[PATCH v2] ARM: OMAP1: Prepare for conversion of OMAP1 clocks to CCF

Janusz Krzysztofik
2022-03-21T22:06:24Z

In preparation for conversion of OMAP1 clocks to common clock framework,
identify users of those clocks which don't call clk_prepare/unprepare()
and update them to call clk_prepare_enable/clk_disable_unprepare() instead
of just clk_enable/disable(), as required by CCF implementation of clock
API.

v2: update still a few more OMAP specific drivers missed in v1,
- call clk_prepare/unprepare() just after/before clk_get/put() where it
can make more sense than merging prepare/unprepare with enable/disable.

Signed-off-by: Janusz Krzysztofik <jmkrzyszt@gmail.com>
---
arch/arm/mach-omap1/mcbsp.c | 8 ++++----
arch/arm/mach-omap1/ocpi.c | 4 ++--
arch/arm/mach-omap1/serial.c | 6 +++---
arch/arm/mach-omap1/timer32k.c | 2 +-
drivers/mmc/host/omap.c | 23 ++++++++++++++---------
drivers/usb/gadget/udc/omap_udc.c | 14 ++++++++------
drivers/usb/host/ohci-omap.c | 18 ++++++++++++++++--
drivers/video/fbdev/omap/hwa742.c | 6 +++---
drivers/video/fbdev/omap/lcdc.c | 6 +++---
drivers/video/fbdev/omap/sossi.c | 5 +++--
sound/soc/ti/osk5912.c | 9 ++++++++-
11 files changed, 65 insertions(+), 36 deletions(-)

diff --git a/arch/arm/mach-omap1/mcbsp.c b/arch/arm/mach-omap1/mcbsp.c
index f36c34f47f11..3ec2badff6af 100644
--- a/arch/arm/mach-omap1/mcbsp.c
+++ b/arch/arm/mach-omap1/mcbsp.c
@@ -44,8 +44,8 @@ static void omap1_mcbsp_request(unsigned int id)
api_clk = clk_get(NULL, "api_ck");
dsp_clk = clk_get(NULL, "dsp_ck");
if (!IS_ERR(api_clk) && !IS_ERR(dsp_clk)) {
- clk_enable(api_clk);
- clk_enable(dsp_clk);
+ clk_prepare_enable(api_clk);
+ clk_prepare_enable(dsp_clk);

/*
* DSP external peripheral reset
@@ -63,11 +63,11 @@ static void omap1_mcbsp_free(unsigned int id)
if (id == 0 || id == 2) {
if (--dsp_use == 0) {
if (!IS_ERR(api_clk)) {
- clk_disable(api_clk);
+ clk_disable_unprepare(api_clk);
clk_put(api_clk);
}
if (!IS_ERR(dsp_clk)) {
- clk_disable(dsp_clk);
+ clk_disable_unprepare(dsp_clk);
clk_put(dsp_clk);
}
}
diff --git a/arch/arm/mach-omap1/ocpi.c b/arch/arm/mach-omap1/ocpi.c
index 380ea2de58c1..03cc48024fd6 100644
--- a/arch/arm/mach-omap1/ocpi.c
+++ b/arch/arm/mach-omap1/ocpi.c
@@ -73,7 +73,7 @@ static int __init omap_ocpi_init(void)
if (IS_ERR(ocpi_ck))
return PTR_ERR(ocpi_ck);

- clk_enable(ocpi_ck);
+ clk_prepare_enable(ocpi_ck);
ocpi_enable();
pr_info("OMAP OCPI interconnect driver loaded\n");

@@ -87,7 +87,7 @@ static void __exit omap_ocpi_exit(void)
if (!cpu_is_omap16xx())
return;

- clk_disable(ocpi_ck);
+ clk_disable_unprepare(ocpi_ck);
clk_put(ocpi_ck);
}

diff --git a/arch/arm/mach-omap1/serial.c b/arch/arm/mach-omap1/serial.c
index 9eb591fbfd89..5f591a836ab5 100644
--- a/arch/arm/mach-omap1/serial.c
+++ b/arch/arm/mach-omap1/serial.c
@@ -141,7 +141,7 @@ void __init omap_serial_init(void)
if (IS_ERR(uart1_ck))
printk("Could not get uart1_ck\n");
else {
- clk_enable(uart1_ck);
+ clk_prepare_enable(uart1_ck);
if (cpu_is_omap15xx())
clk_set_rate(uart1_ck, 12000000);
}
@@ -151,7 +151,7 @@ void __init omap_serial_init(void)
if (IS_ERR(uart2_ck))
printk("Could not get uart2_ck\n");
else {
- clk_enable(uart2_ck);
+ clk_prepare_enable(uart2_ck);
if (cpu_is_omap15xx())
clk_set_rate(uart2_ck, 12000000);
else
@@ -163,7 +163,7 @@ void __init omap_serial_init(void)
if (IS_ERR(uart3_ck))
printk("Could not get uart3_ck\n");
else {
- clk_enable(uart3_ck);
+ clk_prepare_enable(uart3_ck);
if (cpu_is_omap15xx())
clk_set_rate(uart3_ck, 12000000);
}
diff --git a/arch/arm/mach-omap1/timer32k.c b/arch/arm/mach-omap1/timer32k.c
index 780fdf03c3ce..049c7b7f28c4 100644
--- a/arch/arm/mach-omap1/timer32k.c
+++ b/arch/arm/mach-omap1/timer32k.c
@@ -180,7 +180,7 @@ int __init omap_32k_timer_init(void)

