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author | Sascha Hauer <s.hauer@pengutronix.de> | 2013-04-15 15:22:24 +0200 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2013-06-20 08:49:56 +0200 |
commit | 1d0e15f098b01f384db8a238e69cf4787a9ea47c (patch) | |
tree | 54180880a980987874f62f1b05884af47cd1dbec /drivers/mci/mxs.c | |
parent | 68fa6a7ada61dd7a00b2b4fe75a0385146481fa2 (diff) | |
download | barebox-1d0e15f098b01f384db8a238e69cf4787a9ea47c.tar.gz barebox-1d0e15f098b01f384db8a238e69cf4787a9ea47c.tar.xz |
mci: mxs: use common clk API
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/mci/mxs.c')
-rw-r--r-- | drivers/mci/mxs.c | 60 |
1 files changed, 19 insertions, 41 deletions
diff --git a/drivers/mci/mxs.c b/drivers/mci/mxs.c index cb2911a35f..023f92236a 100644 --- a/drivers/mci/mxs.c +++ b/drivers/mci/mxs.c @@ -36,6 +36,8 @@ #include <errno.h> #include <clock.h> #include <io.h> +#include <linux/clk.h> +#include <linux/err.h> #include <asm/bitops.h> #include <mach/mxs.h> #include <mach/imx-regs.h> @@ -49,8 +51,8 @@ struct mxs_mci_host { struct mci_host host; void __iomem *regs; + struct clk *clk; unsigned clock; /* current clock speed in Hz ("0" if disabled) */ - unsigned index; #ifdef CONFIG_MCI_INFO unsigned f_min; unsigned f_max; @@ -61,16 +63,6 @@ struct mxs_mci_host { #define to_mxs_mci(mxs) container_of(mxs, struct mxs_mci_host, host) /** - * Get the SSP clock rate - * @param hw_dev Host interface device instance - * @return Unit's clock in [Hz] - */ -static unsigned mxs_mci_get_unit_clock(struct mxs_mci_host *mxs_mci) -{ - return imx_get_sspclk(mxs_mci->index); -} - -/** * Get MCI cards response if defined for the type of command * @param hw_dev Host interface device instance * @param cmd Command description @@ -430,7 +422,7 @@ static unsigned mxs_mci_setup_clock_speed(struct mxs_mci_host *mxs_mci, unsigned return 0; } - ssp = mxs_mci_get_unit_clock(mxs_mci); + ssp = clk_get_rate(mxs_mci->clk); for (div = 2; div < 255; div += 2) { rate = DIV_ROUND_CLOSEST(DIV_ROUND_CLOSEST(ssp, nc), div); @@ -558,6 +550,7 @@ static int mxs_mci_probe(struct device_d *hw_dev) struct mxs_mci_platform_data *pd = hw_dev->platform_data; struct mxs_mci_host *mxs_mci; struct mci_host *host; + unsigned long rate; if (hw_dev->platform_data == NULL) { dev_err(hw_dev, "Missing platform data\n"); @@ -578,44 +571,29 @@ static int mxs_mci_probe(struct device_d *hw_dev) host->voltages = pd->voltages; host->host_caps = pd->caps; -#ifdef CONFIG_ARCH_IMX23 - mxs_mci->index = 0; /* there is only one clock for all */ -#endif -#ifdef CONFIG_ARCH_IMX28 - /* one dedicated clock per unit */ - switch (hw_dev->resource[0].start) { - case IMX_SSP0_BASE: - mxs_mci->index = 0; - break; - case IMX_SSP1_BASE: - mxs_mci->index = 1; - break; - case IMX_SSP2_BASE: - mxs_mci->index = 2; - break; - case IMX_SSP3_BASE: - mxs_mci->index = 3; - break; - default: - pr_debug("Unknown SSP unit at address 0x%p\n", mxs_mci->regs); - return 0; - } -#endif + mxs_mci->clk = clk_get(hw_dev, NULL); + if (IS_ERR(mxs_mci->clk)) + return PTR_ERR(mxs_mci->clk); + + clk_enable(mxs_mci->clk); + + rate = clk_get_rate(mxs_mci->clk); + if (pd->f_min == 0) { - host->f_min = mxs_mci_get_unit_clock(mxs_mci) / 254 / 256; + host->f_min = rate / 254 / 256; dev_dbg(hw_dev, "Min. frequency is %u Hz\n", host->f_min); } else { host->f_min = pd->f_min; - dev_dbg(hw_dev, "Min. frequency is %u Hz, could be %u Hz\n", - host->f_min, mxs_mci_get_unit_clock(mxs_mci) / 254 / 256); + dev_dbg(hw_dev, "Min. frequency is %u Hz, could be %lu Hz\n", + host->f_min, rate / 254 / 256); } if (pd->f_max == 0) { - host->f_max = mxs_mci_get_unit_clock(mxs_mci) / 2 / 1; + host->f_max = rate / 2 / 1; dev_dbg(hw_dev, "Max. frequency is %u Hz\n", host->f_max); } else { host->f_max = pd->f_max; - dev_dbg(hw_dev, "Max. frequency is %u Hz, could be %u Hz\n", - host->f_max, mxs_mci_get_unit_clock(mxs_mci) / 2 / 1); + dev_dbg(hw_dev, "Max. frequency is %u Hz, could be %lu Hz\n", + host->f_max, rate / 2 / 1); } if (IS_ENABLED(CONFIG_MCI_INFO)) { |