diff options
author | Tomasz Figa <t.figa@samsung.com> | 2013-05-16 11:57:08 +0200 |
---|---|---|
committer | Felipe Balbi <balbi@ti.com> | 2013-05-28 20:06:39 +0300 |
commit | 0aa823a2ca02cd21c587713e8195a2ffb8bd7872 (patch) | |
tree | 74f6e7bdbc4a60f899d0bb504593fe1dab7cc8a3 /drivers/usb/phy/phy-samsung-usb.c | |
parent | 87331b069761a292c7d832fc3bb34cde56418982 (diff) |
usb: phy: samsung: Consolidate reference clock rate handling
This patch cleans up handling of reference clock rate in Samsung USB PHY
drivers. It is mostly a cosmetic change but improves error handling in
case of failing to get reference clock or invalid clock rate.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/phy/phy-samsung-usb.c')
-rw-r--r-- | drivers/usb/phy/phy-samsung-usb.c | 114 |
1 files changed, 67 insertions, 47 deletions
diff --git a/drivers/usb/phy/phy-samsung-usb.c b/drivers/usb/phy/phy-samsung-usb.c index 62cdb7e13d97..c40ea321ae46 100644 --- a/drivers/usb/phy/phy-samsung-usb.c +++ b/drivers/usb/phy/phy-samsung-usb.c @@ -162,13 +162,76 @@ int samsung_usbphy_set_type(struct usb_phy *phy, } EXPORT_SYMBOL_GPL(samsung_usbphy_set_type); +int samsung_usbphy_rate_to_clksel_64xx(struct samsung_usbphy *sphy, + unsigned long rate) +{ + unsigned int clksel; + + switch (rate) { + case 12 * MHZ: + clksel = PHYCLK_CLKSEL_12M; + break; + case 24 * MHZ: + clksel = PHYCLK_CLKSEL_24M; + break; + case 48 * MHZ: + clksel = PHYCLK_CLKSEL_48M; + break; + default: + dev_err(sphy->dev, + "Invalid reference clock frequency: %lu\n", rate); + return -EINVAL; + } + + return clksel; +} +EXPORT_SYMBOL_GPL(samsung_usbphy_rate_to_clksel_64xx); + +int samsung_usbphy_rate_to_clksel_4x12(struct samsung_usbphy *sphy, + unsigned long rate) +{ + unsigned int clksel; + + switch (rate) { + case 9600 * KHZ: + clksel = FSEL_CLKSEL_9600K; + break; + case 10 * MHZ: + clksel = FSEL_CLKSEL_10M; + break; + case 12 * MHZ: + clksel = FSEL_CLKSEL_12M; + break; + case 19200 * KHZ: + clksel = FSEL_CLKSEL_19200K; + break; + case 20 * MHZ: + clksel = FSEL_CLKSEL_20M; + break; + case 24 * MHZ: + clksel = FSEL_CLKSEL_24M; + break; + case 50 * MHZ: + clksel = FSEL_CLKSEL_50M; + break; + default: + dev_err(sphy->dev, + "Invalid reference clock frequency: %lu\n", rate); + return -EINVAL; + } + + return clksel; +} +EXPORT_SYMBOL_GPL(samsung_usbphy_rate_to_clksel_4x12); + /* * Returns reference clock frequency selection value */ int samsung_usbphy_get_refclk_freq(struct samsung_usbphy *sphy) { struct clk *ref_clk; - int refclk_freq = 0; + unsigned long rate; + int refclk_freq; /* * In exynos5250 USB host and device PHY use @@ -183,52 +246,9 @@ int samsung_usbphy_get_refclk_freq(struct samsung_usbphy *sphy) return PTR_ERR(ref_clk); } - if (sphy->drv_data->cpu_type == TYPE_EXYNOS5250) { - /* set clock frequency for PLL */ - switch (clk_get_rate(ref_clk)) { - case 9600 * KHZ: - refclk_freq = FSEL_CLKSEL_9600K; - break; - case 10 * MHZ: - refclk_freq = FSEL_CLKSEL_10M; - break; - case 12 * MHZ: - refclk_freq = FSEL_CLKSEL_12M; - break; - case 19200 * KHZ: - refclk_freq = FSEL_CLKSEL_19200K; - break; - case 20 * MHZ: - refclk_freq = FSEL_CLKSEL_20M; - break; - case 50 * MHZ: - refclk_freq = FSEL_CLKSEL_50M; - break; - case 24 * MHZ: - default: - /* default reference clock */ - refclk_freq = FSEL_CLKSEL_24M; - break; - } - } else { - switch (clk_get_rate(ref_clk)) { - case 12 * MHZ: - refclk_freq = PHYCLK_CLKSEL_12M; - break; - case 24 * MHZ: - refclk_freq = PHYCLK_CLKSEL_24M; - break; - case 48 * MHZ: - refclk_freq = PHYCLK_CLKSEL_48M; - break; - default: - if (sphy->drv_data->cpu_type == TYPE_S3C64XX) - refclk_freq = PHYCLK_CLKSEL_48M; - else - refclk_freq = PHYCLK_CLKSEL_24M; - break; - } - } + rate = clk_get_rate(ref_clk); + refclk_freq = sphy->drv_data->rate_to_clksel(sphy, rate); + clk_put(ref_clk); return refclk_freq; |