sync32k_ick = clk_get(NULL, "omap_32ksync_ick");
if (!IS_ERR(sync32k_ick))
- clk_enable(sync32k_ick);
+ clk_prepare_enable(sync32k_ick);

ret = omap_init_clocksource_32k(base);
}
diff --git a/drivers/mmc/host/omap.c b/drivers/mmc/host/omap.c
index 5e5af34090f1..57d39283924d 100644
--- a/drivers/mmc/host/omap.c
+++ b/drivers/mmc/host/omap.c
@@ -1374,7 +1374,7 @@ static int mmc_omap_probe(struct platform_device *pdev)
host->iclk = clk_get(&pdev->dev, "ick");
if (IS_ERR(host->iclk))
return PTR_ERR(host->iclk);
- clk_enable(host->iclk);
+ clk_prepare_enable(host->iclk);

host->fclk = clk_get(&pdev->dev, "fck");
if (IS_ERR(host->fclk)) {
@@ -1382,16 +1382,18 @@ static int mmc_omap_probe(struct platform_device *pdev)
goto err_free_iclk;
}

+ ret = clk_prepare(host->fclk);
+ if (ret)
+ goto err_put_fclk;
+
host->dma_tx_burst = -1;
host->dma_rx_burst = -1;

host->dma_tx = dma_request_chan(&pdev->dev, "tx");
if (IS_ERR(host->dma_tx)) {
ret = PTR_ERR(host->dma_tx);
- if (ret == -EPROBE_DEFER) {
- clk_put(host->fclk);
- goto err_free_iclk;
- }
+ if (ret == -EPROBE_DEFER)
+ goto err_free_fclk;

host->dma_tx = NULL;
dev_warn(host->dev, "TX DMA channel request failed\n");
@@ -1403,8 +1405,7 @@ static int mmc_omap_probe(struct platform_device *pdev)
if (ret == -EPROBE_DEFER) {
if (host->dma_tx)
dma_release_channel(host->dma_tx);
- clk_put(host->fclk);
- goto err_free_iclk;
+ goto err_free_fclk;
}

host->dma_rx = NULL;
@@ -1454,9 +1455,12 @@ static int mmc_omap_probe(struct platform_device *pdev)
dma_release_channel(host->dma_tx);
if (host->dma_rx)
dma_release_channel(host->dma_rx);
+err_free_fclk:
+ clk_unprepare(host->fclk);
+err_put_fclk:
clk_put(host->fclk);
err_free_iclk:
- clk_disable(host->iclk);
+ clk_disable_unprepare(host->iclk);
clk_put(host->iclk);
return ret;
}
@@ -1476,8 +1480,9 @@ static int mmc_omap_remove(struct platform_device *pdev)

mmc_omap_fclk_enable(host, 0);
free_irq(host->irq, host);
+ clk_unprepare(host->fclk);
clk_put(host->fclk);
- clk_disable(host->iclk);
+ clk_disable_unprepare(host->iclk);
clk_put(host->iclk);

if (host->dma_tx)
diff --git a/drivers/usb/gadget/udc/omap_udc.c b/drivers/usb/gadget/udc/omap_udc.c
index 494da00398d7..8768a3280e19 100644
--- a/drivers/usb/gadget/udc/omap_udc.c
+++ b/drivers/usb/gadget/udc/omap_udc.c
@@ -2604,6 +2604,8 @@ static void omap_udc_release(struct device *dev)
if (udc->dc_clk) {
if (udc->clk_requested)
omap_udc_enable_clock(0);
+ clk_unprepare(udc->hhc_clk);
+ clk_unprepare(udc->dc_clk);
clk_put(udc->hhc_clk);
clk_put(udc->dc_clk);
}
@@ -2768,8 +2770,8 @@ static int omap_udc_probe(struct platform_device *pdev)
hhc_clk = clk_get(&pdev->dev, "usb_hhc_ck");
BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
/* can't use omap_udc_enable_clock yet */
- clk_enable(dc_clk);
- clk_enable(hhc_clk);
+ clk_prepare_enable(dc_clk);
+ clk_prepare_enable(hhc_clk);
udelay(100);
}

