscon_common_probe(struct platform_device *pdev, struct device_node *syscon_node) { - unsigned int freq_mode, cpuclk_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; @@ -93,8 +93,42 @@ static int ap806_syscon_common_probe(struct platform_device *pdev, 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; + dev_err(dev, "invalid Sample at Reset value\n"); + } + /* Convert to hertz */ cpuclk_freq *= 1000 * 1000; + dclk_freq *= 1000 * 1000; /* CPU clocks depend on the Sample At Reset configuration */ name = ap_cp_unique_name(dev, syscon_node, "pll-cluster-0"); @@ -141,6 +175,14 @@ static int ap806_syscon_common_probe(struct platform_device *pdev, goto fail4; } + /* AP-DCLK(HCLK) Clock is DDR clock divided by 2 */ + name = ap_cp_unique_name(dev, syscon_node, "ap-dclk"); + ap806_clks[5] = clk_register_fixed_rate(dev, name, NULL, 0, dclk_freq); + if (IS_ERR(ap806_clks[5])) { + ret = PTR_ERR(ap806_clks[5]); + goto fail5; + } + ret = of_clk_add_provider(np, of_clk_src_onecell_get, &ap806_clk_data); if (ret) goto fail_clk_add; @@ -148,6 +190,8 @@ static int ap806_syscon_common_probe(struct platform_device *pdev, return 0; fail_clk_add: + clk_unregister_fixed_factor(ap806_clks[5]); +fail5: clk_unregister_fixed_factor(ap806_clks[4]); fail4: clk_unregister_fixed_factor(ap806_clks[3]); |