@@ -2778,8 +2780,8 @@ static int omap_udc_probe(struct platform_device *pdev)
hhc_clk = clk_get(&pdev->dev, "l3_ocpi_ck");
BUG_ON(IS_ERR(dc_clk) || IS_ERR(hhc_clk));
/* can't use omap_udc_enable_clock yet */
- clk_enable(dc_clk);
- clk_enable(hhc_clk);
+ clk_prepare_enable(dc_clk);
+ clk_prepare_enable(hhc_clk);
udelay(100);
}

@@ -2927,8 +2929,8 @@ static int omap_udc_probe(struct platform_device *pdev)
usb_put_phy(xceiv);

if (cpu_is_omap16xx() || cpu_is_omap7xx()) {
- clk_disable(hhc_clk);
- clk_disable(dc_clk);
+ clk_disable_unprepare(hhc_clk);
+ clk_disable_unprepare(dc_clk);
clk_put(hhc_clk);
clk_put(dc_clk);
}
diff --git a/drivers/usb/host/ohci-omap.c b/drivers/usb/host/ohci-omap.c
index 45dcf8292072..2ab2e089a2b7 100644
--- a/drivers/usb/host/ohci-omap.c
+++ b/drivers/usb/host/ohci-omap.c
@@ -281,6 +281,10 @@ static int ohci_hcd_omap_probe(struct platform_device *pdev)
goto err_put_hcd;
}

+ retval = clk_prepare(priv->usb_host_ck);
+ if (retval)
+ goto err_put_host_ck;
+
if (!cpu_is_omap15xx())
priv->usb_dc_ck = clk_get(&pdev->dev, "usb_dc_ck");
else
@@ -288,13 +292,17 @@ static int ohci_hcd_omap_probe(struct platform_device *pdev)

if (IS_ERR(priv->usb_dc_ck)) {
retval = PTR_ERR(priv->usb_dc_ck);
- goto err_put_host_ck;
+ goto err_unprepare_host_ck;
}

+ retval = clk_prepare(priv->usb_dc_ck);
+ if (retval)
+ goto err_put_dc_ck;
+
if (!request_mem_region(hcd->rsrc_start, hcd->rsrc_len, hcd_name)) {
dev_dbg(&pdev->dev, "request_mem_region failed\n");
retval = -EBUSY;
- goto err_put_dc_ck;
+ goto err_unprepare_dc_ck;
}

hcd->regs = ioremap(hcd->rsrc_start, hcd->rsrc_len);
@@ -319,8 +327,12 @@ static int ohci_hcd_omap_probe(struct platform_device *pdev)
iounmap(hcd->regs);
err2:
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+err_unprepare_dc_ck:
+ clk_unprepare(priv->usb_dc_ck);
err_put_dc_ck:
clk_put(priv->usb_dc_ck);
+err_unprepare_host_ck:
+ clk_unprepare(priv->usb_host_ck);
err_put_host_ck:
clk_put(priv->usb_host_ck);
err_put_hcd:
@@ -355,7 +367,9 @@ static int ohci_hcd_omap_remove(struct platform_device *pdev)
}
iounmap(hcd->regs);
release_mem_region(hcd->rsrc_start, hcd->rsrc_len);
+ clk_unprepare(priv->usb_dc_ck);
clk_put(priv->usb_dc_ck);
+ clk_unprepare(priv->usb_host_ck);
clk_put(priv->usb_host_ck);
usb_put_hcd(hcd);
return 0;
diff --git a/drivers/video/fbdev/omap/hwa742.c b/drivers/video/fbdev/omap/hwa742.c
index b191bef22d98..9d9fe5c3a7a1 100644
--- a/drivers/video/fbdev/omap/hwa742.c
+++ b/drivers/video/fbdev/omap/hwa742.c
@@ -964,7 +964,7 @@ static int hwa742_init(struct omapfb_device *fbdev, int ext_mode,
if ((r = calc_extif_timings(ext_clk, &extif_mem_div)) < 0)
goto err3;
hwa742.extif->set_timings(&hwa742.reg_timings);
- clk_enable(hwa742.sys_ck);
+ clk_prepare_enable(hwa742.sys_ck);

calc_hwa742_clk_rates(ext_clk, &sys_clk, &pix_clk);
if ((r = calc_extif_timings(sys_clk, &extif_mem_div)) < 0)
@@ -1023,7 +1023,7 @@ static int hwa742_init(struct omapfb_device *fbdev, int ext_mode,

return 0;
err4:
- clk_disable(hwa742.sys_ck);
+ clk_disable_unprepare(hwa742.sys_ck);
err3:
hwa742.extif->cleanup();
err2:
@@ -1037,7 +1037,7 @@ static void hwa742_cleanup(void)
hwa742_set_update_mode(OMAPFB_UPDATE_DISABLED);
hwa742.extif->cleanup();
hwa742.int_ctrl->cleanup();
- clk_disable(hwa742.sys_ck);
+ clk_disable_unprepare(hwa742.sys_ck);
}

struct lcd_ctrl hwa742_ctrl = {
diff --git a/drivers/video/fbdev/omap/lcdc.c b/drivers/video/fbdev/omap/lcdc.c
index 7317c9aad677..97d20dc0d1d0 100644
--- a/drivers/video/fbdev/omap/lcdc.c
+++ b/drivers/video/fbdev/omap/lcdc.c
@@ -711,7 +711,7 @@ static int omap_lcdc_init(struct omapfb_device *fbdev, int ext_mode,
dev_err(fbdev->dev, "failed to adjust LCD rate\n");
goto fail1;
}
- clk_enable(lcdc.lcd_ck);
+ clk_prepare_enable(lcdc.lcd_ck);

r = request_irq(OMAP_LCDC_IRQ, lcdc_irq_handler, 0, MODULE_NAME, fbdev);
if (r) {
@@ -746,7 +746,7 @@ static int omap_lcdc_init(struct omapfb_device *fbdev, int ext_mode,
fail3:
free_irq(OMAP_LCDC_IRQ, lcdc.fbdev);
fail2:
- clk_disable(lcdc.lcd_ck);
+ clk_disable_unprepare(lcdc.lcd_ck);
fail1:
clk_put(lcdc.lcd_ck);
fail0:
@@ -760,7 +760,7 @@ static void omap_lcdc_cleanup(void)
free_fbmem();
omap_free_lcd_dma();
free_irq(OMAP_LCDC_IRQ, lcdc.fbdev);
- clk_disable(lcdc.lcd_ck);
+ clk_disable_unprepare(lcdc.lcd_ck);
clk_put(lcdc.lcd_ck);
}

diff --git a/drivers/video/fbdev/omap/sossi.c b/drivers/video/fbdev/omap/sossi.c
index 80ac67f27f0d..b9cb8b386627 100644
--- a/drivers/video/fbdev/omap/sossi.c
+++ b/drivers/video/fbdev/omap/sossi.c
@@ -598,7 +598,7 @@ static int sossi_init(struct omapfb_device *fbdev)
l &= ~CONF_SOSSI_RESET_R;
omap_writel(l, MOD_CONF_CTRL_1);

- clk_enable(sossi.fck);
+ clk_prepare_enable(sossi.fck);
l = omap_readl(ARM_IDLECT2);
l &= ~(1 << 8); /* DMACK_REQ */
omap_writel(l, ARM_IDLECT2);
@@ -649,7 +649,7 @@ static int sossi_init(struct omapfb_device *fbdev)
return 0;

err:
- clk_disable(sossi.fck);
+ clk_disable_unprepare(sossi.fck);
clk_put(sossi.fck);
return r;
}
@@ -657,6 +657,7 @@ static int sossi_init(struct omapfb_device *fbdev)
static void sossi_cleanup(void)
{
omap_lcdc_free_dma_callback();
+ clk_unprepare(sossi.fck);
clk_put(sossi.fck);
iounmap(sossi.base);
}
diff --git a/sound/soc/ti/osk5912.c b/sound/soc/ti/osk5912.c
index 40e29dda7e7a..22da3b335e81 100644
--- a/sound/soc/ti/osk5912.c
+++ b/sound/soc/ti/osk5912.c
@@ -134,6 +134,10 @@ static int __init osk_soc_init(void)
goto err2;
}

+ err = clk_prepare(tlv320aic23_mclk);
+ if (err)
+ goto err3;
+
/*
* Configure 12 MHz output on MCLK.
*/
@@ -142,7 +146,7 @@ static int __init osk_soc_init(void)
if (clk_set_rate(tlv320aic23_mclk, CODEC_CLOCK)) {
printk(KERN_ERR "Cannot set MCLK for AIC23 CODEC\n");
err = -ECANCELED;
- goto err3;
+ goto err4;
}
}

@@ -151,6 +155,8 @@ static int __init osk_soc_init(void)

return 0;

+err4:
+ clk_unprepare(tlv320aic23_mclk);
err3:
clk_put(tlv320aic23_mclk);
err2:
@@ -164,6 +170,7 @@ static int __init osk_soc_init(void)

static void __exit osk_soc_exit(void)
{
+ clk_unprepare(tlv320aic23_mclk);
clk_put(tlv320aic23_mclk);
platform_device_unregister(osk_snd_device);
}
--
2.35.1